数据导出到Excel（或Word）源代码大全

在日常工作中，大家都习惯Office作为办公软件，因此，在开发软件的时，常常会有把数据导出到Excel等Office软件的需求。在此，收集一些常用的导出文件的源程序，希望给大家带来方便。（不断更新）

一、DataSet数据集内数据转化为Excel

1. // 作用：把DataSet数据集内数据转化为Excel、Word文件
2. // 描述：这些关于Excel、Word的导出方法，基本可以实现日常须要，其中有些方法可以把数据导出后
3. //       生成Xml格式，再导入数据库！有些屏蔽内容没有去掉，保留下来方便学习参考用之。   
4. // 备注：请引用Office相应COM组件，导出Excel对象的一个方法要调用其中的一些方法和属性。
5. public void DataSetToExcel(DataSet ds,string FileName)
6. {
7.    try
8.    {
9.       //Web页面定义
10.       //System.Web.UI.Page mypage=new System.Web.UI.Page();
12.       HttpResponse resp;
13.       resp=HttpContext.Current.Response;
14.       resp.ContentEncoding=System.Text.Encoding.GetEncoding("GB2312");
15.       resp.AppendHeader("Content-disposition","attachment;filename="+FileName+".xls");
16.       resp.ContentType="application/ms-excel";
18.       //变量定义
19.       string colHeaders=null;
20.       string Is_item=null;
22.       //显示格式定义////////////////
25.       //文件流操作定义
26.       //FileStream fs=new FileStream(FileName,FileMode.Create,FileAccess.Write);
27.       //StreamWriter sw=new StreamWriter(fs,System.Text.Encoding.GetEncoding("GB2312"));
29.       StringWriter sfw=new StringWriter();
30.       //定义表对象与行对象，同时用DataSet对其值进行初始化
31.       System.Data.DataTable dt=ds.Tables[0];
32.       DataRow[] myRow=dt.Select();
33.       int i=0;
34.       int cl=dt.Columns.Count;
36.       //取得数据表各列标题，各标题之间以/t分割，最后一个列标题后加回车符
37.       for(i=0;i<cl;i++)
38.       {
39.          //if(i==(cl-1))  //最后一列，加/n
40.          // colHeaders+=dt.Columns[i].Caption.ToString();
41.          //else
42.          colHeaders+=dt.Columns[i].Caption.ToString()+"/t";
43.       }
44.       sfw.WriteLine(colHeaders);
45.       //sw.WriteLine(colHeaders);
47.       //逐行处理数据
48.       foreach(DataRow row in myRow)
49.       {
50.          //当前数据写入
51.          for(i=0;i<cl;i++)
52.          {
53.           //if(i==(cl-1))
54.           //   Is_item+=row[i].ToString()+"/n";
55.           //else
56.           Is_item+=row[i].ToString()+"/t";
57.          }
58.          sfw.WriteLine(Is_item);
59.          //sw.WriteLine(Is_item);
60.          Is_item=null;
61.       }
62.       resp.Write(sfw);
63.       //resp.Clear();
64.       resp.End();
65.    }
66.    catch(Exception e)
67.    {
68.       throw e;
69.    }
70. }

