最近在做一个报表系统的时候，需要把DATASET中的数据导到EXCEL当中，于是在网上找了一遍，发现了好几种方法，本来以为应该差不多，但后来经过一一试用后，发现在性能上真的差别很大，现在就介绍一下，同时有不对的希望可以指正：
 
1． 原理：利用office组件把dataset中的数据填充到excel文件当中。
这里我不贴出全部代码了，只把关键部分贴出来：
         ///<summary>
         ///方法，导出C1TrueDBGrid中的数据到Excel文件
         ///</summary>
         ///<param name="c1grid">C1TrueDBGrid</param>
         ///<param name="FileName">Excel文件名</param>
         public void ExportToExcel(C1.Win.C1TrueDBGrid.C1TrueDBGrid c1grid,string FileName)
         {
              if(FileName.Trim() == "") return;            //验证strFileName是否为空或值无效
 
              int rowscount = c1grid.Splits[0].Rows.Count; //定义表格内数据的行数
              int colscount = c1grid.Columns.Count;        //定义表格内数据的列数
 
              //行数必须大于0
              if (rowscount <= 0)
              {
                   MessageBox.Show("没有数据可供保存","提示",MessageBoxButtons.OK,MessageBoxIcon.Information);
                   return;
              }
 
              //列数必须大于0
              if (colscount <= 0)
              {
                   MessageBox.Show("没有数据可供保存","提示",MessageBoxButtons.OK,MessageBoxIcon.Information);
                   return;
              }
 
              //行数不可以大于65536
              if (rowscount > 65536)
              {
                   MessageBox.Show("数据记录数太多(最多不能超过65536条)，不能保存","提示",MessageBoxButtons.OK,MessageBoxIcon.Information);
                   return;
              }
 
              //列数不可以大于255
              if (colscount > 255)
              {
                   MessageBox.Show("数据记录行数太多，不能保存","提示",MessageBoxButtons.OK,MessageBoxIcon.Information);
                   return;
              }
        
              //将文件保存到工作路径的子目录“/Excel”下，如果路径不存在创建它
              string n_path = Directory.GetCurrentDirectory() + "//Excel";
              if (Directory.Exists(n_path) == false)
              {
                   Directory.CreateDirectory(n_path);
              }
 
              //验证以strFileName命名的文件是否存在，如果存在删除它
              FileInfo fi = new FileInfo(n_path + "//" + FileName + ".xls");
              if(fi.Exists)
              {
                   try
                   {
                       fi.Delete();
                   }
                   catch(Exception fie)
                   {
                       MessageBox.Show(fie.Message,"删除失败", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                       return;
                   }
              }
        
              Excel.ApplicationClass excel = null;
 
              try
              {
                   //显示进度条
                   KP.PublicForm.ProgressBar pb = new PublicForm.ProgressBar("导出进度");
                   pb.Show();
                   pb.Refresh();
 
                  //新建Excel应用，新建Workbook文件
                   excel = new Excel.ApplicationClass ( ) ;
                   Excel.XlSaveAsAccessMode savemode = new Excel.XlSaveAsAccessMode();
                   excel.Application.Workbooks.Add (true) ;
 
                   //向Excel中写入表格的表头
                   int i = 1;
                   for(int c = 0;c < colscount; c++)
                   {
                       if(c1grid.Splits[0].DisplayColumns[c].Visible)
                       {
                            excel.Cells[1,i] = c1grid.Columns[c].Caption;
                            i++;
                       }
                   }
        
                   //向Excel中逐行逐列写入表格中的数据
                   for(int r = 0; r < rowscount; r++)
                   {
                       Application.DoEvents();
                       pb.SetProgressBarValue(r+1, rowscount);
                       if(pb.Cancel)
                       {
                            break;
                       }
 
                       int j = 1;
                       for(int c = 0;c < colscount; c++)
                       {
                            if(c1grid.Splits[0].DisplayColumns[c].Visible)
                            {
                                 excel.Cells[r + 2,j] = c1grid.Columns[c].CellText(r);
                                 j++;
                            }
                       }
                   }
 
                   //向Excel中写入表格的脚
                   if(c1grid.ColumnFooters)
                   {
                       int col = 1;
                       for(int c = 0;c < colscount; c++)
                       {
                            if(c1grid.Splits[0].DisplayColumns[c].Visible)
                            {
                                 if(c1grid.Columns[c].FooterText != null && c1grid.Columns[c].FooterText.Trim() != "")
                                 {
                                     excel.Cells[rowscount + 2,col] = c1grid.Columns[c].FooterText;
                                 }
                                 col++;
                            }
                       }
                   }
 
