DatagridView Tutorial with DataGridViewCheckBoxColumn
The best way to set a Yes No entry inside a DataGridView is the use of a DataGridViewCheckBoxColumn. The user could activate or disable a value by checking it.
Lesson 6: Using DataGridViewCheckBoxColumn
From the Visual Basic form Designer, simple add a column and make sure you choose the DataGridViewCheckBoxColumn type. Named your column like cActivate and give a good description like ACTIVATE.
Because the checkbox is no ordinary cell, I have to detect it.
The easiest way is by getting the column index. Here is a very short example and I highlighted the important part. Using a regular if condition, if the column index from the CellMouseClick is the same number of the cActivate index, then we got our DataGridViewCheckBoxColumn object.
I use the previous sample project to make this example. Please not that there is no VALUE or property to get the cell value. You need to use EditedFormattedValue or EditingCellFormattedValue. In this case and in most case, is exactly the same thing.
Download the sample project
All the functions and the step use in this post are inside the sample project. Fell free to take a look at it. When you start the sample project, an initial DataGridView will be filled with random numbers. A save function is called if you close the WinForm.
When you click on a button inside the DataGridView, you will notice it will change color to yellow.
Private Sub DataGridView1_CellMouseClick(sender As Object, e As System.Windows.Forms.DataGridViewCellMouseEventArgs) Handles DataGridView1.CellMouseClick If e.Button = Windows.Forms.MouseButtons.Right Then Me.Text = ("[" & e.RowIndex & " ; " & e.ColumnIndex & "]") Dim pt As Point = MousePosition ContextMenuStrip1.Show(pt) ElseIf e.Button = Windows.Forms.MouseButtons.Left Then Dim dgvbc As DataGridViewButtonCell Dim dgvbcb As DataGridViewCheckBoxCell If e.RowIndex >= 0 AndAlso e.ColumnIndex >= 0 Then If e.ColumnIndex = cButton.Index Then dgvbc = Me.DataGridView1.Rows(e.RowIndex).Cells(e.ColumnIndex) dgvbc.FlatStyle = FlatStyle.Flat dgvbc.Style.BackColor = Color.Yellow dgvbc.Selected = False ElseIf e.ColumnIndex = cActivate.Index Then dgvbcb = Me.DataGridView1.Rows(e.RowIndex).Cells(e.ColumnIndex) MsgBox(dgvbcb.EditedFormattedValue) End If End If End If End Sub |
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