Tooltip for the Text Inside a DGV Cell

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Hello All,

This is my first post on this site, finally after having tried all of my resources I just want to know if what I want to do is possible.

Before this post gets flagged for duplication I want to mention a specific detail. Let me explain below (why it isnt a duplicate post!):

I currently have places in my application where, if the user hovers over certain text inside a RICHTEXTBOX, depending on if he hovers over a certain key word inside the control, a tooltip is displayed.

Now, they have asked me to implement this same type of functionality, for one of the datagridviews that we have, where inside a certain column, the cells of that column should have this same functionality of mouse hover on a certain key word inside the cell.

Usually, you only have the hover functionality(tooltip) for the whole cell content and as far as I know, it is not available for individual Key words inside a cell.

All I want to know is that, is there a feasible way to do what I need to do?
Aditionally, I am working on windows forms application under VB.net.

All help is appreciated.
Thank you!

Posted 11-Sep-15 3:58am

Member 11169882

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OriginalGriff · Accepted Answer · 2015-09-11T04:43:00

Solution 1

There's no "standard" way to do that, but (although I haven't tried) it shoudl be possible.
There is a DataGridView.CellToolTipTextNeeded Event[^] which allows you to set the ToolTip text "on the fly". The complication will be working out which word you are over!
That's probably going to need a bunch of calls to MeasureString and a degree of trial and error to get right.

But yes, with some effort it should be possible.

Posted 11-Sep-15 4:43am

OriginalGriff

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OriginalGriff 11-Sep-15 11:10am

Something similar will probably work - except there is no "Get word under mouse" function for DGVCells.
There is a GetCharIndexFromPosition function for textboxes though, and you might be able to use that if you "fake" a displayed textbox with the same dimensions, font, alignment, and text as the cell. I haven't tried that, so I don't know how well it would work, but it's probably worth a try given how much of a PITA it is to get MeasureString to be accurate for all fonts.

Member 11169882 11-Sep-15 11:19am

Okay, that sounds like a plan. Ill accept you solution! :D thanks

Member 11169882 11-Sep-15 11:20am

yes the getwordunermouse was my own function which uses getcharindexfromposition

Member 11169882 11-Sep-15 11:05am

Thanks for your comment sir, indeed, the hardest part is getting the word under the mouse for which I had developed a special function that worked with RichTextBoxes, I would pass in my richTextBoxControl as sender, and then pass in the point (as drawing point) which I had obtained using PointtoClient.

Here is some code exerpt for demonstration: the

If CType(sender, STCRichTextBox).Name = "StcRichTextBoxEnglish" Then
'ToolTip1.RemoveAll()
Dim point As New Point(StcRichTextBoxEnglish.PointToClient(Cursor.Position).X, StcRichTextBoxEnglish.PointToClient(Cursor.Position).Y)
curWord = StcRichTextBoxEnglish.GetWordUnderMouse(CType(sender, System.Windows.Forms.RichTextBox), point)
ElseIf CType(sender, STCRichTextBox).Name = "StcRichTextBoxFrench" Then
'ToolTip1.RemoveAll()
Dim point As New Point(StcRichTextBoxFrench.PointToClient(Cursor.Position).X, StcRichTextBoxFrench.PointToClient(Cursor.Position).Y)
curWord = StcRichTextBoxFrench.GetWordUnderMouse(CType(sender, System.Windows.Forms.RichTextBox), point)
End If

Im wondering that if something similar is possible with a cell, then I might end up giving it a shot. So far I have been out of luck.

If you have some insigths regarding this, do let me know. For now I will see how far I get lol!

Again, really appreciate your comment and help. Cheers