String split in C# causing an object reference error

Question

I am trying to split the string tab or space. This my code:

string s = File.ReadLine();

string[] str =s.Split(new Char[] { ' ', '\t'});"

"Soccer SOCCER 11" //this is the content of variable s.

But I am getting the following error:

Object reference not set to an instance of an object

What am I doing wrong? Please help me to debug this.

what is the path `ReadLine` reads from ?(assuming `File` is a `StreamBuilder`) — Christopher H., Apr 14 '18 at 23:56
For conformation I used Streamwriter and its wring the the currect text "Soccer SOCCER 11" to other file. — Kushal, Apr 14 '18 at 23:58
`TextFiles\\Sports1.txt` doesn't seem like a valid path to me ? is it in your resource ? — Christopher H., Apr 15 '18 at 00:00
When you get the error, it should list the location where the error occurred (file, line number, class, method). Which line is giving the error? Can you split the lines up into smaller statements to determine where the error is? — Joe Sewell, Apr 15 '18 at 00:01
Possible duplicate of [What is a NullReferenceException, and how do I fix it?](https://stackoverflow.com/questions/4660142/what-is-a-nullreferenceexception-and-how-do-i-fix-it) — Camilo Terevinto, Apr 15 '18 at 00:20

score -2 · Accepted Answer · answered Apr 15 '18 at 00:02

-2

Your line of code for the split is correct, i just tried it and it works as expected.

The error must be when reading from the file, i saw your comment about writing to a file before reading, try to call the Dispose() method on the StreamWriter before trying to read from it, otherwise you can get errors like this.

answered Apr 15 '18 at 00:02

Leonardo Menezes

466
5
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string Path = ConfigurationManager.AppSettings["SportPath"]; using (System.IO.StreamReader File = new System.IO.StreamReader(Path)) { while ((File.ReadLine()) != null) { string s = File.ReadLine(); string[] str =s.Split(new Char[] {' ', '\t'}); UpdateRecords.Sport(str);} this the code I am using to read the text file. – Kushal Apr 15 '18 at 00:09
Now i get the error, you are reading two times the line, on the second read you get the error. Your code should be: string Path = ConfigurationManager.AppSettings["SportPath"]; using (System.IO.StreamReader File = new System.IO.StreamReader(Path)) { string readString = File.ReadLine(); while (readString != null) { string[] str = readString.Split(new Char[] { ' ', '\t' }); UpdateRecords.Sport(str); } } – Leonardo Menezes Apr 15 '18 at 00:16
Yes, I was reading the file twice I fixed it and its working.Thank you. – Kushal Apr 15 '18 at 00:23

String split in C# causing an object reference error

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