Re: How to validate the inputs - C# Discussion Boards

mav.northwind25-Dec-07 23:56

25-Dec-07 23:56

Hi!
The application that "you are ready to buy" is called explorer.exe and part of each windows installation.
Or you can click start>run, enter cmd and then use the copy command to copy files.

It doesn't matter how large the files are or how fast your network is in principle, copying works exactly the same...

Regards,
mav

--
Black holes are the places where God divided by 0...

Re: Apllication that will copy files

Waleed Eissa26-Dec-07 6:15

Waleed Eissa

26-Dec-07 6:15

Are you trying to copy the files to all the computers on your network?

Waleed Eissa
.NET Software Developer in Sydney

How to apply patches...?

Pankaj - Joshi25-Dec-07 16:51

Pankaj - Joshi

25-Dec-07 16:51

Hello experts,

I have a desktop application and I want to give a utility to upgrade the application using web or apply patches.

Suppose I have two customers and one needs inventory module and other needs payroll module with actual application then how I can do this in single application...?

Also If I change some logic (Suppose bug fixes) then How I provide patches to end user...?

Regards
Pankaj Joshi

If you want to shape your dreams into reality, please wake-up...

Re: How to apply patches...?

Jeeva Jose25-Dec-07 22:20

Jeeva Jose

25-Dec-07 22:20

Instalation pakage keep a registry key.The key contain the information where the file have place.

Make a patch file with a cab or zip file.

make a small application with a patch button.

if u click the button copy the file and paste to the destination location

the location read from the registery

It is a same one.

Continue...

class design

netJP12L25-Dec-07 10:56

netJP12L

25-Dec-07 10:56

Hi guys, I am trying to implement a design for my classes. So far everything seems to be working the way they are structured. However, there are a few problems:
a) How can I build a relationship between the Rectangle(store data) and RectangleUser(Control) classes
b) As you have noticed, the Rectangle class object is assigned to the PropertyGrid Control and its properties will be exposed to the PropertyGrid. Lets say, if i change the X property through the PropertyGrid control the actual RectangleControl object Location which is shown on the form1 wouldn't be changed becuase there is no relationship.

The way I am thinking is to have an object that would would listen if the data is changed in accordance to that it will change the RectangleControl class values. Is there any better way to do than this.
Form1.cs
{
PropertyGrid pg = new PropertyGrid();
Rectangle r = new Rectangle(0,0,200,200);
RectangleControl rc = new RectangleControl(r);
Form1.Controls.Add(rc);

pg.SelectedObject=r;
}
Shape
{
int _X;
int _Y;
int _Width;
int _Height;

public Shape(int x, int y, int width, int height)
{
this._X=x;
this._Y=y;
this._Width=width;
this._Height=height;
}

}

Rectangle:Shape
{
public Rectangle(int x, int y, int width, int height)
{
this._X=x;
this._Y=y;
this._Width=width;
this._Height=height;
}
}

ShapeControl:UserControl
{
}

RectangleControl:ShapeControl
{
public RectangleControl(Rectangle r)
{
this.Location = new Point(r._X,r._Y);
this.Width = r._Width;
this.Height = r._Height;
}

}

Re: class design

KaptinKrunch26-Dec-07 9:26

KaptinKrunch

26-Dec-07 9:26

From what I can understand from your code, you have defined or are trying to define 3 classes (Shape, Rectangle, and RectangleControl).

All of these provide one constructor. But there is no implementation of any of these. In addition, I feel your over using the 'this' object.

I'd re-evaluate what your trying to accomplish and recode accordingly. If you are simply trying to change the width/height of your RectangleControl control, expose those properties and simply change the values.

<br />
RectangleControl rc = new RectangleControl(r);<br />
rc.width = 200;<br />
rc.height = 200;<br />

Just because we can; does not mean we should.