                   //关闭进度条
                   pb.Close();
 
                   //设置Excel的默认保存路径为当前路径下的Excel子文件夹
                   excel.DefaultFilePath = n_path;
 
                   //保存文件
                   excel.ActiveWorkbook.SaveAs(FileName + ".xls",excel.ActiveWorkbook.FileFormat,"","",excel.ActiveWorkbook.ReadOnlyRecommended,excel.ActiveWorkbook.CreateBackup,savemode,excel.ActiveWorkbook.ConflictResolution,false,"","");
        
              }
              catch(Exception e1)
              {
                   MessageBox.Show(e1.Message, "警告", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                   return;
              }
              finally
              {
                   //关闭Excel应用
                   if(excel != null) excel.Quit();
              }
              MessageBox.Show(FileName + "导出完毕，在" + Application.StartupPath + "//Excel文件夹下","提示", MessageBoxButtons.OK,MessageBoxIcon.Information);
//       }
 
}
 
       总结：这个方法是可以解决问题，但效率最差，3000条长点的record就用了6分钟，晕~~~~
 
2．   原理：利用office组件，同时把dataset的数据导到Clipboard中，然后通过粘贴到excel中。
         Excel.XlSaveAsAccessMode savemode = new Excel.XlSaveAsAccessMode();
                   xlApp.Application.Workbooks.Add (true) ;
                   xlApp.DefaultFilePath = @"c:/";
                   xlApp.ActiveWorkbook.SaveAs("exportExcel.xls",xlApp.ActiveWorkbook.FileFormat,"","",xlApp.ActiveWorkbook.ReadOnlyRecommended,xlApp.ActiveWorkbook.CreateBackup,savemode,xlApp.ActiveWorkbook.ConflictResolution,false,"","","");
        
             
 
 
                   Excel.Workbook xlWorkbook = xlApp.Workbooks.Open(filePath, oMissing, oMissing, oMissing, oMissing, oMissing,
                       oMissing, oMissing, oMissing, oMissing, oMissing, oMissing,
                       oMissing,oMissing,oMissing);
                  
                   Excel.Worksheet xlWorksheet;
 
      
                   // 循环所有DataTable
                   for( int i=0; i<ds.Tables.Count; i++ )
                   {
                       xlWorksheet = (Excel.Worksheet)xlWorkbook.Worksheets.Add(oMissing,oMissing,1,oMissing);
                       // 以TableName作为新加的Sheet页名。
                       xlWorksheet.Name = ds.Tables[i].TableName;
                       // 取出这个DataTable中的所有值,暂存于stringBuffer中。
                       string stringBuffer = "";
                       //向Excel中写入表格的表头
                       if(node != null)
                       {
                            XmlNode nodec=node.SelectSingleNode("./Method/ShowField");
                            int ii = 1;
                            foreach(XmlNode xnode in nodec.ChildNodes )
                            {
                                 xlApp.Cells[1,ii] =xnode.Attributes["displayname"].Value;                               
                                 ii++;
                            }
                      
                           
                            for( int j=0; j<ds.Tables[i].Rows.Count; j++ )
                            {
                                 for( int k=0; k<ds.Tables[i].Columns.Count; k++ )
                                 {
             
                                     stringBuffer += ds.Tables[i].Rows[j][k].ToString();
                                     if( k < ds.Tables[i].Columns.Count - 1 )
                                          stringBuffer += "/t";
                                 }
                                 stringBuffer += "/n";
                            }
                           
                       }
                       else
                       {
                            int ii = 1;
                            for(int c = 0;c<ds.Tables[i].Columns.Count; c++)
                            {
                                 xlApp.Cells[1,ii] = ds.Tables[i].Columns[c].Caption;
                                 ii++;
                            }
                           
                            for( int j=0; j<ds.Tables[i].Rows.Count; j++ )
                            {
                                 for( int k=0; k<ds.Tables[i].Columns.Count; k++ )
                                 {
             
                                     stringBuffer += ds.Tables[i].Rows[j][k].ToString();
                                     if( k < ds.Tables[i].Columns.Count - 1 )
                                          stringBuffer += "/t";
                                 }
                                 stringBuffer += "/n";
                            }
                       }
 
                       System.Windows.Forms.Clipboard.SetDataObject("");
                       // 将stringBuffer放入剪切板。
                       System.Windows.Forms.Clipboard.SetDataObject(stringBuffer);
                       // 选中这个sheet页中的第一个单元格
                       ((Excel.Range)xlWorksheet.Cells[2,1]).Select();
                       // 粘贴！
                       xlWorksheet.Paste(oMissing,oMissing);
                       // 清空系统剪切板。
                       System.Windows.Forms.Clipboard.SetDataObject("");
                  
