Error 2 Build failed due to validation errors in *.dbml

Question

I am getting the following error message in a C# 2008 application and I do not know what to look at to resolve the problem:
Error2 Build failed due to validation errors in C:\RPT.dbml.  Open the file and resolve the issues in the Error List, then try rebuilding the project.

There is nothing showing me where the exact error is coming from. There is a reference setup for System.Configuration.

The following code is from the RPT.designer.cs

namespace cli
{
using System.Data.Linq;
using System.Data.Linq.Mapping;
using System.Data;
using System.Collections.Generic;
using System.Reflection;
using System.Linq;
using System.Linq.Expressions;
using System.ComponentModel;
using System;
    using System.Configuration;

[System.Data.Linq.Mapping.DatabaseAttribute(Name="DEV")]
public partial class RPTDataContext : System.Data.Linq.DataContext
{

private static System.Data.Linq.Mapping.MappingSource mappingSource = new AttributeMappingSource();

  

public RPTDataContext() :
        base(ConfigurationManager.ConnectionStrings["DEVConnectionString"].ConnectionString.ToString(), mappingSource)
{
OnCreated();
}

The following code is from RPT.cs file:

namespace cli
{
    partial class RPTDataContext
    {
    }
}

Here is the code in the app.config file:

<connectionStrings>
    <add name="DEVConnectionString"
      connectionString="Data Source=xxx;Initial Catalog=PROD1;Integrated Security=True"
      providerName="System.Data.SqlClient" />
  </connectionStrings>

Thus can you tell me and/or show me in code how to fix this problem?

 

Answer 1

Hi,

there is a fix to this problem at this post  : http://www.jonathanjungman.com/blog/post/Visual-Studio-Build-failed-due-to-validation-errors-in-dbml-file.aspx

Hope this may help!

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One good question is equivalent to ten best answers.

Answer 2

While your dbml is not so big, did you try to completely remove it and recreate again?

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