Joe Stevens' BlogEverything .NET and C#

JSON doesn’t have a standard way to represent a date. You can read about the reasons behind this here.

If you are using an ASMX web service returning JSON then you’ll find it serializes the DateTime object to a string that looks like this:

/Date(1278943200000)/

The numer in this string is the number of milliseconds since January 1st 1970 UTC, and this number can be used as a constructor argument to the JavaScript Date object.  So all we need to do is extract the number of milliseconds from the string.  This can be done easily using the regular expression shown in the post linked above.

var dateString = "/Date(1278943200000)/";
var date = new Date(parseInt(dateString.replace(/\/Date\((\d+)\)\//, '$1')));

In the above example I’ve manually set the date string, but you may get this from an AJAX response from the ASMX web service.  I then create a new Date object by using the regular expression and parsing the result at an integer.

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. 

Read the rest of this entry »

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.

Read the rest of this entry »

Download source

In this post I talked about how to use the jTemplates plugin for jQuery. Using my final example in the post I thought it would be cool to try and add some ‘edit in place’ functionality to the table.

For this to work I’ve created a Data Access Layer using Linq to XML. My web service then uses this DAL to save and retrieve my data.

Read the rest of this entry »

Download source

A guy in work introduced me to jTemplates, a template engine plugin for jQuery. It allows you to easily bind JavaScript objects to a defined template and also has some other nifty features.

I’ve found jTemplates to be particularly good when using ajax to display any information quickly and easily.

First I’ll explain how to create a simple template to display data, and then how to use the foreach and cycle features.

Read the rest of this entry »

Download source

Making ajax calls to an ASP.NET web service using jQuery is too easy.  In this post I’ll explain how to do it!

Read the rest of this entry »