How to add a "confirm delete" option in ASP.Net Gridview?

This should do it.

I found it here: http://forums.asp.net/p/1331581/2678206.aspx

<asp:TemplateField ShowHeader="False">    <ItemTemplate>        <asp:ImageButton ID="DeleteButton" runat="server" ImageUrl="~/site/img/icons/cross.png"                    CommandName="Delete" OnClientClick="return confirm('Are you sure you want to delete this event?');"                    AlternateText="Delete" />                   </ItemTemplate></asp:TemplateField>  

If your Gridview used with AutoGenerateDeleteButton="true" , you may convert it to LinkButton:

1. Click GridView Tasks and then Edit Columns.

2. Select Delete in Selected fields, and click on Convert this field into a TemplateField. Then click OK:

3. Now your LinkButton will be generated. You can add OnClientClick event to the LinkButton like this:
   OnClientClick="return confirm('Are you sure you want to delete?'); "

I did this a bit different. In my gridview I set the AutoGenerateDeleteButton="true". To find the delete button I use jQuery and add a click event to the found Anchors.

jQuery("a").filter(function () {        return this.innerHTML.indexOf("Delete") == 0;        }).click(function () { return confirm("Are you sure you want to delete this record?"); });

This is quick and simple for what I need to do. Just be mindful that Every Anchor in the page that displays Delete will be selected by jQuery and will have the event added to it.