C# - Why Does The 0x00 Character Make System.Diagnostics.Debug.WriteLine Not Write A New Line
Jul 29, 2011
Dim hex = "41"
Dim text As New System.Text.StringBuilder
For i As Integer = 0 To hex.Length - 2 Step 2
text.Append(Chr(Convert.ToByte(hex.Substring(i, 2), 16)))
[code].....
but yet this fails.. (the output isn't itself in a new line) what's the explanation for that?From what I know, doesn't System.Diagnostics.Debug.Writeline does something which looks like this:
System.Diagnostics.Debug.Write(input)
System.Diagnostics.Debug.Write("
")
so regardless of my input it should always have a newline char even if there is a terminating 00 char in my input?
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May 15, 2009
This may be more of an OOP concept question, but here's what I'd like to do.I have an application that outputs debug information using System.Diagnostics.Trace.WriteLine so it can be viewed with DebugView.I'd like to override/extend (not sure of the proper terminology) this method to log the text to a file instead, or maybe in addition to the Trace output. This would allow me to write a new WriteLine method for my app, and I could leave all my other System.Diagnostics.Trace.WriteLine statements unchanged throughout the rest of the application.?
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Jul 29, 2011
Full Program: Option Strict On : Option Explicit On Module Module1
[Code]...
After I ran it, I had a file a.txt in my debug folder but the size is 0 bytes (and when i open it is empty of course) Shouldn't the output had "asd" in it ?
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May 24, 2011
I've already used arrays and a random number to generate a sentence with the pattern KLAC, but I need to write this to a text document and then do it again. I have succeeded to write the first sentence, but the second will not register.This represents essentially everything I've tried. (I haven't included the arrays because they're pretty long.)
repeat:
Dim rndNo As New Random()
Dim chosen_aword = aword(rndNo.Next(0, aword.Length))
[code]......
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Jan 31, 2011
I'm working on a console application that needs to write a line until a certain value is met and than do the same backwards until another value is met.
The line need to be 51 spaces wide, start and end with the pipe ("|") character and have a cross ("X") character in between.
I can only define both the characters once.
The result needs to be something like this:
|X_________X|
|_X_______X_|
|__X_____X__|
|___X___X___|
|____X_X____|
|_____X_____|
And then from the last line on, go back to form a big X on the screen and start over again, going over and over until a key is pressed.
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Jun 10, 2010
What's the difference between Console.WriteLine() vs Debug.WriteLine()?
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Jan 27, 2012
in VS 2008, I started a new VB console project, using default options. I wrote this simple program:
Module Module1
Sub Main() Dim ArrayOfInts() As Integer
ArrayOfInts = New Integer() {1, 2, 3, 4, 5, 6, 7, 8, 9}
[Code].....
However, I cannot find the output from the calls to writeline. Not in the Output window, not in the Immediate window and not in the console output.
Or, do I need to do something extra to get these to appear?
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Mar 16, 2012
I am trying to write some messages to a text file using debug.writeline("Message"). Here is the code.
Dim Tr As TextWriterTraceListener
Tr = New TextWriterTraceListener(System.IO.File.CreateText("Output1.txt"))
'Tr = New TextWriterTraceListener(System.Console.Out)
Debug.Listeners.Add(Tr)
Debug.WriteLine("Test Message")
I see the output1.txt file being created but nothing being written in the file.
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Aug 31, 2011
Simple question that does not seem to be covered: If I use a lot of Debug.WriteLine statements in my code, will they be completely absent in my production version?
I mean: Is the compiler smart enough to not emit any code for those calls? Or would I have to surround them by #if DEBUG..#end if directives?
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Feb 20, 2012
When I add string data to a textbox, such as textBox.AppendText("my text"), it shows the end of string character, 0x00, as a box. This does not happen under Windows 7 but does in Windows XP. It is very annoying to see the box at the end of every string that is displayed. How can I prevent it from showing?
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Sep 2, 2009
In the past, perhaps versions of Visual Studio prior to the 2008 that I am using now, I would do something like this in my VB.NET code:System.Diagnostics.Debug.WriteLine("Message")
and the output would go to the output window.Now it doesn't. Something must first apparently be enabled.
If this involves "attaching a debugger", please explain how to do it. It seems to me that it should just work without too much of a fuss.Here's a video explaining the issue in real time and showing you all my settings[URL]..