二、DataSet数据集内数据转化为Excel文件（2）

1. /// <summary>
2. /// ExportFiles 的摘要说明。
3. /// 作用：把DataSet数据集内数据转化为Excel文件
4. /// 描述：导出Excel文件   
5. /// 备注：请引用Office相应COM组件，导出Excel对象的一个方法要调用其中的一些方法和属性。
6. /// </summary>
7. public class ExportFiles
8. {
9.     private string filePath = "";
10.     public ExportFiles(string excel_path)
11.     {
12.         //
13.         // TODO: 在此处添加构造函数逻辑
14.         //
15.         filePath = excel_path;
16.     }
17.     /// <summary>
18.     /// 将指定的Dataset导出到Excel文件
19.     /// </summary>
20.     /// <param name="dt"></param>
21.     /// <returns></returns>
22.     public bool ExportToExcel(System.Data.DataSet ds, string ReportName)
23.     {
24.         if (ds.Tables[0].Rows.Count == 0)
25.         {
26.             MessageBox.Show("数据集为空");
27.         }
28.         Microsoft.Office.Interop.Excel._Application xlapp = new ApplicationClass();
29.         Workbook xlbook = xlapp.Workbooks.Add(true);
30.         Worksheet xlsheet = (Worksheet)xlbook.Worksheets[1];
31.         Range range = xlsheet.get_Range(xlapp.Cells[1, 1], xlapp.Cells[1, ds.Tables[0].Columns.Count]);
32.         range.MergeCells = true;
33.         xlapp.ActiveCell.FormulaR1C1 = ReportName;
34.         xlapp.ActiveCell.Font.Size = 20;
35.         xlapp.ActiveCell.Font.Bold = true;
36.         xlapp.ActiveCell.HorizontalAlignment = Microsoft.Office.Interop.Excel.Constants.xlCenter;
37.         int colIndex = 0;
38.         int RowIndex = 2;
39.         //开始写入每列的标题
40.         foreach (DataColumn dc in ds.Tables[0].Columns)
41.         {
42.             colIndex++;
43.             xlsheet.Cells[RowIndex, colIndex] = dc.Caption;
44.         }
45.         //开始写入内容
46.         int RowCount = ds.Tables[0].Rows.Count;//行数
47.         for (int i = 0; i < RowCount; i++)
48.         {
49.             RowIndex++;
50.             int ColCount = ds.Tables[0].Columns.Count;//列数
51.             for (colIndex = 1; colIndex <= ColCount; colIndex++)
52.             {
53.                 xlsheet.Cells[RowIndex, colIndex] = ds.Tables[0].Rows[i][colIndex - 1];//dg[i, colIndex - 1];
54.                 xlsheet.Cells.ColumnWidth = ds.Tables[0].Rows[i][colIndex - 1].ToString().Length;
55.             }
56.         }
58.         xlbook.Saved = true;
59.         xlbook.SaveCopyAs(filePath);
60.         xlapp.Quit();
61.         GC.Collect();
62.         return true;
63.     }
65.     public bool ExportToExcelOF(System.Data.DataSet ds, string ReportName)
66.     {
67.         if (ds.Tables[0].Rows.Count == 0)
68.         {
69.             MessageBox.Show("数据集为空");
70.         }
71.         string FileName = filePath;
73.         //System.Data.DataTable dt = new System.Data.DataTable();
74.         FileStream objFileStream;
75.         StreamWriter objStreamWriter;
76.         string strLine = "";
77.         objFileStream = new FileStream(FileName, FileMode.OpenOrCreate, FileAccess.Write);
78.         objStreamWriter = new StreamWriter(objFileStream, System.Text.Encoding.Unicode);
80.         strLine = ReportName;
81.         objStreamWriter.WriteLine(strLine);
82.         strLine = "";
84.         for (int i = 0; i < ds.Tables[0].Columns.Count; i++)
85.         {
86.             strLine = strLine + ds.Tables[0].Columns[i].ColumnName.ToString() + "          " + Convert.ToChar(9);
87.         }
88.         objStreamWriter.WriteLine(strLine);
89.         strLine = "";
91.         for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
92.         {
93.             strLine = strLine + (i + 1) + Convert.ToChar(9);
94.             for (int j = 1; j < ds.Tables[0].Columns.Count; j++)
95.             {
96.                 strLine = strLine + ds.Tables[0].Rows[i][j].ToString() + Convert.ToChar(9);
97.             }
98.             objStreamWriter.WriteLine(strLine);
99.             strLine = "";
100.         }
101.         objStreamWriter.Close();
102.         objFileStream.Close();
104.         //Microsoft.Office.Interop.Excel._Application xlapp = new ApplicationClass();
105.         //Workbook xlbook = xlapp.Workbooks.Add(true);
106.         //Worksheet xlsheet = (Worksheet)xlbook.Worksheets[1];
107.         //Range range = xlsheet.get_Range(xlapp.Cells[1, 1], xlapp.Cells[1, ds.Tables[0].Columns.Count]);
108.         //range.EntireColumn.AutoFit();
109.         //xlapp.Quit();
110.         return true;
111.     }    
112. }

三、生成XML然后转换成Excel方式

参考资源：http://www.codeproject.com/office/Excel_Export.asp?df=100&forumid=329437&fr=51 （源程序）
优点：
a. 服务端不用安装Excel程序。
b. 支持一定的Excel文件格式设置，比如字体大小、颜色、合并单元格等。
缺点：
a. 与Excel 2000不兼容：由于Excel 2000不支持XML，所以以这种方法生成的Excel文件可能在Excel2000中不兼容（毕竟目前还有不少用户的电脑装的是Excel 2000）。
b. 可能不支持Excel文件页边距的设置；不支持Excel文件横向、纵向的设置；不支持Excel模板；
c. 编程工作量比较大；
d. 生成的文件本质上是XML文件，需要“另存为xls”才能变成真正的Excel文件。
e. 性能是好是坏还不清楚，目前还没真正在项目中用过。希望有用过此方案的朋友能介绍一下这个方案的性能。

