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Can you tell me what is wrong with this code?
In an exisitng C#.net 2008 desktop application, I want to setup a class .cs file so I can do security checks against the active directory. I want to add this code to a project file that contains lots of common routines all the other processing modules use. The code is the following:
using System;
using System.Reflection;
using System.Runtime.Remoting;
using System.IO;
using System.Threading;
using System.Windows.Forms;
using System.Security.Principal;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace En.Common
{
class ActiveDirectory
{
AppDomain.CurrentDomain.SetPrincipalPolicy(PrincipalPolicy.WindowsPrincipal);
//Thread.CurrentPrincipal = new WindowsPrincipal(WindowsIdentity.GetCurrent());
//if ((!Thread.CurrentPrincipal.IsInRole("testit")))
}
}
I want to start with 3 lines of code listed so far. However, the statement,
AppDomain.CurrentDomain.SetPrincipalPolicy(PrincipalPolicy.WindowsPrincipal);
However I am getting the following two errors on this statement:
Error 94 Invalid token '(' in class, struct, or interface member declaration
Error 95 Invalid token ')' in class, struct, or interface member declaration
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You need to put your statements into a method or constructor. At the moment it is like you are declaring then as class level variables.
Next time please put your code into Code Blocks. It makes it much easier to read!
Live for today. Plan for tomorrow. Party tonight!
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I've created a custom control with a non-rectangluar border.
I'm trying to set the region properly and struggling to get a *filled* region.
I can make it the outline of my control, but then you can't drag the control from the middle.
How do I *fill* a region?
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The Region property should be set to a collection of closed subpaths. Use the GraphicsPath methods to add a closed shape (e.g. AddPolygon, AddEllipse etc) or call CloseFigure for each subpath.
E.g. a circular control:
private void AdjustRegion()
{
GraphicsPath path = new GraphicsPath();
path.AddEllipse(-(Size * 0.5f) - 2, -(Size * 0.5f) - 2, Size + 4, Size + 4);
this.Region = new Region(path);
}
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mmm, I've got a series of lines added to a Path, and I do then call CloseFigure. But the region is *just* those lines, not the space enclosed by them.
Even if I add a rectangle to the path, its just the rectangles edge that gets added, not the area covered by it.
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Are you assigning Region (property) to a new Region object like in my example?
I took that from a (more complex) working example in real code so it definitely works.
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Yep, tis the same assignment...and I've got it working in another project as well...just have to keep looking.
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Hi,
I have created a program e.g. test.exe by C#.net and I want to
associate file extension (eg .tst) with the test.exe in the window registry.
But I found that most commercial program specifying file type in window registry by CLSID, (so the file type may be opened by the program for the dll specifid by the CLSID) which is only for dll. I have only an exe and I can specify opening the file type in the open subKey in the registry. But how can I specify the file type with a dll(CLSID) which in my case I dont have ?
or how can I convert my exe into dll so I can open the file type by the dll ?
Thanks
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This isn't really a C# question.
File associations are stored in HKEY_CLASSES_ROOT/.ext. Most file types then have an almost empty key with the default value pointing to another key (typically 'extfile'). In that key, the default value is the friendly name for the type (appears in Windows Explorer and the File Types dialog). To associate the file type with a program, create a subkey Shell/open/command and for the default value in there, put the command to run (typically something like path/myapp.exe "%1").
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Have done somethingg similiar. In the code below the file extension to be opened by the app is .stockcheckdata . This extension then needs to be associated with app, in my example the one being opened.
Registry.ClassesRoot.CreateSubKey(".stockcheckdata").SetValue("", "stockcheckdata", RegistryValueKind.String);
Registry.ClassesRoot.CreateSubKey(@"stockcheckdata\shell\open\command").SetValue("", Application.ExecutablePath + " \" %1 \"", RegistryValueKind.String);
Hope it helps?!
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Try double-clicking the file and then tell Windows which app to use to open it.
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Hi
I have a code in c# to read data in excelsheet.
string connstr = "provider = Microsoft.Jet.Oledb.4.0;Data Source='C:\\aaa.xls';Extended Properties=Excel 8.0;";
OleDbConnection conn = new OleDbConnection(connstr);
string strSQL = "SELECT * FROM [Sheet1$]";
OleDbCommand cmd = new OleDbCommand(strSQL, conn);
DataSet ds = new DataSet();
OleDbDataAdapter da = new OleDbDataAdapter(cmd);
da.Fill(ds);
dt = ds.Tables[0];
While reading i could not get few values in a particular column(say column B) and the values that are not being read are completely numeric(12345) while the others are alpha numeric(Ex: e0345) in the same column.
