Develop Reference

How to pass a variable with CSharpCodeProvider?

I need to create an EXE file with my application, I can pass strings with manipulating the string format but I cannot pass the other variables that I need to ex:byte array, here is my code if this helps:
using Microsoft.CSharp;
using System;
using System.CodeDom.Compiler;
using System.Windows;
namespace ACompiler.CompWorker
{
class CompilerWorker
{
public static byte[] testarray = SomeClass.SomeArray;
public static string Key = "Testkey12";
public static void Compile()
{
CSharpCodeProvider CompileProvider = new CSharpCodeProvider();
CompilerParameters CompileProviderParameters = new CompilerParameters(new[] { "mscorlib.dll", "System.Core.dll" }, AppDomain.CurrentDomain.BaseDirectory + "Compiled.exe", true);
CompileProviderParameters.GenerateExecutable = true;
string test= #"using System;
namespace Tests
{
class Program
{
static void Main(string[] args)
{
byte[] Content = " + testarray + #";
string Key = """ + Key + #""";
Console.WriteLine(""Key: "" + EKey);
Console.WriteLine(Content);
Console.ReadLine();
}
}
}
";
var Result = CompileProvider.CompileAssemblyFromSource(CompileProviderParameters, test);
}
}
}
Basically I want to move the "testarray" into the compiled app, I hope someone can point me to the right direction!

The trick is to "serialize" the data back in to code the compiler can compile. Try this:
var arrayCode = "new byte[] { " + string.Join(", ", testarray) + " }";
string test = #"using System;
namespace Tests
{
class Program
{
static void Main(string[] args)
{
byte[] Content = " + arrayCode + #";
string Key = """ + Key + #""";
Console.WriteLine(""Key: "" + EKey);
foreach(byte b in Content)
{
Console.WriteLine(b.ToString());
}
Console.ReadLine();
}
}
}
";
Keep in mind, you can't do Console.WriteLine on a byte array object and have it spit out each item. You will have to iterate over the items to print them out. I updated your code to do it the proper way.

C# System.IO.IOException

I have following code:
using System;
using System.Collections.Generic;
using System.IO;
using VirusTotalNET;
using VirusTotalNET.Objects;
using System.Linq;
using System.Security.Permissions;
namespace VirusTotalNETClient
{
class Program
{
private const string ScanUrl = "http://www.google.com/";
static void Main(string[] args)
{
VirusTotal virusTotal = new VirusTotal("5d8684f50946c2bdeaf5c4fd966f61f3661de808e9d7324b99788d6f4fb7ad57");
//Use HTTPS instead of HTTP
virusTotal.UseTLS = true;
//creating folder for programs reliqies and output log
string folderName = "C:\\OnlineScanner";
System.IO.Directory.CreateDirectory(folderName);
//get list of files to analyse
var paths = Traverse("C:\test");
File.WriteAllLines("C:\\OnlineScanner\\test.txt", paths);
foreach (string line in File.ReadLines("C:\\test.txt"))
{
//Define what file you want to analyse
FileInfo fileInfo = new FileInfo(line);
//Check if the file has been scanned before.
FileReport fileReport = virusTotal.GetFileReport(fileInfo);
bool hasFileBeenScannedBefore = fileReport.ResponseCode == ReportResponseCode.Present;
//If the file has been scanned before, the results are embedded inside the report.
if (hasFileBeenScannedBefore)
{
int detekce = fileReport.Positives;
if (detekce >= 1)
{
using (var writer = new StreamWriter("C:\\OnlineScanner\\OnlineScannerLog.txt"))
{
writer.WriteLine(line);
writer.WriteLine("URL to test: " + fileReport.Permalink);
writer.WriteLine("Detect ratio: " + fileReport.Positives + "/54");
writer.WriteLine("Message: " + fileReport.VerboseMsg);
writer.WriteLine();
writer.WriteLine();
}
}
System.Threading.Thread.Sleep(16000);
}
else
{
ScanResult fileResult = virusTotal.ScanFile(fileInfo);
int detekce = fileReport.Positives;
if (detekce >= 1)
{
using (var writer = new StreamWriter("C:\\OnlineScanner\\OnlineScannerLog.txt"))
{
writer.WriteLine(line);
writer.WriteLine("URL to test: " + fileReport.Permalink);
writer.WriteLine("Detect ratio: " + fileReport.Positives + "/54");
writer.WriteLine("Message: " + fileReport.VerboseMsg);
writer.WriteLine();
writer.WriteLine();
}
}
System.Threading.Thread.Sleep(16000);
}
}
}
private static IEnumerable<string> Traverse(string rootDirectory)
{
IEnumerable<string> files = Enumerable.Empty<string>();
IEnumerable<string> directories = Enumerable.Empty<string>();
try
{
// The test for UnauthorizedAccessException.
var permission = new FileIOPermission(FileIOPermissionAccess.PathDiscovery, rootDirectory);
permission.Demand();
files = Directory.GetFiles(rootDirectory);
directories = Directory.GetDirectories(rootDirectory);
}
catch
{
// Ignore folder (access denied).
rootDirectory = null;
}
foreach (var file in files)
{
yield return file;
}
// Recursive call for SelectMany.
var subdirectoryItems = directories.SelectMany(Traverse);
foreach (var result in subdirectoryItems)
{
yield return result;
}
}
}
}
This code run some time (arround 15secs) but then program crashs.
The error is
System.IO.IOException, process can't access to file C:\hiberfil.sys.
http://upnisito.cz/images/2016_12/319crasherrror.png
Do you have any idea how to solve it?

