Question

How to stop the page from rendering the .cs code on click of cancel button on javascript confirm box?

I have a button click event and in some IF condition I am asking the user to confirm. Now when the user clicks on OK button, I have to bind the new data in a grid. but if the user clicks on cancel button, it should not refresh the grid with new data.

Question: On click of cancel button on JavaScript confirm box, how can I stop the following code to be executed, or how can I just return/break from JavaScript?

Can anyone please help me out with this? Thanks in advance.

Markup

<asp:Button ID="btnCopy" runat="server" Text="Copy" Enabled="false" OnClick="btnCopy_Click" ValidationGroup="Copy" />

Code

public void btnCopy_Click(object sender, EventArgs e) { 
    if (Convert.ToInt32(hidId.Value) > 0) {
        string scriptString = "<script language='JavaScript'> ";
        scriptString += "if (confirm('Are you sure to proceed?') == false) {return} ";
        scriptString += "</script>";
        Page.RegisterStartupScript("Confirm", scriptString);
        BindDataGrid();
    }
}

Answer 1

You are mixing server and client side code in the same event, it has to be separated:

Script:

function Confirm()
{
    var record=confirm('Are you sure to proceed??');
    if(record == 1)
    {
        return true;
    }
    else if(record == 0)
    {
        return false;
    }
 }

Markup:

<asp:Button ID="btnCopy" runat="server" Text="Copy" Enabled="false" 
    OnClick="btnCopy_Click" OnClientClick='return Confirm();' ValidationGroup="Copy" />

Code-behind:

public void btnCopy_Click(object sender, EventArgs e) { 
    if (Convert.ToInt32(hidId.Value) > 0) {      
        BindDataGrid();
    }
}