CODEWITHSUNDEEP
asp.netgridviewrepeater
notAnonymousAnymore
notAnonymousAnymore

Reputation: 2687

Finding in which row a Button was clicked in a GridView/Repeater

I am binding a Repeater. Each row (is that the right word?) in the Repeater has a Button and a HiddenField. How do I determine the Value of the HiddenField based on which Button was clicked?

Code behind for Button's OnClick event:

protected void btnButton1_Click(object sender, EventArgs e)
{
    Button btnButton1 = (Button)sender;        
    // how do i get this row's HiddenField Value?
}

edit: the CommandArgument suggestion from Pleun works but I am still having issues. I need to find the row(?) in the Repeater that the Button belongs to as there is also a TextBox in each row and I would need its value. So ideally I want to get that row and go FindControl("TextBox1") etc etc. Sorry, should have stated that in my initial question

Upvotes: 1

Views: 5780

Answers (4)

Hallgeir Engen
Hallgeir Engen

Reputation: 971

My markup code: 

<asp:Repeater ID="RptFiles"  runat="server">
    <HeaderTemplate>
            <table>
        </HeaderTemplate>
        <ItemTemplate>
            <tr>
                  <td>--</td>
                  <td><%#Eval("title")%></td>
                  <td>
                    <asp:FileUpload ID="fuVersion" runat="server" />
                    <asp:Button ID="btnUploadVersion" Text="Last opp" runat="server" OnClick="btnUploadVersion_Click" CommandArgument='<%#Eval("Id") %>' />
                  </td>
                </tr>
    </ItemTemplate>
        <FooterTemplate>
            </table>
    </FooterTemplate>
</asp:Repeater>

My code behind

protected void Upload_Click(object sender, EventArgs e)
{
    Button btn = (Button)sender;
    var documentId = btn.CommandArgument;

    //Get the Repeater Item reference
    RepeaterItem item = btn.NamingContainer as RepeaterItem;

    var fuVersion = (FileUpload)item.FindControl("fuVersion");

    var filename = fuVersion.PostedFile.FileName      
}

Upvotes: 0

Pleun
Pleun

Reputation: 8920

What I like to do is add a CommandArgument to the button. In this code its an imagebutton but the idea is the same. So also no need for an extra hidden field.

<asp:ImageButton ID="btnMail" ImageUrl="~/imgnew/prof/sendlink.png" 
CommandArgument='<%# Eval("id")%>'

And in the _Click event do

 string id = ((ImageButton)sender).CommandArgument;

Update:

If you need all the data, you need a different event. The data in the repeater is available as Item in 

RepeaterCommandEventArgs

in the Command event (RepeaterCommandEventArgs)

for handling the Command event see this example http://www.asp.net/data-access/tutorials/custom-buttons-in-the-datalist-and-repeater-cs or http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.repeatercommandeventargs.aspx

Upvotes: 5

Marcus
Marcus

Reputation: 5447

You can traverse upwards by getting the button's Parent, then doing a FindControl() on that control.

Row parentRow = (Row)((Button)sender).Parent;

var tBox = (System.Web.UI.WebControls.TextBox)parentRow.FindControl("myTextBox")

You may have to play around to see how deep the button is nested and with what control types to get to the appropriate parent.

Upvotes: 0

huMpty duMpty
huMpty duMpty

Reputation: 14460

If you using Repeater you can identify elements in each row in the ItemDataBound.

If you using gridview use RowDataBound

Hope this helps

Upvotes: 0

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