NullReferenceException being thrown

I am a beginner in C#.NET and we were tasked to create an online banking system in which transactions and login data are stored in an array of class. Although I am slowly getting a grasp of the whole array-of-class concept, it seems that I am stuck in saving the login data to an array of class. Here is my program:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using BankTransaction;
namespace LabExam1
{
public partial class Registration : Form
{
Transactions trans = new Transactions();
int number = 10000;
int x = 0;
const int size = 100;
Transactions[] loginData = new Transactions[size];
public void saveLoginData()
{
loginData[x].Username = trans.createUserName(txtFname.Text, txtLname.Text, txtMi.Text);
loginData[x].Password = txtPass.Text;
x++;
}
public Registration()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
cboType.SelectedIndex = 0;
}
private void btnRegister_Click(object sender, EventArgs e)
{
if (txtFname.Text == "" || txtLname.Text == ""|| txtMi.Text == "" || txtPass.Text == "")
{
MessageBox.Show("Please fill up all required fields!", "ERROR", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
else
{
if (cboType.SelectedIndex == 0)
{
number++;
loginData[x] = new Transactions();
saveLoginData();
MessageBox.Show("Generated Username: " + loginData[x].Username + number + "\n" + "Please do not share this Information to anyone!");
this.Hide();
Transaction tr = new Transaction();
tr.ShowDialog();
}
if (cboType.SelectedIndex == 1)
{
if (nudDeposit.Value < 2500.00m)
{
MessageBox.Show("The initial deposit for your account type is insufficient", "ERROR", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
else
{
number++;
loginData[x] = new Transactions();
saveLoginData();
MessageBox.Show("Generated Username: " + loginData[x].Username + number + "\n" + "Please do not share this Information to anyone!");
this.Hide();
Transaction tr = new Transaction();
tr.ShowDialog();
}
}
if (cboType.SelectedIndex == 2)
{
if (nudDeposit.Value < 3000.00m)
{
MessageBox.Show("The initial deposit for your account type is insufficient", "ERROR", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
else
{
number++;
loginData[x] = new Transactions();
saveLoginData();
MessageBox.Show("Generated Username: " + loginData[x].Username + number + "\n" + "Please do not share this Information to anyone!");
this.Hide();
Transaction tr = new Transaction();
tr.ShowDialog();
}
}
}
}
private void btnExit_Click(object sender, EventArgs e)
{
Application.Exit();
}
}
}
I am getting an error on this part which throws the nullReferenceException:
MessageBox.Show("Generated Username: " + loginData[x].Username + number + "\n" + "Please do not share this Information to anyone!");
Here is my class definition:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace BankTransaction
{
public class Transactions
{
String username, password;
#region forArrayOfClassLogin
public String Password
{
get { return password; }
set { password = value; }
}
public String Username
{
get { return username; }
set { username = value; }
}
#endregion
public String createUserName(String fname, String lname, String mi)
{
String firstString = fname[0].ToString();
String secondString = mi[0].ToString();
String thirdString = lname[0].ToString();
String uname = firstString + secondString + thirdString;
return uname;
}
public void setBalance(String type, decimal initialBalance)
{
}
public String getUserName()
{
return username;
}
public String setPassword(String pass)
{
return password = pass;
}
public String getPassword()
{
return password;
}
}
}
Any help would be greatly appreciated. Thanks in advance.

