C++ Controls in VB? - Visual Basic Discussion Boards

Thomas Stockwell30-Jun-08 11:56

30-Jun-08 11:56

Well the painless solution would be to jump over the WinAPI cliff and plunge into the fiery depths of Microsoft Windows and trudge through the mountains of commands until you find the correct solution. Or you could google, or you could wait for another more useful response Smile | :)

Regards,
Thomas Stockwell

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Re: Instant CPU Utilization Value

NeilPrice1-Jul-08 4:38

NeilPrice

1-Jul-08 4:38

Thanks for the answer Thomas. I wanted to trudge through the WinAPI to find something but even with googling didn't really find a good place to start. I ended up coming up with a tiny service app that runs on the computer and tracks CPU Utilization using the counter sampling then responds on a tcp port to a request for the current value. Probably overkill but it beat not having a solution Smile | :)

Timer Question

DCAUB30-Jun-08 10:13

DCAUB

30-Jun-08 10:13

Hello,

I have a question timer based. It is a little bit stupid i think but i dont know how i can do it.

I have a Database SQL 2005 in that database there is the following:

ID
Website
Time

So what i need to do, i have to read from the database the first record. the Website that is in there need to be showed for the time that is also read.
After this time the next website must be showed for the next time.When the table read to the end the first record must start again.

I need to have this for showing web pages the one after the other.

I have tried to realise it with Timer function but i didnt managed it to do it.

What i did, in the first timer function i read the record , i showed the webpage.then i stoped the first timer and enabled the second timer with the correct time.After the elapsed time i disable the second timer and enabled the first timer again.

But it seems that there is no stop between the records so the last record is always showed.

I tought when i set Timer1.enabled=false that it stoped at the position is has reached and after enabled it again it wil go further but this is not correct.

Does anyone have a solution. I dont see it anymore. It is a very stupid problem i think but i dont find a solution.In older programming soft like Qbasic there was a command like Pause or wait for x seconds. But i dont find something like that in VB 2005

Thanks

DCA
didiercauberghe@hotmail.com

Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
Dim cnpresentatie As New SqlConnection(connectionstring)
Dim cmdalgemeen As New SqlCommand

cnpresentatie.Open()

Dim strQuery As String = "select * from presentatie order by id" ' order by volgorde"
Dim myCommand As New SqlCommand(strQuery, cnpresentatie)
Dim myReader As SqlDataReader = myCommand.ExecuteReader()
While (myReader.Read())
WebBrowser1.Navigate(myReader.GetString(1)) ' volgnummer = hoogste volgnummer per hotel zit op positie 13 in database
Timer2.Interval = myReader.GetValue(2) * 1000
Timer1.Enabled = False
Timer2.Enabled = True

End While
myReader.Close()
cnpresentatie.Close()

'Einde opzoeken kamernummers

End Sub

Private Sub Timer2_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer2.Tick
Timer2.Enabled = False
Timer1.Enabled = True
End Sub

Re: Timer Question

Luc Pattyn30-Jun-08 10:41

Luc Pattyn

30-Jun-08 10:41

Why would you need two timers? Do it with a single one...
Hou het simpel.

Smile | :)

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Re: Timer Question

DCAUB30-Jun-08 12:26

DCAUB

30-Jun-08 12:26

The reason i used 2 Timers is because i tought i could stop the proces, the while wend loop and so block the next record until the time was up.

Any ideas, smaal example if possible.

thanks

DCA

Re: Timer Question

Luc Pattyn30-Jun-08 12:35

Luc Pattyn

30-Jun-08 12:35

Hi,

I would use a single Windows.Forms.Timer that runs at say 1 second intervals all the time, always
enabled; plus a single variable (say Duration) that keeps the remaining time (in seconds)
for the current item.

in the Tick handler:
1. decrement Duration
2. if it becomes zero/negative:
- read the next record in the Database
- load the new item to show/play/whatever
- set Duration to its required value

That's about it.

Smile | :)

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Re: Timer Question

DCAUB30-Jun-08 20:19

DCAUB

30-Jun-08 20:19

Thanks. for the advice.

This is how i will try to do the thing.

Thanks

DCA

C++ Controls in VB?

Saul Johnson30-Jun-08 8:19

Saul Johnson

30-Jun-08 8:19

Hi Everybody!

