Hi experts, I am a student working on a project for my company. I work using Microsoft Visual Studio 2005. Language is vb.net. I also work using windows application. I have a form(EmailContacts) which contains a datagridview and a button to add the data to a textbox of another form. Everything is working fine and i can display data from the database on the datagridview properly. The problem is how do i add a 'Select All' feature such that when the user clicked once on the 'Select All' checkbox, all the checkboxes of the columns are selected?

Adding the 'Select All' feature in the datagridview. When the user clicked once on the 'Select All' checkbox, all the checkboxes of the columns are selected. A hierarchical database model is a data model in which the data are organized into a tree-like structure. The data are stored as records which are connected to one another through links. A record is a collection of fields, with each field containing only one value.

I've already tried it by inserting that method in a button. So when i click the button, it will the select all. The problem is when i click that button, it select all the rows by highlighting and that is not i wanted. What i planned to do is to insert a checkbox on top of the Selection column or insert a button that can tick all the checkboxes. Private Sub CheckBox1_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CheckBox1.CheckedChanged Dim i As Integer Dim SelectedWays SelectedWays = 0 For i = 0 To WPGrid.RowCount - 1 If CheckBox1.Checked = True Then WPGrid.Item(0, i).Value = True SelectedWays = SelectedWays + 1 Else WPGrid.Item(0, i).Value = False End If Next TextBox3.Text = SelectedWays End Sub This code will check/uncheck all check the boxes in the first column and put the total count in a textbox. That part works great. The problem I am having is with some code that counts them if a single box is checked.

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Private Sub WPGrid_CellMouseUp(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellMouseEventArgs) Handles WPGrid.CellMouseUp SelectedWays = 0 Dim i For i = 0 To WPGrid.Rows.Count - 1 If WPGrid.Item(0, i).Value = True Then SelectedWays = SelectedWays + 1 End If Next TextBox3.Text = SelectedWays ShowWaypoint() End Sub The problem is this code wont count the box that was just checked until you pick another cell in the grid. I have tried doing it in a CellValueChanged() routine but either one does the same thing. You can check/uncheck the same box over and over and it will never count it until you select another cell. For some reason it won't count the currently selected cell. Edited 8 Years Ago by mmosoul: n/a. Problem solved. I just have it select the next column after the checkbox is checked then have it count the checkboxes in a CurrentCellChanged() subroutine.

Problem solved. I just have it select the next column after the checkbox is checked then have it count the checkboxes in a CurrentCellChanged() subroutine.