Entity Framework Stored Procedure Table Value Parameter

UPDATE

I’ve added support for this on Nuget Package – https://github.com/Fodsuk/EntityFrameworkExtras#nuget (EF4,EF5,EF6)

Check out the GitHub repository for code examples.

Slightly off question, but none the less useful for people trying to pass user-defined tables into a stored procedure. After playing around with Nick’s example and other Stackoverflow posts, I came up with this:

class Program
{
    static void Main(string[] args)
    {
        var entities = new NewBusinessEntities();

        var dt = new DataTable();
        dt.Columns.Add("WarningCode");
        dt.Columns.Add("StatusID");
        dt.Columns.Add("DecisionID");
        dt.Columns.Add("Criticality");

        dt.Rows.Add("EO01", 9, 4, 0);
        dt.Rows.Add("EO00", 9, 4, 0);
        dt.Rows.Add("EO02", 9, 4, 0);

        var caseId = new SqlParameter("caseid", SqlDbType.Int);
        caseId.Value = 1;

        var userId = new SqlParameter("userid", SqlDbType.UniqueIdentifier);
        userId.Value = Guid.Parse("846454D9-DE72-4EF4-ABE2-16EC3710EA0F");

        var warnings = new SqlParameter("warnings", SqlDbType.Structured);
        warnings.Value= dt;
        warnings.TypeName = "dbo.udt_Warnings";

        entities.ExecuteStoredProcedure("usp_RaiseWarnings_rs", userId, warnings, caseId);
    }
}

public static class ObjectContextExt
{
    public static void ExecuteStoredProcedure(this ObjectContext context, string storedProcName, params object[] parameters)
    {
        string command = "EXEC " + storedProcName + " @caseid, @userid, @warnings";

        context.ExecuteStoreCommand(command, parameters);
    }
}

and the stored procedure looks like this:

ALTER PROCEDURE [dbo].[usp_RaiseWarnings_rs]
    (@CaseID int, 
     @UserID uniqueidentifier="846454D9-DE72-4EF4-ABE2-16EC3710EA0F", --Admin
     @Warnings dbo.udt_Warnings READONLY
)
AS

and the user-defined table looks like this:

CREATE TYPE [dbo].[udt_Warnings] AS TABLE(
    [WarningCode] [nvarchar](5) NULL,
    [StatusID] [int] NULL,
    [DecisionID] [int] NULL,
    [Criticality] [int] NULL DEFAULT ((0))
)

Constraints I found include:

1. The parameters you pass into ExecuteStoreCommand have to be in order with the parameters in your stored procedure
2. You have to pass every column in to your user-defined table, even if they are have defaults. So it seems i couldn’t have a IDENTITY(1,1) NOT NULL column on my UDT