Question

I have the following ASP.NET (VB) code below.
My goal is to get the output of a stored proc that accepts 1 parameter and store that info
into a data table:

        Dim strConnection1 As String = System.Configuration.ConfigurationManager.AppSettings("Rdf2012")
        Dim conn1 As System.Data.SqlClient.SqlConnection
        conn1 = New System.Data.SqlClient.SqlConnection(strConnection1)
        Dim cmd1 As New SqlCommand
        Dim prm1 As New SqlParameter
        Dim dtDataTable1 As DataTable
        cmd1.Connection = conn1
        cmd1.CommandText = "usp_GetDetails"
        cmd1.CommandType = CommandType.StoredProcedure
        prm1 = cmd1.Parameters.Add(strProgramID, SqlDbType.VarChar, 50)
        prm1.Direction = ParameterDirection.Input

        conn1.Open()

        Dim dataAdapter As New SqlDataAdapter
        dataAdapter.SelectCommand = cmd1

        Dim ds1 As New DataSet
        dataAdapter.Fill(ds1)
        conn1.Close()

        dtDataTable1 = ds1.Tables("Table1")

Program stops at

    dataAdapter.Fill(ds1) and says:

@1012952-4403 is not a parameter for procedure usp_GetDetails

This is what the stored proc looks like:

    ALTER PROCEDURE [dbo].[usp_GetDetails]
@ProId VARCHAR(20) = NULL
    AS

Answer 1

You need to do

prm1 = cmd1.Parameters.AddWithValue ("@ProID", strProgramID)

instead of

 prm1 = cmd1.Parameters.Add(strProgramID, SqlDbType.VarChar, 50) 
 prm1.Direction = ParameterDirection.Input 

Direction will be assumed to be input unless otherwise specified.