Visual Studio .NET - Call Javascript function from C# code behind

Hi,

This is how my table looks like

<table>
<TR id="row1" style="display:none">
   <td>lblName1, lblID1, lblStatus1</td>
   <td> File1</td>
</tr>

<TR id="row2" style="display:none">
   <td>lblName2, lblID2, lblStatus2</td>
   <td> File2</td>
</tr>

...
</table>

I have  a javascript function that will make  a specific # of my table rows from invisible to visible.

function show_rows($num) {
	//Loop through rows until $num...set display style accordingly
	for (var $i=1; $i<=$num; $i++) {
		//Change the style to make visible
		document.getElementById('row'+$i).style.display = "";
	}
}
</script>

My C# code behind has a function called "Build_BulkUpload" which will receive the number of users chosen for BUlk Upload.

Depending on that number, I want to turn certain # of table rows  from invisible to visible.

So how can I call the "show_rows" javascript function from my C# function "Build_BulkUpload" ??

Example:

Response.Write("<script>show_rows();</script>");

http://www.codeproject.com/aspnet/ClientServer.asp

Thanks.. I will give this a try.

In the sample code, to call a javascript function from C# code behind,
its like

private void Page_Load(object sender, System.EventArgs e)
{
    btnOK.Attributes.Add("onclick","return ReqField1Validator()");
}

In my case, I want to call the java script function from the "Build_BulkUpload" function in my C# code behind..

I dont want to bind it with a button's click event, because this java script must be called in the page build function and not when the button is clicked...

is this possible?

method to get the function onto the page.

Try this writing in the page load event
Page.RegisterClientScriptBlock("MyScript", _
            "<script language=javascript>" & _
            "if (document.images) {" & _
            "MyButton = new Image;" & _
            "MyButtonShaded = new Image;" & _
            "MyButton.src = 'button1.jpg';" & _
            "MyButtonShaded.src = 'button2.jpg';" & _
            "}" & _
            "else {" & _
            "MyButton = '';" & _
            "MyButtonShaded = '';" & _
            "}" & _
            "</script>")

If you want more information see this linkl http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnaspp/html/aspnet-usingjavascript.asp

Most of these examples in the replies talk about calling a javascript function from a button's event.

like
[CODE]
<input type="submit" name="Button1" value="Button" 
             id="Button1" onclick="AlertHello()" />
[/CODE]

I dont want that. Instead I want to call the JS function from another function.

public void Build_BulkUpload(int n)
{
   //display n number of rows - call a JS function 
}

Is it posible to call a JS function from a C# function and not a button's event?

It is not possible to call client side function from within a code behind function.

Code behind functions are compiled and dumped in an assembly in Bin folder of an application. When ASP.NET processes a web form, code behind functions' assembly is linked and functions are called dynamically. That's why there specified various code behind attributes in @page directive of a web form.

i think it is not feasible to directly call a js function from within a C# function.

hi,how can we obtain the javascript variable text in to asp.net code,can u pls help me ...i want syntax how to call following nodetext in C#.NEt code...

my code is like...

function GetSelectedNodes()

var tree = <%= RadTree1.ClientID%>;

var selectedNodes = tree.GetSelectedNodes();

var nodetext = "";

var temp="";

if (selectedNodes != 0)

for (var i=0; i<selectedNodes.length; i++)

nodetext = nodetext + selectedNodes[i].Text + "; ";

documnent.getElementById('hdnX').Value= nodetext ;

return (nodetext);