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using System;
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using System.Collections;
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using System.Collections.Specialized;
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using System.Data;
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using System.Data.SQLite;
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using System.Configuration;
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namespace Bro.M071.DBManager
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{
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public class SQLiteHelper
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{
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//Êý¾Ý¿âÁ¬½Ó×Ö·û´®
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public static string connectionString = ConfigurationManager.ConnectionStrings["DataBase"].ConnectionString;
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public SQLiteHelper() { }
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#region ¹«Ó÷½·¨
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public static int GetMaxID(string FieldName, string TableName)
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{
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string strsql = "select max(" + FieldName + ")+1 from " + TableName;
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object obj = GetSingle(strsql);
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if (obj == null)
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{
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return 1;
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}
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else
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{
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return int.Parse(obj.ToString());
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}
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}
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public static bool Exists(string strSql)
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{
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object obj = GetSingle(strSql);
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int cmdresult;
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if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
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{
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cmdresult = 0;
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}
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else
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{
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cmdresult = int.Parse(obj.ToString());
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}
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if (cmdresult == 0)
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{
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return false;
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}
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else
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{
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return true;
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}
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}
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public static bool Exists(string strSql, params SQLiteParameter[] cmdParms)
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{
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object obj = GetSingle(strSql, cmdParms);
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int cmdresult;
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if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
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{
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cmdresult = 0;
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}
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else
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{
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cmdresult = int.Parse(obj.ToString());
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}
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if (cmdresult == 0)
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{
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return false;
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}
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else
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{
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return true;
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}
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}
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#endregion
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#region Ö´Ðмòµ¥SQLÓï¾ä
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/// <summary>
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/// Ö´ÐÐSQLÓï¾ä£¬·µ»ØÓ°ÏìµÄ¼Ç¼Êý
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/// </summary>
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/// <param name="SQLString">SQLÓï¾ä</param>
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/// <returns>Ó°ÏìµÄ¼Ç¼Êý</returns>
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public static int ExecuteSql(string SQLString)
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{
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using (SQLiteConnection connection = new SQLiteConnection(connectionString))
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{
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using (SQLiteCommand cmd = new SQLiteCommand(SQLString, connection))
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{
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try
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{
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connection.Open();
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int rows = cmd.ExecuteNonQuery();
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return rows;
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}
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catch (System.Data.SQLite.SQLiteException E)
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{
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connection.Close();
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throw new Exception(E.Message);
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}
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}
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}
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}
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/// <summary>
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/// Ö´ÐÐSQLÓï¾ä£¬ÉèÖÃÃüÁîµÄÖ´Ðеȴýʱ¼ä
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/// </summary>
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/// <param name="SQLString"></param>
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/// <param name="Times"></param>
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/// <returns></returns>
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public static int ExecuteSqlByTime(string SQLString, int Times)
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{
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using (SQLiteConnection connection = new SQLiteConnection(connectionString))
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{
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using (SQLiteCommand cmd = new SQLiteCommand(SQLString, connection))
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{
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try
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{
