C#•7mo ago

✅ Why is a variable false in project in WPF .Net application even after it should be true?

Hi I'm currently building my first C# project and could really need some help, I'm supposed to take in a password, check if it is correct to the declared passwords in properties and then be able to change the password if the new password follows the right format. Most of the code i have done but struggling a bit now, so could really really need some help.

63 Replies

SinFluxx•7mo ago

$details

MODiX•7mo ago

When you ask a question, make sure you include as much detail as possible. Such as code, the issue you are facing, and what you expect the result to be. Upload code here https://paste.mod.gg/ (see $code for more information on how to paste your code)

olleeee•7mo ago

Oh okey! sorry im new here and also find it hard to explain the error but will upload the code!

SinFluxx•7mo ago

That's ok 🙂just people need to be able to see what you're doing to be able to help. And if you're sending code follow the guidance here $code

MODiX•7mo ago

To post C# code type the following: ```cs // code here ``` Get an example by typing $codegif in chat For longer snippets, use: https://paste.mod.gg/

olleeee•7mo ago

oh okey thank you! I have put the whole code now in the mod, but how does people find it?

olleeee•7mo ago

https://paste.mod.gg/tnkliwnraizr/0

BlazeBin - tnkliwnraizr

A tool for sharing your source code with the world!

olleeee•7mo ago

soo whats going on in my code is that im typing in a password, that password is suppose to open the door for different dormitories in Hogwarts, griffendor, hufflepuff, slytherin or ravenclaw. I have succeeded in the part to open the door when puting in the right password, but when checking if the new password is in the right format something happens. Then it says that the checkedpassword is false, which means i cant go further in the code.

SinFluxx•7mo ago

So you mean the problem is in your BtnCheckpassword_Click method?

olleeee•7mo ago

no, i think the method CheckPassWord is wrong, i put in a break point and see that even though i put return passwordChecked == true; its still false, which i dont understand

SinFluxx•7mo ago

Where is your CheckPassword method?

olleeee•7mo ago

https://paste.mod.gg/tnkliwnraizr/1

BlazeBin - tnkliwnraizr

A tool for sharing your source code with the world!

olleeee•7mo ago

sorry didnt realise when i put the class and the cs file in different windows it would change the link okej im really sorry but sort of worked that error out now....

SinFluxx•7mo ago

No sorry I hadn't spotted there was an extra tab, why are you using a for loop in there but comparing the whole string anyway? Not sure why you've got house specific fields in your Houses class either

olleeee•7mo ago

so i should take away the for loop?

SinFluxx•7mo ago

Well it's not doing anything right now Because you're just checking the full password entered against the Password property of that house

olleeee•7mo ago

ohh okej thank you.

//    public bool CheckPassWord(string passwordEntered)
   {
      
           if (passwordEntered == Password)
           {
               MessageBox.Show($"You said the right password, welcome to {HomeName}");
               return passwordChecked == true;
           }
           else if (passwordEntered == slytherinPassword)
           {
               MessageBox.Show($"You said the right password, welcome to {HomeName}");
               return passwordCheckedSlytherin == true;
           }
       if (passwordEntered != Password)
       {
           MessageBox.Show("You said the wrong password");
           return passwordChecked == false;
       }
       return false;
   }

//    public bool CheckPassWord(string passwordEntered)
   {
      
           if (passwordEntered == Password)
           {
               MessageBox.Show($"You said the right password, welcome to {HomeName}");
               return passwordChecked == true;
           }
           else if (passwordEntered == slytherinPassword)
           {
               MessageBox.Show($"You said the right password, welcome to {HomeName}");
               return passwordCheckedSlytherin == true;
           }
       if (passwordEntered != Password)
       {
           MessageBox.Show("You said the wrong password");
           return passwordChecked == false;
       }
       return false;
   }

so i have updated the method to this instead, but when running the code the message you said wrong password comes up 3 times but then still allows me to go to the next part of the program

SinFluxx•7mo ago

That'll be because you're checking the password against all 4 houses, really your CheckPassword method should just return true or false and not do anything with messages

olleeee•7mo ago

okey so you saying take away the messagebox and put that somewhere else?

