Read up on it, couldn't find anything that worked for me.
Basically, I have a file called SourceCode.vb in my resources.
I'm trying to use:
Dim objCodeCompiler As System.CodeDom.Compiler.ICodeCompiler = New VBCodeProvider().CreateCompiler
Dim objCompilerParameters As New System.CodeDom.Compiler.CompilerParameters()
objCompilerParameters.ReferencedAssemblies.Add("System.dll")
objCompilerParameters.ReferencedAssemblies.Add("System.Windows.Forms.dll")
objCompilerParameters.ReferencedAssemblies.Add("Microsoft.VisualBasic.dll")
objCompilerParameters.ReferencedAssemblies.Add("System.Drawing.dll")
objCompilerParameters.ReferencedAssemblies.Add("System.Data.dll")
objCompilerParameters.ReferencedAssemblies.Add("System.Deployment.dll")
objCompilerParameters.ReferencedAssemblies.Add("System.Xml.dll")
objCompilerParameters.GenerateExecutable = True
objCompilerParameters.GenerateInMemory = False
objCompilerParameters.CompilerOptions = "/target:winexe"
objCompilerParameters.OutputAssembly = "C:\"
Dim strCode As String = My.Resources.SourceCode.ToString
Dim objCompileResults As System.CodeDom.Compiler.CompilerResults = objCodeCompiler.CompileAssemblyFromSource(objCompilerParameters, strCode)
If objCompileResults.Errors.HasErrors Then
MsgBox("Error: Line>" & objCompileResults.Errors(0).Line.ToString & ", " & objCompileResults.Errors(0).ErrorText)
Exit Sub
End If
I need it to compile the code and make the file and place it in C:\ - For some reason its not working. Error is:
error: line>0, no input sources specified
Any ideas? Thanks in advance.
Edit: Problem was that I needed to add an actual name for the file after the output. Thanks for the help Hans.
It's actually because you are setting OutputAssembly to a location when it expects an assembly name. It should be:
objCompilerParameters.OutputAssembly = "AssemblyName.exe"
If you want to set the location of the output assembly, add it to your compiler options.
objCompilerParameters.CompilerOptions = "/target:winexe /out:C:\\AssemblyName.exe"
Although, I believe if you want to write to the C: drive, you will need to run your program as administrator.
Related
how do I add a path to a code where "HERE_HAS_TO_BE_A_PATH" is. When I do, Im getting an error message. The goal is to be able to specific the path where is the final text file saved.
Thanks!
Here is a code:
Dim newFile As IO.StreamWriter = IO.File.CreateText("HERE_HAS_TO_BE_A_PATH")
Dim fix As String
fix = My.Computer.FileSystem.ReadAllText("C:\test.txt")
fix = Replace(fix, ",", ".")
My.Computer.FileSystem.WriteAllText("C:\test.txt", fix, False)
Dim query = From data In IO.File.ReadAllLines("C:\test.txt")
Let name As String = data.Split(" ")(0)
Let x As Decimal = data.Split(" ")(1)
Let y As Decimal = data.Split(" ")(2)
Let z As Decimal = data.Split(" ")(3)
Select name & " " & x & "," & y & "," & z
For i As Integer = 0 To query.Count - 1
newFile.WriteLine(query(i))
Next
newFile.Close()
1) Use a literal string:
The easiest way is replacing "HERE_HAS_TO_BE_A_PATH" with the literal path to desired output target, so overwriting it with "C:\output.txt":
Dim newFile As IO.StreamWriter = IO.File.CreateText("C:\output.txt")
2) Check permissions and read/write file references are correct:
There's a few reasons why you might be having difficulties, if you're trying to read and write into the root C:\ directory you might be having permissions issues.
Also, go line by line to make sure that the input and output files are correct every time you are using one or the other.