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connection.Open();
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cmd.CommandTimeout = Times;
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int rows = cmd.ExecuteNonQuery();
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return rows;
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}
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catch (System.Data.SQLite.SQLiteException E)
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{
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connection.Close();
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throw new Exception(E.Message);
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}
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}
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}
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}
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/// <summary>
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/// Ö´ÐжàÌõSQLÓï¾ä£¬ÊµÏÖÊý¾Ý¿âÊÂÎñ¡£
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/// </summary>
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/// <param name="SQLStringList">¶àÌõSQLÓï¾ä</param>
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public static bool ExecuteSqlTran(ArrayList SQLStringList)
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{
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bool isSuccess = false;
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using (SQLiteConnection conn = new SQLiteConnection(connectionString))
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{
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conn.Open();
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SQLiteCommand cmd = new SQLiteCommand();
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cmd.Connection = conn;
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cmd.CommandText = "PRAGMA synchronous = OFF;";
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cmd.ExecuteNonQuery();
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SQLiteTransaction tx = conn.BeginTransaction();
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cmd.Transaction = tx;
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try
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{
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for (int n = 0; n < SQLStringList.Count; n++)
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{
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string strsql = SQLStringList[n].ToString();
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if (strsql.Trim().Length > 1)
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{
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cmd.CommandText = strsql;
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cmd.ExecuteNonQuery();
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}
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}
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tx.Commit();
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isSuccess = true;
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}
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catch (System.Data.SQLite.SQLiteException E)
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{
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tx.Rollback();
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isSuccess = false;
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throw new Exception(E.Message);
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}
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}
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return isSuccess;
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}
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/// <summary>
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/// Ö´ÐдøÒ»¸ö´æ´¢¹ý³Ì²ÎÊýµÄµÄSQLÓï¾ä¡£
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/// </summary>
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/// <param name="SQLString">SQLÓï¾ä</param>
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/// <param name="content">²ÎÊýÄÚÈÝ,±ÈÈçÒ»¸ö×Ö¶ÎÊǸñʽ¸´ÔÓµÄÎÄÕ£¬ÓÐÌØÊâ·ûºÅ£¬¿ÉÒÔͨ¹ýÕâ¸ö·½Ê½Ìí¼Ó</param>
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/// <returns>Ó°ÏìµÄ¼Ç¼Êý</returns>
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public static int ExecuteSql(string SQLString, string content)
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{
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using (SQLiteConnection connection = new SQLiteConnection(connectionString))
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{
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SQLiteCommand cmd = new SQLiteCommand(SQLString, connection);
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SQLiteParameter myParameter = new SQLiteParameter("@content", DbType.String);
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myParameter.Value = content;
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cmd.Parameters.Add(myParameter);
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try
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{
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connection.Open();
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int rows = cmd.ExecuteNonQuery();
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return rows;
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}
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catch (System.Data.SQLite.SQLiteException E)
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{
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throw new Exception(E.Message);
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}
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finally
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{
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cmd.Dispose();
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connection.Close();
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}
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}
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}
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/// <summary>
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/// Ö´ÐдøÒ»¸ö´æ´¢¹ý³Ì²ÎÊýµÄµÄSQLÓï¾ä¡£
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/// </summary>
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/// <param name="SQLString">SQLÓï¾ä</param>
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/// <param name="content">²ÎÊýÄÚÈÝ,±ÈÈçÒ»¸ö×Ö¶ÎÊǸñʽ¸´ÔÓµÄÎÄÕ£¬ÓÐÌØÊâ·ûºÅ£¬¿ÉÒÔͨ¹ýÕâ¸ö·½Ê½Ìí¼Ó</param>
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/// <returns>Ó°ÏìµÄ¼Ç¼Êý</returns>
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public static object ExecuteSqlGet(string SQLString, string content)
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{
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using (SQLiteConnection connection = new SQLiteConnection(connectionString))
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{
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SQLiteCommand cmd = new SQLiteCommand(SQLString, connection);
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SQLiteParameter myParameter = new SQLiteParameter("@content", DbType.String);
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myParameter.Value = content;
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cmd.Parameters.Add(myParameter);
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try
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{
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connection.Open();
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object obj = cmd.ExecuteScalar();
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if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