Example
Column B in excel has values as below
U098ij
i097hl
123453
gdtr56
When i see in the dataset, 3rd value is null. Dont know where i am going wrong. Please help me
Thanks in advance
Naina
Naina
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There is a universal problem when accessing excel through ADO and that is that ADO only scans the first 8 lines and then chooses what data type to return based on the data type of the majority of the returned results. Thus if the majority of the returned results are strings, then it thinks that all the data should be returned as strings, and ignores other data types. The best way to get around this is to add the instruction IMEX=1 to the extended properties instruction in the connection string. Thus your connection string would now look like this:
string connstr = @"provider = Microsoft.Jet.Oledb.4.0;Data Source='aaa.xls';Extended Properties='Excel 8.0;IMEX=1'";
Of course, the problem with this is that all your data is returned as a string, and numeric values will need to be parsed.
Hope this helps
Live for today. Plan for tomorrow. Party tonight!
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Wayne
Does this force large numbers into e##### format when converting to strings?
Never underestimate the power of human stupidity
RAH
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Yes, unfortunately it does do this if you have the cell format set to general or number. This can lead to a serious loss of data. If you format the cells to currency or accounting, then you get the actual value.
Live for today. Plan for tomorrow. Party tonight!
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Hi
Thanks for your reply and now i have included IMEX to extended properties. Now the problem is, large numbers are converted into e**** format
Regards
Naina
Naina
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Hi, please read my answer to Mycroft above. The only solution is to format your cells as accounting or currency.
Live for today. Plan for tomorrow. Party tonight!
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Hello,
I made an application with clients who connect to a server with .Net remoting. The client requests some values from the server and then the server putts all these request in a buffer (buffer is necessary) and emptys them each 500ms, these requests are send to a "black box" on a socket connection, and then the answer of the black box is being send back to the client with an eventhandler.
Now I have something like
remoteServer.GetValue(Name);
which is given back to the client in an event
But what I want is getting something like this.
Int32 receivedVal = (Int32)remoteServer.GetValue(Name);
Does anyone know the solution?
Thank you 
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My suggestion may not be usable by you:
First get rid of remoting services and deploy your service as a WCF service.
Second make sure your WCF service is NOT deployed as Asynchronous.
Third pull the 'black box' into your service so make it a class that you can instantiate and call internally.
When your service gets the answer back then return it.
In the WCF service your service would be written as if it was an inline method call making the setup quite simple. It also gets rid of the buffering and polling.
If you cannot get rid of the black box behaviour then you might be SOL.
Software Zen: delete this;
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My goal is to try to use the same logic when verifying groups in the active directory for users if they are on the web or in a windows application. However my current problem is the web application is currently using a config file and having users enter their user name and password. The windows application is having the user click on a desktop shortcut and the application obtains the user infromation from windows authenication.
Is there a way to make code listed in the windows application be more like the web application?
If not,why not?
If so, how would you change the code to make to the windows application?
The windows code is the following:
AppDomain.CurrentDomain.SetPrincipalPolicy(PrincipalPolicy.WindowsPrincipal);
hread.CurrentPrincipal = new WindowsPrincipal(WindowsIdentity.GetCurrent());
if ((!Thread.CurrentPrincipal.IsInRole("TEST"))
{
MessageBox.Show("Please contact your network administrator if you have any questions",MessageBoxIcon.Error);
return;
}
else
{
Application.Run(new newm());
break;
}
The web code is the following:
using System;
using System.Collections.Generic;
using System.Text;
using System.DirectoryServices;
namespace RtSup
{
public class Validator
{
private string _path;
private string _filterAttribute;
public Validator(string path)
{
_path = path;
}
public bool IsAuthenticated(string domainName, string userName, string password)
{
string domainAndUsername = domainName + @"\" + userName;
DirectoryEntry entry = new DirectoryEntry(_path, domainAndUsername, password);
try
{
Object obj = entry.NativeObject;
DirectorySearcher search = new DirectorySearcher(entry);
search.Filter = "(SAMAccountName=" + userName + ")";
search.PropertiesToLoad.Add("cn");
SearchResult result = search.FindOne();
if (null == result)
{
return false;
}
_path = result.Path;
_filterAttribute = (String)result.Properties["cn"][0];
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
return true;
}
}
}
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I would like to setup a switch statement in a C#.net 2008 desktop application. I basically want to check for who has 'group' access according to the active directory. The following is the two statements I am using to obtain the active directory groups.