SinFluxx•7mo ago

Yeah, then your CheckPassword only has one job, and you can then see what all 4 results are before deciding which message to show

olleeee•7mo ago

so where can i put the messagebox instead? in the main window? but then HomeName doesnt work

SinFluxx•7mo ago

You could still do e.g. hufflepuff.HouseName

olleeee•7mo ago

but then i have to see which password have been put in, because before the program could see that the password matched the homeName and put it there? i put the messagebox here now instead, but when doing that all the messages comes up and says that i have said the right password

 public void BtnCheckpassword_Click(object sender, RoutedEventArgs e)
 {
     string passwordEntered = Txtenteredpassword.Text;
     
    

     bool checkedpasswordgriffendor = griffendor.CheckPassWord(passwordEntered);
     bool checkedpasswordhufflepuff = hufflepuff.CheckPassWord(passwordEntered);
     bool checkedpasswordravenclaw = ravenclaw.CheckPassWord(passwordEntered);
     bool checkedpasswordslytherin = slytherin.CheckPassWord(passwordEntered);

     if (checkedpasswordgriffendor == true) 
     {
         MessageBox.Show($"You said the right password for {griffendor.HomeName}");

         BtnNewPassword.Visibility = Visibility.Visible;
         TxtnewPassword.Visibility = Visibility.Visible;
         labelhidden.Visibility = Visibility.Visible;
     
     }
     if (checkedpasswordravenclaw == true)
     { 
         MessageBox.Show($"You said the right password for {ravenclaw.HomeName}");

     BtnNewPassword.Visibility = Visibility.Visible;
         TxtnewPassword.Visibility = Visibility.Visible;
         labelhidden.Visibility = Visibility.Visible;
     }

     if (checkedpasswordhufflepuff == true)
     {
         MessageBox.Show($"You said the right password for {hufflepuff.HomeName}");

         BtnNewPassword.Visibility = Visibility.Visible;
         TxtnewPassword.Visibility = Visibility.Visible;
         labelhidden.Visibility = Visibility.Visible;

     }
     if (checkedpasswordslytherin == true)
     {
         MessageBox.Show($"You said the right password for {slytherin.HomeName}");

         BtnNewPassword.Visibility = Visibility.Visible;
         TxtnewPassword.Visibility = Visibility.Visible;
         labelhidden.Visibility = Visibility.Visible;
     }

 public void BtnCheckpassword_Click(object sender, RoutedEventArgs e)
 {
     string passwordEntered = Txtenteredpassword.Text;
     
    

     bool checkedpasswordgriffendor = griffendor.CheckPassWord(passwordEntered);
     bool checkedpasswordhufflepuff = hufflepuff.CheckPassWord(passwordEntered);
     bool checkedpasswordravenclaw = ravenclaw.CheckPassWord(passwordEntered);
     bool checkedpasswordslytherin = slytherin.CheckPassWord(passwordEntered);

     if (checkedpasswordgriffendor == true) 
     {
         MessageBox.Show($"You said the right password for {griffendor.HomeName}");

         BtnNewPassword.Visibility = Visibility.Visible;
         TxtnewPassword.Visibility = Visibility.Visible;
         labelhidden.Visibility = Visibility.Visible;
     
     }
     if (checkedpasswordravenclaw == true)
     { 
         MessageBox.Show($"You said the right password for {ravenclaw.HomeName}");

     BtnNewPassword.Visibility = Visibility.Visible;
         TxtnewPassword.Visibility = Visibility.Visible;
         labelhidden.Visibility = Visibility.Visible;
     }

     if (checkedpasswordhufflepuff == true)
     {
         MessageBox.Show($"You said the right password for {hufflepuff.HomeName}");

         BtnNewPassword.Visibility = Visibility.Visible;
         TxtnewPassword.Visibility = Visibility.Visible;
         labelhidden.Visibility = Visibility.Visible;

     }
     if (checkedpasswordslytherin == true)
     {
         MessageBox.Show($"You said the right password for {slytherin.HomeName}");

         BtnNewPassword.Visibility = Visibility.Visible;
         TxtnewPassword.Visibility = Visibility.Visible;
         labelhidden.Visibility = Visibility.Visible;
     }

SinFluxx•7mo ago

What does your updated CheckPassword method look like?

olleeee•7mo ago

 public bool CheckPassWord(string passwordEntered)
 {
         if (passwordEntered == Password)
         {
             return passwordChecked == true;
         }
         else if (passwordEntered == slytherinPassword)
         {
             return passwordCheckedSlytherin == true;
         }
          else if (passwordEntered != Password)
          {
         return passwordChecked == false;
          }
    return false;
 }

 public bool CheckPassWord(string passwordEntered)
 {
         if (passwordEntered == Password)
         {
             return passwordChecked == true;
         }
         else if (passwordEntered == slytherinPassword)
         {
             return passwordCheckedSlytherin == true;
         }
          else if (passwordEntered != Password)
          {
         return passwordChecked == false;
          }
    return false;
 }