 
 
                  
                   }
                   // 保存并关闭这个工作簿。
                  
             
 
             
                           
                   xlApp.ActiveWorkbook.Close( Excel.XlSaveAction.xlSaveChanges, oMissing, oMissing );
                   //                 xlWorkbook.Close( Excel.XlSaveAction.xlSaveChanges, oMissing, oMissing );
                   System.Runtime.InteropServices.Marshal.ReleaseComObject(xlWorkbook);
                   xlWorkbook = null;
                   MessageBox.Show(@"Excel文件：C:/exportExcel.xls 导出成功！");
              }
              catch(Exception ex)
              {
                   MessageBox.Show(ex.Message);
              }
              finally
              {
                   // 释放...
                   xlApp.Quit();
                   System.Runtime.InteropServices.Marshal.ReleaseComObject(xlApp);
                   xlApp = null;
                   GC.Collect();
          }
 
       总结：这个方法比上面的方法性能好点，但还是很不好用，比原来的提高了2倍左右。
 
3． 原理：利用OLEDB，以excel为数据库，把dataset中的数据导入到excel文件中

  1. public static void exportToExcelByDataset(string filePath, DataSet ds,XmlNode node)
  2. {
  3. string sqlstr;
  4. if(fi.Exists)
  5. {
  6. fi.Delete();
  7. //     throw new Exception("文件删除失败");
  8. }
  9. else
  10. {
  11. fi.Create();
  12. }
  13. string sqlcon=@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + filePath + ";Extended ProPerties=Excel 8.0;";
  14. OleDbConnection olecon = new OleDbConnection(sqlcon);
  15. OleDbCommand olecmd = new OleDbCommand();
  16. olecmd.Connection = olecon;
  17. olecmd.CommandType = CommandType.Text;
  18. try
  19. {
  20. olecon.Open();
  21. XmlNode nodec=node.SelectSingleNode("./Method/ShowField");
  22. int ii = 0;
  23. sqlstr = "CREATE TABLE sheet1(";
  24. foreach(XmlNode xnode in nodec.ChildNodes )
  25. {
  26. if(ii == nodec.ChildNodes.Count - 1)
  27. {
  28. if(xnode.Attributes["type"].Value.ToLower() == "int"||xnode.Attributes["type"].Value.ToLower() == "decimal")
  29. {
  30. sqlstr=sqlstr + xnode.Attributes["displayname"].Value + " number)";
  31. }
  32. else
  33. {
  34. sqlstr=sqlstr + xnode.Attributes["displayname"].Value + " text)";
  35. }
  36. //      sqlstr=sqlstr + xnode.Attributes["displayname"].Value + " text)";
  37. }
  38. else
  39. {
  40. if(xnode.Attributes["type"].Value.ToLower() == "int"||xnode.Attributes["type"].Value.ToLower() == "decimal")
  41. {
  42. sqlstr=sqlstr + xnode.Attributes["displayname"].Value + " number,";
  43. }
  44. else
  45. {
  46. sqlstr=sqlstr + xnode.Attributes["displayname"].Value + " text,";
  47. }
  48. }
  49. //     sqlstr =sqlstr + xnode.Attributes["displayname"].Value + " text";
  50. ii++;
  51. }
  52. olecmd.CommandText = sqlstr;
  53. olecmd.ExecuteNonQuery();
  54. for(int i=0;i<ds.Tables[0].Rows.Count;i++)
  55. {
  56. sqlstr = "INSERT INTO sheet1 VALUES(";
  57. int jj=0;
  58. foreach(XmlNode inode in nodec.ChildNodes )
  59. {
  60. if(jj == nodec.ChildNodes.Count-1)
  61. {
  62. if(inode.Attributes["type"].Value.ToLower() == "int"||inode.Attributes["type"].Value.ToLower() == "decimal")
  63. {
  64. sqlstr = sqlstr + isnull(ds.Tables[0].Rows[i].ItemArray[jj].ToString()) + ")" ;
  65. }
  66. else
  67. {
  68. sqlstr = sqlstr + "'" + isnull(ds.Tables[0].Rows[i].ItemArray[jj].ToString().Replace("'","''")) + "')" ;
  69. }
  70. }
  71. else
  72. {
  73. if(inode.Attributes["type"].Value.ToLower() == "int"||inode.Attributes["type"].Value.ToLower() == "decimal")
  74. {
  75. sqlstr = sqlstr + isnull(ds.Tables[0].Rows[i].ItemArray[jj].ToString()) + "," ;
  76. }
  77. else
  78. {
  79. sqlstr = sqlstr + "'" + isnull(ds.Tables[0].Rows[i].ItemArray[jj].ToString().Replace("'","''")) + "'," ;
  80. }
  81. }
  82. jj++;
  83. }
  84. olecmd.CommandText = sqlstr;
  85. olecmd.ExecuteNonQuery();
  86. }
  87. MessageBox.Show(@"Excel文件：" + filePath + " 导出成功！");
  88. }
  89. catch(Exception ex)
  90. {
  91. MessageBox.Show(ex.Message);
  92. }
  93. finally
  94. {
  95. olecmd.Dispose();
  96. olecon.Close();
  97. olecon.Dispose();
  98. }
  99. }
  100. /// <summary>
  101. /// change to string "null" if input is null
  102. /// </summary>
  103. /// <param name="obj"></param>
  104. /// <returns></returns>
  105. private static string isnull(string obj)
  106. {
  107. if(obj.Length >0)
  108. {
  109. return obj;
  110. }
  111. else
  112. {
  113. return "null";
  114. }
  115. }
       总结：这个方法是最好的，速度飞快，比上面两种提高不止10倍，而且关键是不需要用到office组 件，所以我正在用着这种方法，客户也满意。当然这个也有它不好的地方，有时候会受到导入的数据不符的异常困扰，而且为了赶时间，代码写的不好，一句话，能 用但要改进的地方很多：）
      

