How to perform javascript inside C# event

Question

I am inside an event and inside this event I want to have a javascript alert display a message to a user. But I cannot seem to get this to work.

protected void dgvStaff_Deleting(object sender, Infragistics.Web.UI.GridControls.RowDeletingEventArgs e)
        {
            // Code stub
            object test = e.Row.Items[0].Text;
            //ScriptManager.RegisterStartupScript(this, this.GetType(), "alertbox", "ShowPopup('Select a row to rate');", true);
            ScriptManager.RegisterClientScriptBlock(this, this.GetType(), "alertbox", "ShowPopup('Select a row to rate');", true); 
            if (objGatewayFunctions.CheckStaffAssignment(e.Row.Items[0].Text.ToString(), ConfigurationManager.AppSettings.Get("Connection").ToString()) == true)
            {

            }
        }

Any idea what I am doing wrong here?

Answer 1

You can't do that - C# and JavaScript run on different computers and you can't jump between them in the middle of a function.

Normally you delay errors/warnings till page is rendered. To improve user experience also try to do error checking before posting back to server (in addition to server side checks).

Answer 2

You have to wait for the completion of Server execution, then you may able to see the Client side execution in action.

Answer 3

Use this

Response.Write("<script type='text/javascript'>alert('Hello World');</script>");