The request failed for '' (procedure), because '' is a table valued function object - error

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I'm trying to execute my store function this way:

C#

using (var cmd = new SqlCommand("XXX.MyFunction", con))
{
    cmd.CommandType = CommandType.StoredProcedure;
    cmd.Parameters.AddWithValue("@myparDateFrom", from);
    cmd.Parameters.AddWithValue("@myparDateTill", due);
    cmd.Parameters.AddWithValue("@myparId1",id);                                                                                                              cmd.Parameters.Add("@Table_Var", new SqlDbType());
    cmd.Parameters["@Table_Var"].Direction = ParameterDirection.ReturnValue;

    con.Open();
    var result = cmd.ExecuteScalar();
    con.Close();
}

And I get error on executing :The request failed for '' (procedure), because '' is a table valued function object.
I've read that I need to wrap this function this SP. When I did it, everything works. But I need a function to return a table, and SP cannot do that. How can I return a table with my function?

Posted 16-Apr-14 3:38am

Alexander Dymshyts

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Nayan Ambaliya · Answer 1 · 2014-04-16T20:36:00

Consider the below example:

SQL

CREATE FUNCTION RemoveMe
(	
	
)
RETURNS TABLE 
AS
RETURN 
(
	select * from dbo.xxxx
)

In order to run the above function, a standard T-SQL statement would be:

SQL

select * from RemoveMe()

Therefore, in order to run it from C#, you would have to run a sql query as CommandType.Text by building the query along with parameters like

SQL

select * from RemoveMe(param1, param2...)

or build a stored procedure to call the table valued function and pass the parameters to the stored procedure.

Hope this help.

Regards,
Nayan