请问fileupload控件能够修改默认类型吗？

Question

用fileupload控件，点击按钮后有html,jpg和所有文件,我只想要jpg，请问能改嘛？

Answer 1

protected void Page_Load(object sender, EventArgs e){    if(IsPostBack)    {        Boolean fileOK = false;        String path = Server.MapPath("~/UploadedImages/");        if (FileUpload1.HasFile)         {            String fileExtension =                 System.IO.Path.GetExtension(FileUpload1.FileName).ToLower();            String[] allowedExtensions =                 {".gif", ".png", ".jpeg", ".jpg"};          for (int i = 0; i < allowedExtensions.Length; i++)          {               if (fileExtension == allowedExtensions[i])               {                    fileOK = true;               }          }        }         if (fileOK)        {            try            {                FileUpload1.PostedFile.SaveAs(path                     + FileUpload1.FileName);                Label1.Text = "File uploaded!";            }            catch (Exception ex)            {                Label1.Text = "File could not be uploaded.";            }        }        else        {            Label1.Text = "Cannot accept files of this type.";        }    }}

Answer 2

http://www.cnblogs.com/superfang/archive/2008/06/28/1231842.html