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Aug 19, 2009
If I have Debug.WriteLine method in my code, do I need to comment all these methods before producing the Release version? Or does the compiler just ignore them?
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Oct 6, 2011
I have a fellow employee who is learning Visual Basic and in one of her assignments she is using the debug.writeline statement. Example: Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load Debug.WriteLine("This line always prints") End Sub When you run the program, nothing prints to the Output window. I have tried it in VS2008 and VS2010. Brian Allison
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Aug 19, 2009
I have a vb.net application that uses threads to asynchronously process some tasks in a "Scheduled Task" (console application).We are limiting this app to run 10 threads at once, like so:
(pseudo-code)
- create a generic list of 10 threads
- spawn off the threadproc for each one
- do a thread.join statement for each thread to wait for the longest running one to complete.
What i am finding is that if the code called by the threadproc contains any "Debug.Writeline" or "Trace.Traceinformation" statements, the thread hangs. I can see the thread in the Debug - Windows - Threads window, and switch to it, but it highlights the debug.writeline statement and never gets past it. is there something special about the Debug or Trace statements that make them non-thread-safe? Any idea why this would hang things up? If I leave the debug statement in, the thread never completes. If I take the debug statement out, the thread completes in less than 5 seconds.
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Sep 28, 2011
I have a procedure that loops through the directories/subdirectories on a file server and sets the permissions. Procedure is called on a button click of a form.
I need to display on the form which directory is being processed. Similar to if we use the Debug.writeline which writes to the output in Visual Studio. I tried using a ListBox but it only displays the last one and only displays the last one once processing is done. I want to be able to display each directory name as it is being processed.
Psuedo code as follows:
For each dir in L drive
setPermissions(dir)
'display in ListBox dir name
lstProgress.Items.Add(dir.Name)
Next
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Sep 17, 2010
I need to update the students score with a new score but I cant get it to write to the line that the students current score it at. It just deletes the whole text.
Alex,letmein,0
David,qwerty1,0
John,password,0
[Code].....
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Feb 20, 2011
I have declared my variables As Decimal, and what I am struggling to do is to display these values to 2 decimal places in such a way so that they both appear on the same line of output. Here is the guts of the problem (noting I have two different versions of Console.Writeline...the second one does display on one line, but without two decimal places).
[Code]...
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Jul 18, 2009
I am fairly new to VB.NET (but have vast professional experience with several other languages) and am completely new to these forums (so please don't burn me if I posted in the wrong place). I have run into a rather odd quirk with System.Diagnostics.Process.GetProcesses. I have a sample application (source posted below) that checks all running processes every second for changes (created and destroyed) and tells the user what has changed, if anything, in the last second. The sample runs for anywhere between 29-72 seconds before issuing an array out of bounds error. It appears that the Windows system processes, SearchProtocolHost.exe and SearchFilterHost.exe explicitly, disappear from the list causing my application to throw the aforementioned exception. Specifically the exception I am receiving is as follows:
Unhandled Exception: System.ArgumentOutOfRangeException: Specified argument was out of the range of valid values.I have noted in comments where the exception is thrown in the code below. If any of you would be willing to try this sample on your PC's or could suggest potential issues with my sample that could cause this problem
My sample code:
Imports System
Imports System.Diagnostics
[code]....
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Mar 13, 2012
When I use System.Diagnostics.PerformanceCounterCategory.GetInstanceNames call, I always get 0 instances returned the first time. If I actually query for a counter value first (using perfmon) and then call GetInstanceNames, it works fine. Can someone provide some insight? Do I need to get a counter value first (in code) and then use the GetInstanceNames?
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Dec 22, 2010
I am tring to build network toolkit for my very computer illiterate techs. What I am trying to accomplish is to embed a command prompt of sorts in a form. I have been sucessful to a point. Here are my main two problems.
1: I cannot read line by line as the output of the process is generated. Rrather I have to wait untill its complete, this is ok for "IPConfig and Maybe "Ping". But for longer diag tests this would take too long and it would look like the app has crashed. So I need to figure out how to redirect the output of the process to my text control.
2: I would like to have the ability to redirect keyboard input to the process. For telnet as an example. I would capture all keyboard commands while my text control has focus and send them to the process and with the problem solved I should be able to establish 2-way IO with the process. Is there a way to do this or am I barking up the wrong tree.
