怎样在web下将DataTable数据导入Excel并显示

Question

//将数据集导到excel 以 XLS 格式里
private void DataSetToExcelXls(DataSet ds) 
{
#region 用例说明
/* 
【输入】 
 sender:       
 e:             
【输出】
 无
【流程定义】
 1、将生成的DataSet的数据导到指定的Execl文件里，并显示出来
【可选流程】
                
【问题】

*/
#endregion

Random rd=new Random(int.Parse(DateTime.Now.ToString("MMddhhmmss")));
string strFileName =DateTime.Now.ToString("yyyyMMdd")+DateTime.Now.Hour+DateTime.Now.Minute+DateTime.Now.Second+txtBeginTime.Text.Trim()+txtFinishTime.Text.Trim()+rd.Next(999999).ToString()+ ".XLS";

//Excel.Application excel= new Excel.ApplicationClass();//Excel.Application();
Excel.Application excel ;
//excel = new Excel.Application();
excel = new Excel.ApplicationClass();
Excel.WorkbookClass oWB;
Excel.Worksheet oSheet;
oWB = (Excel.WorkbookClass)(excel.Workbooks.Add(true));
oSheet = (Excel.Worksheet)oWB.ActiveSheet;

oSheet.Cells[1, 1] =lblReportTime.Text; //合并项
oSheet.Cells[2, 1] = lblReportCount.Text;//合并项
oSheet.Cells[4, 1] = "话机号码" ;//合并项
oSheet.Cells[4, 2] = "月份" ;//合并项
oSheet.Cells[3, 3] = "通话总次数（次）";
oSheet.Cells[3, 7] = "通话总时长（分）";
oSheet.Cells[3,11] = "通话总金额（元）";
oSheet.Cells[4, 3] = "国际";
oSheet.Cells[4, 4] = "国内";
oSheet.Cells[4, 5] = "港澳台";
oSheet.Cells[4, 6] = "合计";
oSheet.Cells[4, 7] = "国际";
oSheet.Cells[4, 8] = "国内";
oSheet.Cells[4, 9] = "港澳台";
oSheet.Cells[4,10] = "合计";
oSheet.Cells[4,11] = "国际";
oSheet.Cells[4,12] = "国内";
oSheet.Cells[4,13] = "港澳台";
oSheet.Cells[4,14] = "合计"; oSheet.get_Range("A1","N4").Font.Size= 9 ;
oSheet.get_Range("A1","N4").Font.Bold = true;
oSheet.get_Range("A1","N4").VerticalAlignment =  Excel.XlVAlign.xlVAlignCenter;
oSheet.get_Range("A1","N4").HorizontalAlignment = Excel.XlHAlign.xlHAlignCenter;

//该范围内设置外面一层边框
oSheet.get_Range("A1","N4").BorderAround(Excel.XlLineStyle.xlContinuous,Excel.XlBorderWeight.xlThin ,Excel.XlColorIndex.xlColorIndexAutomatic,Color.Black.ToArgb()) ; //该范围内设置里面所有单元格的边框
oSheet.get_Range("A1","N4").Borders.Weight = Excel.XlBorderWeight.xlThin ;
oSheet.get_Range("A1","N4").Borders.Color = Color.Black.ToArgb() ;
//范围内单元格添加背景颜色
oSheet.get_Range("A1","N2").Cells.Interior.Color =Color.FromArgb(153,255,204).ToArgb();
oSheet.get_Range("A1","N2").Cells.Interior.Pattern = Excel.XlBackground.xlBackgroundAutomatic ;

oSheet.get_Range("A3","N4").Cells.Interior.Color = Color.LemonChiffon.ToArgb();
oSheet.get_Range("A3","N4").Cells.Interior.Pattern = Excel.XlBackground.xlBackgroundAutomatic ;

DataTable dt =ds.Tables[0];
DataRow dr;
int count=dt.Rows.Count+5;
string strExcelLength = "N"+count.ToString().Trim(); int I,J;
for(I = 5;I< count;I++)
{
dr=dt.Rows[I-5];

for(J = 1;J<(dt.Columns.Count +1) ;J++)
{
oSheet.Cells[I,J] = dr[J-1].ToString().Trim() ;

