A way to store div id as string and send it to button click event via javascript

Is there a way I can send my div id to my asp delete button?

div.ID = String.Format("{0}", reader.GetString(0));
div.Attributes.Add("onclick", "return clickTheButton();");

    protected void btnDelete_Click(object sender, EventArgs e)
    {

        //serverside code if confirm was pressed.
  开发者_如何学编程      using (OdbcConnection cn = new OdbcConnection("Driver={MySQL ODBC 3.51 Driver}; Server=localhost; Database=gymwebsite2; User=root; Password=commando;"))
        {
            cn.Open();
            using (OdbcCommand cmd = new OdbcCommand("DELETE FROM WallPosting WHERE idWallPosting = " + id + ")", cn))
            {
                cmd.ExecuteNonQuery();
            }
        }
        //        //PopulateWallPosts();
    }
}

ASP:

    <script type="text/javascript">
    function confirm_delete()
{
    return confirm("Are you sure you want to delete this comment?");
}
function clickTheButton() {
    document.getElementById('<%= btn.ClientID %>').click();
}

</script>
<p>
<asp:Button ID="btn" OnClientClick="return confirm_delete();" OnClick="btnDelete_Click" runat="server" Text="delete"/>

I need to find a way I can send the div id to the button delete so I can use my sql syntax, atm I cant see a way of how to send it.

You want to use window.event.srcElement.id like this:

function clickTheButton() {

var Sender = window.event.srcElement;
alert("the item clicked was " + Sender.id)

}

for a button that looks like:

<input type="button" id="myButton" onclick="clickTheButton();" value="Click Me"/>

you will get an alert that reads: "the item clicked was myButton.

Are you talking about a situation where you have a number of "delete" buttons, e.g. one for each comment, all hooked up to the same btnDelete_Click() event handler?

You can put a CommandArgument on the Button, e.g.:

<asp:Button ID="btn" OnClientClick="return confirm_delete();" OnClick="btnDelete_Click" runat="server" Text="delete" CommandArgument="123" />

And then pick this up in the event handler like so:

protected void btnDelete_Click(object sender, EventArgs e)
{
    string id = ((Button)sender).CommandArgument;
}

Another approach would be to change your ASP button to a HTML button. Wire up an onclick event to the HTML button, and then call javascript function that then hits the server side Web Method.

You may want to re-approach your design, why is the div being selected causing a delete action.

If you want the reference to the actual element, not just its id, you can define your div as:

<div id="myDiv" onClick="btnClickHandler(this)">
    ...
</div>

This will pass the actual div element into your javascript function btnClickHandler:

<script type="text/javascript">
    function btnClickHandler(myDiv)
    {
        // do stuff with the div here
    }
</script>