ASP.NET AJAX Validator ...

As promised weeks ago, here is my ASP.NET AJAX validation control “framework”.

To create your own AJAX validation control:

1. Create a new class which inherits UPDN.AjaxValidator:

1.public class YourValidator : UPDN.AjaxValidator { /*...*/ }

2. Provide a public static method to perform the validation, the signature of the method should be:

1.public static ValidationResult YourValidationMethod(string value)

3. Override OnServerValidate to call your public static validation method:

1.protected override bool OnServerValidate(string value)
2.{
3.    var result = YourValidationMethod(value);
4.    return result.IsValid;
5.}

4. Override GetScriptReferences to include your client-side script:

1.protected override void GetScriptReferences(ScriptReferenceCollection references)
2.{
3.    base.GetScriptReferences(references);
4.    references.Add(new ScriptReference("~/Scripts/YourValidator.js"));
5.}

5. Create the client-side control for your validation control, which inherits UPDN.AjaxValidator:

01.Type.registerNamespace("Example");
02.Example.YourValidator = function(element) {
03.    Example.YourValidator.initializeBase(this, [element]);
04.};
05.Example.YourValidator.prototype = {
06.    // Override validate to do pre-validation checks.
07.    validate: function(val, args, event) {
08.        Example.YourValidator.callBaseMethod(this, "validate", [val, args, event]);
09.    },
10.    // Override validated to do post-validation stuff.
11.    validated: function(result, event) {
12.        var val = this.get_element();
13.        // Do your custom validation message display stuff here!
14.    }
15.};
16.Example.YourValidator.registerClass("Example.YourValidator", UPDN.AjaxValidator);

6. Expose the YourValidationMethod method in YourValidator class as a “Page Method” in the code-behind:

1.[WebMethod]
2.public static ValidationResult YourValidationPageMethod(string domain)
3.{
4.    return YourValidator.YourValidationMethod(domain);
5.}

7. Add reference to your validation control in Web.config:
view source
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1.<pages>
2.    <controls>
3.    ...
4.        <add tagPrefix="example" namespace="Example"/>
5.    </controls>
6.</pages>

8. Add the validation control to your page, set the PageMethodName property to “YourValidationPageMethod”:

1.<example:YourValidator runat="server" ID="YourValidator1" ControlToValidate="TextBox1" Display="Dynamic" ErrorMessage="Your error message" PageMethodName="YourValidationMethod" ProgressIndicatorCssClass="wait" />

Download the (VS.NET 2008) solution from my SkyDrive.

 Original Source:
http://updatepanel.wordpress.com/2009/09/11/asp-net-ajax-validator/