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Starting a new VB.Net project and crashed at first hurdle.
I am getting this error message >>>>
An unhandled exception of type 'System.NullReferenceException' occurred in Test.exe
What am I doing wrong?
And also how can stop the system putting in FormWindowState.Maximized. I just want = Maximised
How could I do this in a module rather than at form load?
***********
Private Sub frmMainMenu_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'Setup the frmMainMenu properties
frmMainMenu.ActiveForm.WindowState = FormWindowState.Maximized
frmMainMenu.ActiveForm.IsMdiContainer = True
frmMainMenu.ActiveForm.Text = "Main Menu"
End Sub
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Why are you using ActiveForm??? It's only for referring to MDI Child forms. You should be doing this:
Private Sub frmMainMenu_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'Setup the frmMainMenu properties
frmMainMenu.WindowState = FormWindowState.Maximized
frmMainMenu.IsMdiContainer = True
frmMainMenu.Text = "Main Menu"
End Sub
Also, since FormWindowState is an Enum, you can't stop it from putting that text in there. Besides, since it more complete describes when the value is that your assigning, thereby increading code readability, why would you want it to drop this?
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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What I am trying to do is the following....
1..Create a MDI form that has a menu from which I select a form e.g. add new record
2..In the MDI form, build that form's properties
The only way I thought I could do it was by the example I gave.
In the example you gave me, the only way I can get these objects is by doing the ActiveForm. I think I have missed something
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Which form is this code you posted in? It looks like it's in the MDI Parent form. If this is teh case, since it is in the Load event of the MDI Parent, there can't possibly be any child forms yet, so ActiveForm will return Null. This is where your getting the Null Reference exception from. You're trying to call methods and set properties on something that doesn't exist yet.
Also, you said you were creating a child form and trying to set the properties on it? You never created a new form in the code you posted...
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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I need to know how to autofill a combo box from a dataset in a VB.NET 2003 web application, any hints? 
Thanks in advance.
Treacherous_1
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Got it working! :->
Treacherous_1
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I have used following article
http://www.codeguru.com/vb/gen/vb_graphics/fileformats/article.php/c6743/
but when i zip any folder from desktop then it inclued whole path (C:\Documents and Settings\navees\Desktop\test1) in zip file.
How i can restrict it.
plz email any suggestion on following e-mail
navees_a@yahoo.com
Thanks
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You might want to ask the people who actually wrote the library your using. Considering there are thousands upon thousands of controls and libraries out there, it's very unlikely your going to find anyone who knows anything about the library you're using.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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Thanks for reply.
If any one have idea about any other free library then please give me reference.
thanks
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im working on a program that places text into a listbox from a .txt file, but what I want to do is when a line in the listbox is clicked it will place the selected text from the listbox and place it into another text feild in a outside program like a word doc, website text field, or just a text field in another program. is there a way to do this?
thanks
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May be you can do this with DDE, Dinamic Data Exchange, it works fine with Excel and work
DDE(Word!) = ListBox1.Text (I don't remmember very well, but is something like this)
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I guess I dont understand this example if you could explain more that would be great, o and im using vb.net
thanks again
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To grab the text from the listbox use
text=listbox.selecteditem.text
then depending on what program you want to write to very simply:
OpenFile(1,filename,outputmode)
Writeline(1,text)
FileClose(1)
something like this anyway.
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I have a MainMenu with four levels of MenuItems. The value given in the "Name" property of each MenuItem is stored in a database table's column. The table also contains a second column used to Enable or Disable (1 for Enable and 0 for Disable) the MenuItem. While loading the form, I read all the names from the table's first column whose second column's value is 1. Then I have to enable all these MenuItems before the form is being displayed. Initially all the MenuItems are disabled. While the "Name" property is available at design time, I could not find it while coding. Please help me overcome this. Urgent.
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Hi sir,
I'm new at vb.net so please don't discard this questio as this might be a silly question for you guys. i'm developing a system which has interaction with database. my front end is created in vb.net which consists of some text boxes and drop down lists. and i have my database in MS access already created. now i want to link the textboxes to my database. i'm unable to do so. could you help me. please. and it would be better if you can guide me in an step wise manner. please help.
regards,
manik
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You might want to download the notes from the following websites, these are the notes my instructor teaches VB.NET with, they are really great notes. You will find what you're looking for in the unbound database notes.
http://www.mstc.edu/instructor/VGaul/Courses/Beginning%20Visual%20Basic/Begin%20VB.htm
http://www.mstc.edu/instructor/VGaul/Courses/Int%20Visual%20Basic/IntVB.htm
Treacherous_1
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thanx buddy for ur help. its great. but still i'm having some problems. it would be kind of you if you can send a small sample program with code realated to my requirements as mentioned above.
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Hi There!!
When I run the program that I have created for a Pocket PC device it does not show my application on the Project PC Emulator, is it possible to view your created program on there without having to upload it to a real Pocket PC!!, If so please can you give me advice on how to do this.
Thanks
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Hi
How can prevent the Message box or warning box in Visual Basic. if possible,
pls send me the solution.
waiting for ur reply
Tkx
![Rose | [Rose]](https://codeproject.global.ssl.fastly.net/script/Forums/Images/rose.gif) Krishna
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You can't! If your code didn't launch the MessageBox, you can't stop it from popping up.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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Hi
i have run a PDF file through multimedia. i have executing with a vb (exe) file. it will shows some warning message. if i give 'Yes' or 'No' nothing happend. while runnign vb file i don't want warning message or any message box.
pls help me or send me mail to krishnat_in@hotmail.com
w8ing for ur help
Krishna
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For the life of me, I can't figure out what your doing... What are you talking about, "run a PDF file through multimedia"? What does this mean? What warning message? What exactly are you trying to do? Care to post a snippet of your launching code so we can see what your doing?
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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hi...
I have used microsoft word 2003 to create a document. After that, I my vb.net coding... i use microsoft office 11.0 Object library to call this document and modify the text in the document... it work fine in my project... The problem is when i transfer this file and my project to another system tat have only microsoft word XP... the error will occur .... anyone know how to solve this problem??? thank you very much ...
the command line that cause error was:
wordDoc = WordApp.Documents.Open(FileName:=Directory.GetCurrentDirectory & "\New Report Template\" & TemplateFileName, ConfirmConversions:=False, Revert:=True, Format:=Word.WdOpenFormat.wdOpenFormatRTF)
the error message was:
An unhandled exception of type 'System.Runtime.InteropServices.COMException' occurred in cosecmain.dll
Additional information: The server threw an exception.
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Your code is obviously trying to import a COM object that does not exist on the machine, because it has an earlier version of Word to the one you imported on your dev machine. If an earlier version supports the functionality you want, then hopefully you can import it instead on your dev machine, and the new version will support the same object as well as the updated one.
Christian Graus - Microsoft MVP - C++
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thanks for your help... what u mean is i have to use the olddest version of microsoft word (word 97) to create my template file and the project so the user tat using office 2000, xp or 2003 can run the project??
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