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I've got some code in my parent form's MdiChildActivate sub, but I've noticed that it doesn't report me.mdichildren.count accurately (at least within that sub). When I open a new child form, the...

Sorry, what error?

(Edit: Right, the one in the OP. Yeah, it's better to rewrite than to keep banging your head against that wall.)

I'm afraid dunfiddlin is right; while you could do everything manually like you're doing now, it's going to be longer, more error-prone, and especially a lot slower than if you just use data binding....

(I just went ahead and changed null values to false in the cellformatting event.)

I've got a datagridview populating from a database and, there's no way around it, the database will sometimes return null values in a boolean column, and I get the following error:



I tried...

No dice; that only seems to change the null value of text cells.

Quick formatting question: My datagridview's image columns display the broken-image picture if there's no image. How can I make them just display nothing instead?

Deleting the bin and obj files did it. Thanks!

OK. (It's short as I only use settings for login information.)


'------------------------------------------------------------------------------
' <auto-generated>
' This code was generated...

Good idea. But it didn't work.

Naming conflicts as in something else called "username"? I know it's not that; I've tried renaming the settings and no dice.

My application is giving me this error when it starts:



It's this bit of the settings designer file that's messing it up:


<Global.System.Configuration.UserScopedSettingAttribute(),...

Well, got a week-old backup. Could be worse.

Well, this error is not anything I want to see:



I'm in the process of converting a project from SDI to MDI and something seems to have gone terribly wrong with one of my forms in the process. ...

I can add a new row to the end of a datatable in one line:


MyTable.Rows.Add(FirstValue, SecondValue, etc)

But if I want to just create a new row, all the examples I've seen add each field one...

Obviously that's not what's happening because a) this subroutine specifically never hides a tabpage and b) I can click to other tabpages, which display normally--not displaying the assessment...

Last tabcontrol-related question, I promise.

So last time I was having visibility issues with this subroutine and now those have been sorted out, but I still have another issue. When I click over...

I'd like a little clarification. It sounds like you want the text in form2.textbox1 to be:



But the trouble is that the two If statements you've written above can't both be true at the same...

...Yes?

Here's my designer file.

100565

This is clever and I totally thought that was going to be it! However...

100561

I can use the arrow keys to change the checked radio button, as normal.

It switches it to being visible but disabled:


Public Sub Conceal(ByVal concealedObject As Object)
'either hides or disables the object depending on the setting
If...

I swear to God, I am using the tab key and the tab key only. Here is a video.


http://www.youtube.com/watch?v=mo3k-XhzxxI&feature=youtu.be

Paul: You're right; so now the question is, why are...

That's OK, does anyone else have any ideas?

I also did this:


MessageBox.Show("The parent of WindYes is: " & WindYes.Parent.Name.ToString & vbCrLf & "The parent of WindNo is: " & _
...

Behold the impossible!

100539

The radio buttons are all in the same container and otherwise behave completely normally. Here's another screenshot highlighting behavior that, if I understand...

Second the Notepad clone idea; just mastering the basic four menu items (New, Open, Save, and Exit) will get you a long way.

Every beginner should make tic-tac-toe. Start with a two-player...

Figured this out; in case anyone's wondering, here's how:


Dim saveFileDialog1 As New SaveFileDialog()
'checks the Excel version
Dim XLApplication As Excel.Application
...

I fully appreciate the relationships in a tab control, but the subroutine is recursive, so it applies to children, grandchildren, great-grandchildren, great-great-grandchildren, etc.

And why does...

I'm using this subroutine to recursively toggle disabled/invisible state for a control and its children:


Public Sub ConcealObject(ByVal Parent As Control)
For Each C As Control...

That first one works perfectly, although I'm not exactly sure how.

I want to make a single-select listbox deselect the selected item when you click on it (like a simple multiselect, except that only one item can ever be selected). Is there a simple way to do this? ...

Not sure I follow. When I try to tab through the top (red-circled) container, tabbing does what you say. But when I tab through one of the green-circled containers, tab goes through every radio...

Yes, but the weird part is it doesn't do it for all of them. The controls circled in green do what I want (tab goes through all of them regardless of checkstate). I'm trying to figure out why those...

That's a really handy tool, but the trouble is that the tab order it displays doesn't match the behavior. The radio buttons at the top are 0.0.0.0, 0.0.0.1, 0.0.0.2, 0.0.0.3, 0.0.0.4, and 0.0.0.5,...

Huh, good to know ("tab index" is a somewhat deceptive name then, but that's neither here nor there). Of course that leaves it a total mystery why my controls are behaving the way they are.

In my...

I thought tab index was inherited, ie, it goes to the container, then through all the contents of the container in order, and then on to the next container? Anyway that's how the rest of it is...

I've got several sets of radio buttons: Some inside a top-level groupbox, some inside lower-level groupboxes, and some on the form. All of them have their tab indices set appropriately and the...

dday: The problem is that the subroutine is handling multiple listboxes and I need to find the label that goes with that particular listbox.

dunfiddlin: That'll work. I thought about putting them...

I've got some listboxes with labels on them and I want the label above each listbox to be hidden when the listbox is hidden. Right now I'm giving them matching tags and then just looping to search...