You need to use loginData[x -1] as you have increment the value of x in saveLoginData()
MessageBox.Show("Generated Username: " + loginData[x -1].Username + number + "\n" + "Please do not share this Information to anyone!");

The issue seems to be in line "x++;" in the function saveLoginData().
You are declaring the X as member level variable, with X=0.
And as you increment the value of x in "saveLoginData()" function it becomes X=1, then while trying to access the array in parent function, the value of X is 1 now, but your array does not has any value stored for that index, which results in the exception.

In saveLoginData you're doing x++ at the end,
When you refer to loginData[x].Username in your message, x is not the same as it was when you setup loginData[x] = new Transactions(); and so loginData[x] will be null at that moment.

String firstString = fname[0].ToString();
String secondString = mi[0].ToString();
String thirdString = lname[0].ToString();
insted of above line try doing
String firstString = fname;
String secondString = mi;
String thirdString = lname;
Please refer below link for more details.
http://msdn.microsoft.com/en-us/library/ms228362.aspx

loginData[x] = new Transactions();
saveLoginData();
MessageBox.Show("Generated Username: " + loginData[x].Username + number + "\n" + "Please do not share this Information to anyone!");
The problem here is that the call to saveLoginData() increments the value of x, so when you show the MessageBox, the you're pointing to the next element in loginData, which is uninitialized.
This is a good illustration as to why you should be wary of using global variables. It's not obvious saveLoginData would modify x, which is probably why you made the mistake in the first place.
Also, if this weren't an exercise, I would recommend using List<Transactions> instead of an array, because it makes adding elements easier; you don't have to keep track of the number of elements yourself.
Finally, this fragment appears several times in your code:
number++;
loginData[x] = new Transactions();
saveLoginData();
MessageBox.Show("Generated Username: " + loginData[x].Username + number + "\n" + "Please do not share this Information to anyone!");
this.Hide();
Transaction tr = new Transaction();
tr.ShowDialog();
It would be better to turn this into a method which you would then call several times.

The Think is whenever we getting null reference .. it mean that it has not memory for that ..
so debug each and every line you can find the solution for that .. otherwise before using the properties put null check condition