3) Make sure the implicit path is correct for non-fully qualified paths:
Next, when you test run the program, it's not actually in the same folder as the project folder, in case you're using a relative path, it's in a subfolder "\bin\debug", so for a project named [ProjectName], it compiles into this folder by default:
C:\path\to\[ProjectName]\bin\Debug\Program.exe
In other words, if you are trying to type in a path name as a string to save the file to and you don't specify the full path name starting from the C:\ drive, like "output.txt" instead of "C:\output.txt", it's saving it here:
C:\path\to\[ProjectName]\bin\Debug\output.txt
To find out exactly what paths it's defaulting to, in .Net Framework you can check against these:
Application.ExecutablePath
Application.StartupPath
4) Get user input via SaveFileDialogue
In addition to a literal string ("C:\output.txt") if you want the user to provide input, since it looks like you're using .Net Framework (as opposed to .Net Core, etc.), the easiest way to set a file name to use in your program is using the built-in SaveFileDialogue object in System.Windows.Forms (like you see whenever you try to save a file with most programs), you can do so really quickly like so:
Dim SFD As New SaveFileDialog
SFD.Filter = "Text Files|*.txt"
SFD.ShowDialog()
' For reuse, storing file path to string
Dim myFilePath As String = SFD.FileName
Dim newFile As IO.StreamWriter = IO.File.CreateText(myFilePath) ' path var
' Do the rest of your code here
newFile.Close()
5) Get user input via console
In case you ever want to get a path in .Net Core, i.e. with a console, the Main process by default accepts a String array called args(), here's a different version that lets the user add a path as the first parameter when running the program, or if one is not provided it asks the user for input:
Console.WriteLine("Hello World!")
Dim myFilePath = ""
If args.Length > 0 Then
myFilePath = args(0)
End If
If myFilePath = "" Then
Console.WriteLine("No file name provided, please input file name:")
While (myFilePath = "")
Console.Write("File and Path: ")
myFilePath = Console.ReadLine()
End While
End If
Dim newFile As IO.StreamWriter = IO.File.CreateText(myFilePath) ' path var
' Do the rest of your code here
newFile.Close()
6) Best practices: Close & Dispose vs. Using Blocks
In order to keep the code as similar to yours as possible, I tried to change only the pieces that needed changing. Vikyath Rao and Mary respectively pointed out a simplified way to declare it as well as a common best practice.
For more information, check out these helpful explanations:
Can any one explain why StreamWriter is an Unmanaged Resource. and
Should I call Close() or Dispose() for stream objects?
In summary, although streams are managed and should garbage collect automatically, due to working with the file system unmanaged resources get involved, which is the primary reason why it's a good idea to manually dispose of the object. Your ".close()" does this. Overrides for both the StreamReader and StreamWriter classes call the ".dispose()" method, however it is still common practice to use a Using .. End Using block to avoid "running with scissors" as Enigmativity puts it in his post, in other words it makes sure that you don't go off somewhere else in the program and forget to dispose of the open filestream.
Within your program, you could simply replace the "Dim newFile As IO.StreamWriter = IO.File.CreateText("C:\output.txt")" and "newFile.close()" lines with the opening and closing statements for the Using block while using the simplified syntax, like so:
'Dim newFile As IO.StreamWriter = IO.File.CreateText(myFilePath) ' old
Using newFile As New IO.StreamWriter(myFilePath) ' new
Dim fix As String = "Text from somewhere!"
newFile.WriteLine(fix)
' other similar operations here
End Using ' new -- ensures disposal
'newFile.Close() ' old
You can write that in this way. The stream writer automatically creates the file.
Dim newFile As New StreamWriter(HERE_HAS_TO_BE_A_PATH)
PS: I cannot mention all these in the comment section as I have reputations less than 50, so I wrote my answer. Please feel free to tell me if its wrong
regards,
vikyath
Hi people!
So right now I'm making a Minecraft Launcher, but I have a problem. I need to list every libraries in the .minecraft libraries folder, but the launcher can't access it even if it's executed as administrator.
Here is the code that fails :
Try
FileList = File.ReadAllLines(AppDataDir & "\libraries").ToList()
Catch ex As Exception
MsgBox(ex.Message)
End Try
The FileList variable :
Dim FileList As New List(Of String)
I need to make it a list of string because of this code :
Dim GameLibs As String = Nothing
For i = 0 To FileList.Count - 1
GameLibs += FileList.Item(i) + ";" + Environment.NewLine()
Next
So now I'm stuck with this problem, but I can't understand it since it works nicely with any other folder.
Oh and, the AppDataDir variable is just the .minecraft directory.
Any help would be great! Thanks if you tried to help me anyway.
