registerstartupscript

what I have tried I'm trying this since yesterday, to trigger a alert() when an ASP Button_Click . However, when I paste this script in Page_Load it works perfectly fine. ScriptManager.RegisterStartupScript(this, typeof(Page), "alert", "alert('Fill all fields.');", true); I have also tried it with below code, ClientScript.RegisterStartupScript which works on page load and not on ASP Button_Click ClientScript.RegisterStartupScript(this.GetType(), "Alert", "alert('Fill all fields.');", true); what I need to do Need to validate the textboxes present in client side, if these textboxes are empty it

i have some code in OnInit hanlder if (!Page.ClientScript.IsStartupScriptRegistered(GetType(), "MyScript")) { Page.ClientScript.RegisterStartupScript(GetType(), "MyScript", GetStartupScript(), true); } here i try to register some java script code. and i want it to work on button click event. but it doesn't execute. it executes only after refreshing page. can anyone explain me why it doesn't execute? thnx in advance! Try this: ScriptManager.RegisterStartupScript(this, typeof(string), "Error", "alert('hi');", true); Vishal Kulkarni string msg = "This is variable message"; Page.ClientScript

I have searched SO & google, but I can't seem to get this to work. The code is in the codebehind click event of a "Cancel" button in my asp.net application but does not seem to close the popup window. Any ideas? try { if (btnCancel.Text == "Close") { String csName1 = "PopupScript"; Type csType = this.GetType(); ClientScriptManager cs = Page.ClientScript; if (!cs.IsClientScriptBlockRegistered(csType, csName1)) { ClientScript.RegisterStartupScript(GetType(), "ClosePopup", "window.close();", true); } } } Update: After postback, when I look at the source page, the only code I see related is: //<!