四、导出GridView到Excel

1. //导出GridView到Excel中的关键之处
2. //用法： ToExcel(GVStaff, TextBox1.Text);
4. public static void ToExcel(System.Web.UI.Control ctl,string FileName)
5. {
6.     HttpContext.Current.Response.Charset ="UTF-8";
7.     HttpContext.Current.Response.ContentEncoding =System.Text.Encoding.Default;
8.     HttpContext.Current.Response.ContentType ="application/ms-excel";
9.     HttpContext.Current.Response.AppendHeader("Content-Disposition","attachment;filename="+""+FileName+".xls");
10.     ctl.Page.EnableViewState =false;
11.     System.IO.StringWriter  tw = new System.IO.StringWriter();
12.     HtmlTextWriter hw = new HtmlTextWriter(tw);
13.     ctl.RenderControl(hw);
14.     HttpContext.Current.Response.Write(tw.ToString());
15.     HttpContext.Current.Response.End();
16. }       
17.     
18. 必须有下面这句！否则不会通过！
19. public override void VerifyRenderingInServerForm(Control control)
20. {
21.     // Confirms that an HtmlForm control is rendered for
22. }

五、DataTable导出到Excel

1. using System;
2. using Microsoft.Office.Interop.Excel;
3. using System.Windows.Forms;
4. namespace DongVI
5. {
6. /// <summary>
7. /// DataTable导出到Excel
8. /// 整理:dongVi
9. /// </summary>
10. public class DataTableToExcel
11. {
12.   private DataTableToExcel()
13.   {
15.   }
16.   /// <summary>
17.   /// 导出Excel
18.   /// </summary>
19.   /// <param name="dt">要导出的DataTable</param>
20.   public static void ExportToExcel(System.Data.DataTable dt )
21.   {
22.    if (dt == null) return;
23.   
24.    Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application();
25.    if (xlApp == null)
26.    {
27.     // lblMsg.Text = "无法创建Excel对象，可能您的电脑未安装Excel";
28.     MessageBox.Show( "无法创建Excel对象，可能您的电脑未安装Excel" );
29.     return;
30.    }
31.    System.Windows.Forms.SaveFileDialog saveDia = new SaveFileDialog();
32.    saveDia.Filter = "Excel|*.xls";
33.    saveDia.Title = "导出为Excel文件";
34.    if(saveDia.ShowDialog()== System.Windows.Forms.DialogResult.OK
35.     && !string.Empty.Equals(saveDia.FileName))
36.    {
37.     Microsoft.Office.Interop.Excel.Workbooks workbooks = xlApp.Workbooks;
38.     Microsoft.Office.Interop.Excel.Workbook workbook = workbooks.Add(Microsoft.Office.Interop.Excel.XlWBATemplate.xlWBATWorksheet);
39.     Microsoft.Office.Interop.Excel.Worksheet worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[1];//取得sheet1
40.     Microsoft.Office.Interop.Excel.Range range = null;
41.     long totalCount = dt.Rows.Count;
42.     long rowRead = 0;
43.     float percent = 0;
44.     string fileName = saveDia.FileName;
45.     //写入标题
46.     for (int i = 0; i < dt.Columns.Count; i++)
47.     {
48.      worksheet.Cells[1, i + 1] = dt.Columns[i].ColumnName;
49.      range = (Microsoft.Office.Interop.Excel.Range)worksheet.Cells[1, i + 1];
50.      //range.Interior.ColorIndex = 15;//背景颜色
51.      range.Font.Bold = true;//粗体
52.      range.HorizontalAlignment = Microsoft.Office.Interop.Excel.XlHAlign.xlHAlignCenter;//居中
53.      //加边框
54.      range.BorderAround(Microsoft.Office.Interop.Excel.XlLineStyle.xlContinuous, Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin, Microsoft.Office.Interop.Excel.XlColorIndex.xlColorIndexAutomatic, null);
55.      //range.ColumnWidth = 4.63;//设置列宽
56.      //range.EntireColumn.AutoFit();//自动调整列宽
57.      //r1.EntireRow.AutoFit();//自动调整行高
58.     }
59.     //写入内容
60.     for (int r = 0; r < dt.DefaultView.Count; r++)
61.     {
62.      for (int i = 0; i < dt.Columns.Count; i++)
63.      {
64.       worksheet.Cells[r + 2, i + 1] = dt.DefaultView[r][i];
65.       range = (Microsoft.Office.Interop.Excel.Range)worksheet.Cells[r + 2, i + 1];
66.       range.Font.Size = 9;//字体大小
67.       //加边框
68. range.BorderAround(Microsoft.Office.Interop.Excel.XlLineStyle.xlContinuous, Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin, Microsoft.Office.Interop.Excel.XlColorIndex.xlColorIndexAutomatic, null);
69.       range.EntireColumn.AutoFit();//自动调整列宽
70.      }
71.      rowRead++;
72.      percent = ((float)(100 * rowRead)) / totalCount;
73.      System.Windows.Forms.Application.DoEvents();
74.     }
75.     range.Borders[Microsoft.Office.Interop.Excel.XlBordersIndex.xlInsideHorizontal].Weight = Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin;
76.     if (dt.Columns.Count > 1)
77.     {
78.      range.Borders[Microsoft.Office.Interop.Excel.XlBordersIndex.xlInsideVertical].Weight = Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin;
79.     }
80.     try
81.     {
82.      workbook.Saved = true;
83.      workbook.SaveCopyAs(fileName);
84.     }
85.     catch (Exception ex)
86.     {
87.      //lblMsg.Text = "导出文件时出错,文件可能正被打开！/n" + ex.Message;
88.      MessageBox.Show( "导出文件时出错,文件可能正被打开！/n" + ex.Message );
89.      return;
90.     }
92.     workbooks.Close();
93.     if (xlApp != null)
94.     {
95.      xlApp.Workbooks.Close();
96.      xlApp.Quit();
97.      int generation = System.GC.GetGeneration(xlApp);
98.      System.Runtime.InteropServices.Marshal.ReleaseComObject(xlApp);
99.      xlApp = null;
100.      System.GC.Collect(generation);
101.     }
102.     GC.Collect();//强行销毁
103.     #region 强行杀死最近打开的Excel进程
104.     System.Diagnostics.Process[] excelProc = System.Diagnostics.Process.GetProcessesByName("EXCEL");
105.     System.DateTime startTime = new DateTime();
106.     int m, killId = 0;
107.     for (m = 0; m < excelProc.Length; m++)
108.     {
109.      if (startTime < excelProc[m].StartTime)
110.      {
111.       startTime = excelProc[m].StartTime;
112.       killId = m;
113.      }
114.     }
115.     if (excelProc[killId].HasExited == false)
116.     {
117.      excelProc[killId].Kill();
118.     }
119.     #endregion
120.     MessageBox.Show( "导出成功!" );
121.    }
122.   }
123. }
124. }

