How can i call java script function(in .cs) in the OnClientClick of the link button?

Question

I write script like this in my .cs file :

 StringBuilder script = new StringBuilder();
 script.Append("<script type=\"text/javascript\"> function submitform(){");
 script.Append(" document.forms['" + ((HtmlGenericControl)frm).Attributes["id"] + "'].submit();} </");
 script.Append("script>");

---

How can i call this function in the OnClientClick of my link button ?

LinkButton hl_process = new LinkButton();
hl_process.OnClientClick = ""

---

Edit1:

protected Control CreateCommForm()
{
    HtmlGenericControl frm = new HtmlGenericControl("form");
    frm.Attributes.Add("id", "sal");
    frm.Attributes.Add("method", "post");
    frm.Attributes.Add("action", "https://------");
    /////////////////////////////////////////
    HtmlGenericControl hdn_sal_a = new HtmlGenericControl("input");
    hdn_sal_a.Attributes.Add("id", "hdn_sal_a");
    hdn_sal_a.Attributes.Add("name", "hdn_sal_a");
    hdn_sal_a.Attributes.Add("type", "hidden");
    hdn_sal_a.Attributes.Add("value", Session["emp_num"].ToString());
    /////////////////////////////////////////
    HtmlGenericControl hdn_sal_b = new HtmlGenericControl("input");
    hdn_sal_b.Attributes.Add("id", "hdn_sal_b");
    hdn_sal_b.Attributes.Add("name", "hdn_sal_b");
    hdn_sal_b.Attributes.Add("type", "hidden");
    hdn_sal_b.Attributes.Add("value", Session["user_name"].ToString());

    frm.Controls.Add(hdn_sal_a);
    frm.Controls.Add(hdn_sal_b);

    column1.Controls.Add(frm);
    return frm;

}

Answer 1

Use jquery to bind to the click event instead of doing this on the server side:

<a href="#" class="blah">Submit Me</a>

then in javascript something like:

<script type="text/javascript">
$('.blah').click(function() {
   document.forms[0].submit();
});
</script>

Edit:

While you can generate UI elements with codebehind it's not quite the asp.net way. Use repeaters if you must repeat the generation of controls. Actually, creating multiple forms is not the asp.net way either, as it assumes only one form running at the server context and everything else binds to an event on submission. Anyways, it seems you're still learning asp.net and probably coming form PHP or something similar.

To accommodate your request, I'd advice to stay away from from generating JS on the server side. Give different class names to your forms and use the same method above. You don't need a LinkButton to submit the form, a simple anchor <a> fits the bill.

You can use the ClientID property (if you don't use classes), but you must first attach the parent control to the page for the algorithm to kick in.

So, your code would be something like:

protected Control CreateCommForm()
{
   ...
   column1.Controls.Add(frm);   

   HtmlGenericControl a = new HtmlGenericControl("a");
   a.Attributes["onclick"] = "$('#" + frm.ClientID + "').submit();";
   a.InnerText = "Submit me";
   frm.Controls.Add(a);
   return frm;
}

The alternative way (better separation of concerns)

protected Control CreateCommForm()
{
   ...
   column1.Controls.Add(frm);   

   HtmlGenericControl a = new HtmlGenericControl("a");
   a.Attributes["class"] = "submitter";
   a.InnerText = "Submit me";
   frm.Controls.Add(a);
   return frm;
}

And in javascript we find the parent form and submit it (this can be in a static js file):

<script type="text/javascript">
$('.submitter').click(function( 
  $(this).parents('form').submit();
));
</script>