Being a little bit inexprienced in the .NET Toolbox controls department, i keep stumbling across wonderful C++ Controls and components, only to download them and find that all i get is two .cpp files that i can't figure out how to integrate (if it is ppossible at all) into my vb project.

Is it possible to add C++ Controls to a VB Project, and if so, how?

Thanks Everybody!

MrWolfy Big Grin | :-D

Re: C++ Controls in VB?

Kenny McKee30-Jun-08 8:59

Kenny McKee

30-Jun-08 8:59

compile the control(s) into a class library, and then load the resulting .dll file into your VB app. I'm sure someone else will give you a more detailed explaination.

How many bytes of text have I typed in my lifetime??? Man, I wish I kept track...

MenuStrip control searching by menue name

Georg Kohler30-Jun-08 8:06

Georg Kohler

30-Jun-08 8:06

This should be an easy one .. But I've been struggling all night over this ...

- I'm adding menu items during runtime (keeping track of open files)
- I can add the handler for the menu click event - that works ..

Question:
- How can I search / locate for the "newly" added menuitem just by its Menue NAME
[untitled(1)] as an example
- Is the best approach the use of a hash table ? (indexed by menu location ?)
(I haven't tried this yet)
- You would think there is an easy way of searching for the menu name direct ???

Here is how I'm adding the neue menu Item:

MenuName = "untitled(1)" ' Assigne window name
<pre>WindowsToolStripMenuItem.DropDownItems.Add(MenuName) ' add new created window to menue

Any ideas

Thanks

georg

Re: MenuStrip control searching by menue name

Thomas Stockwell30-Jun-08 11:12

Thomas Stockwell

30-Jun-08 11:12

The best solution would be to name every menu item both uniquely and meaningful. Then iterate through each menu in the menu system for the particular name.

Re: MenuStrip control searching by menue name

Georg Kohler30-Jun-08 11:38

Georg Kohler

30-Jun-08 11:38

Thats what I'm trying to do - but I can not figure out what "function" actually lets you
find an existing menu name based on a string

Any idea how to actually do it ?

Indexof / find/ index/ compare and so on have not worked for me (I might not call the correct menu tree

as an example:

WindowName = "untitled(1)"

test = WindowsToolStripMenuItem.DropDownItems.Find(WindowName, True)

does not work ????

Where [WindowsToolStripMenuItem] is the actual menu that contains the menuitems

I most be doing something wrong Confused | :confused:

Georg

Re: MenuStrip control searching by menue name

Thomas Stockwell30-Jun-08 11:51

Thomas Stockwell

30-Jun-08 11:51

FYI, if the function doesn't already exist then create the function

pseudocode:

foreach menuitem in windowstoolstripmenuitem.dropdownitems
{
if(menuitem.name=='search criteria' OR menuitem.name.contains('search criteria')
return correct;
else
return incorrect;
}

Re: MenuStrip control searching by menue name

Scott Dorman30-Jun-08 15:58

Scott Dorman

30-Jun-08 15:58

You need to make sure you're actually setting the "Name" property and not the "Text" property. They are different and independent of one another and typically when you create a new menu item you are setting the "Text" property.

Scott Dorman

Microsoft® MVP - Visual C# | MCPD
President - Tampa Bay IASA

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Re: MenuStrip control searching by menue name

Georg Kohler30-Jun-08 16:13

Georg Kohler

30-Jun-08 16:13

Good point - but I believe I did try this also last night as I changed the search String from "untitled(1)" to "untitled(1)ToolStripMenuItem" = added [ToolStripMenuItem] to the text property the same way as VB 2008 is doing it when you create a menuitem ...

But I'll check again tonight Smile | :)

Georg

Re: MenuStrip control searching by menue name

Scott Dorman30-Jun-08 18:08

Scott Dorman

30-Jun-08 18:08

I just verified on MSDN[^], the call you are making

WindowsToolStripMenuItem.DropDownItems.Add(MenuName) ' add new created window to menue

will add a new ToolStripMenuItem whose text is the value of the string MenuName.

