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Monday, February 25, 2013

How to call server side method code using javascript in asp.net




Here I would like to share code and process to call server side from the javascript. But in many cases we need to call any event method from javascript,In such cases I hope this article would help to resolve your process.
Initially you can call server side method event by two method of code. Here I illustrate with proper example to when we need to call method event using javascript.
Scenario 1;
Take as scenario in textbox when user enter text after the completion when users press enter key, you need to call the method in server side.

<asp:TextBox ID="TextBox1"  runat="server" onkeypress="return EnterEvent(event)"></asp:TextBox>   
<asp:Button ID="Button3" runat="server" style="display:none" Text="Button" />

In javascript we need to write a function enter event to call server side code button event.
<script type="text/javascript">
function EnterEvent(e) {
        if (e.keyCode == 13) {
            __doPostBack('<%=Button3.ClientID%>', "");
        }
    }
</script>

So when user press enter key it will call the button3 server side code event.

Scenario 2:

Also we can call server side code by another using this anther way i.e.
function caller(){
        document.getElementById('<%= Button3.ClientID %>').click(); 
        }

By using above code have alternate way to call server side from javascript.
I hope this article would helpful to you post your comments
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