上传Gridview中的文件，并在完成后显示在同一行中

Question

I am trying to store files from a Gridview upload into a Folder using Asp.net.

This is my markup code to generate Upload column and The button and File Upload control.

  <asp:TemplateField HeaderText="Upload">
        <ItemTemplate>
            <asp:FileUpload ID="FileUpload1" runat="server" EnableViewState="true" AllowMultiple="true" />
            <asp:Button ID="btnUpload" runat="server" CommandName="Upload"  Text="OK" style=" color: #ff0000" OnClick="btnUpload_Click"/> 
        </ItemTemplate>
        </asp:TemplateField>  

I have my codebehind to handle btnUpload_Click as below:

 protected void btnUpload_Click(object sender, GridViewCommandEventArgs e)
{
    Response.Write("File has been passed");
    Button bts = e.CommandSource as Button;
    Response.Write(bts.Parent.Parent.GetType().ToString());
    if (e.CommandName.ToLower() != "upload")
    {
        return;
    }
    FileUpload fu = bts.FindControl("FileUpload4") as FileUpload;//here
    if (fu.HasFile)
    {
        bool upload = true;
        string fleUpload = Path.GetExtension(fu.FileName.ToString());
        if (fleUpload.Trim().ToLower() == ".xls" | fleUpload.Trim().ToLower() == ".xlsx")
        {
            fu.SaveAs(Server.MapPath("~/UpLoadPath/" + fu.FileName.ToString()));
            string uploadedFile = (Server.MapPath("~/UpLoadPath/" + fu.FileName.ToString()));
            //Someting to do?...
        }
        else
        {
            upload = false;
            // Something to do?...
        }
        if (upload)
        {
            // somthing to do?...
        }
    }
    else
    {
        //Something to do?...
    }
} 

I am getting this error:

CS0123: No overload for 'btnUpload_Click' matches delegate 'System.EventHandl

Can somebody please help me?

Answer 1

You're binding both Command and Click event with your button. Your button code should be like this-

  <asp:TemplateField HeaderText="Upload">
        <ItemTemplate>
            <asp:FileUpload ID="FileUpload1" runat="server" EnableViewState="true" AllowMultiple="true" />
            <asp:Button ID="btnUpload" runat="server" CommandName="Upload"  Text="OK" style=" color: #ff0000"/> 
        </ItemTemplate>
        </asp:TemplateField>

and from code behind capture the command not the event. like-

 protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
{
    Response.Write("File has been passed");
    Button bts = e.CommandSource as Button;
    Response.Write(bts.Parent.Parent.GetType().ToString());
    if (e.CommandName.ToLower() != "upload")
    {
        return;
    }
    FileUpload fu = bts.FindControl("FileUpload1") as FileUpload;//here
    if (fu.HasFile)
    {
        bool upload = true;
        string fileName = Path.GetFileName(fu.PostedFile.FileName);
        string fleUpload = Path.GetExtension(fu.PostedFile.FileName);
        if (fleUpload.Trim().ToLower() == ".xls" || fleUpload.Trim().ToLower() == ".xlsx")
        {
            fu.SaveAs(Server.MapPath("~/UpLoadPath/" + fileName));
            string uploadedFile = (Server.MapPath("~/UpLoadPath/" + fileName ));
            //Someting to do?...
        }
        else
        {
            upload = false;
            // Something to do?...
        }
        if (upload)
        {
            // somthing to do?...
        }
    }
    else
    {
        //Something to do?...
    }
} 

above I'm assuming your gridview ID is GridView1 . And another one your File Uploader control's ID was mismatched with your code behind. This should work.