You have two choices:

1. The Add method returns the actual ToolStripItem that was just added, so you can take that instance and assign a value to the Name property. To do this it would be something like this:

ToolStripItem item = WindowsToolStripMenuItem.DropDownItems.Add(MenuName)
item.Name = MenuName

2. Create the ToolStripItem first and then add it to the collection:

ToolStripItem item = new ToolStripItem(MenuName)
item.Name = MenuName
WindowsToolStripMenuItem.DropDownItems.Add(item)

Scott Dorman

Microsoft® MVP - Visual C# | MCPD
President - Tampa Bay IASA

[Blog][Articles][Forum Guidelines]

Hey, hey, hey. Don't be mean. We don't have to be mean because, remember, no matter where you go, there you are. - Buckaroo Banzai

Re: MenuStrip control searching by menue name

Georg Kohler30-Jun-08 21:38

Georg Kohler

30-Jun-08 21:38

This got me going ... not everything is working yet , but I was able to search based on a string

Your where correct in that I had to set the .name also

Thanks a lot

Re: MenuStrip control searching by menue name

Scott Dorman30-Jun-08 22:44

Scott Dorman

30-Jun-08 22:44

You're welcome. Glad it going you heading in the right direction.

Scott Dorman

Microsoft® MVP - Visual C# | MCPD
President - Tampa Bay IASA

[Blog][Articles][Forum Guidelines]

Hey, hey, hey. Don't be mean. We don't have to be mean because, remember, no matter where you go, there you are. - Buckaroo Banzai

VB.Net 3D in wpf

cristi2go30-Jun-08 7:07

cristi2go

30-Jun-08 7:07

Hello

I have a VB.Net project which is a WPF Windows App. I took the XAML code sample from the MSDN page 'Viewport3D class', and I wrote the VB.Net version of it. I placed the Viewport3D control by code, as in the C# sample located on the same webpage.

The compilation of the VB code had no errors. However, the control in question does not appear on the form, while the C# version worked just fine.

The question I have is: Is there something I could do to solve this or is it the 3D WPF feature which does not work for VB ?

Th answer would be very helpful for me.

Thanks

Re: VB.Net 3D in wpf

Thomas Stockwell30-Jun-08 11:15

Thomas Stockwell

30-Jun-08 11:15

Whatever is programmed in C# can be done in VB, regardless of the XAML used (XAML would not have to be converted in this instance). Since I am assuming you were looking at both codes at the same time, I would assume you missed an important chunk.

Re: VB.Net 3D in wpf

cristi2go1-Jul-08 6:09

cristi2go

1-Jul-08 6:09

Thank you for the answer.

However, I am new to the WPF technology and would need a hint on what to do with the code I wrote. It is based on the XAML code, because I intend to obtain the same result by procedural code, instead of the designer one. That is, I could deliver you the VB code or even the entire project so that we may figure out the problem. If this is necessary, please inform me (email: cristi2go@yahoo.com).

With regards,
cristi2go.

Re: VB.Net 3D in wpf

Thomas Stockwell1-Jul-08 6:48

Thomas Stockwell

1-Jul-08 6:48

Well, since it sounds like you ditched the XAML aspect altogether and converted it to procedural code, then I am not quite sure what to tell you. Even I am having problems converting XAML to procedural code. I am somewhat interested in the code that you are working, but I am completely busy all summer and would have no time to look it over, sorry. The best advice that I can give you is to continue to study MSDN documentation/CodeProject/google results/ and possibly buy a good programming book on XAML. Many of the Apress WPF/XAML books I would not be able to code without.

Cross Post

Thomas Stockwell2-Jul-08 2:54

Thomas Stockwell

2-Jul-08 2:54

Progress Window for long mainThread operation, Windows Forms

maksim31030-Jun-08 5:53

maksim310

30-Jun-08 5:53

Hi,

My application requires a long process of going through selected rows in the DataGridView and calculating things, this must be done on the main GUI thread. The user needs to be able to cancel this process but otherwise not have any interaction with the main GUI. I need a popup Progress Window (progressBar, label,cancelButton...) that will tell the user how much of the process is done and give them a chance to cancel.

I think I need to create a new thread that will launch a progress window, the progress window will launch a process located on the main thread, and the main thread will comunicate back to the progress window how things are going. I've lookedd for many tutorials but they've all focused on running work on background threads using public variables.

Also, I am still very new to programming and this is m first real application. I ask you explain things in as much detail as possible.

Thank you!

Re: Progress Window for long mainThread operation, Windows Forms

Guffa30-Jun-08 12:42

Guffa

30-Jun-08 12:42

maksim310 wrote:
this must be done on the main GUI thread

Why do you think so?

maksim310 wrote:
I think I need to create a new thread that will launch a progress window

No, that's not possible. Only the GUI thread can open windows.

Despite everything, the person most likely to be fooling you next is yourself.

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.