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Error: returns void, a return keyword must not be followed by an object expression

Returns void, a return keyword must not be followed by an object expression C#How to use effective caching in .NET?async/await - when to return a Task vs void?I want to create 5 random numbers between 2 numbers and display in my textboxSince 'method' returns void, a return keyword must not be followed by an object expressionVisual C# Programming a Login form connected to a Access Db that gives only tries to log intoC# method failing to function for no known reasonreturn keyword must not be followed by an object expressionerror return keyword must not be followed by an object expressionReturns void, a return keyword must not be followed by an object expression C#Explicit explanation as to what a return type is, why void is necessary

.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;

1

 private void QuestionAnswer_Load(object sender, EventArgs e)
 

 txtQuestion.Enabled = false;
 txtQuestion.BackColor = Color.White;
 grpMultipleChoice.Enabled = false;
 grpSingleChoice.Enabled = false;

 btnCheckAnswer.Enabled = false;
 btnNext.Enabled = false;
 btnQuit.Enabled = false;

 //force student to enter registration details
 if (txtStudentName.Text == "" && txtStudentNumber.Text == "" && txtModuleNumber.Text == "")
 
 btnStart.Enabled = false;
 MessageBox.Show("You must enter your registration details at the upper right corner");
 

 //declare a list
 lstNumbers = new ArrayList();

 //create a random number generator
 Random rndNumber = new Random();

 //generate 70 random numbers
 //int number = (int)(rndNumber.NextDouble() * 69) + 1;

 //lstNumbers.Add(number);
 ///use this counter to loop whenever a number is generated
 int count = 0;
 int maximumNumber = 69;

 ///disable answer button 
 btnCheckAnswer.Enabled = false;
 do
 

 int number = (int)(rndNumber.NextDouble() * maximumNumber) + 1;
 lstNumbers.Add(number);
 if (!lstNumbers.Contains(number))
 
 lstNumbers.Add(number);
 
 count++;

 while (count <= 15 * 70);//
 btnCheckAnswer_Click(sender, e);
 return lstNumbers;//returns once list is built
 

Explanation:
I have created an arraylist that allows me generate randomly between 1-70 but noticed
my numbers where somewhat repeating. In a bid to prevent this, i noticed i was getting an
error message below:

Error 1 Since 'wwTestAppV1.GenKnow.QuestionAnswer_Load(object, System.EventArgs)' returns void, a return keyword must not be followed by an object expression

i have tried everything i can to resolve this.the program runs well when i remove this
statement but shows duplicate values. Could you please help?

c# return

share|improve this question

edited Oct 11 '12 at 15:58

Kache

6,19199 gold badges3636 silver badges6363 bronze badges

asked Oct 11 '12 at 15:44

ZaynZayn

1111 gold badge11 silver badge33 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  you mean: return lstNumbers? i have tried that before stll show the squiggle on return.
  
  – Zayn
  Oct 11 '12 at 15:55
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Unless you are programming in Visual Studio 2003 and C# 1, you should not be using an ArrayList. Use List<T> from System.Collections.Generic
  
  – Anthony Pegram
  Oct 11 '12 at 15:57
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I would like to add that private void QuestionAnswer_Load(object sender, EventArgs e) is the method under which it falls. I have even tried changing void to string so i could return with a To String() but it still doesn't work
  
  – Zayn
  Oct 11 '12 at 16:02
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Its on Visual studio 2012 @ Anthony
  
  – Zayn
  Oct 11 '12 at 16:04
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  It's been stated already that by using 'void' you are in essence saying that your function will return nothing. You need to specify the exact type of the object you intend to return. (Sorry my previous comment was c++ ... so I deleted it).
  
  – user922475
  Oct 11 '12 at 16:06
  
  

  
  
  
  

add a comment | 

1

 private void QuestionAnswer_Load(object sender, EventArgs e)
 

 txtQuestion.Enabled = false;
 txtQuestion.BackColor = Color.White;
 grpMultipleChoice.Enabled = false;
 grpSingleChoice.Enabled = false;

 btnCheckAnswer.Enabled = false;
 btnNext.Enabled = false;
 btnQuit.Enabled = false;

 //force student to enter registration details
 if (txtStudentName.Text == "" && txtStudentNumber.Text == "" && txtModuleNumber.Text == "")
 
 btnStart.Enabled = false;
 MessageBox.Show("You must enter your registration details at the upper right corner");
 

 //declare a list
 lstNumbers = new ArrayList();

