Datagridview row painting behaves abnormally

Question

0.00/5 (No votes)

See more:

I have a DataGridView on my form which is plain .net winform control (not customized).
Just above the grid I have a Combobox control.

Grid is populated with some data bound to a BindingSource.

When user expand the combo-box, and selects an item, the visible combo-box list disappears. At this point, a snapshot of combo-box list remains painted on top row in DataGridView.

I don't know if this information is enough to describe the issue. I am not finding an option to attach snapshots of the form, so that problem would be more clear. If any such option is available on codeproject, please let me know, I will upload the snaps.

Also, it was working perfectly just an hour ago.

What I have tried:

1. Tried debugging DataGridView's painting event, but found no issues.
2. Set double buffered to true, but no help.
3. Reset binding source attached to datagridview, again no help.

Posted 8-Oct-18 4:00am

Member 11040029

Updated 8-Oct-18 4:25am

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

OriginalGriff · Answer 1 · 2018-10-08T04:26:00

Solution 1

Check the various paint event handlers for your DGV - I have no idea which ones you are handling, but there are quite a few candidates.

I've never seen a DGV messed up by and external control unless there is a mistake in a paint handler.

Posted 8-Oct-18 4:26am

OriginalGriff

Comments

Member 11040029 8-Oct-18 11:02am

yeah right Griff, it's never messy. I am not handling any paint event handlers. Infact not handling any event for the grid. It is just tied to binding source.

OriginalGriff 8-Oct-18 11:14am

Strange. Two things: How up to date are your graphics drivers? (Grasping at straws here.) And have you tried Invalidating the DGV?

Member 11040029 9-Oct-18 6:19am

Graphics are up to date. Yes tried Invalidating...didnt work.