JavaScript in ASP.NET!

z07924 · Nov 25, 2003

I have added a text box called "Email" and also I have two different check boxes are there. It is called supervisor and users. If I click the supervisor check box, I just want to add a email id in the text box. If I click the second users check box, I want to add multiple email ids on the text box. If I click the supervisor check box, it is just want to clear the email id on text box that are specific to supervisor check box.

I am using C#.NET. My code is given below.

private void chklistSupervisor_Changed(object sender, System.EventArgs e)
{
if(chklistSupervisor.Checked)
{
txtEmail.Text = "" + Session["gEmailID"] + "";
}
else
txtEmail.Text = "";
}

private void chklistUser_Changed(object sender, System.EventArgs e)
{
if(chklistUser.Checked)
{
txtEmail.Text = "" + Session["gEmailID"] + ";" + Session["gUserEmailID"] + "" ;
}
else
txtEmail.Text = "";

}

Since I have added some code in the check box change event, It doesn't work properly. It gives some problem when i click the check box.

I just want to change the above code to work using Javascript. so I have to write a JavaScript for that.
Can anyone give any ideas on this.

I would highly appriciate any help.

Thanks in Advance.

LV · Nov 25, 2003

First of all, the code has some typos in it:

Code:

private void chklistSupervisor_Changed(object sender, System.EventArgs e)
{            
 if(chklistSupervisor.Checked)
 {
  txtEmail.Text = Session[&quot;gEmailID&quot;].ToString();
 }
 else
 {
  txtEmail.Text = &quot;&quot;;             
 }
}

private void chklistUser_Changed(object sender, System.EventArgs e)
{            
 if(chklistUser.Checked)
 {
  txtEmail.Text = Session[&quot;gEmailID&quot;].ToString() + &quot;;&quot; + Session[&quot;gUserEmailID&quot;];
 }
 else 
  txtEmail.Text = &quot;&quot;;            
 }
}

Second, there is no "oncheck" client side event for a checkbox, so if you just added a javascript event handler in your HTML, i.e. <asp:checkbox onchange="jsFunction" />, it won't work. Here is how you add it:

Code:

in code behind:
private void Page_Load(object sender, System.EventArgs e)
{
 if(chklistSupervisor.Attributes[&quot;onclick&quot;]==null)
 {
   chklistSupervisor.Attributes.Add(&quot;onclick&quot;, &quot;javascript:handleSuperviserBox(this)&quot;);
 }
}
in page HTML;
<head>
 <script language=&quot;javascript&quot;>
   function handleSuperviserBox(objCheck){
     if(objCheck.checked){
       //do something
     }
   }
 </script>
</head>

Same for another checkbox. The client side event will fire before it goes to the server side event handler.

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JavaScript in ASP.NET!

z07924

IS-IT--Management

LV

Programmer

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