 //create a random number generator
 Random rndNumber = new Random();

 //generate 70 random numbers
 //int number = (int)(rndNumber.NextDouble() * 69) + 1;

 //lstNumbers.Add(number);
 ///use this counter to loop whenever a number is generated
 int count = 0;
 int maximumNumber = 69;

 ///disable answer button 
 btnCheckAnswer.Enabled = false;
 do
 

 int number = (int)(rndNumber.NextDouble() * maximumNumber) + 1;
 lstNumbers.Add(number);
 if (!lstNumbers.Contains(number))
 
 lstNumbers.Add(number);
 
 count++;

 while (count <= 15 * 70);//
 btnCheckAnswer_Click(sender, e);
 return lstNumbers;//returns once list is built
 

Explanation:
I have created an arraylist that allows me generate randomly between 1-70 but noticed
my numbers where somewhat repeating. In a bid to prevent this, i noticed i was getting an
error message below:

Error 1 Since 'wwTestAppV1.GenKnow.QuestionAnswer_Load(object, System.EventArgs)' returns void, a return keyword must not be followed by an object expression

i have tried everything i can to resolve this.the program runs well when i remove this
statement but shows duplicate values. Could you please help?

c# return

share|improve this question

edited Oct 11 '12 at 15:58

Kache

6,19199 gold badges3636 silver badges6363 bronze badges

asked Oct 11 '12 at 15:44

ZaynZayn

1111 gold badge11 silver badge33 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  you mean: return lstNumbers? i have tried that before stll show the squiggle on return.
  
  – Zayn
  Oct 11 '12 at 15:55
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Unless you are programming in Visual Studio 2003 and C# 1, you should not be using an ArrayList. Use List<T> from System.Collections.Generic
  
  – Anthony Pegram
  Oct 11 '12 at 15:57
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I would like to add that private void QuestionAnswer_Load(object sender, EventArgs e) is the method under which it falls. I have even tried changing void to string so i could return with a To String() but it still doesn't work
  
  – Zayn
  Oct 11 '12 at 16:02
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Its on Visual studio 2012 @ Anthony
  
  – Zayn
  Oct 11 '12 at 16:04
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  It's been stated already that by using 'void' you are in essence saying that your function will return nothing. You need to specify the exact type of the object you intend to return. (Sorry my previous comment was c++ ... so I deleted it).
  
  – user922475
  Oct 11 '12 at 16:06
  
  

  
  
  
  

add a comment | 

 private void QuestionAnswer_Load(object sender, EventArgs e)
 

 txtQuestion.Enabled = false;
 txtQuestion.BackColor = Color.White;
 grpMultipleChoice.Enabled = false;
 grpSingleChoice.Enabled = false;

 btnCheckAnswer.Enabled = false;
 btnNext.Enabled = false;
 btnQuit.Enabled = false;

 //force student to enter registration details
 if (txtStudentName.Text == "" && txtStudentNumber.Text == "" && txtModuleNumber.Text == "")
 
 btnStart.Enabled = false;
 MessageBox.Show("You must enter your registration details at the upper right corner");
 

 //declare a list
 lstNumbers = new ArrayList();

 //create a random number generator
 Random rndNumber = new Random();

 //generate 70 random numbers
 //int number = (int)(rndNumber.NextDouble() * 69) + 1;

 //lstNumbers.Add(number);
 ///use this counter to loop whenever a number is generated
 int count = 0;
 int maximumNumber = 69;

 ///disable answer button 
 btnCheckAnswer.Enabled = false;
 do
 

 int number = (int)(rndNumber.NextDouble() * maximumNumber) + 1;
 lstNumbers.Add(number);
 if (!lstNumbers.Contains(number))
 
 lstNumbers.Add(number);
 
 count++;

 while (count <= 15 * 70);//
 btnCheckAnswer_Click(sender, e);
 return lstNumbers;//returns once list is built
 

Explanation:
I have created an arraylist that allows me generate randomly between 1-70 but noticed
my numbers where somewhat repeating. In a bid to prevent this, i noticed i was getting an
error message below:

Error 1 Since 'wwTestAppV1.GenKnow.QuestionAnswer_Load(object, System.EventArgs)' returns void, a return keyword must not be followed by an object expression

i have tried everything i can to resolve this.the program runs well when i remove this
statement but shows duplicate values. Could you please help?

