telerik reporting q1 2014 and MS entity framework 5.0

[Rick]

Hi, 
I'm having serious issues with the telerik reporting in VS. I've created an MS Entity Framework model as a a separate class library as it states in the documentation. 
i'm using the EntityDataSource it finds my library and gets the dbcontext no problem. When i add report parameters it shows me all the fields for the context i selected. 
I assign the fields to the report parameter no problem. the problem happens when i try to preview the report i get the following error:

"an error occurred while invoking the data retrieval method. Try restarting Visual Studio.
A connection string has been provided but constructor with connection string argument could not be found. Either remove the connection string from the data source or provide a constructor which will use that connection string. For design time purposes a constructor that has a connection string and passes it to the base constructor is required."

I'm not sure what this means nor how to fix it. I've created 5 projects and gotten the same behavior. I've uploaded my app.config for review.
any help would be great

Thanks, 
Rick

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <configSections>
    <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
  </configSections>  
    <system.diagnostics>
        <sources>
            <!-- This section defines the logging configuration for My.Application.Log -->
            <source name="DefaultSource" switchName="DefaultSwitch">
                <listeners>
                    <add name="FileLog"/>
                    <!-- Uncomment the below section to write to the Application Event Log -->
                    <!--<add name="EventLog"/>-->
                </listeners>
            </source>
        </sources>
        <switches>
            <add name="DefaultSwitch" value="Information" />
        </switches>
        <sharedListeners>
            <add name="FileLog"
                 type="Microsoft.VisualBasic.Logging.FileLogTraceListener, Microsoft.VisualBasic, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL"
                 initializeData="FileLogWriter"/>
            <!-- Uncomment the below section and replace APPLICATION_NAME with the name of your application to write to the Application Event Log -->
            <!--<add name="EventLog" type="System.Diagnostics.EventLogTraceListener" initializeData="APPLICATION_NAME"/> -->
        </sharedListeners>
    </system.diagnostics>
  <connectionStrings>
    <add name="AdventureWorks2008R2Entities" connectionString="metadata=res://*/Model1.csdl|res://*/Model1.ssdl|res://*/Model1.msl;provider=System.Data.SqlClient;provider connection string=&quot;data source=tanortega\sqlexpress2008;initial catalog=AdventureWorks2008R2;persist security info=True;user id=sa;password=dont4get;MultipleActiveResultSets=True;App=EntityFramework&quot;"
      providerName="System.Data.EntityClient" />
    <add name="TelerikReport.My.MySettings.AdventureWorks2008R2"
      connectionString="metadata=res://*/Model1.csdl|res://*/Model1.ssdl|res://*/Model1.msl;provider=System.Data.SqlClient;provider connection string=&amp;quot;data source=tanortega\sqlexpress2008;initial catalog=AdventureWorks2008R2;persist security info=True;user id=sa;password=dont4get;MultipleActiveResultSets=True;App=EntityFramework&amp;quot;&quot; providerName=&quot;System.Data.EntityClient"
      providerName="System.Data.EntityClient" />
  </connectionStrings>
  <entityFramework>
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />
  </entityFramework>  
</configuration>

[IvanY]

Hi Rick,

Please have a look at our EntityDataSource documentation and more importantly the Configuring the database connectivity with the EntityDataSource component help article. It is noted there that if you are using the Database or Model First approaches you will have to add one additional constructor to your context using a partial class. The constructor has to be with a single string argument. The argument must be passed to the parent constructor. You will have to add a new class to your project and add this code:

partial class MyContext
{
  public MyContext (string connectionString)
    : base(connectionString)
  { }
}

I hope this helps.

Regards,
IvanY
Telerik

 

 

[Daniel]

thanks for the response Ivan, but am i adding this new class to the web project that contains the reports or in the class library that contains the model?

[christianamado]

Hi Daniel, you must insert the new class in your class library with the model.

Regards.