}

} oSheet.get_Range("A5",strExcelLength).Font.Size= 9 ;
oSheet.get_Range("A5",strExcelLength).Font.Bold = false;
oSheet.get_Range("A5",strExcelLength).VerticalAlignment =  Excel.XlVAlign.xlVAlignCenter;
oSheet.get_Range("A5",strExcelLength).HorizontalAlignment = Excel.XlHAlign.xlHAlignCenter;
//该范围内设置外面一层边框
oSheet.get_Range("A5",strExcelLength).BorderAround(Excel.XlLineStyle.xlContinuous,Excel.XlBorderWeight.xlThin ,Excel.XlColorIndex.xlColorIndexAutomatic,Color.Black.ToArgb()) ; //该范围内设置里面所有单元格的边框
oSheet.get_Range("A5",strExcelLength).Borders.Weight = Excel.XlBorderWeight.xlThin ;
oSheet.get_Range("A5",strExcelLength).Borders.Color = Color.Black.ToArgb() ;
//范围内单元格添加背景颜色
oSheet.get_Range("A5",strExcelLength).Cells.Interior.Color = Color.PaleTurquoise.ToArgb();
oSheet.get_Range("A5",strExcelLength).Cells.Interior.Pattern = Excel.XlBackground.xlBackgroundAutomatic ;
oSheet.get_Range("A1","N1").Merge(true);
oSheet.get_Range("A2","N2").Merge(true); oSheet.get_Range("A3","A4").Merge(true);
oSheet.get_Range("B3","B4").Merge(true);
oSheet.get_Range("C3","F3").Merge(true);
oSheet.get_Range("G3","J3").Merge(true);
oSheet.get_Range("K3","N3").Merge(true);
string path=Server.MapPath(".") + "\\..\\..\\excel-file\\" + strFileName;

oWB.SaveAs(path,Missing.Value,"","",true,false,Excel.XlSaveAsAccessMode.xlNoChange,1,false,Missing.Value,Missing.Value);

//oWB.SaveCopyAs(path);

oWB.Close(false,null,null);
excel.Workbooks.Close();
excel.Quit(); System.Runtime.InteropServices.Marshal.ReleaseComObject (excel);
System.Runtime.InteropServices.Marshal.ReleaseComObject (oWB);
System.Runtime.InteropServices.Marshal.ReleaseComObject (oSheet); oSheet = null;
oWB= null;
excel = null; GC.Collect();

string test="../../excel-file/" + strFileName;
Response.Redirect(test);
}

Answer 1

打开新窗口
Response.Write("<script language='javascript'>window.open(FilePath,'Excel','top=100,left=100,toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,WIDTH=200,HEIGHT=300');
</script>")

Answer 2

To veaven(风林火山):
oWB.SaveAs(path,Missing.Value,"","",true,false,Excel.XlSaveAsAccessMode.xlNoChange,1,false,Missing.Value,Missing.Value);
其中Missing.Value是什么，在什么地方引用了？谢谢，我很菜

Answer 3

Missing.Value 是空参数引用！

Answer 4

导入excel写的太麻烦了，弹出窗口可以！用这个导入     Protected Sub toExcel_Click(ByVal sender As Object, ByVal e As ImageClickEventArgs)
            ToExcel1(tblResults)
        End Sub        Sub ToExcel1(ByVal ctl As System.Web.UI.Control)
            Response.Charset = "GB2312"
            Response.AppendHeader("Content-Disposition", "attachment;filename=totalreport.xls")
            Response.ContentEncoding = System.Text.Encoding.UTF8
            Response.ContentType = "application/ms-excel"            ctl.Page.EnableViewState = False
            Dim tw As System.IO.StringWriter = New System.IO.StringWriter()
            Dim hw As System.Web.UI.HtmlTextWriter = New HtmlTextWriter(tw)            ctl.RenderControl(hw)            Response.Write(tw.ToString())
            Response.End()
        End Sub

Answer 5

这是C#的！
protected void toExcel_Click(object sender,EventArgs e) 
      { 
         ToExcel(parentList); 
      }       private void ToExcel(System.Web.UI.Control ctl) 
      { 
         Response.Charset="GB2312"; 
         Response.AppendHeader("Content-Disposition","attachment;filename=Excel.xls");  
         Response.ContentEncoding = System.Text.Encoding.UTF8; 
         Response.ContentType = "application/ms-excel";          ctl.Page.EnableViewState = false; 
         System.IO.StringWriter tw = new System.IO.StringWriter(); 
         System.Web.UI.HtmlTextWriter hw = new HtmlTextWriter(tw);          ctl.RenderControl(hw);          Response.Write(tw.ToString()); 
         Response.End(); 
      }

Answer 6

为什么执行到
excel = new Excel.ApplicationClass();
时页面报“拒绝访问”错误！