///2007-03-02

最近发现几个导出到EXCEL的方法,这里先记录下来

4.本示例是用于将ListView中的内容倒入到Excel 与常用的逐单元格写不同的是，本例子采用数据写入到range的方法。该方法效率明显较高

  1. Excel.Application app = new Excel.ApplicationClass();
  2. if( app == null)
  3. {
  4. MessageBox.Show("Excel无法启动");
  5. return;
  6. }
  7. app.Visible = true;
  8. Excel.Workbooks wbs = app.Workbooks;
  9. Excel.Workbook wb = wbs.Add(Missing.Value);
  10. Excel.Worksheet ws = (Excel.Worksheet)wb.Worksheets[1];
  11. Excel.Range r = ws.get_Range("A1","H1");
  12. object [] objHeader = {"标题1","标题2","标题3","标题4","标题5","标题6","标题7","标题8"};
  13. r.Value = objHeader;
  14. if (lv.Items.Count >0)
  15. {
  16. r = ws.get_Range("A2",Missing.Value);
  17. object [,] objData = new Object[this.lv.Items.Count,8];
  18. foreach(ListViewItem lvi in lv.Items)
  19. {
  20. objData[lvi.Index,0] = lvi.Text;
  21. objData[lvi.Index,1] = lvi.SubItems[1].Text;
  22. objData[lvi.Index,2] = lvi.SubItems[2].Text;
  23. objData[lvi.Index,3] = lvi.SubItems[3].Text;
  24. objData[lvi.Index,4] = lvi.SubItems[4].Text;
  25. objData[lvi.Index,5] = lvi.SubItems[5].Text;
  26. objData[lvi.Index,6] = lvi.SubItems[6].Text;
  27. objData[lvi.Index,7] = lvi.SubItems[7].Text;
  28. }
  29. r = r.get_Resize(lv.Items.Count,8);
  30. r.Value = objData;
  31. r.EntireColumn.AutoFit();
  32. }
  33. app = null;

5.由XML文件导出为EXCEL文件

目录下kfcccer.xml为原始数据XML文件，点击生成后会在同级目录下生成kfcccer.xls文件

页面代码如下:

  1. @ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" Inherits="_Default" %>
  2. <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
  3. <html xmlns="http://www.w3.org/1999/xhtml" >
  4. <head runat="server">
  5. <title>XML转换Excel演示</title>
  6. </head>
  7. <body>
  8. <form id="form1" runat="server">
  9. <div>
  10. <div>
  11. <asp:Button ID="btnChange" runat="server" Font-Bold="True" Font-Size="18pt" ForeColor="Black"
  12. Height="38px" OnClick="btnChange_Click" Text="开始转换" Width="203px" /></div>
  13. </div>
  14. </form>
  15. </body>
  16. </html>

后台代码:

