Add link buttons to each file uploaded using File upload control


  In my application I have one file upload control. When the user selectes a file to upload and when he clicks on Attach button I need to show him the file name of the file he selected to upload and also show the Remove link button after the file name. In this case I need to generate link button dynamically.

I wrote a code like the following:

protected void btnAttach_ServerClick(object sender, EventArgs e)


string strFileName = MyFile.PostedFile.FileName;string c = System.IO.Path.GetFileName(strFileName);


LinkButton b = new LinkButton();

b.Text = "Remove";

b.ID = "LB_" + b.Text;b.Style.Add("display", "block");




With the above code it is showing only th file name in the listbox it is not showing the Remove button in the listboxlinks list box.

How to generate the link button and and write event when the remove is clicked i have to remove the corresponding  file name from the other listbox.

Thanks in advance.

7/9/2007 4:57:22 PM 72751 articles. 3 followers. Follow

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Hey Kalkumar,


Here is some code i wrote to do something similar, hope it is of help:


<form id="form1" runat="server">
            <asp:Repeater ID="fileRepeater" runat="server" OnItemDataBound="fileRepeater_ItemDataBound">
                            <asp:Label ID="fileNameLable" runat="server"/> <asp:LinkButton ID="removeLinkButton" runat="server" Text="Remove" OnCommand="removeLinkButton_Click"/>
            <hr />
            <asp:FileUpload ID="uploadFile" runat="server" />
            <asp:Button id="uploadButton" Text="Upload File" OnClick="uploadButton_Click" runat="server" Width="105px" />



        protected void Page_Load(object sender, EventArgs e)
            DirectoryInfo di = new DirectoryInfo(Server.MapPath("/images"));
            FileInfo[] rgFiles = di.GetFiles("*.*");

            fileRepeater.DataSource = rgFiles;

        protected void fileRepeater_ItemDataBound(object sender, RepeaterItemEventArgs e)
            if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
                FileInfo fi = (FileInfo)e.Item.DataItem;
                Label fileNameLable = (Label) e.Item.FindControl("fileNameLable");
                LinkButton removeLinkButton = (LinkButton)e.Item.FindControl("removeLinkButton");

                fileNameLable.Text = fi.Name;
                removeLinkButton.CommandArgument = fi.Name;

        protected void removeLinkButton_Click(object sender, CommandEventArgs e)
            FileInfo fi = new FileInfo(Server.MapPath("/images/" + e.CommandArgument.ToString()));

            DirectoryInfo di = new DirectoryInfo(Server.MapPath("/images"));
            FileInfo[] rgFiles = di.GetFiles("*.*");

            fileRepeater.DataSource = rgFiles;

        protected void uploadButton_Click(object sender, EventArgs e)
            uploadFile.SaveAs(Server.MapPath("/images/" + uploadFile.FileName));

            DirectoryInfo di = new DirectoryInfo(Server.MapPath("/images"));
            FileInfo[] rgFiles = di.GetFiles("*.*");

            fileRepeater.DataSource = rgFiles;

You will need to include "System.IO;"




Please click "Mark as Answer" if my reply solved your problem ;)

"Don't worry I code better when I am pissed"
7/9/2007 11:21:43 PM

Hi kalkumar:

When you create dynamic controls on a Web Form, you must create the controls and add them to the controls collection in either the Page_Init event handler or the Page_Load event handler. Otherwise, the controls may not behave as expected.

About how to dynamically create controls, please refer to the page:

But I don't think it is a good choice to add the remove button dynamically.

You'd better add statically and make it invisible if there is no file uploaded. After the file is uploaded, you just make it visible by modifying the Visible property of the Button.

Please have a try.

If you have any problems about it, please feel free to post back.

Techie Zhang
Microsoft Online Community Support
7/11/2007 7:57:59 AM

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