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I seem to be running into recurring problems with doing book exercises where my code looks exactly the same as the author's, but theirs works and mine has some sort of syntax error.
my latest is:
"Too many arguments to Public Sub New()"
The bolded line has the blue squiggly under (Me)
<br />
Private Sub Button1_Click(ByVal sender As System.Object, _<br />
ByVal e As System.EventArgs) Handles Button1.Click<br />
<br />
Dim f2 As New Form2(Me)<br />
f2.Show()<br />
Me.Hide()<br />
<br />
End Sub<br />
<br />
Private Sub Button2_Click(ByVal sender As System.Object, _<br />
ByVal e As System.EventArgs) Handles Button2.Click<br />
<br />
Dim f2 As New Form2<br />
f2.Show()<br />
<br />
<br />
End Sub<br />
End Class<br />
Still coaxing software out of the can after all these years...
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You need to change the constructor of the form 'form2' such that it accepts a parameter of type 'form1' if you are in the current form.
Constructor of the form 'form2' goes like this
Sub New ( f as Form1 )
...Code goes here
End Sub
Bhaskara
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tanstaafl28 wrote:
Dim f2 As New Form2(Me)
f2.Show()
Me.Hide()
End Sub
You don't need the Me in the constructor for Form2, unless you intend on passing Form1 as a reference to Form2 for some reason. Usually this would be because Form2 has code on it that modifies the instance, or controls, on Form1.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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While I am beginning to become more intuitive with the code, the "me" is printed in the book just as I typed it.
Still coaxing software out of the can after all these years...
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Where did this book come from? It sounds like it has a mountain of errors in it...
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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It's actually several books. That's what worries me.
One is Visual Basic.Net Step-by-Step by Mike Halvorson, one is Visual Basic.Net Programming by Peter Aiken, and the other one is the MCAD/MCSD Windows Aps with VB.Net and C# 2nd Edition.
None of them have caused any sort of major exceptions, but I've had to do some sort of "tweaking" to my code to avoid syntax errors that they don't seem to have.
So in one way, I'm learning how to improvise, but in another, I'm not getting the same results as these (so called) experts in the field.
Still coaxing software out of the can after all these years...
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Out of curiosity, is it possible to identify which classes are almost always referenced in a VB.NET assembly, and just add them to every project?
If so, what might those classes be?
Still coaxing software out of the can after all these years...
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Classes or Namespaces?
It's entirely up to you. You could go an add ALL the namespaces to each project, but some of them will require you to add the references for them too.
You would have to make your own project templates to add these to every project you make though. You can't tell VS.NET to just add these namespaces to every project, they must be put into the project templates.
When the project is built, all the unnecessary references and namespaces are ignored and not put into the final .EXE or .DLL.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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Perhaps I still don't understand the differences between classes and namespaces. I thought the namespaces pointed to the classes (and structures).
Still coaxing software out of the can after all these years...
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Namespaces, I would say to categorize a set of classes. Say, you have classes SqlClient, OracleClient. These two belong to Data manipulation. So, they can be a part of the namespace Data. code may go like this
Namespace System.Data
Public Class SqlClient
Sub SqlConnection ()
End Sub
End Class
Public Class OracleClient
Sub OracleConnection()
End Sub
End Class
End Namespace
Here in this case, if you import System.Data you will have access to both SqlClient and OracleClient classes directly.
Else if you just import System Namespace, you will have to refer to these classes as follows
Dim s as Data.SqlClient
Dim o as Data.OracleClient
I would say namespaces or just for the sake of simplicity in code. So, one namespace is a group of multiple classes.
Bhaskara
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Thanks for that explaination. It makes more sense now.
Still coaxing software out of the can after all these years...
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A namespace is a collection of related classes.
You don't instantiate a namepsace, but you do to use a class.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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This harkens back to my Excel.Interop issue.
The book example (and the CD file examples) have just the shortened namespace includes at the top, but I had to use the fully qualified namespace in order to get the syntax errors to go away. I can find nothing in the example code that differs from mine, but they don't seem to have to use the full names.