Using Office.Interop, certain Powerpoint filenames won't convert

I have a program that converts .ppt or pptx files to png's using C# and the Microsoft.Office.Interop stuff.
It works most of the time, but under certain circumstances, it seems to fail on specific filenames for some nondescript reason.
HRESULT E_FAIL at ... Presentations.Open
It'll fail on CT_Stress_Test - Copy (16).pptx and CT_Stress_Test - Copy (11).pptx It works for (2) thru (19), but fails on only these two. My question is why?
If I were to make copies of these copies, or rename them to something else, it'll convert just fine, so I think it might have something to do with the filename.
I have the same conversion program running on my server and my local machine. My local machine (Win 7) converts the problem files just file. It's only on the server (Win 2008) that I have problems with these two filenames.
EDIT: I've found another number that doesn't work: (38)
EDIT: I formatted the strings with Path functions, and that didn't help.
EDIT: I was able to fix it by trimming all the spaces from the file names. I still want to know why this happens, though.
Here's the program:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Threading;
using System.IO;
using Microsoft.Office.Core;
using PowerPoint = Microsoft.Office.Interop.PowerPoint;
using System.Diagnostics;
using System.Timers;
using System.Security.Permissions;
using System.Collections.Concurrent;
namespace converter
{
class Program
{
public static int threadLimit=0;
public static string inDir;
public static string outDir;
public static string procDir;
public static Thread[] converterThreads;
public static BlockingCollection<string> todo;
static void Main(string[] args)
{
todo = new BlockingCollection<string>();
inDir = args[0];
outDir = args[1]+"\\";
procDir = args[2]+"\\";
Int32.TryParse(args[3],out threadLimit);
converterThreads = new Thread[threadLimit];
FileSystemWatcher watcher = new FileSystemWatcher(inDir); //Watcher "thread"
watcher.Filter = "*.ppt*";
watcher.NotifyFilter = watcher.NotifyFilter | NotifyFilters.CreationTime;
watcher.IncludeSubdirectories = false;
watcher.Created += new FileSystemEventHandler(fileChanged);
watcher.EnableRaisingEvents = true;
//Create consumer threads
for(var i=0;i<threadLimit;i++)
{
Conversion con = new Conversion();
converterThreads[i] = new Thread(new ThreadStart(con.watchCollection));
converterThreads[i].Start();
}
//stay open
Console.ReadLine();
}
//Producer
private static void fileChanged(object sender, FileSystemEventArgs e)
{
if(!(e.FullPath.Contains("~$"))){ //Ignore temp files
Console.WriteLine("found =" + e.FullPath);
todo.Add(e.FullPath);
}
}
}
class Logger{
static void toLog(String msg)
{
//TODO: log file
}
}
//Consumer
class Conversion
{
String input;
String output;
String outDir;
String process;
String nameWith;
String nameWithout;
string dir;
static List<CorruptFile> cFiles = new List<CorruptFile>();
int retryLimit = 20;
public Conversion()
{
this.outDir = Program.outDir;
this.process = Program.procDir;
}
//Continually watches collection for files to take.
public void watchCollection()
{
while (true)
{
System.Threading.Thread.Sleep(1000);
try
{
dir = Program.todo.Take();
if (dir != null)
{
this.nameWithout = Path.GetFileNameWithoutExtension(dir);
this.nameWith = Path.GetFileName(dir);
this.output = Path.GetDirectoryName(dir) + Path.DirectorySeparatorChar + Path.GetFileNameWithoutExtension(dir);
Console.WriteLine("output = " + this.output);
this.input = Path.GetFullPath(dir);
Console.WriteLine("thread took " + this.nameWith);
convertPpt();
}
}
catch (InvalidOperationException) { }
}
}
public void convertPpt()
{
try
{
var app = new PowerPoint.Application();
var pres = app.Presentations;
var file = pres.Open(input, MsoTriState.msoFalse, MsoTriState.msoFalse, MsoTriState.msoFalse);
file.SaveAs(output, Microsoft.Office.Interop.PowerPoint.PpSaveAsFileType.ppSaveAsPNG, MsoTriState.msoTrue);
file.Close();
app.Quit();
Console.WriteLine("file converted " + input);
moveFile();
}
catch (Exception e)
{
Console.WriteLine("convertPpt failed " + e);
try
{
foreach (Process proc in Process.GetProcessesByName("POWERPNT"))
{
proc.Kill();
Console.WriteLine("process killed");
}
}
catch (Exception e3)
{
}
try
{
if (!(cFiles.Any(x => x.fileName == dir)))
{
cFiles.Add(new CorruptFile(dir));
Console.WriteLine("file added to watch list");
Program.todo.Add(dir);
}
else
{
var found = cFiles.Find(x => x.fileName == dir);
Console.WriteLine("in watch list = " + found.fileName);
if (found.numRetry >= retryLimit)
{
Console.WriteLine(nameWith+ " to be ignored");
try
{
cFiles.Remove(found);
Console.WriteLine("File ignored");
System.Threading.Thread.Sleep(300);
Console.WriteLine("Moving: " + input);
if (File.Exists("C:\\corrupt\\" + nameWith))
{
File.Replace(input, "C:\\corrupt\\" + nameWith, null);
Console.WriteLine("file moved to C:\\corrupt\\");
}
else
{
File.Move(input, "C:\\corrupt\\" + nameWith);
Console.WriteLine("file moved to C:\\corrupt\\");
}
}
catch(Exception e5)
{
Console.WriteLine("could not move file " + e5);
}
}
else
{
Console.WriteLine("retrying file on watch list");
found.numRetry++;
Program.todo.Add(dir);
}
}
}
catch { }
}
moveDir();
}
public void moveFile()
{
Console.WriteLine("moving" + input);
try
{
System.Threading.Thread.Sleep(500);
Console.WriteLine(string.Format("moving {0} to {1}", input, process + nameWith));
if (File.Exists(process + nameWith))
{
File.Replace(input, process + nameWith, null);
}
else
{
File.Move(input, process + nameWith);
}
}
catch (Exception e)
{
Console.WriteLine(string.Format("Unable to move the file {0} ", input) + e);
try
{
foreach (Process proc in Process.GetProcessesByName("POWERPNT"))
{
proc.Kill();
}
}
catch (Exception e3)
{
}
}
}
public void moveDir()
{
if(!Directory.Exists(output)){
return;
}
Console.WriteLine("moving dir " + output);
try
{
Console.WriteLine(string.Format("moving dir {0} to {1} ", output, outDir + nameWithout));
if (Directory.Exists(outDir + nameWithout))
{
Directory.Delete(outDir + nameWithout, true);
}
if (Directory.Exists(output))
{
Directory.Move(output, outDir + nameWithout);
}
}
catch (Exception e)
{
Console.WriteLine(string.Format("Unable to move the directory {0} ", output) + e);
try
{
foreach (Process proc in Process.GetProcessesByName("POWERPNT"))
{
proc.Kill();
}
}
catch (Exception e3)
{
}
}
}
}
class CorruptFile{
public string fileName;
public int numRetry;
public CorruptFile(string fn){
fileName = fn;
}
}
}

