Visual Basic

Re: Saving a compiled assembly

1-Apr-07 5:12

I've been trying to get an application that can compile code at runtime, then save it as a .exe file.
So basically what I did was go on MSDN, 'steal' some code (yeah, I know I shouldn't...) that compiled VB and try to change it so it could also save it.

Public Class Form1<br />
<br />
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load<br />
        CodeEmitter.RunCode("Microsoft.VisualBasic.MsgBox(" & """" & "Hello World" & """" & ")")<br />
<br />
    End Sub<br />
End Class<br />
Class CodeEmitter<br />
<br />
    Shared Sub RunCode(ByVal code As String)<br />
<br />
        Dim cmplrParms As New CodeDom.Compiler.CompilerParameters<br />
<br />
        cmplrParms.GenerateExecutable = True<br />
<br />
        cmplrParms.OutputAssembly = "C:/VBCompile.exe"<br />
<br />
        cmplrParms.TreatWarningsAsErrors = False<br />
<br />
        cmplrParms.WarningLevel = 4<br />
<br />
        cmplrParms.ReferencedAssemblies.AddRange(New String() {"System.dll", "Microsoft.VisualBasic.dll"})<br />
<br />
        code = String.Format("Public NotInheritable Class EmittedClass{0}Public Shared Sub DoWork{0}{1}{0}End Sub{0}End Class", Environment.NewLine, code)<br />
        Dim pvdr As New VBCodeProvider<br />
<br />
        Dim rslts As CodeDom.Compiler.CompilerResults = pvdr.CompileAssemblyFromSource(cmplrParms, code)<br />
<br />
        MsgBox("Path: " & rslts.PathToAssembly)<br />
<br />
        Dim assmbly As Reflection.Assembly = rslts.CompiledAssembly<br />
<br />
        Dim t As Type = assmbly.GetType("EmittedClass")<br />
<br />
        t.InvokeMember("DoWork", Reflection.BindingFlags.InvokeMethod Or Reflection.BindingFlags.Public Or Reflection.BindingFlags.Static, _<br />
        Nothing, Nothing, Nothing)<br />
<br />
    End Sub<br />
<br />
End Class

The original code worked until I changed
cmplrParms.GenerateInMemory = True
to

cmplrParms.GenerateExecutable = True<br />
<br />
cmplrParms.OutputAssembly = "C:/VBCompile.exe"

Now I get an error FileNotFoundException at

Dim assmbly As Reflection.Assembly = rslts.CompiledAssembly

because it turns out that nothing was ever compiled to C:\ in the first place! Confused | :confused:

Thanks in advance for any help!

Ri Qen-Sin1-Apr-07 17:39

Ri Qen-Sin

1-Apr-07 17:39

I thought Windows used baclward slashes to separate directories.

ROFLOLMFAO

Re: Saving a compiled assembly [modified] *Solved*

Nick Rioux2-Apr-07 1:05

Button text problem in vb.net 2003 Window Application.

2-Apr-07 1:05

Tried that

Doesn't work Frown | :(

EDIT: I found a fix for it. Thanks for trying to help!
-- modified at 7:19 Monday 2nd April, 2007

amaneet1-Apr-07 4:14

amaneet

1-Apr-07 4:14

Sir/madam.
I am facing a problem i button text.
The problem is i am passing a button control as an argument
like following is my form
i have a function there and in the function signatures i am passing a button control as a argument.
The problem is i am not getting the text of the button in the myclass class.
the object b shows t.text is blank("")
class form1
private sub fun()
dim obj as new myclass
obj.funct(Button1)
'Button1 is name of the button in the form.
end sub
end class

class myclass
public sub funct(byval b as button)
messagebox.show(b.text)
end sub
end class

Please help.
I am using vb.net 2003 Window Application.
Thanks and regards
Pankaj

Re: Button text problem in vb.net 2003 Window Application.

Nick Rioux1-Apr-07 5:26

1-Apr-07 5:26

Myclass is a reserved word.

    Private Sub fun()
        Dim obj As New class1
        obj.funct(Button1)
        'Button1 is name of the button in the form.
    End Sub

    Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        fun()
    End Sub
End Class

Class class1
    Public Sub funct(ByVal b As Button)
        MessageBox.Show(b.Text)
    End Sub
End Class

help me

phowarso1-Apr-07 2:39

phowarso

1-Apr-07 2:39

could anyone help me please?
I wanna make 3D graphic with VB.NET.
I wanna rotate 360 degree that 3D graphic images.
Confused | :confused:

phowarso

Re: help me

Nick Rioux1-Apr-07 5:30

How can I write on image and save it again?

1-Apr-07 5:30

I don't know if VB's the best way to do that.
Try XNA

Re: help me

Dave Kreskowiak1-Apr-07 7:09

Dave Kreskowiak

1-Apr-07 7:09

Christian already gave you the correct answer to your question here[^]. Asking the same question again will not change the answer.

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007

Re: help me

lmoelleb1-Apr-07 23:29

lmoelleb

1-Apr-07 23:29

WPF (.NET 3.0) includes support for 3D.

Omar Mallat31-Mar-07 23:45

31-Mar-07 23:45

Hi everybody.

I have a website where users can upload their pictures. I need to automatically add the name of my website to any uploaded picture. is that possible? and How?

Thanks in advance...

OmarMallat

Guffa1-Apr-07 4:50

1-Apr-07 4:50

Create a MemoryStream from the uploaded data, so that you can load the image into a BitMap object. Create a Graphics object for the bitmap so that you can draw on it. Save the BitMap to a file.

---
single minded; short sighted; long gone;

Omar Mallat1-Apr-07 18:28

1-Apr-07 18:28

ok, but can you give me how to write to an image? and how to save it again? this is my question

OmarMallat

Guffa1-Apr-07 21:03

1-Apr-07 21:03

Use the Graphics.FromImage method to create a Graphics object for the image. The Graphics object has method that you can use to draw anything you want on the image, like text, shapes and other images. Use the Save method on the image to save it when you are done drawing on it.

---
single minded; short sighted; long gone;

Omar Mallat2-Apr-07 18:27

2-Apr-07 18:27

ok, but I'm new in web development. in windows application it's easy to do that, but in web development how to put an exe file on the server to perform this task?? and how to call this exe? and how the exe can save directly to the server? or there is another concept?
the view about this is not very clear...

OmarMallat

Guffa2-Apr-07 21:05

2-Apr-07 21:05

You don't have to do this in a separate program at all. The entire framework is available from within ASP.NET.

---
single minded; short sighted; long gone;

Omar Mallat2-Apr-07 23:17

2-Apr-07 23:17

sorry but I can't understand how..
let we have a simple example.
I need to make a copy of each uploaded file..
in windows application: filecopy source, destination
build, and double click to copy the file

in web what should I do?

please, do not say that I'm stupid... but I don't know... Laugh | :laugh:

OmarMallat

Guffa3-Apr-07 0:39

3-Apr-07 0:39

It works exactly the same in a web application. Put the code in the page, deploy the application, browse to the page.

There is one difference, though. The working directory is not the folder of the web application, so you have to use complete file paths. The Server.MapPath method gives you the physical path of a virtual address.

---
single minded; short sighted; long gone;