How to validate the inputs

Kefaleas Stavros25-Dec-07 10:26

Kefaleas Stavros

25-Dec-07 10:26

How can I alter this code

<br />
using System;<br />
<br />
public class Analysis<br />
{<br />
   public void ProcessExamResults()<br />
   {<br />
      // initializing variables in declarations<br />
      int passes = 0; // number of passes<br />
      int failures = 0; // number of failures<br />
      int studentCounter = 1; // student counter<br />
      int result; // one exam result from user<br />
<br />
      // process 10 students using counter-controlled repetition<br />
      while ( studentCounter <= 10 )<br />
      {<br />
         // prompt user for input and obtain value from user<br />
         Console.Write( "Enter result (1 = pass, 2 = fail): " );<br />
         result = Convert.ToInt32( Console.ReadLine() );<br />
<br />
         // if...else nested in while <br />
         if ( result == 1 ) // if result 1,<br />
            passes = passes + 1; // increment passes           <br />
         else // else result is not 1, so<br />
            failures = failures + 1; // increment failures<br />
<br />
         // increment studentCounter so loop eventually terminates<br />
         studentCounter = studentCounter + 1;<br />
      } // end while<br />
<br />
      // termination phase; prepare and display results<br />
      Console.WriteLine( "Passed: {0}\nFailed: {1}", passes, failures );<br />
<br />
      // determine whether more than 8 students passed<br />
      if ( passes > 8 )<br />
         Console.WriteLine( "Raise Tuition" );<br />
   } // end method ProcessExamResults<br />
} // end class Analysis<br />

so that it can validate its inputs.I want the app to keep looping until the user enters a correct value.
Thnx!

Re: How to validate the inputs

Ed.Poore25-Dec-07 14:48

Ed.Poore

25-Dec-07 14:48

Firstly, this looks surprisingly like a homework question.
Secondly, this is very simple.
Thirdly, it would help if you specified what valid inputs are (I know I could read them from the code but I'm lazy).

My Blog[^]

Re: How to validate the inputs

KaptinKrunch26-Dec-07 8:06

KaptinKrunch

26-Dec-07 8:06

Write a static function that checks for a valid input entry. Then for each entry, pass it through the function

Example function

public static bool IsValidEntry(int entry)
{
switch(entry)
{
case 1:
return false;
break;
case 2:
return true;
break;
default:
return false;
}
}

Effective Security Access Check

Jeffrey Walton25-Dec-07 7:42

Jeffrey Walton

25-Dec-07 7:42

Hi All,

I want to check in advance on Write permission to a Directory for a sanity check. It is similar to File.Exist() and Directory.Exist().

I haven't been able to get the keywords correct to find the function. So far, I seem to be hitting on CAS (a miserable embodiment for System Administrators).

Can anyone point me in the proper direction?

Jeff

Re: Effective Security Access Check

Jeffrey Walton25-Dec-07 8:05

Jeffrey Walton

25-Dec-07 8:05

Here's what I have hacked so far. There are two problems.

1) I can't seem to work with GetAccessRule()
2) I don't know how to make the compare, even though I believe I have all the players assembled.

Jeff

DirectoryInfo information = new DirectoryInfo(directory);
DirectorySecurity security = information.GetAccessControl();

WindowsIdentity user = WindowsIdentity.GetCurrent();
SecurityIdentifier sid = user.User;

// Passing sid below will not compile
AuthorizationRuleCollection rules =
security.GetAccessRules(false, true, /*???*/);

// How is the check performed?
if( HasWriteAccess( rules ) )

Re: Effective Security Access Check

martin_hughes26-Dec-07 2:11

martin_hughes

26-Dec-07 2:11

This guy seems to have done the same thing... http://www.eggheadcafe.com/software/aspnet/30271754/check-users-directory-per.aspx[^]

"On one of my cards it said I had to find temperatures lower than -8. The numbers I uncovered were -6 and -7 so I thought I had won, and so did the woman in the shop. But when she scanned the card the machine said I hadn't.

