Question

Call Javascript function from codebehind C#

Asked by: hmpatel288

I have Popup() function in Javascript. How can I call this function from ASPX.cs code behind file ? Can I directly call Javascript function from my C# code behind. Thanks in advance.

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Asked On
2006-12-26 at 10:49:47ID22103475
Tags

javascript

,

call

,

function

,

from

Topic

Programming for ASP.NET

Participating Experts
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Comments
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Answers

 

by: jeebukarthikeyanPosted on 2006-12-26 at 11:02:00ID: 18199169

Hi ,
if ur planning to call a javascript within in a button control
then

btnAdd.Attributes.Add("onclick","return javascriptfunctionname();");
//javascriptfunctionname name the function u need to call

b u d d h a

 

by: hmpatel288Posted on 2006-12-26 at 11:10:25ID: 18199205

No, I am not planning to call from button click.
Like, My javascript function name is Popup().
now my code on aspx.cs is like
if(condition)
{
I want to call popup() function from javascript.
}

 

by: jeebukarthikeyanPosted on 2006-12-26 at 11:17:18ID: 18199229

hi,

Page.RegisterStartupScript("ff","<script>popup();</script>" );

ff is a unioque id given

b u d d h a

 

by: hmpatel288Posted on 2006-12-26 at 11:35:47ID: 18199301

No, I already have tried that.
How can that will work, actually "Page.RegisterStartupScript" is used to regiseter any new script in your page. but in my case I have already define my code for popup in separate javascript in "popup.js" and I want to call Popup from that separate javascript file.

Thanks again.

 

by: jeebukarthikeyanPosted on 2006-12-26 at 11:38:05ID: 18199313

hi,

have u included that js file on ur web page
check the path also

b u d d h a

 

by: mikeuttPosted on 2006-12-26 at 12:21:28ID: 18199528

I have done it like this before

Set the Body tag in your page/master page to runat="server" and an id="MainBody".

Put the script tag in your page like you normally would with any HTML file
<script src="popup.js"  type="text/javascript"></script>

Then in the code behind attach the onload attribute to the body tag .

 protected void Page_Load(object sender, EventArgs e)
        {
            MasterPageBodyTag = (HtmlGenericControl)Page.Master.FindControl("MainBody");
            MasterPageBodyTag.Attributes.Add("Onload", "Popup()");
        }

 

by: dash420Posted on 2006-12-27 at 01:58:23ID: 18201641

There will be some event for which you want the particular javascript need to fires. Since you want your javascript to fire when a particular condition satisfy. I can suggest you add the particular javascript on the page load event.

Code snippet will be like this.

web.aspx

<body id="Body" runat="server">

Code Behind file

if ( condition )
   Body.Attributes.Add("Onload", "javascript:popup()");
else
  Body.Attributes.Remove("Onload");



 

by: mikeuttPosted on 2006-12-27 at 07:48:40ID: 18202736

Or if you are using Master Pages where the body tag is in the Master Page. but only some of the content pages need to use the javascript.

You put this is the content pages that use the javascript.

 protected void Page_Load(object sender, EventArgs e)
        {
            MasterPageBodyTag = (HtmlGenericControl)Page.Master.FindControl("MainBody");
            MasterPageBodyTag.Attributes.Add("Onload", "Popup()");
        }

 

by: myviewPosted on 2007-11-01 at 22:10:16ID: 20198512

You can register your javascript in the page.

For example,

Page.RegisterClientScriptBlock("MyScript",
   "<script language=javascript src='MyJavaScriptFile.js'>");

 

by: FphcareSolutionsPosted on 2009-03-18 at 15:20:29ID: 23924426

Put javascript tags around a literal control.

<script language="javascript">
    <asp:literal runat="server" name="javlit1"></literal>
</script>


Then in your if statement, write the javascript you want to run to the control. When the page renders it will run your javascript and allow you to popup your window.

I.E.

If (condition is met)
{
 this.javlit1.text="alert('Cool bubble')";
}

Remember to clear the literal control on page_load, and to register your literal control.

Cheers
Greg

 

by: MohamedZakiPosted on 2009-12-15 at 04:28:32ID: 26052435

Calling Code behind Function in java script [1- using page method ]
http://ledomoon.blogspot.com/2009/12/calling-code-behind-function-in-java.html

20120131-EE-VQP-002

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