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if (FileUploader1.HasFile)
{
string fileExt = FileUploader1.FileName.Substring(FileUploader1.FileName.LastIndexOf('.'));
fileName = "rename" +fileExt;
string path = Server.MapPath("~/path you want/"); //根文件夹要有权限, 设置ASPNET(XP) 或者是NetWork Services(Server) 读和写权限.
FileUploader1.SaveAs(path + fileName);
}
<asp:FileUpload ID="FileUploader1" runat="server" />
if (FileUploader1.HasFile)
{
string fileExt = txtThumbnail.FileName.Substring(FileUploader1.FileName.LastIndexOf('.'));
fileName = "rename" +fileExt;
string path = Server.MapPath("~/path you want/"); //根文件夹要有权限, 设置ASPNET(XP) 或者是NetWork Services(Server) 读和写权限.
FileUploader1.SaveAs(path + fileName);
}