|
I have a WPF-client. Code in C#. I have a database with application that we want to block from starting.
We have different users. They login to the WPF-client. We want to block different application from starting for different users.
I want to prevent the application from starting.
I'm hoping for some tips on how I solve this 
|
|
|
|
|
Oscar Andersson wrote: We want to block different application from starting for different users.
Again, a sysadmin thingy; if the user is a local admin, then he/she decides what gets started.
Bastard Programmer from Hell 
If you can't read my code, try converting it here[^]
|
|
|
|
|
The users are not admins. It is the application (wpf-client) that shall do the blocking of the applications. It will be other people that decides what applications that is blocked. They decides which applications on the computer that shall be block. They put in this infomation in to the database from a webpage that is used for administration.
|
|
|
|
|
I am trying this solution. In this test solution i kill all application that starts. If you see anything strange or something that is wrong. Let me know. I hop this help other
// I call this method when i start my wpf-client
private bool Run()
{
bool bRun = false;
try
{
WqlEventQuery query = new WqlEventQuery("__InstanceCreationEvent", new TimeSpan(0, 0, 1), "TargetInstance isa \"Win32_Process\"");
m_Watcher = new ManagementEventWatcher(query);
m_Watcher.Options.Timeout = new TimeSpan(0, 0, 5);
m_Watcher.EventArrived += new EventArrivedEventHandler(HandleEvent);
m_Watcher.Start();
}
catch (Exception exc)
{}
return bRun;
}// End of Run
// Method that handle events from ManagementEventWatcher
private void HandleEvent(object sender,EventArrivedEventArgs e)
{
try
{
ManagementEventWatcher watch = sender as ManagementEventWatcher;
ManagementBaseObject manBasObj = null;
String strName = String.Empty;
String strPath = String.Empty;
String strPID = String.Empty;
if (watch != null)
{
Object obj;
manBasObj = e.NewEvent;
obj = ((ManagementBaseObject)manBasObj["TargetInstance"])["Name"];
if (obj is String)
strName = obj.ToString();
obj = ((ManagementBaseObject)manBasObj["TargetInstance"])["ExecutablePath"];
if (obj is String)
strPath = obj.ToString();
obj = ((ManagementBaseObject)manBasObj["TargetInstance"])["processId"];
if (obj != null)
{
try
{
strPID = obj.ToString();
}
catch (Exception exc){}
}
//str = String.Format("Process {0} has been created, path is: {1} , PID: {2}",strName,strPath,strPID);
KillProcess(strName, strPath, strPID);
}
}
catch (Exception exc)
{
}
}// End of HandleEvent
// Method that kill the process
private void KillProcess(String strName, String strPath, String strPid)
{
try
{
Process proc = null;
if (!String.IsNullOrEmpty(strPid))
{// We have PID
proc = Process.GetProcessById(int.Parse(strPid));
proc.Kill();
}
// If you want to kill process by name we can do this
/*Process[] pro;
if(!String.IsNullOrEmpty(strName))
{// We have name
pro = Process.GetProcessesByName(strName);
foreach (Process p in pro)
{
p.Kill();
}
}*/
}
catch (Exception exc)
{
}
}// End of KillProcess
|
|
|
|
|
Why do you start with "I have a WPF-client. Code in C#"? Did you decide for the technology first, before you actually looked at the problem? Look at Windows Group Policies. That might help you.
Writing an application which kills all unwanted processes is just a wrong approach.
|
|
|
|
|
We are building a new product for the market. The wpf-client is one part of this product. We have other functions to in this client. We also have a webbsajt as part of this product. 
|
|
|
|
|
I have a problem at work.
I have a WPF-client. Code in C#.
I have a database with url's. We want to block the webbrowser from reaching these webpages.
We have different users. They login to the WPF-client. We want to block different url's for different users.
This shall work for different webbrowsers to.
I have looked at the host file. But i think it is one host file for every user on the computer.
Does webbrowser like IE, Firefox, Chrome, Opera have a API that i can use for this?
I would be really grateful for some advice about this
|
|
|
|
|
Please delete your duplicate of this question, posted above.
Use the best guess
|
|
|
|
|
Oscar Andersson wrote: We want to block the webbrowser from reaching these webpages.
That's not a code-thing, it's something for the sysadmin.
Oscar Andersson wrote: But i think it is one host file for every user on the computer.
A host file is a per-computer setting.
Oscar Andersson wrote: Does webbrowser like IE, Firefox, Chrome, Opera have a API that i can use for this?
The browsers do not offer an API to block certain sites; it'd be useless since anyone could still use another app to fetcht the HTML.
Like FTP.
Bastard Programmer from Hell
If you can't read my code, try converting it here[^]
|
|
|
|
|
The short answer is you cannot prevent a process from starting. You can kill it if it shows up.
Well, the long answers is it's possible with a ton of research work and using the Detours library to do some API hooking of the CreateProcess functions.
This is FAR better done through Group Policy. Group Policy has White and Black lists for allowing or preventing applications from running.
As for blocking web sites, this is stadandard functionality for any off-the-shelf proxy server.
...in other words... you don't need to write a single line code to do any of this stuff. This is all stuff that's better left to network administrators and their tools.
|
|
|
|
|
The first part of you answer is for my other question about blocking applications from starting from a wpf-client. I have a solution for that. Se my other question. I hope it is ok for our product.
We cant do this in the network. It will be a product that people install at their computers 
|
|
|
|
|
Oscar Andersson wrote: It will be a product that people install at their computers
Block a webbrowser (without knowing what is reading from the socket at port 80) on a clients computer?
You do realize people can also simply uninstall it?
