How can I call JavaScript function in a loop

Question

I would like to call JavaScript function many time . I have tried like that
In Script

 function changeIt(strgr , idx) {
    //SomeCode
    return;  
 }

In C#

 protected void btn_Click(object sender, EventArgs e)  
 {  
      string strgr = 001;
      for(int i=0; i<3; i++)  
      {  
          base.RunScriptBottom("changeIt(" + strgr + "," + i + ");");  
      }
 }

But it call the script function only one time. What could I do.
With regards

What JavaScript does this C# code actually emit to the page? C# code doesn't "call JavaScript" in the way you might be thinking. It just builds strings to emit to the page for the browser to interpret. — David
– David, Commented Jun 13, 2012 at 8:13
You can not call Javascript from C# code. C# code runs on the server, while JAvascript code runs in the client browser. You can only generate javascript code from C# code. In the generated code you can call the javascript function many times if you like. — Csaba Benko
– Csaba Benko, Commented Jun 13, 2012 at 8:15

hkutluay · Accepted Answer · 2012-06-13 08:19:41Z

1

Check ClientScriptManager.RegisterStartupScript

By the way, you can write a js function to loop and call from server side once..

 function changeAll(strgr , from, to) {

   for(int i = from, i< to; i++)
      changeIt(strgr ,i);
 }

Server Side:

protected void btn_Click(object sender, EventArgs e)  
 {  
      string strgr = 001;

          base.RunScriptBottom("changeAll(" + strgr + ",0,3);");  

 }

answered Jun 13, 2012 at 8:19

hkutluay

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1 Comment

Bastardo Over a year ago

Do not forget that you may need to run javascript functions with ScriptManager.RegisterStartupScript if you have an UpdatePanel on your page.

Charlie · Accepted Answer · 2012-06-13 09:43:32Z

0

You should add a client event to do this

<asp:Button Text="text" runat="server" OnClientClick="loop()" />
<script type="text/javascript">
    function loop() {
        var strgr = 001;
        for(var i=0; i<3; i++)  
        {  
            changeIt(strgr + "," + i );  
        }
    }
</script>

answered Jun 13, 2012 at 9:43

Charlie

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