.Net中导出数据到Excel

   Response.Clear();    
   Response.Buffer=   true;    
   Response.AppendHeader("Content-Disposition","attachment;filename="+DateTime.Now.ToString("yyyyMMdd")+".xls");          
   Response.ContentEncoding=System.Text.Encoding.UTF8;  
   Response.ContentType   =   "application/vnd.ms-excel";  
   this.EnableViewState   =   false;  

System.Web.UI.Control ctl=this.DataGrid1;
//DataGrid1是你在窗体中拖放的控件
HttpContext.Current.Response.AppendHeader("Content-Disposition","attachment;filename=Excel.xls");
HttpContext.Current.Response.Charset ="UTF-8";    
HttpContext.Current.Response.ContentEncoding =System.Text.Encoding.Default;
HttpContext.Current.Response.ContentType ="application/ms-excel";
ctl.Page.EnableViewState =false;   
System.IO.StringWriter  tw = new System.IO.StringWriter() ;
System.Web.UI.HtmlTextWriter hw = new System.Web.UI.HtmlTextWriter (tw);
ctl.RenderControl(hw);
HttpContext.Current.Response.Write(tw.ToString());
HttpContext.Current.Response.End();

public void DGToExcel(System.Web.UI.Control ctl)  
  {
   HttpContext.Current.Response.AppendHeader("Content-Disposition","attachment;filename=Excel.xls");
   HttpContext.Current.Response.Charset ="UTF-8";    
   HttpContext.Current.Response.ContentEncoding =System.Text.Encoding.Default;
   HttpContext.Current.Response.ContentType ="application/ms-excel";
   ctl.Page.EnableViewState =false;   
   System.IO.StringWriter  tw = new System.IO.StringWriter() ;
   System.Web.UI.HtmlTextWriter hw = new System.Web.UI.HtmlTextWriter (tw);
   ctl.RenderControl(hw);
   HttpContext.Current.Response.Write(tw.ToString());
   HttpContext.Current.Response.End();
  }

public  void CreateExcel(DataSet ds,string FileName) 
{
 HttpResponse resp;
 resp = Page.Response;
 resp.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
 resp.AppendHeader("Content-Disposition", "attachment;filename="+FileName);   
 string colHeaders= "", ls_item="";   
 
 //定义表对象与行对象，同时用DataSet对其值进行初始化
 DataTable dt=ds.Tables[0];
 DataRow[] myRow=dt.Select();//可以类似dt.Select("id>10")之形式达到数据筛选目的
        int i=0;
        int cl=dt.Columns.Count;
    
 //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
 for(i=0;i<cl;i++)
 {
 if(i==(cl-1))//最后一列，加n
 {
 colHeaders +=dt.Columns[i].Caption.ToString() +"n";
 }
 else
 {
 colHeaders+=dt.Columns[i].Caption.ToString()+"t";
 }
      
 }
 resp.Write(colHeaders);
 //向HTTP输出流中写入取得的数据信息
   
 //逐行处理数据  
 foreach(DataRow row in myRow)
 {     
 //当前行数据写入HTTP输出流，并且置空ls_item以便下行数据    
 for(i=0;i<cl;i++)
 {
 if(i==(cl-1))//最后一列，加n
 {
 ls_item +=row[i].ToString()+"n";
 }
 else
 {
 ls_item+=row[i].ToString()+"t";
 }
  
 }
 resp.Write(ls_item);
 ls_item="";
    
 }    
 resp.End(); 
 }

public void OutputExcel(DataView dv,string str)
{
   //dv为要输出到Excel的数据，str为标题名称
   GC.Collect();
   Application excel;// = new Application();
   int rowIndex=4;
   int colIndex=1;
 
   _Workbook xBk;
   _Worksheet xSt;
 
   excel= new ApplicationClass();
  
   xBk = excel.Workbooks.Add(true);
   
   xSt = (_Worksheet)xBk.ActiveSheet;
 
   //
   //取得标题
   //
   foreach(DataColumn col in dv.Table.Columns)
   {
    colIndex++;
    excel.Cells[4,colIndex] = col.ColumnName;
    xSt.get_Range(excel.Cells[4,colIndex],excel.Cells[4,colIndex]).HorizontalAlignment = XlVAlign.xlVAlignCenter;//设置标题格式为居中对齐
   }
 