c# return

share|improve this question

edited Oct 11 '12 at 15:58

Kache

6,19199 gold badges3636 silver badges6363 bronze badges

asked Oct 11 '12 at 15:44

ZaynZayn

1111 gold badge11 silver badge33 bronze badges

 private void QuestionAnswer_Load(object sender, EventArgs e)
 

 txtQuestion.Enabled = false;
 txtQuestion.BackColor = Color.White;
 grpMultipleChoice.Enabled = false;
 grpSingleChoice.Enabled = false;

 btnCheckAnswer.Enabled = false;
 btnNext.Enabled = false;
 btnQuit.Enabled = false;

 //force student to enter registration details
 if (txtStudentName.Text == "" && txtStudentNumber.Text == "" && txtModuleNumber.Text == "")
 
 btnStart.Enabled = false;
 MessageBox.Show("You must enter your registration details at the upper right corner");
 

 //declare a list
 lstNumbers = new ArrayList();

 //create a random number generator
 Random rndNumber = new Random();

 //generate 70 random numbers
 //int number = (int)(rndNumber.NextDouble() * 69) + 1;

 //lstNumbers.Add(number);
 ///use this counter to loop whenever a number is generated
 int count = 0;
 int maximumNumber = 69;

 ///disable answer button 
 btnCheckAnswer.Enabled = false;
 do
 

 int number = (int)(rndNumber.NextDouble() * maximumNumber) + 1;
 lstNumbers.Add(number);
 if (!lstNumbers.Contains(number))
 
 lstNumbers.Add(number);
 
 count++;

 while (count <= 15 * 70);//
 btnCheckAnswer_Click(sender, e);
 return lstNumbers;//returns once list is built
 

share|improve this question

edited Oct 11 '12 at 15:58

Kache

6,19199 gold badges3636 silver badges6363 bronze badges

asked Oct 11 '12 at 15:44

ZaynZayn

1111 gold badge11 silver badge33 bronze badges

share|improve this question

edited Oct 11 '12 at 15:58

Kache

6,19199 gold badges3636 silver badges6363 bronze badges

asked Oct 11 '12 at 15:44

ZaynZayn

1111 gold badge11 silver badge33 bronze badges

edited Oct 11 '12 at 15:58

Kache

6,19199 gold badges3636 silver badges6363 bronze badges

edited Oct 11 '12 at 15:58

Kache

6,19199 gold badges3636 silver badges6363 bronze badges

asked Oct 11 '12 at 15:44

ZaynZayn

1111 gold badge11 silver badge33 bronze badges

asked Oct 11 '12 at 15:44

ZaynZayn

1111 gold badge11 silver badge33 bronze badges

1 Answer
1

active

oldest

votes

8

Your method signature is:

private void QuestionAnswer_Load(object sender, EventArgs e)

The return type void means you can't/aren't planning to return anything. However, at the bottom, you have:

return lstNumbers;//returns once list is built

You're returning something! The compiler is complaining that you told it conflicting instructions. Either change the return type to ArrayList or do not return anything.

That being said, there are several improvements that could be made to the code to make it more readable, which will help you decipher problems, too. Consider submitting your code to https://codereview.stackexchange.com/.

share|improve this answer

edited Apr 13 '17 at 12:40

Community♦

111 silver badge

answered Oct 11 '12 at 15:54

KacheKache

6,19199 gold badges3636 silver badges6363 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Right. So change private void to private yourobject or private T if you want to keep the object returned undefined.
  
  – user922475
  Oct 11 '12 at 15:58
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  He sounds like he's very new to programming. I wouldn't suggest that he start writing generic methods just yet.
  
  – Kache
  Oct 11 '12 at 15:59
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  when i change method to private string QuestionAnswer_load(...., iget error..Error 1 'string wwTestAppV1.GenKnow.QuestionAnswer_Load(object, System.EventArgs)' has the wrong return type
  
  – Zayn
  Oct 11 '12 at 16:19
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @annoying_squid; my object is lstNumbers right? its suppose to represent the list
  
  – Zayn
  Oct 11 '12 at 16:21
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  1stNumbers is an instance of your type ArrayList. Try private ArrayList QuestionAnswer_Load .. instead. You specify the type not the name of the instance. The compiler won't understand specific names.
  
  – user922475
  Oct 11 '12 at 16:30
  

  
  
  
  

 | 
show 2 more comments

Your Answer

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8

Your method signature is:

private void QuestionAnswer_Load(object sender, EventArgs e)

The return type void means you can't/aren't planning to return anything. However, at the bottom, you have:

return lstNumbers;//returns once list is built

You're returning something! The compiler is complaining that you told it conflicting instructions. Either change the return type to ArrayList or do not return anything.

