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Visual Basic - Add line(s) on individual rows in datagridview - Flickering
I have a datagridview in my application (at this moment Visual Basic 2008, but in the near future Visual Basic 2010) and I want to create line(s) in individual rows.
At this moment I use the following code:
It works fine, but I have one problem:
The line(s) are 'flickering' on my screen. I know it happened by the CellPainting, but I don't know how to fix that. Does anyone know how to fix that?
At this moment I use the following code:
Private Sub datagridview1_CellPainting(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellPaintingEventArgs) Handles datagridview1.CellPainting
Dim row As DataGridViewRow = datagridview1.Rows(e.RowIndex)
Dim BackColorBrush As New SolidBrush(e.CellStyle.BackColor)
Dim GridBrush As New SolidBrush(Me.datagridview1.GridColor)
Dim GridLinePen As New Pen(GridBrush)
' -- Erase the cell
e.Graphics.FillRectangle(BackColorBrush, e.CellBounds)
Dim ProgressBarBrush As New SolidBrush(Color.Black)
Dim CellProgressBarRect As New Rectangle(e.CellBounds.X, e.CellBounds.Y, e.CellBounds.Width, 2)
e.Graphics.FillRectangle(ProgressBarBrush, CellProgressBarRect)
e.Handled = True
Dim style As New DataGridViewCellStyle
style.Font = New Font(datagridview1.Font, FontStyle.Bold)
datagridview1.Rows(e.RowIndex).DefaultCellStyle = style
End Sub
It works fine, but I have one problem:
The line(s) are 'flickering' on my screen. I know it happened by the CellPainting, but I don't know how to fix that. Does anyone know how to fix that?
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HI,
This could help
This could help
Public Sub SuspendLayout
'Usage
Dim instance As Control
instance.SuspendLayout
' your code
instance.ResumeLayout
Thank you for your answer! Can you be a little bit more specific?
What do I have to do with my cellpainting code?
The datagridview is filled by a sql query (fill a datatable). I added columns manually and connect the datagridview to a datatable (datasource = datatable) in the form_load.
What do I have to do with my cellpainting code?
The datagridview is filled by a sql query (fill a datatable). I added columns manually and connect the datagridview to a datatable (datasource = datatable) in the form_load.
Hi,
You can try SuspendLayout () before initializing your form and ResumeLayout () after initialization. Sometimes this doesn't work. When it doesn't, you can try using the Win32 functions:
Outside of your method:
using Microsoft.Win32;
using System.Runtime.InteropServ
[DllImport("user32.dll")]
public static extern int SendMessage(IntPtr hWnd, Int32 wMsg, bool wParam, Int32 lParam);
private const int WM_SETREDRAW = 11;
Before drawing:
SendMessage(ObjectControlP
After drawing:
SendMessage(ObjectControlP
You may then need to call Refresh ().
refer to http://www.c-sharpcorner.com/Forums/Thread/52/
Regards
You can try SuspendLayout () before initializing your form and ResumeLayout () after initialization. Sometimes this doesn't work. When it doesn't, you can try using the Win32 functions:
Outside of your method:
using Microsoft.Win32;
using System.Runtime.InteropServ
[DllImport("user32.dll")]
public static extern int SendMessage(IntPtr hWnd, Int32 wMsg, bool wParam, Int32 lParam);
private const int WM_SETREDRAW = 11;
Before drawing:
SendMessage(ObjectControlP
After drawing:
SendMessage(ObjectControlP
You may then need to call Refresh ().
refer to http://www.c-sharpcorner.com/Forums/Thread/52/
Regards
I tried this methods and it changes nothing unfortunately.
The flickering ("winking") still exist in the line(s).
The flickering ("winking") still exist in the line(s).
Can you show us a screenshot so we see what is the outcome of above code?
One change you can make immediately and which might help is to remove the last 3 lines and add following to form_load
datagridview1.Rows(e.RowIn
One change you can make immediately and which might help is to remove the last 3 lines and add following to form_load
datagridview1.Rows(e.RowIn
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