[Code]...
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Sep 20, 2011
I am trying to kill process using following code
Dim ItemProcess() As Process = Process.GetProcessesByName("vlc")
If Not ItemProcess Is Nothing Then
For Each SubProcess As Process In ItemProcess[code]....
Now I have created two sub in the first sub I started a process using process.start(preview.mp3)in the second sub I killed this process using the above code but instead of passing the mp3 file I am using the vlc.exe which is actually processing the fileFor this I have to manually check the task manager and get the process name.So my point is ,is there any way i can write a code that automatically the corresponding exe file that is using it.
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Jul 6, 2009
I'm having a problem. I have researched this for over a week and have not found what I need. I find a lot of great suggestions but none of them work for me.My code and program works 100% if you put a valid program, process or file name in the box but if you don't, it crashes. Also if the program is not registered or in a known path it will crash.
I've tried My.Computer.FileSystem.FileExists(txtProcessName.Text) and System.IO.File.Exists(txtProcessName.Text)
But every variation I try thinks that none of the files exist.I don't want to hard code any of the paths or file names because I want this to be dynamic. I also want it to be a one file program. I know eventually I will need to get into multiple files but I like basing all my programs on a file that can be copied and pasted to any computer and ran without problems.
NOTE: This is a multi-function program. Not only does it start programs but it also terminates them, looks the process up on the web to see if it's spyware, adware or a valid program and it also is a Task manager.
[Code]...
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Dec 23, 2011
I have an windows application from where i start another EXE by using the system.diagnostics.process.
I do as follows:
private myExe as System.Diagnostics.Process
myExe = New System.Diagnostics.Process()
myExe.StartInfo.WorkingDirectory = "...my path ..."
myExe.StartInfo.FileName = "...my exe..."
myExe.Start()
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Nov 30, 2009
I'm using System.Diagnostics.Process.Start to open a file using a string stored in a SQL datatable. It works absolutely fine as long as there is an application on the local machine associated with the file type. If there isn't an association, what happens is the "Save as" dialog box pops up. What I'd like to happen is to just bring up a message box or some other prompt that tells the user what the problem is, and to contact the helpdesk. Some users will be confused if they see a "Save as" dialog box, I think.
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May 18, 2010
i'm trying to launch mpc(media player classic) in background for playing some music.
Like it's supposed to be background, i don't want the player to be visible.
I've tryed this out (see below) without expected result. What should i do ?
Dim proc As New Process Dim IS_READING As Boolean = False Try
[Code]...
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Aug 5, 2009
I am having problem trying to use Imports System.Diagnostics.ProcessThread to closed multiple WORD.exe session using Vb.Net. My sample code below managed to close just one session instead of all the sessions with WORD.EXE. [Code]
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Aug 26, 2009
What the title says. Are they the same? I've noticed that the first does have arguments and such, but are they going to give the same end result?
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Feb 8, 2011
Trying to integrate the google closure compiler in a batch job of mine and having difficulty getting it to work.Using command prompt I can enter the following command and get my scripts compiled. (The command is a self explanatory example)
java -jar "compiler.jar" --js_output_file="myOutput.min.js" --js="input1.js" --js="input2.js"
I have tried to replicate this using the System.Diagnostics.Process object but thus far have failed.I have tried
Dim command As String = BuildCommand(CompilationScripts, Me._Output)
Dim process As New Process
process.Start("compiler.jar", command)
And I have tried
Dim command As String = BuildCommand(CompilationScripts, Me._Output)
Dim process As New Process
process.StartInfo.Arguments = command
[code]....
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Mar 29, 2012
I have a read only file and I am using System.Diagnostics.Process to open the file.If a user tries to save the file the "Save As" dialog box opens because the file is read only. The "Save As" dialog box brings them to the directory from where the file was opened from.
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Feb 26, 2011
my problem is that when I try to write a exe application for measuring the cpu usage every time I get the error:
A first chance exception of type 'System.InvalidOperationException' occurred in System.dll
A first chance exception of type 'System.FormatException' occurred in mscorlib.dll
The code I use is: [Code] And I get the above error,I searched a little in the internet but the most post were for database optimization and so on.
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