I think you just missed the file name and its extension, try to add that line like this one:
FileList = File.ReadAllLines(AppDataDir & "\libraries.txt").ToList()
I hope that helps.
^_^
I have been trying to do this seemingly simple task for a while now, but no luck. Here is some pieces of code I'm using...
Dim SDPath As String = TextBox1.Text
Dim ContentPath As String = TextBox2.Text
Dim RPXName As String = TextBox4.Text
Dim Copy_To_Dir As String = SDPath & RPXName
Dim Copy_To_Dir As String = SDPath & RPXName
'copy any subdirs from ContentDir to SD:\RPXName
For Each ContentDirSub In System.IO.Directory.GetDirectories(ContentPath, "*", IO.SearchOption.AllDirectories)
My.Computer.FileSystem.CopyDirectory(ContentDirSub, Copy_To_Dir, True)
Next
This should create the sub directories in the specific path. Where am I going wrong here??? I've been scouring examples but found nothing. I also want this to copy the contents of the sub directory as well.
Not sure why it isn't working but you could try to make sure that the path you are copying to is a correct directory path. The below code combines the path into a correct path name.
Dim Copy_To_Dir As String = System.IO.Path.Combine(SDPath & RPXName)
You also don't need to write that twice.
Is there any errors appearing?
I am trying to create and run a batch file from VB.net, then get the output and print it out. But when it runs it is appended by these symbols '´╗┐. Causing this error '´╗┐cd' is not recognized as an internal or external command, operable program or batch file. When I look at the batch file in notepad++ there is no symbol there! What is happening! Thanks James.
Code:
Dim path As String = Directory.GetCurrentDirectory()
Dim command As String = "cd " & path & " & " & argument
MsgBox(command)
Dim file As System.IO.StreamWriter
file = My.Computer.FileSystem.OpenTextFileWriter(tempFile, False)
file.WriteLine("#ECHO OFF")
file.WriteLine(command)
file.Close()
Dim objProcess As New Process()
Dim SROutput As System.IO.StreamReader
With objProcess.StartInfo
.FileName = tempFile
.RedirectStandardOutput = True
.UseShellExecute = False
.Arguments = ""
End With
objProcess.Start()
SROutput = objProcess.StandardOutput
Do While SROutput.Peek <> -1
'MessageBox.Show(SROutput.ReadLine)
rtbOutput.Text = rtbOutput.Text & SROutput.ReadLine & vbNewLine
Loop
objProcess.Dispose()
'Process.Start(tempFile)
rtbOutput.Text = rtbOutput.Text & message & vbNewLine
That's a Byte Order Mark.
It means the OpenTextFileWriter() method is using a different encoding than you expect. You can fix the problem by using OpenTextFileWriter() overload that allows you pick an encoding like ASCII with no byte order mark or use the encoding with the byte order mark that matches what the DOS subsystem is expecting.
Solved, Im not entirely sure what was happening when it was writing the file, but I have changed it to this
Using writer As StreamWriter = New StreamWriter(tempFile)
writer.Write(command)
End Using
and its now running fine!. Thanks for any time spent on this and feel free to post an explination as to why this was happening.
I How can I search a specific file using vb.net and store the path in a variable?
For example if I need to know where I have *.abc files in my entire computer, how can this be done?
Thanks
Furqan
Dim di As New DirectoryInfo("c:\")
Dim files() As FileInfo = di.GetFiles("*.abc", SearchOption.AllDirectories)
There's the EnumerateFiles method that has been introduced in .NET 4.0. If not you could use the GetFiles method but be warned that this method returns an array of strings which represent the matched filenames and it could block for a long time.
Well this is awkward, but this seems to work for me before, maybe you can try it
If System.IO.File.Exists(txtName.Text) Then
MsgBox("Match not found")
Else
MsgBox("Match found")
End If
Update
This one works
Directory.SetCurrentDirectory(My.Computer.FileSystem.SpecialDirectories.MyDocuments & "\WinVault")
If Not System.IO.File.Exists(txtName.Text & ".wv") Then
btnSave.Enabled = True
Else
btnSave.Enabled = False
'Balloon tip
bTipControl = txtName
bTipCaption = "Vault Name"
bTipText = VAULT_NAME_EXIST
bTip_Show()
End If
And of course, make sure you do import System.IO or add reference if not available.