Confirmation box from server side in asp.net

Question

I want to show the confirmation box in asp.net from server side:

I want to call it from server side because I have to take the customer message from server side. I am using the below code

    string str = "Are you sure, you want to Approve this Record?";
        ClientScript.RegisterStartupScript(typeof(Page), "Popup", "return confirm('" + str + "');",true);
// More code ....

Now it is showing the popup and irrespective of what I click, whether "ok" or "Cancel", my code is executing.

Please let me know how can I restrict code to be executed when user select "cancel" in the confirmation box.

Answer 1

Check it out:

CODE BEHIND:

string str = "Are you sure, you want to Approve this Record?";
        this.ClientScript.RegisterStartupScript(typeof(Page), "Popup", "ConfirmApproval('" + str + "');", true);

ASPX:

function ConfirmApproval(objMsg)
    {
        if(confirm(objMsg))
        {
            alert("execute code.");
            return true;
        }    
        else
            return false;    
    }