First up is a warning from Microsoft in this KB article here. Money quote is:
Microsoft does not currently recommend, and does not support,
Automation of Microsoft Office applications from any unattended,
non-interactive client application or component (including ASP,
ASP.NET, DCOM, and NT Services), because Office may exhibit unstable
behaviour and/or deadlock when Office is run in this environment.
Next question is why not use OpenXML for this? Here's a simple sample to get you started which counts the number of slides in a deck.
using System;
using System.Collections.Generic;
using System.IO;
using System.IO.Packaging;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml;
namespace OpenXmlDemo
{
class PptOpenXmlDemo
{
public int PptGetSlideCount(string fileName)
{
// Return the number of slides in a PowerPoint document.
const string documentRelationshipType = "http://schemas.openxmlformats.org/officeDocument/2006/relationships/officeDocument";
const string presentationmlNamespace = "http://schemas.openxmlformats.org/presentationml/2006/main";
int returnValue = 0;
using (Package pptPackage = Package.Open(fileName, FileMode.Open, FileAccess.Read))
{
// Get the main document part (presentation.xml).
foreach (System.IO.Packaging.PackageRelationship relationship in pptPackage.GetRelationshipsByType(documentRelationshipType))
{
// There should be only a single relationship that refers to the document.
Uri documentUri = PackUriHelper.ResolvePartUri(new Uri("/", UriKind.Relative), relationship.TargetUri);
PackagePart documentPart = pptPackage.GetPart(documentUri);
// Get the slide part from the package.
if (documentPart != null)
{
XmlDocument doc = new XmlDocument();
doc.Load(documentPart.GetStream());
// Manage namespaces to perform XPath queries.
XmlNamespaceManager nsManager = new XmlNamespaceManager(doc.NameTable);
nsManager.AddNamespace("p", presentationmlNamespace);
// Retrieve the list of slide references from the document.
XmlNodeList nodes = doc.SelectNodes("//p:sldId", nsManager);
if (nodes != null)
{
returnValue = nodes.Count;
}
}
// There is only one officeDocument part. Get out of the loop now.
break;
}
}
return returnValue;
}
}
}

Dynamically Creating a code from a string,executing it to call a form.showdialog() method;

I have managed to create a dynamically created string to compile as a code,it does the basic stuff like MessageBox.Show or create integers,strings etc.Now i want to open an instance of a from from my generated code,how can i achieve that?I used a code i found from the net to start,as stated below.Regards.
string lcCode = this.memoEdit1.Text;
lcCode = #"
using System;
using System.IO;
using System.Windows.Forms;
namespace MyNamespace {
public class MyClass {
public object DynamicCode(params object[] Parameters) {
" + lcCode +
"return (object) DateTime.Now;"+
"} } }";
ICodeCompiler loCompiler = new CSharpCodeProvider().CreateCompiler();
CompilerParameters loParameters = new CompilerParameters();
// ref assmbles lazım ekle,mssql vs.
loParameters.ReferencedAssemblies.Add("System.dll");
loParameters.ReferencedAssemblies.Add("System.Windows.Forms.dll");
loParameters.GenerateInMemory = true;
// yuru
CompilerResults loCompiled = loCompiler.CompileAssemblyFromSource(loParameters, lcCode);
#region errör
if (loCompiled.Errors.HasErrors)
{
string lcErrorMsg = "";
// erörrler
lcErrorMsg = loCompiled.Errors.Count.ToString() + " Errors:";
for (int x = 0; x < loCompiled.Errors.Count; x++)
lcErrorMsg = lcErrorMsg + "\r\nLine: " + loCompiled.Errors[x].Line.ToString() + " - " +
loCompiled.Errors[x].ErrorText;
MessageBox.Show(lcErrorMsg + "\r\n\r\n" + lcCode, "Erörrz", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
# endregion
//this.memoEdit1.Text = lcCode;
Assembly loAssembly = loCompiled.CompiledAssembly;
// Object dinamik !!!!1!1 o yüzden obje kalsın!
object loObject = loAssembly.CreateInstance("MyNamespace.MyClass");
if (loObject == null)
{
MessageBox.Show("Class error");
return;
}
object[] loCodeParms = new object[1];
loCodeParms[0] = "Test";
try
{
object loResult = loObject.GetType().InvokeMember("DynamicCode",BindingFlags.InvokeMethod, null, loObject, loCodeParms);
//MessageBox.Show("Method Call Result:\r\n\r\n" + loResult.ToString(), "Sonuç", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
catch (Exception loError)
{
MessageBox.Show(loError.Message, "Erörrz", MessageBoxButtons.OK, MessageBoxIcon.Information);
}