六、DataTable导出到excel（2）

1. StringWriter stringWriter = new StringWriter();
2. HtmlTextWriter htmlWriter = new HtmlTextWriter( stringWriter );
3. DataGrid excel = new DataGrid();
4. System.Web.UI.WebControls.TableItemStyle AlternatingStyle = new TableItemStyle();
5. System.Web.UI.WebControls.TableItemStyle headerStyle = new TableItemStyle();
6. System.Web.UI.WebControls.TableItemStyle itemStyle = new TableItemStyle();
7. AlternatingStyle.BackColor = System.Drawing.Color.LightGray;
8. headerStyle.BackColor =System.Drawing.Color.LightGray;
9. headerStyle.Font.Bold = true;
10. headerStyle.HorizontalAlign = System.Web.UI.WebControls.HorizontalAlign.Center;
11. itemStyle.HorizontalAlign = System.Web.UI.WebControls.HorizontalAlign.Center;;
13. excel.AlternatingItemStyle.MergeWith(AlternatingStyle);
14. excel.HeaderStyle.MergeWith(headerStyle);
15. excel.ItemStyle.MergeWith(itemStyle);
16. excel.GridLines = GridLines.Both;
17. excel.HeaderStyle.Font.Bold = true;
18. excel.DataSource = dt.DefaultView;//输出DataTable的内容
19. excel.DataBind();
20. excel.RenderControl(htmlWriter);
21.  
22. string filestr = "d://data//"+filePath;  //filePath是文件的路径
23. int pos = filestr.LastIndexOf( "//");
24. string file = filestr.Substring(0,pos);
25. if( !Directory.Exists( file ) )
26. {
27.   Directory.CreateDirectory(file);
28. }
29. System.IO.StreamWriter sw = new StreamWriter(filestr);
30. sw.Write(stringWriter.ToString());
31. sw.Close();

