ASP .NET – Page 3 – Knowledgebase

IE 9: Microsoft JScript runtime error: Unable to get value of the property ‘srcElement’: object is null or undefined

5 April, 2011 Roel van Lisdonk 14 Comments 1 category

When accessing an .net 3.5 web application in Microsoft Internet Explorer 9, I get the error: Microsoft JScript runtime error: Unable to get value of the property ‘srcElement’: object is null or undefined When

Solving the Error: ‘Sys’ is undefined in Microsoft Visual Studio 2010

11 January, 2011 Roel van Lisdonk 0 Comments 1 category

If you create a new ASp.NET Web Application project in Microsoft Visual Studio 2010 and want to use the Sys.Debug function in an JavaScript function, you get the error ‘Sys’ is undefined. To solve this

‘Sys’ is undefined or ASP.NET Ajax client-side framework failed to load in a ASP .NET 4.0 website

18 November, 2010 Roel van Lisdonk 12 Comments 1 category

I was getting the the error [‘Sys’ is undefined] and [ASP.NET Ajax client-side framework failed to load] in an ASP .NET 4.0 website. After reading and following the post [http://weblogs.asp.net/chrisri/archive/2007/02/02/demystifying-sys-is-undefined.aspx] I found my solution. De

How to resolve: "Unrecognized attribute ‘targetFramework’. Note that attribute names are case-sensitive"

27 October, 2010 Roel van Lisdonk 23 Comments 1 category

I was getting the error "Unrecognized attribute ‘targetFramework’. Note that attribute names are case-sensitive" on an ASP .NET 4.0 website. This was caused by the application pool targeting the wrong .net framework, change the application

How to dynamically set the connectionstring of a typed dataset (*.xsd file) when using an ObjectDataSource in ASP .NET

11 October, 2010 Roel van Lisdonk 0 Comments 1 category

If you are using a typed dataset (*.xsd) and you want to set it’s connection string, you can use the ObjectDataSource event OnObjectCreated. protected void MyObjectDaDataSource_OnObjectCreated(object sender, ObjectDataSourceEventArgs e) { if (e != null

How to enable SQL Service Broker on a SQL Server 2005 database to allow SqlCacheDependency

24 September, 2010 Roel van Lisdonk 0 Comments 1 category

If you are using SqlCacheDependency in you’re ASP .NET website, the database must have SQL Server Broker enabled. To enable SQL Server Broker on a SQL Server 2005 database use: USE master GO ALTER DATABASE

New features in ASP .NET 4.0 that I use

25 August, 2010 Roel van Lisdonk 0 Comments 1 category

After doing some projects for customers with ASP .NET 4.0, what are the new features that I used in the real world? SQL cache invalidation: this means that when the result set from SQL Server

How to resolve: Eval function does not work in master page, visible='<%# Eval(…) %>’

9 July, 2010 Roel van Lisdonk 0 Comments 1 category

If you want to set the visibility of a control based on some C# code like User.IsInRole("Administrator") directly in your *.aspx page, you can use the data binding syntax <%# … %> in the ASP

Best practices for using relative paths in CSS, HTML and ASP .NET

8 July, 2010 Roel van Lisdonk 0 Comments 1 category

In many cases, elements or controls on your page must refer to an external resource such as an image or another *.aspx file. To refer to these resources I prefer to use relative paths, because

Showing a many to many relationship in a GridView by using Entity Framework 4.0, EntityDataSource and data binding in ASP .NET 4.0

2 July, 2010 Roel van Lisdonk 4 Comments 1 category

The Microsoft SQL Server 2008 R2 sample database AdventureWorks, contains a table Product which as a many to many relationship with the table Document, via the junction table ProductDocument. This post describes the steps you

Tag: ASP .NET