C# 导出 Excel

 [一篮饭特稀原创，转载请注明出自http://www.cnblogs.com/wanghafan/p/3228240.html]

  1 using System;

  2 using System.Data;

  3 using System.IO;

  4 using System.Windows.Forms;

  5 using Excel = Microsoft.Office.Interop.Excel;

  6 using System.Collections.Generic;

  7 

  8 namespace PlaneExcel

  9 {

 10     static class Export2ExcelAction

 11     {

 12         /// <summary>

 13         /// 单表

 14         /// </summary>

 15         /// <param name="FileName"></param>

 16         /// <param name="dataTable"></param>

 17         /// <param name="SheetName"></param>

 18         /// <param name="form"></param>

 19         public static void Export2Excel(string FileName, DataTable dataTable, string SheetName, System.Windows.Forms.Form form)

 20         {

 21             Excel.Application excelApplication = null;

 22             try

 23             {

 24                 excelApplication = new Excel.Application();

 25             }

 26             catch (Exception ex)

 27             {

 28                 System.Windows.Forms.MessageBox.Show("无法创建Excel对象，可能您的机子未安装Excel...");

 29                 return;

 30             }

 31             excelApplication.DisplayAlerts = false;

 32             Excel.Workbooks workbooks = excelApplication.Workbooks;

 33             Excel.Workbook workbook = workbooks.Add(Excel.XlWBATemplate.xlWBATWorksheet);//建工作簿

 34             Excel.Worksheet TableASheet = (Excel.Worksheet)workbook.Worksheets.Add(Type.Missing, Type.Missing, 1, Type.Missing);

 35             TableASheet.Name = SheetName;

 36             TableASheet.Cells.Borders.LineStyle = Excel.XlLineStyle.xlLineStyleNone;

 37             Excel.Range range = TableASheet.get_Range("A1", Type.Missing);

 38             int ColumnIndex = 1;

 39             foreach (DataColumn dc in dataTable.Columns)

 40             {

 41                 range = TableASheet.get_Range(NunberToChar(ColumnIndex) + 1, Type.Missing);

 42                 range.Value2 = dc.ColumnName;

 43                 ColumnIndex++;

 44             }

 45             int RowIndex = 2;

 46             foreach (DataRow dr in dataTable.Rows)

 47             {

 48                 ColumnIndex = 1;

 49                 foreach (DataColumn dc in dataTable.Columns)

 50                 {

 51                     range = TableASheet.get_Range(NunberToChar(ColumnIndex) + RowIndex, Type.Missing);

 52                     range.Value2 = dr[dc.ColumnName].ToString();

 53                     ColumnIndex++;

 54                 }

 55                 RowIndex++;

 56             }

 57             try

 58             {

 59                 ((Excel.Worksheet)workbook.Sheets.Item["Sheet1"]).Delete();

 60                 workbook.Saved = true;

 61                 workbook.SaveCopyAs(FileName);

 62             }

 63             catch (FileNotFoundException fileEx)

 64             {

 65                 System.Windows.Forms.MessageBox.Show("请查看当前导出的文件是否存在或者正在运行中,\n请重新尝试!", "错误", MessageBoxButtons.OKCancel, MessageBoxIcon.Error);

 66                 return;

 67             }

 68             catch (Exception ex)

 69             {

 70                 System.Windows.Forms.MessageBox.Show("请查看当前导出的文件是否存在或者正在运行中,\n请重新尝试!", "错误", MessageBoxButtons.OKCancel, MessageBoxIcon.Error);

 71                 return;

 72             }

 73             finally

 74             {

 75                 workbook.Close();

 76                 workbooks.Close();

 77                 excelApplication.Quit();

 78                 System.Runtime.InteropServices.Marshal.ReleaseComObject(workbook);

 79                 System.Runtime.InteropServices.Marshal.ReleaseComObject(workbooks);

 80                 System.Runtime.InteropServices.Marshal.ReleaseComObject(excelApplication);

 81                 GC.Collect();    

 82             }

 83 

 84             if (MessageBox.Show("导出成功，是否立即打开?", "导出结果", MessageBoxButtons.OKCancel, MessageBoxIcon.Question, MessageBoxDefaultButton.Button1) == DialogResult.OK)

 85                 System.Diagnostics.Process.Start(FileName);

 86         }

 87         /// <summary>

 88         /// 多表

 89         /// </summary>

 90         /// <param name="FileName"></param>

 91         /// <param name="li_dt"></param>

 92         /// <param name="li_SheetName"></param>

 93         /// <param name="form"></param>

 94         public static void Export2Excel(string FileName, List<DataTable> li_dt, List<string> li_SheetName, System.Windows.Forms.Form form)

