C#、javaScript 导出Excel的几种方法！

//导出Excel
function excelPrint() {
var date = new Date();
var filename = document.title + '-' + date.toLocaleDateString().toString() + '.xls';
var tempStr = document.getElementById('strtable').outerHTML;
var newWin = window.open();
newWin.document.write(tempStr);
newWin.document.close();
newWin.document.execCommand('saveas', true, filename);
newWin.window.close();
}

//导出Excel
public void ToExcel(DataGrid dg)
{
HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment;filename=" + this.Title + "-" + DateTime.Now.ToShortDateString() + ".xls");  //文件名
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.ms-excel/msword
dg.Page.EnableViewState = false;  //是否导出全部
System.IO.StringWriter tw = new System.IO.StringWriter();
System.Web.UI.HtmlTextWriter hw = new System.Web.UI.HtmlTextWriter(tw);
dg.RenderControl(hw);
HttpContext.Current.Response.Write(tw.ToString());
HttpContext.Current.Response.End();
}

//导出Excel
public void ExportExcle()
{
Aspose.Excel.Excel xlDoc = new Aspose.Excel.Excel();  //需要引用Aspose.Excel.dll，在我的资源有得下载

string filename = "业务数据报表" + DateTime.Now.ToString("yyyyMMddHHmmss") + ".xls";//文件名 + DateTime.Now.ToString("yyyyMMddHHmmss")
string filepath = HttpContext.Current.Server.MapPath(Request.ApplicationPath) + @"\DownloadFile\" + filename;//放置文件地
try
{
string fileTem = HttpContext.Current.Server.MapPath(Request.ApplicationPath) + @"\ExcelTemplate\流程业务数据模板.xls";
xlDoc.Open(fileTem);    //打开模板
Aspose.Excel.Worksheet xSt;
System.Data.DataTable dt = null;
string AppId = "";
for (int i = 1; i <= 10; i++)
{
switch (i)
{
case 1: AppId = "202"; break;
case 2: AppId = "203"; break;
case 3: AppId = "204"; break;
case 4: AppId = "206"; break;
case 5: AppId = "209"; break;
case 6: AppId = "210"; break;
case 7: AppId = "211"; break;
case 8: AppId = "212"; break;
case 9: AppId = "213"; break;
case 10: AppId = "214"; break;
}
xSt = xlDoc.Worksheets[i - 1];
//去读取数据放入xSt
dt = FlowDP.GetBusinessData_WorkOrderQuery(AppId); //根据不同的条件返回DataTable
if (dt != null)
{
int iColumnCnt = dt.Columns.Count;
int iRowCnt = dt.Rows.Count;
for (int m = 0; m < iRowCnt; m++)
{
for (int n = 0; n < iColumnCnt; n++)
{
xSt.Cells[m + 1, Convert.ToByte(n)].PutValue(dt.Rows[m]
.ToString());  //把数据写到Excel
}
}
}
else
{
xSt = null;
}
}
//保存文件
xlDoc.Save(filepath, Aspose.Excel.FileFormatType.Default);

//下载文件
System.IO.FileInfo file = new System.IO.FileInfo(filepath);
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);
Response.Flush();//这个语句必须有，否则就不回弹出保存的对话框
Response.Close();
// 停止页面的执行
Response.End();
}
catch (Exception e)
{
Page.ClientScript.RegisterStartupScript(typeof(System.Web.UI.Page), "script", "alert('" + e.Message + "');", true);
}
finally
{
if (File.Exists(filepath))
{
File.Delete(filepath);   //删除文件
}
}
}