Question

I have a Search feature. if the search string is empty and user clicks “GO” then the postback of the gridview shouldn’t happen and the alert (as mentioned in below code) should get fired up.

My gridview is in update panel. Below is the logic that i have written but it doesn’t works.

 protected void btnGo_Click(object sender, EventArgs e)
        {
            if (!txtSearchString.Text.Equals(string.Empty))
            {
                BinGrid();
                upnl1.update //update panel is updated here.
            }
            else
            {
                ScriptManager.RegisterStartupScript(this.upnl1, this.GetType(), "Search", "alert('Enter search text');", false);
                //upnlgvOpportinities.Update();
                //upnlAdmin.Update();
                return;
            }
        }

Please help! Let me know if any info is needed

Answer 1

Replace Your ScriptManager line with below code line.

ScriptManager.RegisterStartupScript(this.upnl1, this.GetType(), "Script", "alert('Enter search text');", true);