  1. using System;
  2. using System.Data;
  3. using System.Configuration;
  4. using System.Collections;
  5. using System.Web;
  6. using System.Web.Security;
  7. using System.Web.UI;
  8. using System.Web.UI.WebControls;
  9. using System.Web.UI.WebControls.WebParts;
  10. using System.Web.UI.HtmlControls;
  11. using System.IO;
  12. public partial class _Default : System.Web.UI.Page
  13. {
  14. protected void Page_Load(object sender, EventArgs e)
  15. {
  16. }
  17. protected void btnChange_Click(object sender, EventArgs e)
  18. {
  19. try
  20. {
  21. //要转换的XML文件
  22. string XMLFileName = Path.Combine(Request.PhysicalApplicationPath, "kfcccer.xml");
  23. DataSet dsBook = new DataSet();
  24. dsBook.ReadXml(XMLFileName);
  25. int rows = dsBook.Tables[0].Rows.Count + 1;
  26. int cols = dsBook.Tables[0].Columns.Count;
  27. //将要生成的Excel文件
  28. string ExcelFileName = Path.Combine(Request.PhysicalApplicationPath, "kfcccer.xls");
  29. if (File.Exists(ExcelFileName))
  30. {
  31. File.Delete(ExcelFileName);
  32. }
  33. StreamWriter writer = new StreamWriter(ExcelFileName, false);
  34. writer.WriteLine("<?xml version="1.0"?>");
  35. writer.WriteLine("<?mso-application progid="Excel.Sheet"?>");
  36. writer.WriteLine("<Workbook xmlns="urn:schemas-microsoft-com:office:spreadsheet"");
  37. writer.WriteLine(" xmlns:o="urn:schemas-microsoft-com:office:office"");
  38. writer.WriteLine(" xmlns:x="urn:schemas-microsoft-com:office:excel"");
  39. writer.WriteLine(" xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet"");
  40. writer.WriteLine(" xmlns:html="http://www.w3.org/TR/REC-html40/">");
  41. writer.WriteLine(" <DocumentProperties xmlns="urn:schemas-microsoft-com:office:office">");
  42. writer.WriteLine("  <Author>Automated Report Generator Example</Author>");
  43. writer.WriteLine(string.Format("  <Created>{0}T{1}Z</Created>", DateTime.Now.ToString("yyyy-mm-dd"), DateTime.Now.ToString("HH:MM:SS")));
  44. writer.WriteLine("  <Company>51aspx.com</Company>");
  45. writer.WriteLine("  <Version>11.6408</Version>");
  46. writer.WriteLine(" </DocumentProperties>");
  47. writer.WriteLine(" <ExcelWorkbook xmlns="urn:schemas-microsoft-com:office:excel">");
  48. writer.WriteLine("  <WindowHeight>8955</WindowHeight>");
  49. writer.WriteLine("  <WindowWidth>11355</WindowWidth>");
  50. writer.WriteLine("  <WindowTopX>480</WindowTopX>");
  51. writer.WriteLine("  <WindowTopY>15</WindowTopY>");
  52. writer.WriteLine("  <ProtectStructure>False</ProtectStructure>");
  53. writer.WriteLine("  <ProtectWindows>False</ProtectWindows>");
  54. writer.WriteLine(" </ExcelWorkbook>");
  55. writer.WriteLine(" <Styles>");
  56. writer.WriteLine("  <Style ss:ID="Default" ss:Name="Normal">");
  57. writer.WriteLine("   <Alignment ss:Vertical="Bottom"/>");
  58. writer.WriteLine("   <Borders/>");
  59. writer.WriteLine("   <Font/>");
  60. writer.WriteLine("   <Interior/>");
  61. writer.WriteLine("   <Protection/>");
  62. writer.WriteLine("  </Style>");
