OdbcCommand on Stored Procedure - "Parameter not supplied" error on Output parameter
- by Aaron
I'm trying to execute a stored procedure (against SQL Server 2005 through the ODBC driver) and I recieve the following error:
Procedure or Function 'GetNodeID' expects parameter '@ID', which was not supplied.
@ID is the OUTPUT parameter for my procedure, there is an input @machine which is specified and is set to null in the stored procedure:
ALTER PROCEDURE [dbo].[GetNodeID]
@machine nvarchar(32) = null,
@ID int OUTPUT
AS
BEGIN
SET NOCOUNT ON;
IF EXISTS(SELECT * FROM Nodes WHERE NodeName=@machine)
BEGIN
SELECT @ID = (SELECT NodeID FROM Nodes WHERE NodeName=@machine)
END
ELSE
BEGIN
INSERT INTO Nodes (NodeName) VALUES (@machine)
SELECT @ID = (SELECT NodeID FROM Nodes WHERE NodeName=@machine)
END
END
The following is the code I'm using to set the parameters and call the procedure:
OdbcCommand Cmd = new OdbcCommand("GetNodeID", _Connection);
Cmd.CommandType = CommandType.StoredProcedure;
Cmd.Parameters.Add("@machine", OdbcType.NVarChar);
Cmd.Parameters["@machine"].Value = Environment.MachineName.ToLower();
Cmd.Parameters.Add("@ID", OdbcType.Int);
Cmd.Parameters["@ID"].Direction = ParameterDirection.Output;
Cmd.ExecuteNonQuery();
_NodeID = (int)Cmd.Parameters["@Count"].Value;
I've also tried using Cmd.ExecuteScalar with no success. If I break before I execute the command, I can see that @machine has a value.
If I execute the procedure directly from Management Studio, it works correctly.
Any thoughts? Thanks