七、通过SQL直接导出到Excel数据库

1. exec master..xp_cmdshell @# bcp "SELECT au_fname, au_lname FROM pubs..authors ORDER BY au_lname" queryout c:/test.xls -c -S"soa" -U"sa" -P"sa" @#

    注意：参数的大小写，另外这种方法写入数据的时候没有标题。

    关于通过SQL读取EXCEL的方法请参见：http://blog.csdn.net/wonsoft/archive/2008/11/16/3312320.aspx

八、用OleDB 把 DataSet 数据导出到 Excel文件里

1. //dt为数据源（数据表） 
2. //ExcelFileName 为要导出的Ｅｘｃｌｅ文件
3. //ModelFile为模板文件，该文件与数据源中的表一致。否则数据会导出失败。
4. //ModelFile文件里，需要有一张 与 dt.TableName 一致的表，而且字段也要一致。
5. //注明：如果不用ModelFile的话，可以用一个空白Excel文件，不过，要去掉下面创建表的注释，让OleDb自己创建一个空白表。
6. public static string TableToExcelFile(DataTable dt,string ExcelFileName,string ModelFile)
7. {
8.     File.Copy(ModelFile,ExcelFileName);  //复制一个空文件，提供写入数据用
9.    
10.     if(File.Exists(ExcelFileName)==false)
11.     {
12.         return "系统创建临时文件失败，请与系统管理员联系！";
13.     }
15.     if(dt == null)
16.     {
17.         return "DataTable不能为空";
18.     }
20.     int rows = dt.Rows.Count;
22.     int cols = dt.Columns.Count;
23.     StringBuilder sb;
24.     string connString;
26.     if(rows == 0)
27.     {
28.         return "没有数据";
29.     }
31.     sb = new StringBuilder();   
32.     connString="Provider=Microsoft.Jet.OLEDB.4.0;Data Source="+ExcelFileName+";Extended Properties=Excel 8.0;";   
33.    
34.     //生成创建表的脚本
35.     //----sb.Append("DROP TABLE "+dt.TableName);
36.    
37.     /*
38.     sb.Append("CREATE TABLE ");
39.     sb.Append(dt.TableName + " ( ");
40.     for(int i=0;i<cols;i++)
41.     {
42.         if(i < cols - 1)
43.         sb.Append(string.Format("{0} varchar,",dt.Columns[i].ColumnName));
44.         else
45.         sb.Append(string.Format("{0} varchar)",dt.Columns[i].ColumnName));
46.     }   
47.     */
48.    
49.     //return sb.ToString();
51.     OleDbConnection objConn = new OleDbConnection(connString);
52.     OleDbCommand objCmd = new OleDbCommand();
53.     objCmd.Connection = objConn;
54.     //objCmd.CommandText=sb.ToString();
56.     try
57.     {
58.         objConn.Open();
59.         //objCmd.ExecuteNonQuery();
60.     }
61.     catch(Exception e)
62.     {
63.         return "在Excel中创建表失败，错误信息：" + e.Message;
64.     }
66.     sb.Remove(0,sb.Length);
68.     sb.Append("INSERT INTO ");
69.     sb.Append(dt.TableName + " ( ");
71.     for(int i=0;i<cols;i++)
72.     {
73.         if(i < cols - 1)
74.             sb.Append(dt.Columns[i].ColumnName + ",");
75.         else
76.             sb.Append(dt.Columns[i].ColumnName + ") values (");
77.     }
79.     for(int i=0;i<cols;i++)
80.     {
81.         if(i < cols - 1)
82.             sb.Append("@" + dt.Columns[i].ColumnName + ",");
83.         else
84.             sb.Append("@" + dt.Columns[i].ColumnName + ")");
85.     }
87.     //建立插入动作的Command
88.     objCmd.CommandText = sb.ToString();
89.     OleDbParameterCollection param = objCmd.Parameters;
91.     for(int i=0;i<cols;i++)
92.     {
93.         param.Add(new OleDbParameter("@" + dt.Columns[i].ColumnName, OleDbType.VarChar));
94.     }
96.     //遍历DataTable将数据插入新建的Excel文件中
97.     foreach (DataRow row in dt.Rows)
98.     {  
99.         for (int i=0; i<param.Count; i++)
100.         {
101.             param[i].Value = row[i];
102.         }
104.         objCmd.ExecuteNonQuery();
105.     }
107.     return "数据已成功导入Excel";
108. } 
109. //   Trackback: http://tb.blog.csdn.net/TrackBack.aspx?PostId=754176