  63. writer.WriteLine("  <Style ss:ID="s21">");
  64. writer.WriteLine("   <Alignment ss:Vertical="Bottom" ss:WrapText="1"/>");
  65. writer.WriteLine("  </Style>");
  66. writer.WriteLine(" </Styles>");
  67. writer.WriteLine(" <Worksheet ss:Name="MyReport">");
  68. writer.WriteLine(string.Format("  <Table ss:ExpandedColumnCount="{0}" ss:ExpandedRowCount="{1}" x:FullColumns="1"", cols.ToString(), rows.ToString()));
  69. writer.WriteLine("   x:FullRows="1">");
  70. //生成标题
  71. writer.WriteLine("<Row>");
  72. foreach (DataColumn eachCloumn in dsBook.Tables[0].Columns)
  73. {
  74. writer.Write("<Cell ss:StyleID="s21"><Data ss:Type="String">");
  75. writer.Write(eachCloumn.ColumnName.ToString());
  76. writer.WriteLine("</Data></Cell>");
  77. }
  78. writer.WriteLine("</Row>");
  79. //生成数据记录
  80. foreach (DataRow eachRow in dsBook.Tables[0].Rows)
  81. {
  82. writer.WriteLine("<Row>");
  83. for (int currentRow = 0; currentRow != cols; currentRow++)
  84. {
  85. writer.Write("<Cell ss:StyleID="s21"><Data ss:Type="String">");
  86. writer.Write(eachRow[currentRow].ToString());
  87. writer.WriteLine("</Data></Cell>");
  88. }
  89. writer.WriteLine("</Row>");
  90. }
  91. writer.WriteLine("  </Table>");
  92. writer.WriteLine("  <WorksheetOptions xmlns="urn:schemas-microsoft-com:office:excel">");
  93. writer.WriteLine("   <Selected/>");
  94. writer.WriteLine("   <Panes>");
  95. writer.WriteLine("    <Pane>");
  96. writer.WriteLine("     <Number>3</Number>");
  97. writer.WriteLine("     <ActiveRow>1</ActiveRow>");
  98. writer.WriteLine("    </Pane>");
  99. writer.WriteLine("   </Panes>");
  100. writer.WriteLine("   <ProtectObjects>False</ProtectObjects>");
  101. writer.WriteLine("   <ProtectScenarios>False</ProtectScenarios>");
  102. writer.WriteLine("  </WorksheetOptions>");
  103. writer.WriteLine(" </Worksheet>");
  104. writer.WriteLine(" <Worksheet ss:Name="Sheet2">");
  105. writer.WriteLine("  <WorksheetOptions xmlns="urn:schemas-microsoft-com:office:excel">");
  106. writer.WriteLine("   <ProtectObjects>False</ProtectObjects>");
  107. writer.WriteLine("   <ProtectScenarios>False</ProtectScenarios>");
  108. writer.WriteLine("  </WorksheetOptions>");
  109. writer.WriteLine(" </Worksheet>");
  110. writer.WriteLine(" <Worksheet ss:Name="Sheet3">");
  111. writer.WriteLine("  <WorksheetOptions xmlns="urn:schemas-microsoft-com:office:excel">");
  112. writer.WriteLine("   <ProtectObjects>False</ProtectObjects>");
  113. writer.WriteLine("   <ProtectScenarios>False</ProtectScenarios>");
  114. writer.WriteLine("  </WorksheetOptions>");
  115. writer.WriteLine(" </Worksheet>");
  116. writer.WriteLine("</Workbook>");
  117. writer.Close();
  118. Response.Write("<script language="javascript">" + "alert('" + "转换成功! 转换后的Excel文件名为: kfcccer.xls')" + "</script>");
  119. }
  120. catch (Exception ex)
  121. {
  122. Response.Write("<script language="javascript">" + "alert('" + "操作失败! 出错信息: " + ex.Message + "')" + "</script>");
  123. }
  124. }
  125. }

