VB.net - Dynamically created column with an Image not displaying image in new row in datagridview

Question

I am building a grid dynamically and want to have a delete image as the last displayed column.

The image displays fine on the row I add, but the new row doesn't have the image. What am I missing?

When I run the following code I get one row with the image and a second empty row with the 'missing image' icon:

Public Class Testing
Private dtData As New DataTable

Private Sub Testing_Load(sender As Object, e As EventArgs) Handles MyBase.Load
    LoadMyGrid()
End Sub

Private Sub LoadMyGrid()
    Try


        Dim img As New DataGridViewImageColumn
        Dim inImg As Image = My.Resources.delete
        img.Image = inImg

        dtData.Columns.Add("LanguageId")
        dtData.Columns.Add("Language")
        dtData.Rows.Add(1, "English")

        '--- Load the grid
        With Me.dgv1
            .Columns.Clear()

            .DataSource = dtData
            .Columns(0).Visible = False

            dgv1.Columns.Add(img)
            img.Width = 40
            img.Name = "DELETE"

            .ClearSelection()
        End With
    Catch ex As Exception
        MsgBox("You hit an error")
    End Try
End Sub

End Class

Thanks for any help!

score 0 · Answer 1 · answered Aug 25 '15 at 16:13

Add a variable to store the position of the DELETE column
```
   Private dgv1DeleteCellIndex as integer = -1
```
In the LoadGrid, set the dgv1DeleteCellIndex, locate this before the add of the DELETE column
```
   dgv1DeleteCellIndex = dgv1.Columns.Count
```

After the add of the DELETE column loop through the columns and set the cell value to the image

For Each row As DataGridViewRow In dgv1.Rows
   row.Cells(dgv1DeleteCellIndex).Value = My.Resources.delete_16x16
Next

Update the cell image on RowsAdded event to continue to update the image on any additional new rows added by the user.

Private Sub dgv1_RowsAdded(sender As Object, e As System.Windows.Forms.DataGridViewRowsAddedEventArgs) Handles dgv1.RowsAdded
   If dgv1DeleteCellIndex <= 1 Then Exit Sub

   CType(sender, DataGridView).Rows(e.RowIndex).Cells(dgv1DeleteCellIndex).Value = My.Resources.delete_16x16
End Sub

VB.net - Dynamically created column with an Image not displaying image in new row in datagridview

1 Answers1