That being said, there are several improvements that could be made to the code to make it more readable, which will help you decipher problems, too. Consider submitting your code to https://codereview.stackexchange.com/.

share|improve this answer

edited Apr 13 '17 at 12:40

Community♦

111 silver badge

answered Oct 11 '12 at 15:54

KacheKache

6,19199 gold badges3636 silver badges6363 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Right. So change private void to private yourobject or private T if you want to keep the object returned undefined.
  
  – user922475
  Oct 11 '12 at 15:58
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  He sounds like he's very new to programming. I wouldn't suggest that he start writing generic methods just yet.
  
  – Kache
  Oct 11 '12 at 15:59
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  when i change method to private string QuestionAnswer_load(...., iget error..Error 1 'string wwTestAppV1.GenKnow.QuestionAnswer_Load(object, System.EventArgs)' has the wrong return type
  
  – Zayn
  Oct 11 '12 at 16:19
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @annoying_squid; my object is lstNumbers right? its suppose to represent the list
  
  – Zayn
  Oct 11 '12 at 16:21
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  1stNumbers is an instance of your type ArrayList. Try private ArrayList QuestionAnswer_Load .. instead. You specify the type not the name of the instance. The compiler won't understand specific names.
  
  – user922475
  Oct 11 '12 at 16:30
  

  
  
  
  

 | 
show 2 more comments

8

Your method signature is:

private void QuestionAnswer_Load(object sender, EventArgs e)

The return type void means you can't/aren't planning to return anything. However, at the bottom, you have:

return lstNumbers;//returns once list is built

You're returning something! The compiler is complaining that you told it conflicting instructions. Either change the return type to ArrayList or do not return anything.

That being said, there are several improvements that could be made to the code to make it more readable, which will help you decipher problems, too. Consider submitting your code to https://codereview.stackexchange.com/.

share|improve this answer

edited Apr 13 '17 at 12:40

Community♦

111 silver badge

answered Oct 11 '12 at 15:54

KacheKache

6,19199 gold badges3636 silver badges6363 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Right. So change private void to private yourobject or private T if you want to keep the object returned undefined.
  
  – user922475
  Oct 11 '12 at 15:58
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  He sounds like he's very new to programming. I wouldn't suggest that he start writing generic methods just yet.
  
  – Kache
  Oct 11 '12 at 15:59
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  when i change method to private string QuestionAnswer_load(...., iget error..Error 1 'string wwTestAppV1.GenKnow.QuestionAnswer_Load(object, System.EventArgs)' has the wrong return type
  
  – Zayn
  Oct 11 '12 at 16:19
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @annoying_squid; my object is lstNumbers right? its suppose to represent the list
  
  – Zayn
  Oct 11 '12 at 16:21
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  1stNumbers is an instance of your type ArrayList. Try private ArrayList QuestionAnswer_Load .. instead. You specify the type not the name of the instance. The compiler won't understand specific names.
  
  – user922475
  Oct 11 '12 at 16:30
  

  
  
  
  

 | 
show 2 more comments

Your method signature is:

private void QuestionAnswer_Load(object sender, EventArgs e)

The return type void means you can't/aren't planning to return anything. However, at the bottom, you have:

return lstNumbers;//returns once list is built

You're returning something! The compiler is complaining that you told it conflicting instructions. Either change the return type to ArrayList or do not return anything.

That being said, there are several improvements that could be made to the code to make it more readable, which will help you decipher problems, too. Consider submitting your code to https://codereview.stackexchange.com/.

share|improve this answer

edited Apr 13 '17 at 12:40

Community♦

111 silver badge

answered Oct 11 '12 at 15:54

KacheKache

6,19199 gold badges3636 silver badges6363 bronze badges

private void QuestionAnswer_Load(object sender, EventArgs e)

return lstNumbers;//returns once list is built

share|improve this answer

edited Apr 13 '17 at 12:40

Community♦

111 silver badge

answered Oct 11 '12 at 15:54

KacheKache

6,19199 gold badges3636 silver badges6363 bronze badges

edited Apr 13 '17 at 12:40

Community♦

111 silver badge

edited Apr 13 '17 at 12:40

Community♦

111 silver badge

answered Oct 11 '12 at 15:54

KacheKache

6,19199 gold badges3636 silver badges6363 bronze badges

answered Oct 11 '12 at 15:54

KacheKache

6,19199 gold badges3636 silver badges6363 bronze badges