using OfficeOpenXml;
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using OfficeOpenXml.Style;
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using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Data;
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using System.Linq;
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namespace Bro.M071.DBManager
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{
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public class ExcelExportSet
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{
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public List<string> Worksheets { get; set; }
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/// <summary>
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/// Key： Worksheet的名称 Value:Worksheet对应的列名集合(key 为要导出的列名 value 为导出后显示的列名)
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/// </summary>
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public Dictionary<string, Dictionary<string, string>> WorksheetColumns { get; set; }
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public Dictionary<string, DataTable> WorksheetDataTable { get; set; }
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}
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/// <summary>
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/// Excel导出帮助类
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/// </summary>
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public class ExcelExportHelper
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{
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public static string ExcelContentType => "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
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/// <summary>
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/// List转DataTable
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/// </summary>
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/// <typeparam name="T"></typeparam>
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/// <param name="data"></param>
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/// <returns></returns>
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public static DataTable ListToDataTable<T>(List<T> data, Dictionary<string, string> worksheetColumns)
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{
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PropertyDescriptorCollection properties = TypeDescriptor.GetProperties(typeof(T));
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DataTable dataTable = new DataTable();
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Dictionary<string, string> tempColumns = new Dictionary<string, string>();
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foreach (var column in worksheetColumns)
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{
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PropertyDescriptor property = properties.Find(column.Key, true);
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if (property != null)
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{
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dataTable.Columns.Add(column.Value, Nullable.GetUnderlyingType(property.PropertyType) ?? property.PropertyType);
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tempColumns[column.Key] = column.Value;
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}
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}
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object[] values = new object[tempColumns.Count];
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foreach (T item in data)
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{
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for (int i = 0; i < tempColumns.Count; i++)
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{
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PropertyDescriptor property = properties.Find(tempColumns.ElementAt(i).Key, true);
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values[i] = property.GetValue(item);
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}
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dataTable.Rows.Add(values);
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}
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return dataTable;
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}
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/// <summary>
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/// 导出Excel
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/// </summary>
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/// <param name="dataTable">数据源</param>
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/// <param name="worksheet">工作簿Worksheet</param>
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/// <param name="showSrNo">//是否显示行编号</param>
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/// <param name="columnsToTake">要导出的列</param>
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/// <returns></returns>
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public static byte[] ExportExcel(ExcelExportSet excelExportDto, bool showSrNo = false)
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{
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byte[] result = null;
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using (ExcelPackage package = new ExcelPackage())
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{
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foreach (var worksheet in excelExportDto.Worksheets)
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{
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var dataTable = excelExportDto.WorksheetDataTable[worksheet];
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ExcelWorksheet workSheet = package.Workbook.Worksheets.Add($"{worksheet}");
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int startRowFrom = string.IsNullOrEmpty(worksheet) ? 1 : 3; //开始的行
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//是否显示行编号
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if (showSrNo)
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{
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DataColumn dataColumn = dataTable.Columns.Add("#", typeof(int));
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dataColumn.SetOrdinal(0);
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int index = 1;
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foreach (DataRow item in dataTable.Rows)
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{
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item[0] = index;
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index++;
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}
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}
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//Add Content Into the Excel File
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workSheet.Cells["A" + startRowFrom].LoadFromDataTable(dataTable, true);
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// autofit width of cells with small content
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int columnIndex = 1;
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foreach (DataColumn item in dataTable.Columns)
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{
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ExcelRange columnCells = workSheet.Cells[workSheet.Dimension.Start.Row, columnIndex, workSheet.Dimension.End.Row, columnIndex];
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int maxLength = columnCells.Max(cell => cell.Value.ToString().Count());
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if (maxLength < 150)
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{
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workSheet.Column(columnIndex).AutoFit();
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}
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columnIndex++;
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}
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// format header - bold, yellow on black
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using (ExcelRange r = workSheet.Cells[startRowFrom, 1, startRowFrom, dataTable.Columns.Count])
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{
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r.Style.Font.Color.SetColor(System.Drawing.Color.White);
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r.Style.Font.Bold = true;
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r.Style.Fill.PatternType = ExcelFillStyle.Solid;
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r.Style.Fill.BackgroundColor.SetColor(System.Drawing.ColorTranslator.FromHtml("#1fb5ad"));
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}
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// format cells - add borders
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using (ExcelRange r = workSheet.Cells[startRowFrom + 1, 1, startRowFrom + dataTable.Rows.Count, dataTable.Columns.Count])
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{
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r.Style.Border.Top.Style = ExcelBorderStyle.Thin;
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r.Style.Border.Bottom.Style = ExcelBorderStyle.Thin;
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r.Style.Border.Left.Style = ExcelBorderStyle.Thin;
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r.Style.Border.Right.Style = ExcelBorderStyle.Thin;
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r.Style.Border.Top.Color.SetColor(System.Drawing.Color.Black);
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r.Style.Border.Bottom.Color.SetColor(System.Drawing.Color.Black);
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r.Style.Border.Left.Color.SetColor(System.Drawing.Color.Black);
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r.Style.Border.Right.Color.SetColor(System.Drawing.Color.Black);
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}
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if (!string.IsNullOrEmpty(worksheet))
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{
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workSheet.Cells["A1"].Value = worksheet;
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workSheet.Cells["A1"].Style.Font.Size = 20;
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workSheet.InsertColumn(1, 1);
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workSheet.InsertRow(1, 1);
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workSheet.Column(1).Width = 5;
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}
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result = package.GetAsByteArray();
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}
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}
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return result;
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}
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///// <summary>
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///// 导出Excel
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///// </summary>
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///// <typeparam name="T"></typeparam>
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///// <param name="data"></param>
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///// <param name="heading"></param>
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///// <param name="isShowSlNo"></param>
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///// <param name="columnsToTake"></param>
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///// <returns></returns>
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//public static byte[] ExportExcel<T>(List<T> data, string heading = "", bool isShowSlNo = false, params string[] columnsToTake)
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//{
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// ExcelExportSet excelExport = new ExcelExportSet();
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// excelExport.
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// return ExportExcel(ListToDataTable(data), heading, isShowSlNo, columnsToTake);
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//}
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}
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}
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