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{
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return null;
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}
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else
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{
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return obj;
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}
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}
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catch (System.Data.SQLite.SQLiteException E)
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{
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throw new Exception(E.Message);
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}
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finally
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{
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cmd.Dispose();
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connection.Close();
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}
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}
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}
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/// <summary>
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/// ÏòÊý¾Ý¿âÀï²åÈëͼÏñ¸ñʽµÄ×Ö¶Î(ºÍÉÏÃæÇé¿öÀàËƵÄÁíÒ»ÖÖʵÀý)
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/// </summary>
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/// <param name="strSQL">SQLÓï¾ä</param>
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/// <param name="fs">ͼÏñ×Ö½Ú,Êý¾Ý¿âµÄ×Ö¶ÎÀàÐÍΪimageµÄÇé¿ö</param>
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/// <returns>Ó°ÏìµÄ¼Ç¼Êý</returns>
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public static int ExecuteSqlInsertImg(string strSQL, byte[] fs)
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{
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using (SQLiteConnection connection = new SQLiteConnection(connectionString))
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{
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SQLiteCommand cmd = new SQLiteCommand(strSQL, connection);
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SQLiteParameter myParameter = new SQLiteParameter("@fs", DbType.Binary);
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myParameter.Value = fs;
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cmd.Parameters.Add(myParameter);
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try
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{
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connection.Open();
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int rows = cmd.ExecuteNonQuery();
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return rows;
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}
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catch (System.Data.SQLite.SQLiteException E)
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{
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throw new Exception(E.Message);
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}
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finally
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{
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cmd.Dispose();
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connection.Close();
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}
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}
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}
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/// <summary>
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/// Ö´ÐÐÒ»Ìõ¼ÆËã²éѯ½á¹ûÓï¾ä£¬·µ»Ø²éѯ½á¹û£¨object£©¡£
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/// </summary>
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/// <param name="SQLString">¼ÆËã²éѯ½á¹ûÓï¾ä</param>
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/// <returns>²éѯ½á¹û£¨object£©</returns>
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public static object GetSingle(string SQLString)
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{
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using (SQLiteConnection connection = new SQLiteConnection(connectionString))
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{
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using (SQLiteCommand cmd = new SQLiteCommand(SQLString, connection))
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{
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try
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{
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connection.Open();
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object obj = cmd.ExecuteScalar();
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if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
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{
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return null;
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}
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else
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{
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return obj;
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}
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}
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catch (System.Data.SQLite.SQLiteException e)
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{
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connection.Close();
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throw new Exception(e.Message);
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}
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}
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}
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}
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/// <summary>
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/// Ö´ÐвéѯÓï¾ä£¬·µ»ØSQLiteDataReader(ʹÓø÷½·¨ÇмÇÒªÊÖ¹¤¹Ø±ÕSQLiteDataReaderºÍÁ¬½Ó)
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/// </summary>
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/// <param name="strSQL">²éѯÓï¾ä</param>
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/// <returns>SQLiteDataReader</returns>
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public static SQLiteDataReader ExecuteReader(string strSQL)
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{
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SQLiteConnection connection = new SQLiteConnection(connectionString);
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SQLiteCommand cmd = new SQLiteCommand(strSQL, connection);
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try
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{
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connection.Open();
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SQLiteDataReader myReader = cmd.ExecuteReader();
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return myReader;
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}
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catch (System.Data.SQLite.SQLiteException e)
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{
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throw new Exception(e.Message);
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}
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//finally //²»ÄÜÔڴ˹رգ¬·ñÔò£¬·µ»ØµÄ¶ÔÏó½«ÎÞ·¨Ê¹ÓÃ
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//{
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// cmd.Dispose();
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// connection.Close();
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//}
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}
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/// <summary>