 95         {        

 96             Excel.Application excelApplication = null;

 97             try

 98             {

 99                 excelApplication = new Excel.Application();

100             }

101             catch (Exception ex)

102             {

103                 System.Windows.Forms.MessageBox.Show("无法创建Excel对象，可能您的机子未安装Excel...");

104                 return;

105             }

106             excelApplication.DisplayAlerts = false;

107             Excel.Workbooks workbooks = excelApplication.Workbooks;

108             Excel.Workbook workbook = workbooks.Add(Excel.XlWBATemplate.xlWBATWorksheet);            

109             for (int i = 0; i < li_dt.Count; i++)

110             {

111                 Excel.Worksheet TableASheet = (Excel.Worksheet)workbook.Worksheets.Add(Type.Missing, Type.Missing, 1, Type.Missing);

112                 TableASheet.Name = li_SheetName[i];

113                 TableASheet.Cells.Borders.LineStyle = Excel.XlLineStyle.xlLineStyleNone;

114                 Excel.Range range = TableASheet.get_Range("A1", Type.Missing);

115                 int ColumnIndex = 1;

116                 foreach (DataColumn dc in li_dt[i].Columns)

117                 {

118                     range = TableASheet.get_Range(NunberToChar(ColumnIndex) + 1, Type.Missing);

119                     range.Value2 = dc.ColumnName;

120                     ColumnIndex++;

121                 }

122                 int RowIndex = 2;

123                 foreach (DataRow dr in li_dt[i].Rows)

124                 {

125                     ColumnIndex = 1;

126                     foreach (DataColumn dc in li_dt[i].Columns)

127                     {

128                         range = TableASheet.get_Range(NunberToChar(ColumnIndex) + RowIndex, Type.Missing);

129                         range.Value2 = dr[dc.ColumnName].ToString();

130                         ColumnIndex++;

131                     }

132                     RowIndex++;

133                 }

134             }

135             try

136             {

137                 ((Excel.Worksheet)workbook.Sheets.Item["Sheet1"]).Delete();

138                 workbook.Saved = true;

139                 workbook.SaveCopyAs(FileName);

140             }

141             catch (FileNotFoundException fileEx)

142             {

143                 System.Windows.Forms.MessageBox.Show("请查看当前导出的文件是否存在或者正在运行中,\n请重新尝试!", "错误", MessageBoxButtons.OKCancel, MessageBoxIcon.Error);

144                 return;

145             }

146             catch (Exception ex)

147             {

148                 System.Windows.Forms.MessageBox.Show("请查看当前导出的文件是否存在或者正在运行中,\n请重新尝试!", "错误", MessageBoxButtons.OKCancel, MessageBoxIcon.Error);

149                 return;

150             }

151             finally

152             {

153                 workbook.Close();

154                 workbooks.Close();

155                 excelApplication.Quit();

156                 System.Runtime.InteropServices.Marshal.ReleaseComObject(workbook);

157                 System.Runtime.InteropServices.Marshal.ReleaseComObject(workbooks);

158                 System.Runtime.InteropServices.Marshal.ReleaseComObject(excelApplication);

159                 GC.Collect();     

160             }

161 

162             if (MessageBox.Show("导出成功，是否立即打开?", "导出结果", MessageBoxButtons.OKCancel, MessageBoxIcon.Question, MessageBoxDefaultButton.Button1) == DialogResult.OK)

163                 System.Diagnostics.Process.Start(FileName);

164         }

165         public static string NunberToChar(int number)

166         {

167             if (1 <= number && 26 >= number)

168             {

169                 int num = number + 64;

170                 System.Text.ASCIIEncoding asciiEncoding = new System.Text.ASCIIEncoding();

171                 byte[] btNumber = new byte[] { (byte)num };

172                 return asciiEncoding.GetString(btNumber);

173             }

174             else if (number > 26)

175             {

176                 int leftValue = 0;

177                 int rightValue = 0;

178                 leftValue = number / 26;

179                 rightValue = number % 26;

180 

181                 if (number % 26 == 0)

182                 {

183                     leftValue = leftValue - 1;

184                     rightValue = ((number - 1) % 26) + 1;

185                 }

186                 return NunberToChar(leftValue) + NunberToChar(rightValue);

187             }

188             return string.Empty;

189         }

190 

191     }

192 }