"I phoned Camelot and they fobbed me off with some story that -6 is higher - not lower - than -8 but I'm not having it."
-Tina Farrell, a 23 year old thicky from Levenshulme, Manchester.

Re: Effective Security Access Check

Jeffrey Walton28-Dec-07 8:08

Jeffrey Walton

28-Dec-07 8:08

Hi Martin,

martin_hughes wrote:
This guy seems to have done the same thing

I ran across that earlier. His implementation is flawed. He does not consider a User Account ACE versus a Group ACE.

This means if an object has a DACL with a User Allow _and_ a Group Deny, the code will incorrectly return the object is not accessible.

Jeff

Re: Effective Security Access Check [modified]

martin_hughes28-Dec-07 9:28

martin_hughes

28-Dec-07 9:28

Hi Jeff,

I've been fiddling a bit - I haven't come up with a total solution (I am a bit hung over), but hopefully it's enough to give you a head start on the syntax etc... On with the code!

static void UserRights()
{
    DirectorySecurity ds = Directory.GetAccessControl(@"C:\test");
    WindowsIdentity user = WindowsIdentity.GetCurrent();

    bool IsInGroupWithWriteAcces = false;
    //This one gets all the groups that a user is in
    IdentityReferenceCollection irc = user.Groups;

    //Loop through all the groups the user is in...
    for (int i = 0; i < irc.Count; i++)
    {

        //Loop through all the access rules in the DirectorySecurity
        foreach (AccessRule ar in ds.GetAccessRules(true, true,
            typeof(System.Security.Principal.SecurityIdentifier)))
        {
            //Cast the AccessRule into a FileSystemAccessRule to make use of it
            FileSystemAccessRule fs = (FileSystemAccessRule)ar;

            //Now test to see if the current group has AccesControlType.Allow
            //and if the FileSystemRights are FileSystemRights.Write
            //I do a logical AND here:
            //      (fs.FileSystemRights & FileSystemRights.Write) == FileSystemRights.Write)
            //because fs.FileSystemRights returns all the
            //FileSystemRights in one go and performing the AND let's us just get
            //the Write that we're interested in.
            if ((fs.AccessControlType == AccessControlType.Allow
                && (fs.FileSystemRights & FileSystemRights.Write) == FileSystemRights.Write) &&
                fs.IdentityReference == irc[i])
            {
                Console.WriteLine("Yay, we're in a group with Write Access!");
                //Since we're in a group with Write access here, we could return true...
                //IsInGroupWithWriteAcces = true;
                //return IsInGroupWithWriteAcces;
            }
            else
            {
                //this group didn't contain write access
                Console.WriteLine("Whoops!");
            }

        }
    }
    return IsInGroupWithWriteAcces;
}

And to check if a User Account has permissions, all you need do is remove the for loop and simply test against the user.User SID.

static void UserRights2()
  {
      DirectorySecurity ds = Directory.GetAccessControl(@"C:\test");
      WindowsIdentity user = WindowsIdentity.GetCurrent();

      bool IsInGroupWithWriteAcces = false;

          //Loop through all the access rules in the DirectorySecurity
          foreach (AccessRule ar in ds.GetAccessRules(true, true,
              typeof(System.Security.Principal.SecurityIdentifier)))
          {
              //Cast the AccessRule into a FileSystemAccessRule to make use of it
              FileSystemAccessRule fs = (FileSystemAccessRule)ar;

              //Now test to see if the current group has AccesControlType.Allow
              //and if the FileSystemRights are FileSystemRights.Write
              //I do a logical AND here:
              //      (fs.FileSystemRights &amp;amp; FileSystemRights.Write) == FileSystemRights.Write)
              //because fs.FileSystemRights returns all the
              //FileSystemRights in one go and performing the AND let's us just get
              //the Write that we're interested in.
              if ((fs.AccessControlType == AccessControlType.Allow
                  && (fs.FileSystemRights & FileSystemRights.Write) == FileSystemRights.Write) &&
                  fs.IdentityReference == user.User)
              {
                  Console.WriteLine("Yay, we're a User with Write Access!");
                  //Since we're in a group with Write access here, we could return true...
                  //IsInGroupWithWriteAcces = true;
                  //return IsInGroupWithWriteAcces;
              }
              else
              {
                  //Were not a User with write access.
                  Console.WriteLine("Whoops!");
              }

          }

      //return IsInGroupWithWriteAcces;
  }

The rest should be just a matter of working out in which order things are applied/take precedence.

