I'm not sure if this is similar to http://www.llblgen.com/TinyForum/Messages.aspx?ThreadID=18226 but I'm hoping it's not and that this can actually work. I'm trying to convert RecipeEntity into a Recipe class (Mapper.MakeRecipe does this).

Error: Unable to cast object of type 'System.String' to type 'EntityClasses.RecipeEntity'.

(
                 from r in metaData.Recipe
                 select Mapper.MakeRecipe(r)
)
.ToList<Recipe>()

and the map method:
        public static Recipe MakeRecipe(EntityClasses.RecipeEntity recipe)
        {
            Recipe r = new Recipe()
            {
                RecipeID = recipe.RecipeId,
                RecipeName = recipe.RecipeName,
                Description = recipe.Description
            };
            return r;
}

Stacktrace:

at lambda_method(Closure , Object[] , Int32[] ) at SD.LLBLGen.Pro.LinqSupportClasses.DataProjectorToObjectList1.AddRowToResults(IList projectors, Object[] rawProjectionResult) in c:\Myprojects\VS.NET Projects\LLBLGen Pro v3.0\Frameworks\LLBLGen Pro\RuntimeLibraries\LinqSupportClasses\DataProjectorToObjectList.cs:line 114 at SD.LLBLGen.Pro.LinqSupportClasses.DataProjectorToObjectList1.SD.LLBLGen.Pro.ORMSupportClasses.IGeneralDataProjector.AddProjectionResultToContainer(List1 valueProjectors, Object[] rawProjectionResult) in c:\Myprojects\VS.NET Projects\LLBLGen Pro v3.0\Frameworks\LLBLGen Pro\RuntimeLibraries\LinqSupportClasses\DataProjectorToObjectList.cs:line 99 at SD.LLBLGen.Pro.ORMSupportClasses.ProjectionUtils.FetchProjectionFromReader(List1 valueProjectors, IGeneralDataProjector projector, IDataReader datasource, Int32 maxNumberOfItemsToReturn, Int32 pageNumber, Int32 pageSize, Boolean clientSideLimitation, Boolean clientSideDistinctFiltering, Boolean clientSidePaging, UniqueList1 stringCache, Dictionary2 typeConvertersToRun) in c:\Myprojects\VS.NET Projects\LLBLGen Pro v3.0\Frameworks\LLBLGen Pro\RuntimeLibraries\ORMSupportClasses\Projection\ProjectionUtils.cs:line 202 at SD.LLBLGen.Pro.ORMSupportClasses.DaoBase.GetAsProjection(List1 valueProjectors, IGeneralDataProjector projector, ITransaction transactionToUse, IRetrievalQuery queryToExecute, Dictionary2 typeConvertersToRun) in c:\Myprojects\VS.NET Projects\LLBLGen Pro v3.0\Frameworks\LLBLGen Pro\RuntimeLibraries\ORMSupportClasses\SelfServicingSpecific\DaoBase.cs:line 668 at SD.LLBLGen.Pro.ORMSupportClasses.DaoBase.GetAsProjection(List1 valueProjectors, IGeneralDataProjector projector, ITransaction transactionToUse, IEntityFields fields, IPredicateExpression filter, IRelationCollection relations, Int32 maxNumberOfItemsToReturn, ISortExpression sortClauses, IGroupByCollection groupByClause, Boolean allowDuplicates, Int32 pageNumber, Int32 pageSize) in c:\Myprojects\VS.NET Projects\LLBLGen Pro v3.0\Frameworks\LLBLGen Pro\RuntimeLibraries\ORMSupportClasses\SelfServicingSpecific\DaoBase.cs:line 629 at SD.LLBLGen.Pro.LinqSupportClasses.LLBLGenProProvider.ExecuteValueListProjection(QueryExpression toExecute) in c:\Myprojects\VS.NET Projects\LLBLGen Pro v3.0\Frameworks\LLBLGen Pro\RuntimeLibraries\LinqSupportClasses\LLBLGenProProvider.cs:line 165 at SD.LLBLGen.Pro.LinqSupportClasses.LLBLGenProProviderBase.ExecuteExpression(Expression handledExpression) in c:\Myprojects\VS.NET Projects\LLBLGen Pro v3.0\Frameworks\LLBLGen Pro\RuntimeLibraries\LinqSupportClasses\LLBLGenProProviderBase.cs:line 264 at SD.LLBLGen.Pro.LinqSupportClasses.LLBLGenProProviderBase.Execute(Expression expression) in c:\Myprojects\VS.NET Projects\LLBLGen Pro v3.0\Frameworks\LLBLGen Pro\RuntimeLibraries\LinqSupportClasses\LLBLGenProProviderBase.cs:line 93 at SD.LLBLGen.Pro.LinqSupportClasses.LLBLGenProProviderBase.System.Linq.IQueryProvider.Execute(Expression expression) in c:\Myprojects\VS.NET Projects\LLBLGen Pro v3.0\Frameworks\LLBLGen Pro\RuntimeLibraries\LinqSupportClasses\LLBLGenProProviderBase.cs:line 696 at SD.LLBLGen.Pro.LinqSupportClasses.LLBLGenProQuery1.Execute() in c:\Myprojects\VS.NET Projects\LLBLGen Pro v3.0\Frameworks\LLBLGen Pro\RuntimeLibraries\LinqSupportClasses\LLBLGenProQuery.cs:line 87 at SD.LLBLGen.Pro.LinqSupportClasses.LLBLGenProQuery`1.System.Collections.Generic.IEnumerable<T>.GetEnumerator() in c:\Myprojects\VS.NET Projects\LLBLGen Pro v3.0\Frameworks\LLBLGen Pro\RuntimeLibraries\LinqSupportClasses\LLBLGenProQuery.cs:line 162

Hi there,

The problem here is that the object 'r' isn't materialized yet. You could just 'select r' and then do a linq2object query to fill your custom classes.

Related thread: http://www.llblgen.com/TinyForum/Messages.aspx?ThreadID=15536