AppDomain.CurrentDomain.SetPrincipalPolicy(PrincipalPolicy.WindowsPrincipal);
Thread.CurrentPrincipal = new WindowsPrincipal(WindowsIdentity.GetCurrent());
Some how I would need to use Thread.CurrentPrincipal. How would you set this up in the switch statement?
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I don't see why you would decide on syntax before having a concept of the task -- what is it that you want to accomplish?
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You can't. Switch statements can only work on constant values - Thread.CurrentPrincipal is a reference type so it's value range cannot be evaluated as a compile time constant.
Real men don't use instructions. They are only the manufacturers opinion on how to put the thing together.
Manfred R. Bihy: "Looks as if OP is learning resistant."
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I showed you how determine group membership in this post[^]
You need to use the IsInRole method of the CurrentPrincipal object to check for membership, which you could do in a simple if statement.
if (Thread.CurrentPrincipal.IsInRole(@"MYDOMAIN\MyApplicationAdministrators")
{
}
else if (Thread.CurrentPrincipal.IsInRole(@"MYDOMAIN\MyApplicationMangers")
{
}
You wouldn't really use a switch statement for this. Also, you can use imperative or declarative security to check for group membership at method level as well, e.g.
http://msdn.microsoft.com/en-us/library/system.security.permissions.principalpermissionattribute.aspx[^]
[PrincipalPermission(SecurityAction.Demand, Role = "MYDOMAIN\MyApplicationAdministrators")]
static void CheckAdministrator()
{
Console.WriteLine("User is an administrator");
}
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Hello, i have designed a window in c# which contains one combobox(contains detected USB devices), one picturebox(for the video), one label, one start button(starts the camera)and one refresh button.
I have a USB security IR camera which i want to connect to the computer and hopefully get some video feed in the picturebox.
I have debugged and builded the project and the designed window pops up as it should. When i push the refresh button while the USB camera is connected,it is written in the combobox "USB 2.0 grabber". When i then push the start button nothing happens. Can somebody help me/explain to me how to get the video feed into the picture box? I really appreciate some help. 
Source code follows:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using AForge.Video;
using AForge.Video.DirectShow;
namespace cam_aforge1
{
public partial class Form1 : Form
{
private bool DeviceExist = false;
private FilterInfoCollection videoDevices;
private VideoCaptureDevice videoSource = null;
public Form1()
{
InitializeComponent();
}
private void getCamList()
{
try
{
videoDevices = new FilterInfoCollection (FilterCategory.VideoInputDevice);
comboBox1.Items.Clear();
if (videoDevices.Count == 0)
throw new ApplicationException();
DeviceExist = true;
foreach (FilterInfo device in videoDevices)
{
comboBox1.Items.Add(device.Name);
}
comboBox1.SelectedIndex = 0;
}
catch (ApplicationException)
{
DeviceExist = false;
comboBox1.Items.Add("No capture device on your system");
}
}
private void rfsh_Click(object sender, EventArgs e)
{
getCamList();
}
private void start_Click(object sender, EventArgs e)
{
if (start.Text == "&Start")
{
if (DeviceExist)
{
videoSource = new VideoCaptureDevice(videoDevices[comboBox1.SelectedIndex].MonikerString);
videoSource.NewFrame += new NewFrameEventHandler(video_NewFrame);
064 CloseVideoSource();
videoSource.DesiredFrameSize = new Size(160,120);
videoSource.Start();
label2.Text = "Device running...";
start.Text = "&Stop";
timer1.Enabled = true;
}
else
{
label2.Text = "Error: No Device selected.";
}
}
else
{
if (videoSource.IsRunning)
{
timer1.Enabled = false;
CloseVideoSource();
label2.Text = "Device stopped.";
start.Text = "&Start";
}
}
}
private void video_NewFrame(object sender, NewFrameEventArgs eventArgs)
{
Bitmap img = (Bitmap)eventArgs.Frame.Clone();
pictureBox1.Image = img;
}
private void CloseVideoSource()
{
if (!(videoSource == null))
if (videoSource.IsRunning)
{
videoSource.SignalToStop();
videoSource = null;
}
}
private void timer1_Tick(object sender, EventArgs e)
{
label2.Text = "Device running... " + videoSource.FramesReceived.ToString() + " FPS";
}
private void Form1_FormClosed(object sender, FormClosedEventArgs e)
{
CloseVideoSource();
}
}
}
<pre>
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