   //
   //取得表格中的数据
   //
   foreach(DataRowView row in dv)
   {
    rowIndex ++;
    colIndex = 1;
    foreach(DataColumn col in dv.Table.Columns)
    {
     colIndex ++;
     if(col.DataType == System.Type.GetType("System.DateTime"))
     {
      excel.Cells[rowIndex,colIndex] = (Convert.ToDateTime(row[col.ColumnName].ToString())).ToString("yyyy-MM-dd");
      xSt.get_Range(excel.Cells[rowIndex,colIndex],excel.Cells[rowIndex,colIndex]).HorizontalAlignment = XlVAlign.xlVAlignCenter;//设置日期型的字段格式为居中对齐
     }
     else
      if(col.DataType == System.Type.GetType("System.String"))
     {
      excel.Cells[rowIndex,colIndex] = "‘"+row[col.ColumnName].ToString();
      xSt.get_Range(excel.Cells[rowIndex,colIndex],excel.Cells[rowIndex,colIndex]).HorizontalAlignment = XlVAlign.xlVAlignCenter;//设置字符型的字段格式为居中对齐
     }
     else
     {
      excel.Cells[rowIndex,colIndex] = row[col.ColumnName].ToString();
     }
    }
   }
   //
   //加载一个合计行
   //
   int rowSum = rowIndex + 1;
   int colSum = 2;
   excel.Cells[rowSum,2] = "合计";
   xSt.get_Range(excel.Cells[rowSum,2],excel.Cells[rowSum,2]).HorizontalAlignment = XlHAlign.xlHAlignCenter;
   //
   //设置选中的部分的颜色
   //
   xSt.get_Range(excel.Cells[rowSum,colSum],excel.Cells[rowSum,colIndex]).Select();
   xSt.get_Range(excel.Cells[rowSum,colSum],excel.Cells[rowSum,colIndex]).Interior.ColorIndex = 19;//设置为浅黄色，共计有56种
   //
   //取得整个报表的标题
   //
   excel.Cells[2,2] = str;
   //
   //设置整个报表的标题格式
   //
   xSt.get_Range(excel.Cells[2,2],excel.Cells[2,2]).Font.Bold = true;
   xSt.get_Range(excel.Cells[2,2],excel.Cells[2,2]).Font.Size = 22;
   //
   //设置报表表格为最适应宽度
   //
   xSt.get_Range(excel.Cells[4,2],excel.Cells[rowSum,colIndex]).Select();
   xSt.get_Range(excel.Cells[4,2],excel.Cells[rowSum,colIndex]).Columns.AutoFit();
   //
   //设置整个报表的标题为跨列居中
   //
   xSt.get_Range(excel.Cells[2,2],excel.Cells[2,colIndex]).Select();
   xSt.get_Range(excel.Cells[2,2],excel.Cells[2,colIndex]).HorizontalAlignment = XlHAlign.xlHAlignCenterAcrossSelection;
   //
   //绘制边框
   //
   xSt.get_Range(excel.Cells[4,2],excel.Cells[rowSum,colIndex]).Borders.LineStyle = 1;
   xSt.get_Range(excel.Cells[4,2],excel.Cells[rowSum,2]).Borders[XlBordersIndex.xlEdgeLeft].Weight = XlBorderWeight.xlThick;//设置左边线加粗
   xSt.get_Range(excel.Cells[4,2],excel.Cells[4,colIndex]).Borders[XlBordersIndex.xlEdgeTop].Weight = XlBorderWeight.xlThick;//设置上边线加粗
   xSt.get_Range(excel.Cells[4,colIndex],excel.Cells[rowSum,colIndex]).Borders[XlBordersIndex.xlEdgeRight].Weight = XlBorderWeight.xlThick;//设置右边线加粗
   xSt.get_Range(excel.Cells[rowSum,2],excel.Cells[rowSum,colIndex]).Borders[XlBordersIndex.xlEdgeBottom].Weight = XlBorderWeight.xlThick;//设置下边线加粗
   //
   //显示效果
   //
   excel.Visible=true;
 
