Index out of range exception for array

Question

0.00/5 (No votes)

See more:

if (coupleSubstrings.Count > 1)
      {
          for (int i = 0; i<coupleSubstrings.Count-1; i++)
              coupleTemp[i] = coupleSubstrings[i] +" "+ coupleSubstrings[i + 1];

          dt.Clear();
          if (!ViewReqInfo(dt, coupleTemp.ToArray()))
          {
              lblErrorMessage.CurrentValue = objWord.ErrMessage;
          }
          if (dt.Rows.Count > 0)
          {
              foreach (DataRow dr in dt.Rows)
              {
                  value = dr["IsInsult"].ToString();
                  if (value == "True")
                  {
                      lblErrorMessage.CurrentValue = string.Empty;
                      lblErrorMessage.CurrentValue = "این جمله شامل کلمات غیر مجاز می باشد.";
                      break;
                  }
                  else
                  {
                      lblErrorMessage.CurrentValue = string.Empty;
                      lblErrorMessage.CurrentValue = "این جمله نیازمند بررسی بیشتر است.";
                      txtEntry.CurrentValue = string.Join(" ", coupleTemp);
                  }
              }
          }
      }
  }

What I have tried:

This method does not work the array length is longer but I dont know what is the problem

Posted 16-Feb-18 19:54pm

maysam_p82

Updated 16-Feb-18 22:07pm

Add a Solution

3 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

OriginalGriff · Answer 1 · 2018-02-16T21:15:00

Solution 1

Look at your code:

for (int i = 0; i<coupleSubstrings.Count-1; i++)
          coupleTemp[i] = coupleSubstrings[i] +" "+ coupleSubstrings[i + 1];

The loop runs i from to the last element in the array, but you then access that element plus one - which by definition does not exist.

Posted 16-Feb-18 21:15pm

OriginalGriff

Comments

phil.o 17-Feb-18 3:28am

I read it several times to be sure, array is indexed until the last but one element (i < coupleSubstrings.Count - 1).

phil.o · Answer 2 · 2018-02-16T21:31:00

The problem has to be with the coupleTemp array, since the coupleSubstrings one is properly indexed. Would you mind showing the declaration of the coupleTemp array? It appears you did not provide it with enough elements (ideally, it should have one element less than the coupleSubstrings array).

Patrice T · Answer 3 · 2018-02-16T22:07:00

Quote:
Index out of range exception for array

Along with the error message, you have also been told the position of error, would be nice to share. Since code snipset is not autonomous, it is difficult to guess what is what.

Quote:
This method does not work the array length is longer but I dont know what is the problem

Since arguing with computer that your code is right will not help, you have to find another way. This other way is to run your code with debugger, and when error occurs, inspect variables and array to understand what your code is doing and why computer reject it.

There is a tool that allow you to see what your code is doing, its name is debugger. It is also a great learning tool because it show you reality and you can see which expectation match reality.
When you don't understand what your code is doing or why it does what it does, the answer is debugger.
Use the debugger to see what your code is doing. Just set a breakpoint and see your code performing, the debugger allow you to execute lines 1 by 1 and to inspect variables as it execute.

Debugger - Wikipedia, the free encyclopedia[^]

Mastering Debugging in Visual Studio 2010 - A Beginner's Guide[^]
Basic Debugging with Visual Studio 2010 - YouTube[^]
Debugging C# Code in Visual Studio - YouTube[^]
The debugger is here to show you what your code is doing and your task is to compare with what it should do.
There is no magic in the debugger, it don't find bugs, it just help you to. When the code don't do what is expected, you are close to a bug.

Index out of range exception for array

3 solutions

Solution 1

Solution 2

Solution 3

Add your solution here

Preview 0