Adding A Combo-Box to a DataGridView

Hi again

Reference to my previous question (https://www.experts-exchange.com/questions/27661434/Displaying-an-Image-in-a-DataGridView-Cell.html)

Now, what I'm looking for is to add a combo-box field in each row instead of an image, and for each combo-box in each row will have three selections ("Yes", "No", "I don't Know")

However, the selected value of each combo-box in each row could differ from the other combo-box selected values of the other rows, so some combo-boxes in some rows will have ("Yes") selected, some will have ("No") selected and the rest will have ("I don't know") selected depending on some criteria that I determine in my application.

I tried following the instructions in (http://vb.net-informations.com/datagridview/vb.net_datagridview_combobox.htm) but it generated an error for me (see attachment)

This is my full code for the grid generation:

            Dim ApplicationList As New DataSet
            ApplicationList = MC.DB(AppListSQLStr(MC.UserSysID()))

            Dim img_down As New DataGridViewImageColumn()
            Dim inImg1 As Image = Image.FromFile(IO.Directory.GetCurrentDirectory() + "\AppImages\down_arrow.jpg")
            img_down.Name = "MoveDown"
            img_down.HeaderText = ""
            img_down.Image = inImg1

            Dim img_up As New DataGridViewImageColumn()
            Dim inImg2 As Image = Image.FromFile(IO.Directory.GetCurrentDirectory() + "\AppImages\up_arrow.jpg")
            img_up.Name = "MoveUp"
            img_up.HeaderText = ""
            img_up.Image = inImg2

            '================================================
            'HERE IS THE COMBOBOX CODE I WANTED TO ADD
            Dim cmb As New DataGridViewComboBoxColumn()
            cmb.HeaderText = "Is Primary App?"
            cmb.Name = "cmb"
            cmb.MaxDropDownItems = 3
            cmb.Items.Add("Yes")
            cmb.Items.Add("No")
            cmb.Items.Add("I Don't Know")
            '================================================


            AppListOrderGridView.Columns.Add(img_down)
            AppListOrderGridView.Columns.Add(img_up)
            AppListOrderGridView.Columns.Add("ApplNum", "No.")
            '================================================
            'HERE IS HOW I WANTED TO ADD IT TO MY DATAGRID
            AppListOrderGridView.Columns.Add(cmb)
            '================================================
            AppListOrderGridView.Columns.Add("ApplName", "Application Name")
            AppListOrderGridView.Columns.Add("OrderID", "Order ID")
            AppListOrderGridView.Columns.Add("ApplOrder", "Order Value")


            For i = 0 To ApplicationList.Tables(0).Rows.Count - 1
                '================================================
                'I ADDED THE VARIABLE (CMB) HERE TOO AS A 3RD COLUMN IN THE TO-BE-ADDED ROW
                AppListOrderGridView.Rows.Add(inImg1, inImg2, (i + 1), cmb, ApplicationList.Tables(0).Rows(i).Item("Appname"), ApplicationList.Tables(0).Rows(i).Item("ID"), ApplicationList.Tables(0).Rows(i).Item("AppOrder"))
                '================================================
            Next


            For i = 0 To AppListOrderGridView.ColumnCount - 1
                AppListOrderGridView.Columns(i).AutoSizeMode = System.Windows.Forms.DataGridViewAutoSizeColumnMode.AllCells
                AppListOrderGridView.Columns(i).SortMode = System.Windows.Forms.DataGridViewColumnSortMode.NotSortable
            Next

            AppListOrderGridView.Columns("OrderID").Visible = False
            AppListOrderGridView.Columns("ApplOrder").Visible = False


            AppListOrderGridView.Columns("ApplName").AutoSizeMode = System.Windows.Forms.DataGridViewAutoSizeColumnMode.Fill

Select allOpen in new window

Just see where my code comments are and you'll see how I tried to add this combo-box control in my grid.

Any suggestions?
ErrorMessage.png