Datagridview Virtual Mode property

Srinivas kadiyala

I have a datagridviewcombobox column, which works well only when the VirtualMode property is false. Otherwise, the value selected from the list will not be displayed in the column. This is added like this

DataGridViewComboBoxColumn colCategory = new DataGridViewComboBoxColumn();

colCategory.Name = Consts.DATAGRID_CATEGORY;

colCategory.DataPropertyName = Consts.DATAGRID_CATEGORY;

colCategory.HeaderText = Consts.DATAGRID_CATEGORY.ToString();

colCategory.SortMode = DataGridViewColumnSortMode.Automatic;

colCategory.Items.AddRange(new string[] { "Subsystem", "Library", "Unknown", "Hole" });

this.dgBudgetInfo.Columns.Insert(1, colCategory);

Also, I am generating the serial no automatically like this:

private void dgBuildFile_NewRowNeeded(object sender, DataGridViewRowEventArgs e)

{

this.dgBuildFile.Rows[this.dgBuildFile.Rows.Count - 1].Cells[0].Value = this.GetNewSlNo();

}

This works only when the VirtualMode property is set to true.

BTW, I cannot take an AutoIncrement column for various other reasons.

Is there any workaround to achieve both of them in the same datagrid?

4 Replies

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Vugar17y ago
You can use autoincrement without virtualmode ----------------- Private Sub DataGridView1_RowPostPaint(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewRowPostPaintEventArgs) Handles DataGridView1.RowPostPaint Using b As New SolidBrush((DirectCast(sender, DataGridView)).RowHeadersDefaultCellStyle.ForeColor) e.Graphics.DrawString((e.RowIndex + 1).ToString(System.Globalization.CultureInfo.CurrentUICulture), e.InheritedRowStyle.Font, b, e.RowBounds.Location.X + 20, e.RowBounds.Location.Y + 4) End Using End Sub
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Bechir Bejaoui18y ago
is your code embedded with a loop or used in a recursive context?
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Srinivas kadiyala18y ago
Thanks for the suggestion.

But it works only for the first row. After I enter one row and go to the new row it doesn't work. Any reasons for this behavior??
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Bechir Bejaoui18y ago
If you want both contexts at once, you can play on the Virtual mode it self, I mean Before executing the code that needs Virtual mode set to true then you set datagridview.Virtualmode = true; and just after the code you reset datagridview.VirtualMode = false; you can swap the mode between codes

datagridview.VirtualMode = true;
//Your code
datagridview.VirtualMode = flase;

like that
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