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Old January 31st, 2007, 08:04 PM
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Default Changing combobox based on selection

I have two comboboxes.  One has items I input because there are only 4 choices to choose from.  Combobox 2 depends on what is selected on combobox one, but I don't know how to filter out combobox 2 based on what is selected on combobox 1.

Here is what I have:
Food_ComponentsCombobox has the items Milk, Meat, Fruits/Veg., and Grains/Breads

Food_Items_as_PurchasedCombobox is linked to a database that contains the columns Food Components and Food Items as Purchased plus some other stuff.

If I choose Milk in Food ComponentsCombobx, it should populate the Food_Items_as_PurchasedCombobox with only those food items that are milk.

I feel like I am going in the right direction, but I can't figure out the code that specifies I just want the Food Items the user selects.

This is my code and I advice that it is not working:

Private Sub Food_ComponentsComboBox_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Food_ComponentsComboBox.Click
        If Food_ComponentsComboBox.SelectedIndex = 1 Then
            With Me.Food_Item_as_PurchasedComboBox

                .DataBindings.Add("Milk", Me.USDABindingSource, "Food Components", True)

                .DataSource = Me.USDABindingSource
                .DisplayMember = "Food Item as Purchased"
                .ValueMember = "Food Components"
            End With

        End If

When I run this I get a message "Cannot bind the property "Milk" on the target control" and it points to Food Components on the .Databindings.Add line.  I know I'm doing this wrong, but I don't know how to make this work.  Again, I need for the user to choose from 4 items on combobox 1.  Depending on the item chosen, combobox2 should populate itself with only the items related to the item chosen.  Can anyone help?  I'd really appreciate it.  Thanks!

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