asp.net c# gridview buttons

Question

I'm having trouble getting a gridview's button column to do anything. I'm using a DirectoryInfo object to get the details of a file. I put the filename and the date created into the gridview columns. The third column is a button column. I have set the datakeys(Name, CreationTime), named the button column's commandName to "sendcommand". I want to send the filename to another page. I have this code for the RowCommand event:

protected void gvFiles_RowCommand(object sender, System.Web.UI.WebControls.GridViewCommandEventArgs e)
{

    if (e.CommandName == "sendcommand")
    {

        int index = Convert.ToInt32(e.CommandArgument);

        string fileID = ((GridView)sender).DataKeys[index]["Name"].ToString();
        Response.Redirect("irMain.aspx?@filename=" + fileID); 
    }
}

Nothing happens, except for a postback I think. How do I do this?

<asp:GridView ID="gvFiles" runat="server" Font-Name="Verdana" Font-Names="Verdana" 
        Width="401px" AutoGenerateColumns="False" BackColor="White" 
        BorderColor="Black" BorderStyle="Ridge" BorderWidth="2px" 
        DataKeyNames="Name,CreationTime" 
        >
        <Columns>
            <asp:HyperLinkField AccessibleHeaderText="File Name" 
                DataNavigateUrlFields="Name" DataNavigateUrlFormatString="~\Assets\reports\{0}" 
                DataTextField="Name" HeaderText="File Name" >

                <HeaderStyle BackColor="#0033CC" ForeColor="White" />
            </asp:HyperLinkField>
            <asp:BoundField AccessibleHeaderText="Date" DataField="CreationTime" 
                DataFormatString="{0:d}" HeaderText="Date">
                <HeaderStyle BackColor="Blue" ForeColor="White" />
            </asp:BoundField>

            <asp:ButtonField ButtonType="Button" Text="DO Stuff" CommandName="sendcommand" 
                HeaderText="WHAT?!" />

        </Columns>

        <AlternatingRowStyle BackColor="#6699FF" />

    </asp:GridView>

Can we also see the setup of the gridview itself (the aspx or c# that generates it)? — Norm MacLennan
– Norm MacLennan, Commented Jun 5, 2012 at 21:09
you didn't say you were setting the CommandArgument property to anything? also, is gridview subscribed for this event, and does the debuger hit the breakpoint inside the event? — Nikola Bogdanović
– Nikola Bogdanović, Commented Jun 5, 2012 at 21:12
You're missing the OnRowCommand attribute for your GridView so gvFiles_RowCommand is never getting called. — Norm MacLennan
– Norm MacLennan, Commented Jun 5, 2012 at 21:13

Norm MacLennan · Accepted Answer · 2012-06-05 21:27:24Z

3

You have to add the OnRowCommand attribute to your GridView in the ASPX, otherwise the GridView doesn't know what method to call when you execute a command on it.

AFAIK this is an entirely optional attribute and isn't generated via the designer so you have to add it manually when you want to use it.

answered Jun 5, 2012 at 21:27

Norm MacLennan

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