6.以模版形式导出为EXCEL文件 最近在项目中看到同事的一个导出的解决方案，感觉很不错，以前我如果碰到有些客户要按某些格式把数据导出为EXCEL时，就会感觉很麻烦，有段时间会用水 晶报表导出EXCEL的形式来做，但效果很不好，有些控件会提供对应的方法，但这不是我们这些人所喜欢的，我喜欢能自己编，而不喜欢给人已经封装好的东 西，除非他提供原代码也可以，呵呵。其实这个方案说起来很简单，就是先做好一个EXCEL模版，然后用代码把对应的数据填进去，这样就可以很好的满足客户 的按格式导出的需求，而且还可以让客户来提供模版，这样效果更佳，下面就贴些关键代码：

  1. ApplicationClass oExcel = null;
  2. Workbook wb = null;
  3. Sheets sheets = null;
  4. _Worksheet worksheet = null;
  5. Range range = null;
  6. 。。。
  7. public void showBookingData(DataSet ds)
  8. {
  9. showBrHeard(ds.Tables["BR_HEAD"]);
  10. showReference(ds.Tables["BR_REFERENCE"]);
  11. showBrConta(ds.Tables["BR_CONTAINER"]);
  12. showBrCargo(ds.Tables["BR_CARGO"]);
  13. showBrParties(ds.Tables["BR_PARTIES"]);
  14. showBrLocation(ds.Tables["BR_LOCATION"]);
  15. showBrDoor(ds.Tables["BR_DOOR"]);
  16. }
  17. #region 显示Booking数据
  18. private void showBrHeard(System.Data.DataTable dt)
  19. {
  20. if (dt.Rows.Count > 0)
  21. {
  22. DataRow dRow = dt.Rows[0];
  23. if (bkType != "temp")
  24. {
  25. this.range = this.worksheet.get_Range("A2", Type.Missing);
  26. this.range.Value2 = "'"+dRow["CMC_BR_NUMBER"].ToString();
  27. }
  28. this.range = this.worksheet.get_Range("G2", Type.Missing);
  29. this.range.Value2 = Utility.GetCarrier(dRow["SCAC_CODE"].ToString());
  30. this.range = this.worksheet.get_Range("F11", Type.Missing);
  31. String tfc = dRow["TRAFFIC_MODE"].ToString();
  32. this.range.Value2 = Utility.GetTrafficById(Convert.ToDecimal(tfc));
  33. String drm = dRow["PICKUP_DELIVERY"].ToString();
  34. this.range = this.worksheet.get_Range("H11", Type.Missing);
  35. this.range.Value2 = Utility.GetDragModeById(Convert.ToDecimal(drm)).ToUpper();
  36. if (dRow["VESSEL_NAME"].ToString().Trim().Length != 0)
  37. {
  38. this.range = this.worksheet.get_Range("A23", Type.Missing);
  39. this.range.Value2 = dRow["VESSEL_NAME"].ToString() + "/" + dRow["VESSEL_VOYAGE"].ToString();
  40. }
  41. else
  42. {
  43. if (dRow["EST_DEPARTDATE"].ToString().Trim().Length != 0)
  44. {
  45. this.range = this.worksheet.get_Range("D23", Type.Missing);
  46. this.range.Value2 = Convert.ToDateTime(dRow["EST_DEPARTDATE"]).ToString("yyyy-MM-dd");
  47. }
  48. else if (dRow["EST_ARRIVDATE"].ToString().Trim().Length != 0)
  49. {
  50. this.range = this.worksheet.get_Range("C23", Type.Missing);
  51. this.range.Value2 = Convert.ToDateTime(dRow["EST_ARRIVDATE"]).ToString("yyyy-MM-dd");
  52. }
  53. }
  54. writeStrDate("A", 41, dRow["REMARK"].ToString() + "/n");
  55. if (bkType != "temp")
  56. {
  57. if (dRow["BR_NUMBER"] != null && dRow["BR_NUMBER"].ToString() != "")
  58. {
  59. strRN += "Booking No." + dRow["BR_NUMBER"].ToString() + "/n";
  60. }
  61. }
  62. if (dRow["RATE_REFNO"] != null && dRow["RATE_REFNO"].ToString() != "")
  63. {
  64. strRN += "Contact No." + dRow["RATE_REFNO"].ToString() + "/n";
  65. }
  66. }
  67. }
  68. 。。。。。。

做法简单，但效果很好。唯一缺点就是速度比较慢，而且受限制比较多。

参考地址:http://www.cnblogs.com/kfcccer/archive/2007/05/20/753441.html

7.按XML定义格式把DATASET导出EXCEL    这个方法我没用过,是在CSDN上看到的,主要需求是说在DATESET导出为EXCEL时,需要对其中的数据进行定义,不然导出后与现有格式对不上,比 如时间的,导出后会和原来的数据有出入等等一类的问题.   我感觉其实和第五个比较相近,但因为最近比较忙.我也没时间要验证,如果谁用了希望可以反馈给我,谢谢了.下面是代码:

private static void DataSetExportToExcel(DataSet source, string fileName)

{

System.IO.StreamWriter excelDoc;

excelDoc = new System.IO.StreamWriter(fileName);

const string startExcelXML = @"<xml version> <Workbook " +

"xmlns=/"urn:schemas-microsoft-com:office:spreadsheet/" " +

" xmlns:o=/"urn:schemas-microsoft-com:office:office/"  " +

"xmlns:x=/"urn:schemas-    microsoft-com:office:" +

"excel/"  xmlns:ss=/"urn:schemas-microsoft-com:" +

"office:spreadsheet/">  <Styles>  " +

"<Style ss:ID=/"Default/" ss:Name=/"Normal/">  " +

"<Alignment ss:Vertical=/"Bottom/"/>  <Borders/>" +

"  <Font/>  <Interior/>  <NumberFormat/>" +

"  <Protection/>  </Style>  " +

"<Style ss:ID=/"BoldColumn/">  <Font " +

"x:Family=/"Swiss/" ss:Bold=/"1/"/>  </Style>  " +

"<Style     ss:ID=/"StringLiteral/">  <NumberFormat" +

" ss:Format=/"@/"/>  </Style>  <Style " +

"ss:ID=/"Decimal/">  <NumberFormat " +

"ss:Format=/"0.0000/"/>  </Style>  " +

"<Style ss:ID=/"Integer/">  <NumberFormat " +

"ss:Format=/"0/"/>  </Style>  <Style " +

"ss:ID=/"DateLiteral/">  <NumberFormat " +

"ss:Format=/"mm/dd/yyyy;@/"/>  </Style>  " +

"</Styles>  ";

const string endExcelXML = "</Workbook>";

int rowCount = 0;

int sheetCount = 1;

excelDoc.Write(startExcelXML);

excelDoc.Write("<Worksheet ss:Name=/"Sheet" + sheetCount + "/">");

excelDoc.Write("<Table>");

excelDoc.Write("<Row>");

for (int x = 0; x < source.Tables[0].Columns.Count; x++)