九、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;
5.     if(fi.Exists)
6.     {
7.          fi.Delete();
8.          //throw new Exception("文件删除失败");    
9.     }
10.     else
11.     {
12.          fi.Create();
13.     }
14.   
15.     string mailto:sqlcon=@%22Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + filePath + ";Extended ProPerties=Excel 8.0;";
16.     OleDbConnection olecon = new OleDbConnection(sqlcon);
17.     OleDbCommand olecmd = new OleDbCommand();
18.     olecmd.Connection = olecon;
19.     olecmd.CommandType = CommandType.Text;
21.     try
22.     {
23.         olecon.Open();
24.            
25.         XmlNode nodec=node.SelectSingleNode("./Method/ShowField");
26.         int ii = 0;
27.         sqlstr = "CREATE TABLE sheet1(";
28.         foreach(XmlNode xnode in nodec.ChildNodes )
29.         {
30.            if(ii == nodec.ChildNodes.Count - 1)
31.            {
32.                if(xnode.Attributes["type"].Value.ToLower() == "int"||xnode.Attributes["type"].Value.ToLower() == "decimal")
33.                {
34.                    sqlstr=sqlstr + xnode.Attributes["displayname"].Value + " number)";      
35.                }
36.                else
37.                {
38.                    sqlstr=sqlstr + xnode.Attributes["displayname"].Value + " text)";
39.                }
40.                // sqlstr=sqlstr + xnode.Attributes["displayname"].Value + " text)";
41.            }
42.            else
43.            {
44.                if(xnode.Attributes["type"].Value.ToLower() == "int"||xnode.Attributes["type"].Value.ToLower() == "decimal")
45.                {
46.                     sqlstr=sqlstr + xnode.Attributes["displayname"].Value + " number,";      
47.                }
48.                else
49.                {
50.                     sqlstr=sqlstr + xnode.Attributes["displayname"].Value + " text,";
51.                }
52.            }
53.            //  sqlstr =sqlstr + xnode.Attributes["displayname"].Value + " text";       
54.            ii++;
55.        }
56.        olecmd.CommandText = sqlstr;
57.        olecmd.ExecuteNonQuery();
58.        for(int i=0;i<ds.Tables[0].Rows.Count;i++)
59.        {
60.            sqlstr = "INSERT INTO sheet1 VALUES(";
61.            int jj=0;
62.            foreach(XmlNode inode in nodec.ChildNodes )
63.            {
64.                 if(jj == nodec.ChildNodes.Count-1)
65.                 {
66.                     if(inode.Attributes["type"].Value.ToLower() == "int"||inode.Attributes["type"].Value.ToLower() == "decimal")
67.                     {
68.                          sqlstr = sqlstr + isnull(ds.Tables[0].Rows[i].ItemArray[jj].ToString()) + ")" ; 
69.                     }
70.                     else
71.                     {
72.                          sqlstr = sqlstr + "'" + isnull(ds.Tables[0].Rows[i].ItemArray[jj].ToString().Replace("'","''")) + "')" ;
73.                     }
74.                 }
75.                 else
76.                 {
77.                     if(inode.Attributes["type"].Value.ToLower() == "int"||inode.Attributes["type"].Value.ToLower() == "decimal")
78.                     {
79.                          sqlstr = sqlstr + isnull(ds.Tables[0].Rows[i].ItemArray[jj].ToString()) + "," ;
80.                     }
81.                     else
82.                     {
83.                          sqlstr = sqlstr + "'" + isnull(ds.Tables[0].Rows[i].ItemArray[jj].ToString().Replace("'","''")) + "'," ;
84.                     }
85.                 }
86.                 jj++;
87.            }
88.            olecmd.CommandText = sqlstr;
89.            olecmd.ExecuteNonQuery();
90.         } 
91.         MessageBox.Show(@"Excel文件：" + filePath + " 导出成功！");
92.     }
93.     catch(Exception ex)
94.     {
95.         MessageBox.Show(ex.Message);
96.     }
97.     finally
98.     {
99.         olecmd.Dispose();
100.         olecon.Close();
101.         olecon.Dispose();
102.     }
103. }
105. // 判断对象为空
106. private static string isnull(string obj)
107. {
108.     if(obj.Length >0)
109.     {
110.      return obj;
111.     }
112.     else
113.     {
114.      return "null";
115.     }
116. }