Bastard Programmer from Hell
If you can't read my code, try converting it here[^]
|
|
|
|
|
We will have a list of webpages they cant visit. A blacklist of webpages. The customer can add and remove webpages to this blacklist.
If they want to uninstall producten is up to them. They pay for this Product 
|
|
|
|
|
It doesn't change the fact that you'll still be writing a proxy server. The server wiil just be installed on the clients machine and everything that goes through TCP/IP will have to go through the proxy.
And in order to do this and prevent everything from bypassing your proxy simply by not specifying the proxy server to use, you'll have to write an NDIS driver to stick into the network stack to prevent this -- which you're not going to do in C#.
|
|
|
|
|
Your problem has nothing to do with WPF. What you need is some type of web proxy configuration. Either you set up a proxy server, or you create proxy.pac scripts for your users which will forward the request to be blocked to 127.0.0.1 (ie.e localhost, which will not respond with the expected web site). Any browser can use proxy.pac scripts.
|
|
|
|
|
Hey guys,
im pretty new to C# coding and im trying to pair my Dell Laptop (64Bit) and my Asus Win8 Tablet(32Bit) via Bluetooth.
I already found the 32feet.net library and startet coding.
My code worked just 1 time. I didnt get any answer from Tablet since then..
Here is my code, i hope someone can help me. (Its just a small one for testing)
public partial class Form1 : Form
{
private static string BTMacAddress = "00:00:00:00:00:00";
private static string Pin = "123testpin321";
private BluetoothClient Device = new BluetoothClient();
private static BluetoothAddress BTAddress = BluetoothAddress.Parse(BTMacAddress);
private BluetoothEndPoint BTEndpoint = new BluetoothEndPoint(BTAddress, BluetoothService.DialupNetworking);
public Form1()
{
InitializeComponent();
}
private void BTConnect_Click(object sender, EventArgs e)
{
if(!BluetoothSecurity.PairRequest(BTAddress,Pin))
MessageBox.Show("Failed");
else
MessageBox.Show("Done");
}
}
|
|
|
|
|
Hi, all.
First, sorry for my poor english.
Problem need a collection with elements, one of the properties must be unique.
Like this
public class Pet
{
public string Name {get; set;}
public int Age {get; set;}
}
public class Pets: Collection<Pet>
{ ...
public Pet this[string name]
{
get { return LookupPetByName(name); }
set
{
if (HavePetWithName(name))
throw new DublicateNameException(name);
SetPet(name, value);
}
}
...}
This work fine when I use indexer. But I need throw exeption, when I got object by index and change his name.
Pets.Add(new Pet("Ares", 3);
Pets.Add(new Pet("Mike", 6);
var myPet = Pets["Ares"];
myPet.Age = 3;
myPet.Name = "Mike";
Can you suggest me where to dig?
Thanks.
|
|
|
|
|
If your collection has only two Properties in it, and you wish to make sure that one of those Properties is never a duplicate: you have an easy solution.
Create a Dictionary where the Property you don't want to allow duplicates of is the Key, and the other Property is the Value:
private Dictionary<string, int> Pets = new Dictionary<string, int>(); To use this, somewhere in your code do something like this:
Pets.Add("Ares", 3);
Pets.Add("Mike", 6);
string keyToGet = "Ares";
var testKVP = Pets.FirstOrDefault(kvp => kvp.Key == keyToGet);
if (testKVP.Key == null) return;
~
“This isn't right; this isn't even wrong." Wolfgang Pauli, commenting on a physics paper submitted for a journal
|
|
|
|
|
I think that a different collection type won't help. Rather, I'd implement INotifyPropertyChanged in the objects to be collected, and subscribe that event in the Add function of the collection (and unsubscribe in the Remove function). In the event handler, check your constraint, and throw an exception when required.
|
|
|
|
|
How To Add Buttons In Textbox?
|
|
|
|
|
You cannot drag-and-drop a Button into a TextBox Control at design-time, but, yes, you could, in code, add one to the Controls Collection of a TextBox.
private void Form1_Load(object sender, EventArgs e)
{
this.Controls.Remove(button1);
textBox1.Controls.Add(button1);
button1.Location = new Point(2, 2);
button1.Click += button1_Click;
}
private void button1_Click(object sender, EventArgs e)
{
MessageBox.Show("Monster speaking: 'in the TextBox: A Button'");
}But, what you end up with is a mess:
The Button will obscure what you are typing that is in the Button's DisplayRectangle ... unless you do some real weird stuff ... not even sure it could be done ... to make sure that when you typed, what you typed would never be covered over by the Button.
Believe me: you do not want to do the above !
The simple way to achieve a combination of Button(s) and TextBox, in one nice package, is to create a UserControl, and put the Button(s) where you like, and the TextBox where you like.
~
“This isn't right; this isn't even wrong." Wolfgang Pauli, commenting on a physics paper submitted for a journal
modified 21-Aug-13 3:03am.
|
|
|
|
|
|
BillWoodruff wrote: The simple way to achieve a combination of Button(s) and TextBox, in one nice package, is to create a UserControl,
Or just put them both in a Panel?
/ravi
|
|
|
|
|
Good point, Ravi. I tend to make UserControls, perhaps because it's become "natural" for me to do so, and, if I create something with multiple controls wired together, interacting, etc., that's often something that I will want to re-use in the future, in other applications, which is so easy if it's a UserControl.
yours, Bill
~
“This isn't right; this isn't even wrong." Wolfgang Pauli, commenting on a physics paper submitted for a journal
|
|
|
|
|
Agree 100% for reuse. 
/ravi
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