Cheers,

Martin

modified on Friday, December 28, 2007 4:51:42 PM

I ate too much... and another nice C# 3.0 feature

martin_hughes25-Dec-07 6:17

martin_hughes

25-Dec-07 6:17

The turkey is sitting heavily below the Christmas Pud... but I really like 3.0's auto implementing properties Smile | :)

Re: I ate too much... and another nice C# 3.0 feature

Jeffrey Walton25-Dec-07 7:39

Jeffrey Walton

25-Dec-07 7:39

martin_hughes wrote:
but I really like 3.0's auto implementing properties

3.5 was released last week. But I'm further behind - I'm still using 2.0

Re: I ate too much... and another nice C# 3.0 feature

martin_hughes25-Dec-07 7:50

martin_hughes

25-Dec-07 7:50

.Net 3.5 did... but the language is C# 3.0! Yay for confusion!

Re: I ate too much... and another nice C# 3.0 feature

Waleed Eissa25-Dec-07 17:09

Waleed Eissa

25-Dec-07 17:09

Anything interesting other than LINQ?

Waleed Eissa
.NET Software Developer in Sydney

Re: I ate too much... and another nice C# 3.0 feature

martin_hughes26-Dec-07 2:28

martin_hughes

26-Dec-07 2:28

Semi-tied in to LINQ, but extension methods are pretty sweet too!

Exercise Solution

Kefaleas Stavros24-Dec-07 23:52

Kefaleas Stavros

24-Dec-07 23:52

I have met this exercise in a book I am reading :

Develop a C# application that will determine whether any of several department-store customers has exceeded the credit limit on a charge account. For each customer, the following facts are available:

account number

balance at the beginning of the month

total of all items charged by the customer this month

total of all credits applied to the customer's account this month

allowed credit limit.

The application should input all these facts as integers, calculate the new balance (= beginning balance + charges credits), display the new balance and determine whether the new balance exceeds the customer's credit limit. For those customers whose credit limit is exceeded, the application should display the message "Credit limit exceeded". Use sentinel-controlled repetition to obtain the data for each account.

I have tried to code this solution and I came to this source code :

CustomerTest.cs :

using System;<br />
<br />
public class CustomerTest<br />
{<br />
    public static void Main(string[] args)<br />
    {<br />
        //Declarations<br />
        int account_Number;<br />
        int initial_Balance;<br />
        int total_Month_Items;<br />
        int total_Month_Credits;<br />
        int credit_Limit;<br />
        <br />
        <br />
        //create customer object<br />
        Customer myCustomer = new Customer(0, 0, 0, 0, 0);<br />
<br />
<br />
        //take input from the user<br />
        Console.Write("Enter account number or -1 to quit : ");<br />
        account_Number = Convert.ToInt32(Console.ReadLine());<br />
<br />
        //loop until sentinel value read from user<br />
        while (account_Number != -1)<br />
        {<br />
            Console.Write("Enter balance at the beggining of the month : ");<br />
            initial_Balance = Convert.ToInt32(Console.ReadLine());<br />
<br />
            Console.Write("Enter total of all items charged by the customer this month : ");<br />
            total_Month_Items = Convert.ToInt32(Console.ReadLine());<br />
<br />
            Console.Write("Enter total of all credits applied to the customer's account this month : ");<br />
            total_Month_Credits = Convert.ToInt32(Console.ReadLine());<br />
<br />
            Console.Write("Enter customer's credit limit : ");<br />
            credit_Limit = Convert.ToInt32(Console.ReadLine());<br />
<br />
            myCustomer.AccountNumber = account_Number;<br />
            myCustomer.InitialBalance = initial_Balance;<br />
            myCustomer.TotalMonthItems = total_Month_Items;<br />
            myCustomer.TotalMonthCredit = total_Month_Credits;<br />
            myCustomer.CreditLimit = credit_Limit;<br />
<br />
            //call DetermineNewBalance methd<br />
            myCustomer.DetermineNewBalance();<br />
<br />
        }<br />
    }<br />
}

