SQLDataReader

When retrieving the values from a DataReader, you need to specify what type of value is being read:

so you code should look like this:

If drProduct.GetProduct.Read() Then
            Dim dr As SqlDataReader = drProduct.GetProduct()
            ddlCategoryID.SelectedValue = ddlCategory.SelectedItem.Value

             // I want to put in values from individual columns into text boxes but code below does not work?

            txtProductCode.text = dr.GetString(0) ' the ORDINAL position of the field
        End If

or:

If drProduct.GetProduct.Read() Then
            Dim dr As SqlDataReader = drProduct.GetProduct()
            ddlCategoryID.SelectedValue = ddlCategory.SelectedItem.Value

             // I want to put in values from individual columns into text boxes but code below does not work?

            txtProductCode.text = dr.GetString("ProductCode") ' the name of the field
        End If


AW

Hi odonovanpm,
Well, you first have to "read" a row from the reader... try adding this line before the assignment:

If dr.Read then
   txtProductCode.text = dr("ProductCode")
   dr.Close
End if

If that doesn't do it, I'd have to see what your GetProduct procedure looks like.
Cheers!

good catch, mdougan.  I totally missed that the asker had not 'read' the Datareader.

AW

drProduct.GetProduct() returns an sqldatareader, I have used it as the datasource for a datagrid and it displays fine so I don't think there is a problem with the class... drProduct.GetProduct.Read() is the same as what you suggested dr.Read()???

For some strange reason it isn't displaying the field, I get an error saying there is no data present but when I look in the table there is??? Very strange.

Wait a minute... this code is really confusing to me:

If drProduct.GetProduct.Read() Then
            Dim dr As SqlDataReader = drProduct.GetProduct()


First, what is drProduct?  I was assuming that this was some local class you'd developed, and that the GetProduct was a function that was part of that class...

Since dr is your local data reader and since you're theoretically setting it to a newly created datareader through that assignment, it makes no sense for you to be doing the .Read statement before that.

Here is how you'd normally open a datareader and read the contents:

        Dim oConn As SqlConnection
        Dim oCmd As SqlCommand

            'Get connection and set up for recordset (just a function I use to set conn)
            If Not NETSetConnection(oConn) Then
                Exit Function
            End If

            'Create a Command object.
            oCmd = oConn.CreateCommand
            oCmd.CommandText = "Select ProductID from Products Where Cust = 1"
            oCmd.CommandType = CommandType.Text
            oCmd.CommandTimeout = 600
            oDatareader = oCmd.ExecuteReader(CommandBehavior.CloseConnection)

            if oDatareader.Read Then
               txtProduct.Text = oDatareader("ProductID")
            end if
            oDatareader.Close

OK, sorry about that... It is a bit confusing the way I have presented it... drProduct is an instance of a local class I created, GetProduct is a method of the class, this method returns an sqldatareader by using the executereader method as you have in your code... There is no need for the 2nd line I put in "Dim dr as SqlDataReader = drProduct.GetProduct()"...

I just read something about this being an SQL problem, I don't know if this is true or not?

Opps, in that second example, your GetProduct function doesn't have to say GetProduct = oDataReader

Dim dr As SqlDataReader = drProduct.GetProduct()
        If dr.Read() Then
             ddlCategoryID.SelectedValue = ddlCategory.SelectedItem.Value

             // I want to put in values from individual columns into text boxes but code below does not work?

            txtProductCode.text = dr("ProductCode")
        End If


'In your code "dr" has not use its .read property