   //xSt.Export(Server.MapPath(".")+""+this.xlfile.Text+".xls",SheetExportActionEnum.ssExportActionNone,Microsoft.Office.Interop.OWC.SheetExportFormat.ssExportHTML);
   xBk.SaveCopyAs(Server.MapPath(".")+""+this.xlfile.Text+".xls");
 
   ds = null;
            xBk.Close(false, null,null);
   
            excel.Quit();
            System.Runtime.InteropServices.Marshal.ReleaseComObject(xBk);
            System.Runtime.InteropServices.Marshal.ReleaseComObject(excel);
    System.Runtime.InteropServices.Marshal.ReleaseComObject(xSt);
            xBk = null;
            excel = null;
   xSt = null;
            GC.Collect();
   string path = Server.MapPath(this.xlfile.Text+".xls");
 
   System.IO.FileInfo file = new System.IO.FileInfo(path);
   Response.Clear();
   Response.Charset="GB2312";
   Response.ContentEncoding=System.Text.Encoding.UTF8;
   // 添加头信息，为"文件下载/另存为"对话框指定默认文件名
   Response.AddHeader("Content-Disposition", "attachment; filename=" + Server.UrlEncode(file.Name));
   // 添加头信息，指定文件大小，让浏览器能够显示下载进度
   Response.AddHeader("Content-Length", file.Length.ToString());
   
   // 指定返回的是一个不能被客户端读取的流，必须被下载
   Response.ContentType = "application/ms-excel";
   
   // 把文件流发送到客户端
   Response.WriteFile(file.FullName);
   // 停止页面的执行
  
   Response.End();
}

   SqlConnection conn=new SqlConnection(System.Configuration.ConfigurationSettings.AppSettings["conn"]);
   SqlDataAdapter da=new SqlDataAdapter("select * from tb1",conn);
   DataSet ds=new DataSet();
   da.Fill(ds,"table1");
   DataTable dt=ds.Tables["table1"];
   string name=System.Configuration.ConfigurationSettings.AppSettings["downloadurl"].ToString()+DateTime.Today.ToString("yyyyMMdd")+new Random(DateTime.Now.Millisecond).Next(10000).ToString()+".csv";//存放到 web.config中downloadurl指定的路径，文件格式为当前日期+4位随机数
   FileStream fs=new FileStream(name,FileMode.Create,FileAccess.Write);
   StreamWriter sw=new StreamWriter(fs,System.Text.Encoding.GetEncoding("gb2312"));
   sw.WriteLine("自动编号,姓名,年龄");
   foreach(DataRow dr in dt.Rows)
   {
    sw.WriteLine(dr["ID"]+","+dr["vName"]+","+dr["iAge"]);
   }
   sw.Close();
   Response.AddHeader("Content-Disposition", "attachment; filename=" + Server.UrlEncode(name));
   Response.ContentType = "application/ms-excel";// 指定返回的是一个不能被客户端读取的流，必须被下载
   Response.WriteFile(name); // 把文件流发送到客户端
   Response.End();

public void Out2Excel(string sTableName,string url)
{
Excel.Application oExcel=new Excel.Application();
Workbooks oBooks;
Workbook oBook;
Sheets oSheets;
Worksheet oSheet;
Range oCells;
string sFile="",sTemplate="";
//
System.Data.DataTable dt=TableOut(sTableName).Tables[0];

sFile=url+"myExcel.xls";
sTemplate=url+"MyTemplate.xls";
//
oExcel.Visible=false;
oExcel.DisplayAlerts=false;
//定义一个新的工作簿
oBooks=oExcel.Workbooks;
oBooks.Open(sTemplate,Type.Missing,Type.Missing,Type.Missing,Type.Missing,Type.Missing,Type.Missing,Type.Missing,Type.Missing,Type.Missing,Type.Missing,Type.Missing,Type.Missing, Type.Missing, Type.Missing);
oBook=oBooks.get_Item(1);
oSheets=oBook.Worksheets;
oSheet=(Worksheet)oSheets.get_Item(1);
//命名该sheet
oSheet.Name="Sheet1";

oCells=oSheet.Cells;
//调用dumpdata过程，将数据导入到Excel中去
DumpData(dt,oCells);
//保存
oSheet.SaveAs(sFile,Excel.XlFileFormat.xlTemplate,Type.Missing,Type.Missing, Type.Missing, Type.Missing, Excel.XlSaveAsAccessMode.xlNoChange, Type.Missing, Type.Missing, Type.Missing);
oBook.Close(false, Type.Missing,Type.Missing);
//退出Excel，并且释放调用的COM资源
oExcel.Quit();