Still coaxing software out of the can after all these years...
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Where did this book come from? It sounds like it has a mountain of errors in it...
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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Visual Basic .NET Step-By-Step and then Visual Basic .NET Programming by Peter Aiken.
Taking the (me) out and leaving just () worked, but I had to manually stop the program when I was done, not just by using the x, but by using the stop option in the Debug menu. There are two forms, one has two command buttons, the first command button opens the second form and closes the first, the second command button opens the second form but doesn't close the first. The second form only has a command button for closing itself.
It was kind of strange, I was looking at the MCSD/MCAD Windows Applications book too, and there was a garbage collection demo that stored so many bits into memory and supposidly if I sat there long enough and waited, it would start to destroy them. I waited...and waited...and waited. Nothing.
I just cleaned off my primary drive and reinstalled Win2K about a month ago (I have XP Pro on my laptop).
Still coaxing software out of the can after all these years...
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I have a vb.net windows application which sends out faxes. It works OK but it seems like the Fax service on Win 2000 hangs after a while. It works fine, as soon as the machine is re-booted. I'm not sure whats causing this. Is there some setting to set the fax service right? Or is my code causing probs?
This is my code:
FaxSvr.Connect(Environment.MachineName.Trim)
FaxSvr.Retries = 10
FaxSvr.RetryDelay = 1
Doc = FaxSvr.CreateDocument(DocPath)
Doc.FaxNumber = Global.FaxNumPrefix & Recipient.RcptFax
Doc.SenderFax = Sender.SenderFax
Doc.SenderName = Sender.SenderName
hresult = Doc.Send()
Return True
Thanks.
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Hello,
I make a program in Vb. net with uses crystal reports, and when i install the program in a pc with windows xp or 98 and i try to view the crystal report and exception raises,
Cannot find KeycodeV2.dll, or invalid Keycode.
Anywone know how to fix this?
Thanks, hebert.
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Try to read the following article from http://support.businessobjects.com/library/kbase/articles/c2011205.asp or use your error message to search in www.google.com
Roath Kanel
APO-CEDC
Save Children Norway-Cambodia Office
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hello
can you please tell me how to open and extract the data from a notepad and then save the data into it
without the system prompt me a message to overwrite the existing notepad
or if is possible please give me a link so that i can study it more deeply
thank you in advance and may you have a good day
Gary
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This doesn't make any sense. Are you talking about controlling the Notepad application from an application that you are writing?
There is no such thing as "overwriting the existing Notepad". Notepad is an application, you can't overwrite it. Are you talking about copying and pasting text?
You going to have to be a bit more clear on what your trying to accomplish.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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sorry about that
i'll try to make it clear this time
im trying to read some value that is available inside a .txt file
then the application will do some calculation
later the result of the calculation will be appended to a new .txt file
example i read value from info.txt then save the output in out.txt
i hope this is clearer than the one i write before
sorry again that i make it so confusing
please if there is a link that i can refer, please tell me
thank you
Gary
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You're talking about simply reading and writing values to/from text files. See this[^] on MSDN for a quick example.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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wow.. it works already and this link provide me more information than i require
thanks Dave
this helps me a lot
thank you again for your help
Gary
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I was wondering if anybody knew how to put controls such as (listview, and a monthcalendar) on a mdi parent window and have it stay behind the child forms that open. Because for space saving i was wanting to put these controls on the Main window(MDI Parent) for easy access when child windows weren't in front. But when I open a child window the controls on mdiparent overlap the child form. Is there a quick way to prevent this from happening. I'm sure there is>
Thanks in advance
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There is no way to get the controls to be on top of the child windows, but you can change the size of the MDIClient area in the MDIParent form. This will allow you to put your controls on the Parent Form above the MDIClient area. It's buried and the documentation on changing this is non-existent because it involves classes and functions that are only meant to be used internally to the .NET Framework.
I'll write something up when I get home tonight.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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