Customer.cs :

using System;<br />
<br />
public class CustomerTest<br />
{<br />
    public static void Main(string[] args)<br />
    {<br />
        //Declarations<br />
        int account_Number;<br />
        int initial_Balance;<br />
        int total_Month_Items;<br />
        int total_Month_Credits;<br />
        int credit_Limit;<br />
        <br />
        <br />
        //create customer object<br />
        Customer myCustomer = new Customer(0, 0, 0, 0, 0);<br />
<br />
<br />
        //take input from the user<br />
        Console.Write("Enter account number or -1 to quit : ");<br />
        account_Number = Convert.ToInt32(Console.ReadLine());<br />
<br />
        //loop until sentinel value read from user<br />
        while (account_Number != -1)<br />
        {<br />
            Console.Write("Enter balance at the beggining of the month : ");<br />
            initial_Balance = Convert.ToInt32(Console.ReadLine());<br />
<br />
            Console.Write("Enter total of all items charged by the customer this month : ");<br />
            total_Month_Items = Convert.ToInt32(Console.ReadLine());<br />
<br />
            Console.Write("Enter total of all credits applied to the customer's account this month : ");<br />
            total_Month_Credits = Convert.ToInt32(Console.ReadLine());<br />
<br />
            Console.Write("Enter customer's credit limit : ");<br />
            credit_Limit = Convert.ToInt32(Console.ReadLine());<br />
<br />
            myCustomer.AccountNumber = account_Number;<br />
            myCustomer.InitialBalance = initial_Balance;<br />
            myCustomer.TotalMonthItems = total_Month_Items;<br />
            myCustomer.TotalMonthCredit = total_Month_Credits;<br />
            myCustomer.CreditLimit = credit_Limit;<br />
<br />
            //call DetermineNewBalance methd<br />
            myCustomer.DetermineNewBalance();<br />
<br />
        }<br />
    }<br />
}

The problem is in the first file when I use the sentinel-controlled repetition because I get no account number question at the second loop.Any ideas how to fix this one?Thnx!

Re: Exercise Solution

Luc Pattyn25-Dec-07 0:58

Luc Pattyn

25-Dec-07 0:58

A loop (for, while, ...) repeats whatever is inside, not what is in front of it. Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

Happy Holidays!

A simple paint program-C#

Ali Rahimei24-Dec-07 22:48

Ali Rahimei

24-Dec-07 22:48

Hello everybody
I ask everyone who can disign a simple paint software lookalike winXP
of course I need the source&code in C#
As soon as possible,Please
alirahimei@yahoo.com
Thank you

Re: A simple paint program-C#

Luc Pattyn25-Dec-07 1:00

Luc Pattyn

25-Dec-07 1:00

The CodeProject site holds articles about almost anything, and has search facilities.
You must use them ASAP. Now. Urgently.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

Happy Holidays!

Re: A simple paint program-C#

Paul Conrad25-Dec-07 10:33

Paul Conrad

25-Dec-07 10:33

Luc Pattyn wrote:
Urgently.

Oh my, the u-word Roll eyes | :rolleyes:

"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon

A simple paint program-C#

Ali Rahimei24-Dec-07 22:46

Ali Rahimei

24-Dec-07 22:46

Hello everybody
I ask everyone who can disign a simple paint software lookalike winXP
of course I need the source&code in C#
As soon as possible,Please

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