Perform ASP.NET Postback using JQuery
Came across a situation where I needed to disable the ASP.NET button using JQuery when the user clicks on the button, this is so we stop the user from clicking the button twice while the page is doing a postback. Firstly, add the following JQuery/Javascript code: <script> function autoSubmit() { <%= ClientScript.GetPostBackEventReference(btnSaveChanges, "") %>; } [...]
Some useful Extension Methods
Back to basics… A couple of useful Extension methods if you are checking if a string is a valid integer or decimal. public static bool IsInteger(this string value) { if (String.IsNullOrEmpty(value)) return false; Int32 tmpNo; return Int32.TryParse(value, out tmpNo); } public static bool IsDecimal(this string value) { if (String.IsNullOrEmpty(value)) return false; Decimal tmpNo; return Decimal.TryParse(value, [...]
OrderBy making null records come last Entity Framework and Linq
Ever want to sort your result set but make sure the records with a null sorting column appear last? See the example below var results = (from x in EntityObjectContext.MyTable select x into grp [...]
Finding StoreGeneratedPattern value in EdmProperty in T4 Template
If you need to find out if a primary key in your conceptual model which is using the Identity value from the property StoreGeneratedPattern, you can use the following code: (NOTE: This is used within a T4 template) string inputFile = @"..\EntitiesModel.edmx"; EdmItemCollection ItemCollection = loader.CreateEdmItemCollection(inputFile); string annotationNamespace = "http://schemas.microsoft.com/ado/2009/02/edm/annotation"; foreach (EntityType entity in ItemCollection.GetItems<EntityType>().OrderBy(e [...]
Back to Basics – Deleting Cookies using ASP.NET
You cannot instruct ASP.NET to physically remove cookies from the user’s computer so you have to tell the user’s browser to modify the cookie in order to trigger the browser to remove the cookie. See code example: HttpCookie aCookie; string cookieName; int limit = Request.Cookies.Count; for (int i=0; i { cookieName = Request.Cookies[i].Name; aCookie = [...]
You receive a “The incoming tabular data stream (TDS) remote procedure call (RPC) protocol stream is incorrect” exception when using NVarchar parameters with Sqlclient
The problem I got the following random error: You receive a “The incoming tabular data stream (TDS) remote procedure call (RPC) protocol stream is incorrect” exception when using NVarchar parameters with Sqlclient The Solution Its a known bug with the .Net SqlClient Data Provider. If you have a field in the database of type nvarchar(max) [...]
Open XML – OLE Automation Date Issues
If you are exporting a date from C# to Excel using 2007, you probably will use the following: Math.Round(DateTime.Now.ToOADate(), 12).ToString() This exports the date as a OLE Automation date recognized by Excel 2007. How ever, in Excel 2010 this was causing issues, every time I exported to Excel 2010, it said that it has to [...]
EF Strongly Typed ObjectQuery.Include
The problem that I faced was having to put up with “hard coded” strings in the ObjectQuery.Include function to load related objects through POCO objects in the Entity Framework. This faced challenges when I renamed columns in the Model which caused a run-time error when recompiling and re-starting the application. Thanks to David Kiff, we [...]
Fixing the EF Tracing and Caching Provider Wrapper Issue
If you have been using the Tracing and Caching Provider Wrappers for the ADO.NET Entity Framework 4.0, you might of come across this error message when creating POCO objects, adding them to a Data Context and commiting them to the database using the Caching Wrapper: [NotImplementedException: The method or operation is not implemented.] EFCachingProvider.EFCachingDataReaderCacheWriter.GetName(Int32 ordinal) [...]
Detect when a session has ended ASP.NET
A problem that I have had in the past is trying to find out when a session has expired within ASP.NET and how to deal with the expired session. One solution is to add the following code into the Page_Init event. You can add this event into a class that inherits the Page class so [...]
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CodeLab Twitter- codelabnz: @bartekmarnane some info on micro orms http://t.co/UDfv5ML7 February 5, 2012
- codelabnz: @bartekmarnane depends on the project, but i found u have 2 be very careful with EF and the type of SQL it generates February 5, 2012
- codelabnz: @bartekmarnane I have been using EF for awhile, good for building apps quickly, but found it performs bad on higher traffic web applications February 5, 2012
- codelabnz: stuff it, I give up on Entity Framework, going to a micro ORM, back to writing SQL queries! I would rather do this than have a slow app! February 5, 2012
- codelabnz: Been too busy for tweeting lately January 21, 2012
- codelabnz: Blog Post: Setting the screen position when visiting previous page with jQuery http://t.co/evuKxVv0 January 17, 2012
- codelabnz: is anyone using Godaddy Cloud hosting? can someone provide their website so I could do a speed test? January 9, 2012
- codelabnz: Blog Post: Magento Fontis Paymate Module Fix for Not Passing Data Issue http://t.co/tgaDjmHv December 28, 2011
- codelabnz: first attempt upgrading magento from 1.4 to 1.6 fail. worst upgrade documentation. time to bring out the hack ninja December 27, 2011
- codelabnz: We would like to wish everyone a Merry Christmas and a Happy new year for 2012. Thank you all for your support... http://t.co/IGB5FlzO December 23, 2011