Calling a javascript function after a server call in asp.net web forms

Question

Is there a way in web forms to call a javasctipt function after making a server call for example

function showAlert(){ 
   alert("hello");
}


 <asp:Button ID="callJavasctips" runat="server" Text="callJavasctipt" OnClick="callJavaSctipt_click" />

In MVC I can say OnSuccess = "showAlert()" is there a way to do this in webforms?

UPDATE

I ended up using ScriptManager instead of Page.ClientScript because it didn't work with update panels.

Bala R · Accepted Answer · 2011-06-06 15:35:09Z

1

For calling javascript after, you'll have to use ClientScriptManager.RegisterStartupScript() on your button's click handler.

I'm not sure if you would be interested in this, but you can define onclientclick="some_javascript_snippet" for <asp:Button /> but it's called before the server side handler.

answered Jun 6, 2011 at 15:35

Bala R

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Hasan Fahim · Accepted Answer · 2011-06-06 15:35:51Z

0

In the callJavaSctipt_click event in the code behind, do the following:

Page.RegisterClientScriptBlock("MyScript","<SCRIPT Language='JavaScript'> alert('Hello'); </SCRIPT>");

answered Jun 6, 2011 at 15:35

Hasan Fahim

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4 Comments

Bala R Over a year ago

Page.RegisterClientScriptBlock() is obsolete. see msdn msdn.microsoft.com/en-us/library/…

Hasan Fahim Over a year ago

@crocaduck81. The difference between RegisterClientScriptBlock and RegisterStartupScript is that RegisterStartupScript adds the script to the top of the aspx page where as RegisterClientScriptBlock adds the script to the end. The choice is important if you are accessing any html controls from the script. In this scenario it doesn't matter which ever you call.

Hasan Fahim Over a year ago

@Bala R. Obsolete in the .NET 4.0 framework. But it could be used with framework earlier than that.

Bala R Over a year ago

it's marked obsolete in .net 4 but it has been deprecated since .net 2.0, I think.

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