Jon's Blog

Today, while attempting to build a class library on our build box I received the following error in Visual Studio 2008:

"Build failed due to validation errors in [FileName].dbml.  Open the file and resolve the issues in the Error List, then try rebuilding the project."

However, when I went to the dbml file no errors were shown in the error list.  To resolve this I deleted the .designer.cs file associated with the dbml file.  Then in Solution Explorer I right-clicked on the dbml file and selected "Run Custom Tool."  This regenerated the .cs file and I was then able to see the error, which was the following:

"DBML1005: Mapping between DbType 'Date' and Type 'System.DateTime' in Column '[ColumnName]' of Type '[TypeName]' is not supported."

This was easy enough to fix.  The Server Data Type just needed to be changed to DateTime.  Strangely enough having just Date on my development machine did not break the build.

I believed the root of the problem may be that the version of Visual Studio on my development machine was 9.0.30729.1 SP and the build machine was 9.0.21022.8 RTM.

So the other day while attempting to drag a stored procedure onto the LINQ Designer in Visual Studio I received the following error:

The stored procedure was rather complex including a call to FREETEXT and for some reason the LINQ Designer would not accept it, so I manually mapped the stored procedure for the DataContext.  For future reference, here is some sample code:

public partial class MyDataContext
{
    [Function(Name = "dbo.MyStoredProc")]
    public ISingleResult<MyClass> MyProcName(
        [Parameter(Name = "Parameter1")] int? parameter1,
        [Parameter(Name = "Parameter2")] ProductCategory? parameter2,
        [Parameter(Name = "Parameter3")] bool? parameter3)
    {
        IExecuteResult result = this.ExecuteMethodCall(this,
            ((MethodInfo)(MethodInfo.GetCurrentMethod())),
            parameter1, parameter2, parameter3);

        return ((ISingleResult<MyClass>)(result.ReturnValue));
    }
}

Then you can call the stored procedure in code like so:

var results = myDC.MyProcName(parameter1, parameter2, parameter3);

I don't expect anyone will read this blog.  It is being created for completely selfish reasons.  As a Web developer I frequently run into issues that require research in order to solve.  I hope to document my findings here, so that I can return to them as needed.  Who knows, maybe I'll even blog about other things too.  We shall see...