SinFluxx•7mo ago

Why is it checking a slytherinPassword on all the houses?

olleeee•7mo ago

so the assigment say that slytherin house have different criterias when choosing a new password, therefor i wanted to be sure if it was a slytherin password or not and use the passwordchecked slytherin further down in the code

SinFluxx•7mo ago

But your other houses shouldn't know what Slytherin's password is

olleeee•7mo ago

no so now i took the slytherin part away, but something weird then happens!

   public bool CheckPassWord(string passwordEntered)
   {
           if (passwordEntered == Password)
           {
               return passwordChecked == true;
           }
            else if (passwordEntered != Password)
            {
           return passwordChecked == false;
            }
      return false;
   }

   public bool CheckPassWord(string passwordEntered)
   {
           if (passwordEntered == Password)
           {
               return passwordChecked == true;
           }
            else if (passwordEntered != Password)
            {
           return passwordChecked == false;
            }
      return false;
   }

the ravenclaw password opens the griffendor door

SinFluxx•7mo ago

Ok so, this won't fix the issue but may make it easier to read, you BtnCheckpassword_Click method can be shortened:

public void BtnCheckpassword_Click(object sender, RoutedEventArgs e)
{
  string passwordEntered = Txtenteredpassword.Text;
  bool passwordMatches = false;
  string houseName = "";

  if (griffendor.CheckPassWord(passwordEntered))
  {
    passwordMatches = true;
    houseName = griffendor.HouseName;
  }

  if (hufflepuff.CheckPassWord(passwordEntered))
  {
    passwordMatches = true;
    houseName = hufflepuff.HouseName;
  }

  if (ravenclaw.CheckPassWord(passwordEntered))
  {
    passwordMatches = true;
    houseName = ravenclaw.HouseName;
  }

  if (slytherin.CheckPassWord(passwordEntered))
  {
    passwordMatches = true;
    houseName = slytherin.HouseName;
  }


  if (passwordMatches)
  {
    MessageBox.Show($"You said the right password for {houseName}");
    BtnNewPassword.Visibility = Visibility.Visible;
    TxtnewPassword.Visibility = Visibility.Visible;
    labelhidden.Visibility = Visibility.Visible;
  }
}

public void BtnCheckpassword_Click(object sender, RoutedEventArgs e)
{
  string passwordEntered = Txtenteredpassword.Text;
  bool passwordMatches = false;
  string houseName = "";

  if (griffendor.CheckPassWord(passwordEntered))
  {
    passwordMatches = true;
    houseName = griffendor.HouseName;
  }

  if (hufflepuff.CheckPassWord(passwordEntered))
  {
    passwordMatches = true;
    houseName = hufflepuff.HouseName;
  }

  if (ravenclaw.CheckPassWord(passwordEntered))
  {
    passwordMatches = true;
    houseName = ravenclaw.HouseName;
  }

  if (slytherin.CheckPassWord(passwordEntered))
  {
    passwordMatches = true;
    houseName = slytherin.HouseName;
  }


  if (passwordMatches)
  {
    MessageBox.Show($"You said the right password for {houseName}");
    BtnNewPassword.Visibility = Visibility.Visible;
    TxtnewPassword.Visibility = Visibility.Visible;
    labelhidden.Visibility = Visibility.Visible;
  }
}

Where's the code where the door gets opened?

olleeee•7mo ago

well i guess it is the checkpassword part now all of the password says that its a slytherin password thats been entered.

    public bool CheckPassWord(string passwordEntered)
    {
        if (passwordEntered == Password)
        {
            return passwordChecked == true;
        }
        else if (passwordEntered != Password)
        {
            return passwordChecked == false;
        }
        return false;
    
    }

    public bool CheckPassWord(string passwordEntered)
    {
        if (passwordEntered == Password)
        {
            return passwordChecked == true;
        }
        else if (passwordEntered != Password)
        {
            return passwordChecked == false;
        }
        return false;
    
    }

SinFluxx•7mo ago

Can you upload all your code again please?

olleeee•7mo ago

of course!

olleeee•7mo ago

https://paste.mod.gg/zdejdsuaktar/1

BlazeBin - zdejdsuaktar

A tool for sharing your source code with the world!

olleeee•7mo ago

https://paste.mod.gg/zdejdsuaktar/0

BlazeBin - zdejdsuaktar

A tool for sharing your source code with the world!

olleeee•7mo ago

okej i got that sorted actually, just added the == true after griffendor.CheckPassWord(passwordEntered)

        public void BtnCheckpassword_Click(object sender, RoutedEventArgs e)
        {
            string passwordEntered = Txtenteredpassword.Text;
            bool passwordMatches = false;
            string houseName = "";

            if (griffendor.CheckPassWord(passwordEntered) == true) 
            {
               passwordMatches = true;
               houseName = griffendor.HomeName;
            }

        public void BtnCheckpassword_Click(object sender, RoutedEventArgs e)
        {
            string passwordEntered = Txtenteredpassword.Text;
            bool passwordMatches = false;
            string houseName = "";

            if (griffendor.CheckPassWord(passwordEntered) == true) 
            {
               passwordMatches = true;
               houseName = griffendor.HomeName;
            }

but now the changing of password doesnt work, could you please help me with that? really appreciate the help i have already got!