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/// Ö´ÐвéѯÓï¾ä£¬·µ»ØDataSet
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/// </summary>
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/// <param name="SQLString">²éѯÓï¾ä</param>
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/// <returns>DataSet</returns>
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public static DataSet Query(string SQLString)
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{
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using (SQLiteConnection connection = new SQLiteConnection(connectionString))
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{
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DataSet ds = new DataSet();
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try
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{
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connection.Open();
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SQLiteDataAdapter command = new SQLiteDataAdapter(SQLString, connection);
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command.Fill(ds, "ds");
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}
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catch (System.Data.SQLite.SQLiteException ex)
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{
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throw new Exception(ex.Message);
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}
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return ds;
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}
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}
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public static DataSet Query(string SQLString, string TableName)
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{
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using (SQLiteConnection connection = new SQLiteConnection(connectionString))
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{
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DataSet ds = new DataSet();
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try
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{
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connection.Open();
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SQLiteDataAdapter command = new SQLiteDataAdapter(SQLString, connection);
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command.Fill(ds, TableName);
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}
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catch (System.Data.SQLite.SQLiteException ex)
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{
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throw new Exception(ex.Message);
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}
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return ds;
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}
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}
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/// <summary>
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/// Ö´ÐвéѯÓï¾ä£¬·µ»ØDataSet,ÉèÖÃÃüÁîµÄÖ´Ðеȴýʱ¼ä
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/// </summary>
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/// <param name="SQLString"></param>
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/// <param name="Times"></param>
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/// <returns></returns>
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public static DataSet Query(string SQLString, int Times)
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{
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using (SQLiteConnection connection = new SQLiteConnection(connectionString))
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{
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DataSet ds = new DataSet();
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try
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{
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connection.Open();
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SQLiteDataAdapter command = new SQLiteDataAdapter(SQLString, connection);
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command.SelectCommand.CommandTimeout = Times;
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command.Fill(ds, "ds");
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}
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catch (System.Data.SQLite.SQLiteException ex)
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{
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throw new Exception(ex.Message);
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}
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return ds;
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}
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}
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#endregion
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#region Ö´Ðдø²ÎÊýµÄSQLÓï¾ä
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/// <summary>
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/// Ö´ÐÐSQLÓï¾ä£¬·µ»ØÓ°ÏìµÄ¼Ç¼Êý
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/// </summary>
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/// <param name="SQLString">SQLÓï¾ä</param>
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/// <returns>Ó°ÏìµÄ¼Ç¼Êý</returns>
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public static int ExecuteSql(string SQLString, params SQLiteParameter[] cmdParms)
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{
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using (SQLiteConnection connection = new SQLiteConnection(connectionString))
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{
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using (SQLiteCommand cmd = new SQLiteCommand())
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{
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try
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{
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PrepareCommand(cmd, connection, null, SQLString, cmdParms);
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int rows = cmd.ExecuteNonQuery();
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cmd.Parameters.Clear();
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return rows;
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}
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catch (System.Data.SQLite.SQLiteException E)
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{
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throw new Exception(E.Message);
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}
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}
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}
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}
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/// <summary>
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/// Ö´ÐжàÌõSQLÓï¾ä£¬ÊµÏÖÊý¾Ý¿âÊÂÎñ¡£
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/// </summary>
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/// <param name="SQLStringList">SQLÓï¾äµÄ¹þÏ£±í£¨keyΪsqlÓï¾ä£¬valueÊǸÃÓï¾äµÄSQLiteParameter[]£©</param>
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public static void ExecuteSqlTran(Hashtable SQLStringList)
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{
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using (SQLiteConnection conn = new SQLiteConnection(connectionString))
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{
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conn.Open();
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using (SQLiteTransaction trans = conn.BeginTransaction())
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{