GC.Collect();
KillProcess("Excel");
}

private void KillProcess(string processName)
{
System.Diagnostics.Process myproc= new System.Diagnostics.Process();
//得到所有打开的进程
try
{
foreach (Process thisproc in Process.GetProcessesByName(processName))
{
if(!thisproc.CloseMainWindow())
{
thisproc.Kill();
}
}
}
catch(Exception Exc)
{
throw new Exception("",Exc);
}
}

protected void ExportExcel()
  {
   gridbind();
   if(ds1==null) return;
 
   string saveFileName="";
//   bool fileSaved=false;
   SaveFileDialog saveDialog=new SaveFileDialog();
   saveDialog.DefaultExt ="xls";
   saveDialog.Filter="Excel文件|*.xls";
   saveDialog.FileName ="Sheet1";
   saveDialog.ShowDialog();
   saveFileName=saveDialog.FileName;
   if(saveFileName.IndexOf(":")<0) return; //被点了取消
//   excelapp.Workbooks.Open   (App.path & 工程进度表.xls)
  
   Excel.Application xlApp=new Excel.Application();
   object missing=System.Reflection.Missing.Value;
 

   if(xlApp==null)
   {
    MessageBox.Show("无法创建Excel对象，可能您的机子未安装Excel");
    return;
   }
   Excel.Workbooks workbooks=xlApp.Workbooks;
   Excel.Workbook workbook=workbooks.Add(Excel.XlWBATemplate.xlWBATWorksheet);
   Excel.Worksheet worksheet=(Excel.Worksheet)workbook.Worksheets[1];//取得sheet1
   Excel.Range range;
   
 
   string oldCaption=Title_label .Text.Trim ();
   long totalCount=ds1.Tables[0].Rows.Count;
   long rowRead=0;
   float percent=0;
 
   worksheet.Cells[1,1]=Title_label .Text.Trim ();
   //写入字段
   for(int i=0;i<ds1.Tables[0].Columns.Count;i++)
   {
    worksheet.Cells[2,i+1]=ds1.Tables[0].Columns.ColumnName; 
    range=(Excel.Range)worksheet.Cells[2,i+1];
    range.Interior.ColorIndex = 15;
    range.Font.Bold = true;
 
   }
   //写入数值
   Caption .Visible = true;
   for(int r=0;r<ds1.Tables[0].Rows.Count;r++)
   {
    for(int i=0;i<ds1.Tables[0].Columns.Count;i++)
    {
     worksheet.Cells[r+3,i+1]=ds1.Tables[0].Rows[r];    
    }
    rowRead++;
    percent=((float)(100*rowRead))/totalCount;   
    this.Caption.Text= "正在导出数据["+ percent.ToString("0.00")  +"%]...";
    Application.DoEvents();
   }
   worksheet.SaveAs(saveFileName,missing,missing,missing,missing,missing,missing,missing,missing);
   
   this.Caption.Visible= false;
   this.Caption.Text= oldCaption;
 
   range=worksheet.get_Range(worksheet.Cells[2,1],worksheet.Cells[ds1.Tables[0].Rows.Count+2,ds1.Tables[0].Columns.Count]);
   range.BorderAround(Excel.XlLineStyle.xlContinuous,Excel.XlBorderWeight.xlThin,Excel.XlColorIndex.xlColorIndexAutomatic,null);
  
   range.Borders[Excel.XlBordersIndex.xlInsideHorizontal].ColorIndex = Excel.XlColorIndex.xlColorIndexAutomatic;
   range.Borders[Excel.XlBordersIndex.xlInsideHorizontal].LineStyle =Excel.XlLineStyle.xlContinuous;
   range.Borders[Excel.XlBordersIndex.xlInsideHorizontal].Weight =Excel.XlBorderWeight.xlThin;
 
   if(ds1.Tables[0].Columns.Count>1)
   {
    range.Borders[Excel.XlBordersIndex.xlInsideVertical].ColorIndex=Excel.XlColorIndex.xlColorIndexAutomatic;
    }
   workbook.Close(missing,missing,missing);
   xlApp.Quit();
  }