Call Javascript Function from Codebehind Events

Question

Hi I want to call JavaScript function from the button_click event. I want fetch data from database first in the click event and then need to pass data to the javascript function for further processing. Any Help appreciated.............. Thanks VIkram

Jaish Mathews · Answer

If UdatePanel is there then register to ScriptManager like below. Take care of parameters as they varies. ScriptManager .RegisterStartupScript(Page this .GetType() Alert  alert('Hello');  true );

Vikram · Answer

Actually Button on whose Click event I have written the code is present in the Update Panel. When I remove Button from the Update Panel its working fine. Why Its working this way. I want that button in the Update Panel itself. Regards VIkram

Jaish Mathews · Answer

Hi Check that whether your browser has Javascript enabled. Tools->InternetOptions->SecurityTab->Internet Icon->Custom Level Button->Scripting Section Tools->InternetOptions->SecurityTab->Local Intranet Icon->Custom Level Button->Scripting Section

Christofel Hakim · Answer

Thats weird... its working for me. then you should try this one: ScriptManager.RegisterStartupScript(this Page.GetType() Alert window.alert('Hello'); true);

Vikram · Answer

Thanks Christofel I tried your solution but its not calling desired function. I just test it using following code: ClientScriptManager script = Page.ClientScript; script.RegisterStartupScript(this.GetType() Alert alert('Hello') true); Its not showing me Message Box.

Crish · Answer

hi protected void cmdSave_Click(object sender EventArgs e) { if ( condition) { string script =  ; script += Confirm(); script += ; Page.RegisterClientScriptBlock(ClientScript script); } }

Christofel Hakim · Answer

Hi Vikram you can use ClientScriptManager to call javascript function on your code behind. Here i give you a simple example: ClientScriptManager script = Page.ClientScript; MyTextBox.Text = Christofel; //load your data here script.RegisterStartupScript (this.GetType() Alertalert(document.getElementById('MyTextBox').value)true); //calll your javascript function then pass the parameter from your asp.net control.