ASP.NET导入EXCEL方法汇总

1、由dataset生成
public void CreateExcel(DataSet ds,string typeid,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="";
   int i=0;
   //定义表对象与行对像，同时用DataSet对其值进行初始化
   DataTable dt=ds.Tables[0];
   DataRow[] myRow=dt.Select("");
   // typeid=="1"时导出为EXCEL格式文件；typeid=="2"时导出为XML格式文件
   if(typeid=="1")
    {
    //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     colHeaders+=dt.Columns[i].Caption.ToString()+"\t";
    colHeaders +=dt.Columns[i].Caption.ToString() +"\n";
    //向HTTP输出流中写入取得的数据信息
    resp.Write(colHeaders);
    //逐行处理数据
    foreach(DataRow row in myRow)
     {
     //在当前行中，逐列获得数据，数据之间以\t分割，结束时加回车符\n
     for(i=0;i      ls_item +=row[i].ToString() + "\t";
     ls_item += row[i].ToString() +"\n";
     //当前行数据写入HTTP输出流，并且置空ls_item以便下行数据
     resp.Write(ls_item);
     ls_item="";
    }
   }
   else
    {
    if(typeid=="2")
     {
     //从DataSet中直接导出XML数据并且写到HTTP输出流中
     resp.Write(ds.GetXml());
    }
   }
   //写缓冲区中的数据到HTTP头文件中
   resp.End();
}
2、由datagrid生成
public void ToExcel(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";//image/JPEG;text/HTML;image/GIF;vnd.msexcel/
msword
   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();
}
用法：ToExcel(datagrid1);
3、这个用dataview
public void OutputExcel(DataView dv,string str)
{
   //
   // TODO: 在此处添加构造函数逻辑
   //
                           //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(".")
+"file://"+this.xlfile.Text+".xls",SheetExportActionEnum.ssExportActionNone,Microsoft.Office.Interop.OWC.SheetExportForma
t.ssExportHTML/);
   xBk.SaveCopyAs(Server.MapPath(".")+"file://"+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();
}