Custom Server Controls

Re: Writing JavaScript from a Custom Control

dba123 — Wed, 01 Jul 2009 13:08:02 GMT

Thanks all.. let me reiterate some more here.

1) We don't really have a concern of the js being in the dll. We're not sending this to lets say a consumer but yea I get your point regardless.

2) Does it really matter how I render the final JavaScript? Meaning to me it seems like I have several choices and no matter which way you dice it, they're all gonna do the same thing..spit out the JavaSCript one way or another. So I see my options are:

a) Use the HttpTextWriter...yea you have to specify the start and end tag of the javascript but so what...

b) Use the RegisterClientScriptInclude or just RegisterClientScript (if not including it in a .js)

c) If you want to append the INamingContainer clientID you could also use Page.ClientScript.RegisterExpandoAttribute but in my case I don't need to do this for the jQuery that I'll be rendering out.

am I right on?

Re: Writing JavaScript from a Custom Control

imran_ku07 — Wed, 01 Jul 2009 06:54:55 GMT

ClientScript.RegisterClientScriptBlock is better where you have need to render only once for a given key while writer.Write will write as many times as you can.

By the Performace is the key for writer.write

Re: Writing JavaScript from a Custom Control

galankar.tushar — Wed, 01 Jul 2009 05:41:45 GMT

dba123:

I'm new to writing custom controls. I have MyCustomControl.cs and in my Render method I want to render out about 50 lines of JavaScript. What's the best way to do this, use the writer?

protected override void Render(HtmlTextWriter writer)
        {


            writer.Write(@"
                            function decode(s)
                            {
                                return s.replace(/&/g, ""&"")
                                .replace(/"/g, '""')
                                .replace(/'/g, ""'"")
                                .replace(/</g, ""<"")
                                .replace(/>/g, "">"");
                            };"
            );

I plan on having around 6 more writer.Write to write out some more sections here. Is that the best approach to actually perform the writing of JavaScript in this manor?

or should I use ClientScript.RegisterClientScriptBlock?

Hi,

If you are developing custom control and you want to use JavaScrip code. And it should be easily maintainable and readable for developer
Then you can write your JavaScript code in separate .js file. and use this JavaScript file as a embedded resource in your custom control dll.
So that your javascript code will be easily maintanable, readable as well as there is no deployment issue...because the .js fiel is embadded in the
custom Controls dll.

For this method

1) create one javascript file in the custom Control project
2) Add one namespace level attribut in your code
[assembly: WebResource("namespace.className.AsynchronousRequestManager.js", "text/javascript")]
3) And include this javascript code in your custom control

 if (!Page.ClientScript.IsClientScriptIncludeRegistered(GetType(), "MyPortal_AsynchronousRequestManager"))
                Page.ClientScript.RegisterClientScriptInclude(GetType(), "MyPortal_AsynchronousRequestManager", Page.ClientScript.GetWebResourceUrl(GetType(), "namespace.classname.AsynchronousRequestManager.js"));

If you you want some more information , then search as 'Embadded Web resource in .net

Please mark this post as answer, if it helped

Re: Writing JavaScript from a Custom Control

RatheeshC — Wed, 01 Jul 2009 01:32:03 GMT

Hi,

So where are you going tto write these statements..?

protected override void Render(HtmlTextWriter writer)
        {


            writer.Write(@"
                            function decode(s)
                            {
                                return s.replace(/&/g, ""&"")
                                .replace(/"/g, '""')
                                .replace(/'/g, ""'"")
                                .replace(/</g, ""<"")
                                .replace(/>/g, "">"");
                            };"
            );

Re: Writing JavaScript from a Custom Control

dba123 — Wed, 01 Jul 2009 00:23:28 GMT

this is being spit out from a custom control, not code behind. This is a plan .cs file like MyCustomControl. They will not have a code behind.

Re: Writing JavaScript from a Custom Control

RatheeshC — Tue, 30 Jun 2009 23:49:33 GMT

Hi,

You have to do that from your code behind manually usig string.PadLeft() and PadRight() function

Thanks

Re: Writing JavaScript from a Custom Control

dba123 — Tue, 30 Jun 2009 21:59:37 GMT

What if I want to retain indentation so that the JavaScript is actually readable once rendered in source? Would this retain indentation as I have it?

StringBuilder carouselJavaScript = new StringBuilder();

            carouselJavaScript.Append(
                                        @"jQuery(document).ready(function()
                                            {
                                                $('#mycarousel').jcarousel({
                                                itemLoadCallback: mycarousel_itemLoadCallback
                                            });
                                        });");

Re: Writing JavaScript from a Custom Control

RatheeshC — Tue, 30 Jun 2009 21:49:28 GMT

You can decare a stringbuilder class.. initiate it and append the script code

to the string builder..and finally you could use

writer.write(stringbuildername here)

eg:

StringBuilder sb = new StringBuilder();
sb.Append("<script type=\"text\\javascript\" language=\"javacsript\">");
sb.Append("function TestFf(){ alert(\"hi\")");

writer.write(sb);

Thanks

Writing JavaScript from a Custom Control

dba123 — Tue, 30 Jun 2009 21:39:47 GMT

I'm new to writing custom controls. I have MyCustomControl.cs and in my Render method I want to render out about 50 lines of JavaScript. What's the best way to do this, use the writer?

I plan on having around 6 more writer.Write to write out some more sections here. Is that the best approach to actually perform the writing of JavaScript in this manor?

or should I use ClientScript.RegisterClientScriptBlock?