how to call a paint event programtically data grid

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I just want some cells be selected to put a graphic design. If I able to call the paint event may sort out the problem contains the code to draw graphic.

The problem is after loading the form only the last cell selected shows the graphics. Any ideas

Posted 29-Aug-12 0:30am

Reji Ab

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Pablo Aliskevicius · Answer 1 · 2012-08-29T00:49:00

Solution 1

Winforms controls expose a method name Refresh().
Try it.

Posted 29-Aug-12 0:49am

Pablo Aliskevicius

Comments

Reji Ab 29-Aug-12 7:02am

It didn't work for me

Aarti Meswania · Answer 2 · 2012-08-29T00:58:00

Solution 2

for calling paint event pragmatically use,

VB

DataGridView1.Invalidate()

Happy Coding!
:)

Posted 29-Aug-12 0:58am

Aarti Meswania

Updated 29-Aug-12 0:59am

v2

Comments

Reji Ab 29-Aug-12 7:34am

I want to call the paint event in the load event of the form. Invalidate doesn't call the paint event in the load event of the form

Aarti Meswania 29-Aug-12 7:45am

may paint event is not giving desire output for,
"only the last cell selected shows the graphics"
control's invalidate always fire control's paint event
you can test your paint event code, put a button on form
onclick call grid.invalidate()
it will fire paint event.
after loading form click on that button if it still giving same view it means something wrong in paint event.

Reji Ab 29-Aug-12 8:48am

There nothing wrong in the paint event. It works well after loading the form. I debug the code , it doesn't goes to the paint event when it executes invalidate in the form load event

[no name] 29-Aug-12 9:35am

Why would you expect it to? There is nothing to paint in a form load.

Reji Ab 29-Aug-12 10:59am

I want to paint the grid in form load event. Below is the bit of code in the load event. I want execute the paint event of the grid in the line "DbgridView.InvalidateCell(DbgridView.CurrentCell)"

For Each dr In dt.Rows If irow >= iTotalrows Then DbgridView.Rows.Add(1) End If DbgridView.Item(iColumn, irow).Value = dr("CT_DESC") If Not IsDBNull(dr("Assigned_Code")) Then selection = True rcdraw = DbgridView.GetCellDisplayRectangle(iColumn, irow, False) DbgridView.CurrentCell = DbgridView.Item(iColumn, irow) DbgridView.CurrentCell.Selected = True DbgridView.InvalidateCell(DbgridView.CurrentCell) End If irow = irow + 1 ' Exit Sub Next

[no name] 29-Aug-12 11:17am

It does not matter. There is no grid to paint in the form load event. You can write "Invalidate" all day long it's not going to happen. There is no grid to paint, there is no grid column to paint and there are no cells to paint. You can only paint something that already exists and has been displayed.

Reji Ab 1-Sep-12 14:06pm

Your reply is wrong there is grid in the form. I found the solution
just call application.doevents() after invalidate then it fire the paint event. No need to wait for whole day

[no name] 1-Sep-12 14:11pm

Actually you are wrong. Good luck keeping a job writing code like that.

Reji Ab 1-Sep-12 15:03pm

What is wrong? . Same to you as well