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5.52 How can I prevent my user from sizing columns in my datagrid
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You can do this by subclassing your grid and overriding OnMouseMove, and not calling the baseclass if the point is on the columnsizing border.
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public class MyDataGrid : DataGrid
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protected override void OnMouseMove(System.Windows.Forms.MouseEventArgs e)
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DataGrid.HitTestInfo hti = this.HitTest(new Point(e.X, e.Y));
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if(hti.Type == DataGrid.HitTestType.ColumnResize)
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return; //no baseclass call
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Protected Overrides Sub OnMouseMove(ByVal e As System.Windows.Forms.MouseEventArgs)
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Dim hti As DataGrid.HitTestInfo = Me.HitTest(New Point(e.X,e.Y))
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If hti.Type = DataGrid.HitTestType.ColumnResize Then
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Return 'no baseclass call
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The above code prevents the sizing cursor from appearing, but as Stephen Muecke pointed out to us, if the user just clicks on the border, he can still size the column. Stephen's solution to this problem is to add similar code in an override of OnMouseDown.
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protected override void OnMouseDown(System.Windows.Forms.MouseEventArgs e)
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DataGrid.HitTestInfo hti = this.HitTest(new Point(e.X, e.Y));
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if(hti.Type == DataGrid.HitTestType.ColumnResize)
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return; //no baseclass call
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Protected Overrides Sub OnMouseDown(ByVal e As System.Windows.Forms.MouseEventArgs)
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Dim hti As DataGrid.HitTestInfo = Me.HitTest(New Point(e.X,e.Y))
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If hti.Type = DataGrid.HitTestType.ColumnResize Then
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Return 'no baseclass call
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Windows Forms-Datagrid
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