SinFluxx•7mo ago

that shouldn't have changed anything if (somethingThatReturnsBool()) is the same as: if (somethingThatReturnsBool() == true)

olleeee•7mo ago

i didnt change anything else so dont know what happended then

olleeee•7mo ago

https://paste.mod.gg/avcoftwpimrz/1

BlazeBin - avcoftwpimrz

A tool for sharing your source code with the world!

SinFluxx•7mo ago

yeah I'm a bit confused because if I run it my end, without your latest change, it shows me the message for the correct house

olleeee•7mo ago

hmmm okej thats very weird okey that works for me as well now

SinFluxx•7mo ago

What problems were you having with changing the password?

olleeee•7mo ago

its the last part i think, and it is when im changing the slythering password. So i created a method only for the change of the slytherin password, and trying now to change it.

      public bool RightFormatPasswordSlytherin(string passwords)
      {
          char[] konsonanter = { 'b', 'c', 'd', 's', 'z', 'x', 'q', 'w', 'r', 'f', 't', 'g', 'v', 'h', 'j', 'n', 'm', 'k', 'l', 'p' };
          if (passwords.Length > 8)
          {
              char firstchar = char.ToLower(passwords[0]);
              char lastchar = char.ToLower(passwords[passwords.Length - 1]);

              foreach (char konsonant in konsonanter)
              {
                  if (firstchar == konsonant && lastchar == konsonant)
                  {    
                      return true;
                  
                  }
              }
          } 
          return false;
      }

      public bool RightFormatPasswordSlytherin(string passwords)
      {
          char[] konsonanter = { 'b', 'c', 'd', 's', 'z', 'x', 'q', 'w', 'r', 'f', 't', 'g', 'v', 'h', 'j', 'n', 'm', 'k', 'l', 'p' };
          if (passwords.Length > 8)
          {
              char firstchar = char.ToLower(passwords[0]);
              char lastchar = char.ToLower(passwords[passwords.Length - 1]);

              foreach (char konsonant in konsonanter)
              {
                  if (firstchar == konsonant && lastchar == konsonant)
                  {    
                      return true;
                  
                  }
              }
          } 
          return false;
      }

but when running the code it says the firstchar is not == konsonant and instead of the new password, the old password comes up.

SinFluxx•7mo ago

So for the Slytherin password the first and last character have to be the same?

olleeee•7mo ago

it have to be a consonant one of the consonants in the array

SinFluxx•7mo ago

if (firstchar == konsonant && lastchar == konsonant) This check you're doing means that it will only return true if the first and last letters are the same consonant

olleeee•7mo ago

ohh okey, so no wonder should i do a for loop instead and go through all the consonants?

SinFluxx•7mo ago

Are you allowed to use Linq?

olleeee•7mo ago

no its suppose to be fully your own methods

SinFluxx•7mo ago

thought that would be the case 🙂

olleeee•7mo ago

i dont really understand because the first method works,

 public bool RightFormatPassword(string passwords)
 {
     char[] vokaler = { 'a', 'e', 'i', 'o', 'u', 'y', 'å', 'ä', 'ö' };
     char[] konsonanter = { 'b', 'c', 'd', 's', 'z', 'x', 'q', 'w', 'r', 'f', 't', 'g', 'v', 'h', 'j', 'n', 'm', 'k', 'l', 'p' };
     if (passwords.Length > 5)
     {
         char firstchar = char.ToLower(passwords[0]);
         char lastchar = char.ToLower(passwords[passwords.Length - 1]);
         foreach (char vokal in vokaler)
         {
             if (firstchar == vokal)
             {

                 foreach (char konsonant in konsonanter)
                 {
                     if (lastchar == konsonant)
                     {
                         return true;
                     }
                 }
             } 
         }
     } return false;

