Using KnockoutJS with SignalR in ASP.NET MVC

KnockoutJS is a MVVM implementation for JavaScript written by Steve Sanderson, in my opinion the author of the best ASP.NET MVC textbooks available. Simply put it lets you bind a JavaScript object model to your HTML UI using a Read more

A MongoDB Tutorial using C# and ASP.NET MVC

In this post I'm going to create a simple ASP.NET MVC website for a simple blog that uses MongoDB and the offical 10gen C# driver. MongoDB is no NOSQL database that stores information as Binary JSON (BSON) in documents. I Read more

Linq To SQL Tutorial

Check out some of my other Linq to SQL posts: EntityBase Inheritance Modifiers with SQLMetal Linq to SQL with WCF Services Linq to SQL Framework (Repository/Business wrapper) ObjectDataSource binding with server side paging and sorting Load Options Generic Framework using reflection This is a basic tutorial for Read more

Free training/labs on MVC, ASP.NET, Entity Framework, IIS in Sydney

Posted on by Joe in Personal | Leave a comment

Web Camps is free so there is no excuse not to go…

http://www.webcamps.ms/#sydney_panel

Creating a Composite Server Control with ASP.NET

Posted on by Joe in ASP.NET, C# | 14 Comments

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When creating web applications with ASP.NET developers will usually create User Controls or Custom Server Controls. User Controls have the ASCX extension and allow developers to group together ASP.NET controls and functionality into a reusable control. Custom Controls are a bit more complex and require the developer to define the html that the control generates as well as all it’s functionality. It is also possible to add child ASP.NET controls to a Server Control and have the control render those child control and maintain their viewstate with little work. 

In .NET 2.0 the abstract CompositeControl class was introduced, which is derived from WebControl but also uses the interfaces INamingContainer, which makes sure all child controls have a unique ID, and ICompositeControlDesignerAccessor which is used to allow the control to render the control automatically at design time based on the child controls. The CompositeControl also ensures that child controls are always created which saves using the EnsureChildControls method that many Custom Control developers will be familiar with. 

In this post I’ll explain how to create a simple Composite Custom Control and how to customise the HTML that it renders. 

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How to select checkboxes in an ASP.NET CheckBoxList using jQuery

Posted on by Joe in ASP.NET, jQuery | 5 Comments

I came across a situation where I needed to make sure at least one checkbox in an ASP.NET CheckBoxList is checked before submitting the page.  Looking at the source each checkbox element created shares the same client ID with a different number at the end, so I needed a way to select all checkboxes where the ID started the same.

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Populate a select dropdown list using jQuery and Ajax

Posted on by Joe in Ajax, JavaScript, jQuery | 43 Comments

In this post I’ll explain how to populate a select dropdownlist using jQuery and Ajax.  I am using an ASP.NET web application and page methods to perform the Ajax calls.  Using page methods means that you do not need a seperate web service, which is good if the functionality is specifically for the page.  The page methods must be declared public static and use the WebMethod attribute. 

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Convert all static text email addresses to mailto links using jQuery

Posted on by Joe in JavaScript, jQuery | 6 Comments

In this post I’ll show how to use  jQuery to automatically convert all email addesses from static text into a mailto link.

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ASP.NET MVC – Using Controller.UpdateModel when using a ViewModel

Posted on by Joe in MVC | 31 Comments

When updating a model in MVC it is common to use the Controller.UpdateModel method.  I recently ran into an issue where I was using a custom ViewModel which meant that UpdateModel could not map the updated data back to my model object. The solution to this was a simple one, but not as obvious as it should be due to intellisense not picking up the method’s overloads when the generic type is inferred. 

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Creating a Delete link with MVC using POST to avoid security issues

Posted on by Joe in Ajax, jQuery, MVC | 6 Comments

It is fairly common to have a list of records with a hyperlink to delete a record.  The problem here is that with MVC the hyperlink will use a GET request to delete a record.  This is a fairly big security issue as anybody can browse to the URL and delete a record from your system.  In this post I’ll explain how you can use the Ajax helpers to create a hyperlink that will call your delete method without using GET.

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Creating and using snippets in Visual Studio 2008

Posted on by Joe in Visual Studio 2008 | Leave a comment

Visual Studio contains a number of predefined snippets. Snippets are usually available for common code that is used frequently allowing the developer to insert this code quickly without having to retype it every time. I often use the try and if snippets, but you can also create your own custom snippets. Recently I found myself to be endlessly creating a try/catch block where in the catch I was logging an exception using a custom logger class, so I decided to create a custom snippet to do this for me. In this post I’ll explain how to create a basic snippet, how to configure Visual Studio to use the snippet, and how to use it in code.

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Twitter

Posted on by Joe in Personal | Leave a comment

I decided to start a twitter account so if you feel like it you can follow me

Force client-side JavaScript event to fire programatically using jQuery

Posted on by Joe in JavaScript, jQuery | Leave a comment

Earlier today I needed to force a clide side event to fire programatically using jQuery.

I found you can do this easily with the jQuery trigger method:

$("#myControl").trigger("change");

The above will trigger the change event of the control with ID ‘myControl’