{

excelDoc.Write("<Cell ss:StyleID=/"BoldColumn/"><Data ss:Type=/"String/">");

excelDoc.Write(source.Tables[0].Columns[x].ColumnName);

excelDoc.Write("</Data></Cell>");

}

excelDoc.Write("</Row>");

foreach (DataRow x in source.Tables[0].Rows)

{

rowCount++;

//if the number of rows is > 64000 create a new page to continue output

if (rowCount == 64000)

{

rowCount = 0;

sheetCount++;

excelDoc.Write("</Table>");

excelDoc.Write(" </Worksheet>");

excelDoc.Write("<Worksheet ss:Name=/"Sheet" + sheetCount + "/">");

excelDoc.Write("<Table>");

}

excelDoc.Write("<Row>"); //ID=" + rowCount + "

for (int y = 0; y < source.Tables[0].Columns.Count; y++)

{

System.Type rowType;

rowType = x[y].GetType();

switch (rowType.ToString())

{

case "System.String":

string XMLstring = x[y].ToString();

XMLstring = XMLstring.Trim();

XMLstring = XMLstring.Replace("&", "&");

XMLstring = XMLstring.Replace(">", ">");

XMLstring = XMLstring.Replace("<", "<");

excelDoc.Write("<Cell ss:StyleID=/"StringLiteral/">" +

"<Data ss:Type=/"String/">");

excelDoc.Write(XMLstring);

excelDoc.Write("</Data></Cell>");

break;

case "System.DateTime":

//Excel has a specific Date Format of YYYY-MM-DD followed by

//the letter 'T' then hh:mm:sss.lll Example 2005-01-31T24:01:21.000

//The Following Code puts the date stored in XMLDate

//to the format above

DateTime XMLDate = (DateTime)x[y];

string XMLDatetoString = ""; //Excel Converted Date

XMLDatetoString = XMLDate.Year.ToString() +

"-" +

(XMLDate.Month < 10 ? "0" +

XMLDate.Month.ToString() : XMLDate.Month.ToString()) +

"-" +

(XMLDate.Day < 10 ? "0" +

XMLDate.Day.ToString() : XMLDate.Day.ToString()) +

"T" +

(XMLDate.Hour < 10 ? "0" +

XMLDate.Hour.ToString() : XMLDate.Hour.ToString()) +

":" +

(XMLDate.Minute < 10 ? "0" +

XMLDate.Minute.ToString() : XMLDate.Minute.ToString()) +

":" +

(XMLDate.Second < 10 ? "0" +

XMLDate.Second.ToString() : XMLDate.Second.ToString()) +

".000";

excelDoc.Write("<Cell ss:StyleID=/"DateLiteral/">" +

"<Data ss:Type=/"DateTime/">");

excelDoc.Write(XMLDatetoString);

excelDoc.Write("</Data></Cell>");

break;

case "System.Boolean":

excelDoc.Write("<Cell ss:StyleID=/"StringLiteral/">" +

"<Data ss:Type=/"String/">");

excelDoc.Write(x[y].ToString());

excelDoc.Write("</Data></Cell>");

break;

case "System.Int16":

case "System.Int32":

case "System.Int64":

case "System.Byte":

excelDoc.Write("<Cell ss:StyleID=/"Integer/">" +

"<Data ss:Type=/"Number/">");

excelDoc.Write(x[y].ToString());

excelDoc.Write("</Data></Cell>");

break;

case "System.Decimal":

case "System.Double":

excelDoc.Write("<Cell ss:StyleID=/"Decimal/">" +

"<Data ss:Type=/"Number/">");

excelDoc.Write(x[y].ToString());

excelDoc.Write("</Data></Cell>");

break;

case "System.DBNull":

excelDoc.Write("<Cell ss:StyleID=/"StringLiteral/">" +

"<Data ss:Type=/"String/">");

excelDoc.Write("");

excelDoc.Write("</Data></Cell>");

break;

default:

throw (new Exception(rowType.ToString() + " not handled."));

}

}

excelDoc.Write("</Row>");

}

excelDoc.Write("</Table>");

excelDoc.Write(" </Worksheet>");

excelDoc.Write(endExcelXML);

excelDoc.Close();

}

原文转自：http://blog.csdn.net/simonllf/article/details/1441672

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