 }

 public bool RightFormatPassword(string passwords)
 {
     char[] vokaler = { 'a', 'e', 'i', 'o', 'u', 'y', 'å', 'ä', 'ö' };
     char[] konsonanter = { 'b', 'c', 'd', 's', 'z', 'x', 'q', 'w', 'r', 'f', 't', 'g', 'v', 'h', 'j', 'n', 'm', 'k', 'l', 'p' };
     if (passwords.Length > 5)
     {
         char firstchar = char.ToLower(passwords[0]);
         char lastchar = char.ToLower(passwords[passwords.Length - 1]);
         foreach (char vokal in vokaler)
         {
             if (firstchar == vokal)
             {

                 foreach (char konsonant in konsonanter)
                 {
                     if (lastchar == konsonant)
                     {
                         return true;
                     }
                 }
             } 
         }
     } return false;

 }

yeah unfortunately

SinFluxx•7mo ago

that's because there you're checking the two characters separately you can still do one loop and do something like:

bool firstCharIsKonsonant = false;
bool lastCharIsKonsonant = false;

foreach (char konsonant in konsonanter)
{
  if (firstchar == konsonant)
    firstCharIsKonsonant = true;

  if (lastChar == konsonant)
    lastCharIsConsonant = true;
}

return firstCharIsKonsonant && lastCharIsKonsonant; // this will return true only if both are true

bool firstCharIsKonsonant = false;
bool lastCharIsKonsonant = false;

foreach (char konsonant in konsonanter)
{
  if (firstchar == konsonant)
    firstCharIsKonsonant = true;

  if (lastChar == konsonant)
    lastCharIsConsonant = true;
}

return firstCharIsKonsonant && lastCharIsKonsonant; // this will return true only if both are true

olleeee•7mo ago

so when i do that i get the error that operator == cant be used on char and char{} **char[]

SinFluxx•7mo ago

Show your code?

olleeee•7mo ago

        public bool RightFormatPasswordSlytherin(string passwords)
        {
            bool firstCharisKonsonant = false;
            bool lastcharisKonsonant = false;
            char[] konsonanter = { 'b', 'c', 'd', 's', 'z', 'x', 'q', 'w', 'r', 'f', 't', 'g', 'v', 'h', 'j', 'n', 'm', 'k', 'l', 'p' };
            if (passwords.Length > 8)
            {
                char firstchar = char.ToLower(passwords[0]);
                char lastchar = char.ToLower(passwords[passwords.Length - 1]);

                foreach(char konsonant in konsonanter)
                {
                    if (firstchar == konsonanter)
                    { firstCharisKonsonant == true; }


                    if (lastchar == konsonanter)
                    { lastcharisKonsonant == true; }
                              
                }
            } return lastcharisKonsonant && firstCharisKonsonant; 
           
        }

        public bool RightFormatPasswordSlytherin(string passwords)
        {
            bool firstCharisKonsonant = false;
            bool lastcharisKonsonant = false;
            char[] konsonanter = { 'b', 'c', 'd', 's', 'z', 'x', 'q', 'w', 'r', 'f', 't', 'g', 'v', 'h', 'j', 'n', 'm', 'k', 'l', 'p' };
            if (passwords.Length > 8)
            {
                char firstchar = char.ToLower(passwords[0]);
                char lastchar = char.ToLower(passwords[passwords.Length - 1]);

                foreach(char konsonant in konsonanter)
                {
                    if (firstchar == konsonanter)
                    { firstCharisKonsonant == true; }


                    if (lastchar == konsonanter)
                    { lastcharisKonsonant == true; }
                              
                }
            } return lastcharisKonsonant && firstCharisKonsonant; 
           
        }

SinFluxx•7mo ago

if (firstchar == konsonanter) if (lastchar == konsonanter) you mistyped konsonanter instead of konsonant

if (firstchar == konsonanter)
  { firstCharisKonsonant == true; }

if (firstchar == konsonanter)
  { firstCharisKonsonant == true; }

When you have something like an if statement and it only has one line inside, you don't need to have {} (but it doesn't matter either way)

olleeee•7mo ago

ohhh nooo 😆 silly little erros

SinFluxx•7mo ago

also inside your if statements you've put ==, but it should just be = 🙂 everyone makes them!

olleeee•7mo ago

ahhh i cant thank you enough for all of the help!!

SinFluxx•7mo ago

I mean that for here: firstCharisKonsonant == true; lastcharisKonsonant == true; to be clear!

olleeee•7mo ago

yes! changed and now the whole program workS!!!

Ikarmus•7mo ago

consider $close

MODiX•7mo ago

Use the /close command to mark a forum thread as answered

Gaming

Programming

✅ Why is a variable false in project in WPF .Net application even after it should be true?