C# File Error

Errors Handling

Error handling when dealing with file processing is typically done using exception handling mechanisms. Here's a basic example of how you can handle errors when working with files in C#:

example.txt

The file opened & read successfully.

Program.cs

using System;
using System.IO;

class Program
{
    static void Main()
    {
        try
        {
            string filePath = "example.txt";

            // Check if the file exists before attempting to read it
            if (File.Exists(filePath))
            {
                // Read the contents of the file
                string content = File.ReadAllText(filePath);
                Console.WriteLine("File content:");
                Console.WriteLine(content);
            }
            else
            {
                Console.WriteLine("File not found: " + filePath);
            }
        }
        catch (IOException e)
        {
            // Handle file IO exceptions
            Console.WriteLine("An error occurred while reading the file:");
            Console.WriteLine(e.Message);
        }
        catch (Exception ex)
        {
            // Handle other exceptions
            Console.WriteLine("An unexpected error occurred:");
            Console.WriteLine(ex.Message);
        }
    }
}

File content:
The file opened & read successfully.

• Explanation:

1. We attempt to read the contents of a file named "example.txt".

2. We use a try block to wrap the code that may throw exceptions.

3. Inside the 'try' block, we first check if the file exists using 'File.Exists()'.

4. If the file exists, we read its contents using 'File.ReadAllText()'.

5. If any exception related to file IO occurs, it will be caught by the 'catch (IOException e)' block and appropriate error handling code will execute.

6. If any other unexpected exception occurs, it will be caught by the 'catch (Exception ex)' block.

This is a basic example, and depending on your specific requirements, you may need to add more sophisticated error handling logic. Additionally, always make sure to handle exceptions appropriately to avoid crashing your application and to provide meaningful feedback to the user.