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SQLiteCommand cmd = new SQLiteCommand();
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try
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{
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//Ñ»·
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foreach (DictionaryEntry myDE in SQLStringList)
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{
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string cmdText = myDE.Key.ToString();
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SQLiteParameter[] cmdParms = (SQLiteParameter[])myDE.Value;
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PrepareCommand(cmd, conn, trans, cmdText, cmdParms);
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int val = cmd.ExecuteNonQuery();
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cmd.Parameters.Clear();
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}
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trans.Commit();
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}
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catch (System.Data.SQLite.SQLiteException e)
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{
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trans.Rollback();
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throw new Exception(e.Message);
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}
|
}
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}
|
}
|
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/// <summary>
|
/// Ö´ÐÐÒ»Ìõ¼ÆËã²éѯ½á¹ûÓï¾ä£¬·µ»Ø²éѯ½á¹û£¨object£©¡£
|
/// </summary>
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/// <param name="SQLString">¼ÆËã²éѯ½á¹ûÓï¾ä</param>
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/// <returns>²éѯ½á¹û£¨object£©</returns>
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public static object GetSingle(string SQLString, params SQLiteParameter[] cmdParms)
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{
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using (SQLiteConnection connection = new SQLiteConnection(connectionString))
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{
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using (SQLiteCommand cmd = new SQLiteCommand())
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{
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try
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{
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PrepareCommand(cmd, connection, null, SQLString, cmdParms);
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object obj = cmd.ExecuteScalar();
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cmd.Parameters.Clear();
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if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
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{
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return null;
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}
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else
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{
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return obj;
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}
|
}
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catch (System.Data.SQLite.SQLiteException e)
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{
|
throw new Exception(e.Message);
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}
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}
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}
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}
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/// <summary>
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/// Ö´ÐвéѯÓï¾ä£¬·µ»ØSQLiteDataReader (ʹÓø÷½·¨ÇмÇÒªÊÖ¹¤¹Ø±ÕSQLiteDataReaderºÍÁ¬½Ó)
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/// </summary>
|
/// <param name="strSQL">²éѯÓï¾ä</param>
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/// <returns>SQLiteDataReader</returns>
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public static SQLiteDataReader ExecuteReader(string SQLString, params SQLiteParameter[] cmdParms)
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{
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SQLiteConnection connection = new SQLiteConnection(connectionString);
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SQLiteCommand cmd = new SQLiteCommand();
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try
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{
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PrepareCommand(cmd, connection, null, SQLString, cmdParms);
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SQLiteDataReader myReader = cmd.ExecuteReader();
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cmd.Parameters.Clear();
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return myReader;
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}
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catch (System.Data.SQLite.SQLiteException e)
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{
|
throw new Exception(e.Message);
|
}
|
//finally //²»ÄÜÔڴ˹رգ¬·ñÔò£¬·µ»ØµÄ¶ÔÏó½«ÎÞ·¨Ê¹ÓÃ
|
//{
|
// cmd.Dispose();
|
// connection.Close();
|
//}
|
|
}
|
|
/// <summary>
|
/// Ö´ÐвéѯÓï¾ä£¬·µ»ØDataSet
|
/// </summary>
|
/// <param name="SQLString">²éѯÓï¾ä</param>
|
/// <returns>DataSet</returns>
|
public static DataSet Query(string SQLString, params SQLiteParameter[] cmdParms)
|
{
|
using (SQLiteConnection connection = new SQLiteConnection(connectionString))
|
{
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SQLiteCommand cmd = new SQLiteCommand();
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PrepareCommand(cmd, connection, null, SQLString, cmdParms);
|
using (SQLiteDataAdapter da = new SQLiteDataAdapter(cmd))
|
{
|
DataSet ds = new DataSet();
|
try
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{
|
da.Fill(ds, "ds");
|
cmd.Parameters.Clear();
|
}
|
catch (System.Data.SQLite.SQLiteException ex)
|
{
|
throw new Exception(ex.Message);
|
}
|
return ds;
|
}
|
}
|
}
|
|
public static void PrepareCommand(SQLiteCommand cmd, SQLiteConnection conn,
|
SQLiteTransaction trans, string cmdText, SQLiteParameter[] cmdParms)
|
{
|
if (conn.State != ConnectionState.Open)
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conn.Open();
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cmd.Connection = conn;
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cmd.CommandText = cmdText;
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if (trans != null)
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cmd.Transaction = trans;
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cmd.CommandType = CommandType.Text;//cmdType;
|
if (cmdParms != null)
|
{
|
foreach (SQLiteParameter parameter in cmdParms)
|
{
|
if ((parameter.Direction == ParameterDirection.InputOutput
|
|| parameter.Direction == ParameterDirection.Input) &&
|
(parameter.Value == null))
|
{
|
parameter.Value = DBNull.Value;
|
}
|
cmd.Parameters.Add(parameter);
|
}
|
}
|
}
|
|
#endregion
|
|
#region ²ÎÊýת»»
|
/// <summary>
|
/// ·Å»ØÒ»¸öSQLiteParameter
|
/// </summary>
|
/// <param name="name">²ÎÊýÃû×Ö</param>
|
/// <param name="type">²ÎÊýÀàÐÍ</param>
|
/// <param name="size">²ÎÊý´óС</param>
|
/// <param name="value">²ÎÊýÖµ</param>
|
/// <returns>SQLiteParameterµÄÖµ</returns>
|
public static SQLiteParameter MakeSQLiteParameter(string name,
|
DbType type, int size, object value)
|
{
|
SQLiteParameter parm = new SQLiteParameter(name, type, size);
|
parm.Value = value;
|
return parm;
|
}
|
|
public static SQLiteParameter MakeSQLiteParameter(string name, DbType type, object value)
|
{
|
SQLiteParameter parm = new SQLiteParameter(name, type);
|
parm.Value = value;
|
return parm;
|
}
|
|
#endregion
|
}
|
}
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