.NET - Jeff Widmer's Blog

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The configuration section 'system.web.extensions' cannot be read because it is missing a section declaration: After upgrading an ASP.NET application from .NET Framework 3.5 to .NET Framework 4.0 I ran into the following error message dialog when trying to view any of the modules in IIS on the server. What happened is during the upgrade, the web.config file was...
Posted 11 November 2011 05:27 AM by Jeff Widmer | 2 comment(s)
Filed under: .NET, ASP.NET, IIS7, .NET 4.0

VB.NET IF() Coalesce and “Expression Expected” Error: I am trying to use the equivalent of the C# “??” operator in some VB.NET code that I am working in. This StackOverflow article for “ Is there a VB.NET equivalent for C#'s ?? operator? ” explains the VB.NET IF() statement syntax which is exactly what I...
Posted 18 June 2011 02:58 PM by Jeff Widmer | 2 comment(s)
Filed under: .NET, ASP.NET, Visual Basic, Visual Studio, IIS7, .NET Target Framework, VB.NET

How to get an indexed item of an IEnumerable object (Linq): If you have an IEnumerable<T> collection of some objects T and you need to get a particular item out of that collection, you cannot use the standard indexing that you would normally use with brackets ([index]). If you try you will get an error...
Posted 29 January 2010 04:32 AM by Jeff Widmer | 3 comment(s)
Filed under: .NET, C#, IEnumerable, Linq, System.Collections.Generic

Line-breaks and carriage returns (\r \n) are invalid in email subject: I received this exception when sending an email using System.Net.Mail.MailMessage: "The specified string is not in the form required for a subject." System.ArgumentException: The specified string is not in the form required for a subject. ...
Posted 13 January 2010 05:39 AM by Jeff Widmer | 3 comment(s)
Filed under: .NET, ASP.NET, C#, System.Net.Mail.MailMessage

How to change the Target Framework Version for a Visual Basic Project: Today I received the following warning message from Visual Studio while adding a reference in a Visual Basic project: The Target Framework version for the project ‘XXXX’ is higher than the current Target Framework version. Would you like to add...
Posted 29 December 2009 03:05 PM by Jeff Widmer | 8 comment(s)
Filed under: .NET, Visual Basic, Visual Studio, .NET Target Framework

GDI+ Error when converting Tiff to Jpeg: Parameter is not valid: One of the web applications that I work on is Instant Church Directory , a website that helps churches create a church photo directory . Since the main focus of the application is to create a photo directory, customers are uploading all sorts of...
Posted 28 December 2009 03:07 PM by Jeff Widmer | 1 comment(s)
Filed under: .NET, C#, GDI+, Jpeg, System.Drawing, Tiff

nvarchar(max) parameters need the size set to -1: SQL Server 2005 supports a new data type nvarchar(max). This is one of the new max datatypes that are to replace ntext, text, and image in a future version of SQL Server (according to SQL Server Books Online) but you should start using them now. I recently...
Posted 15 August 2008 05:00 PM by Jeff Widmer | 21 comment(s)
Filed under: SQL Server, .NET, ASP.NET, C#, Visual Basic