C# implements the method of converting to hexadecimal to C#

In C#, converting integers or other data types to hexadecimal strings can be usedToStringMethod and specify the formatted string as"X"or"x". The following are detailed implementation methods and examples:

1. Convert integers to hexadecimal strings

useToStringMethod and specify the formatted string as"X"(capital hexadecimal) or"x"(lowercase hexadecimal).

Sample code:

using System;

class Program
{
    static void Main()
    {
        int number = 29; // Decimal number        string hexUpper = ("X"); // capital hexadecimal        string hexLower = ("x"); // Lowercase hexadecimal
        (hexUpper); // Output: 1D        (hexLower); // Output: 1d    }
}

2. Specify the length of the hexadecimal string

If a fixed-length hexadecimal string is required, you can specify the length in the formatted string. For example,"X4"Indicates that a 4-bit capital hexadecimal string is generated, and the insufficient part is filled with leading zeros.

Sample code:

using System;

class Program
{
    static void Main()
    {
        int number = 29;
        string hexFixedLength = ("X4"); // 4-bit capital hexadecimal
        (hexFixedLength); // Output: 001D    }
}

3. Convert byte array to hexadecimal string

If you need to add an array of bytes (byte[]) Convert to hexadecimal string, can be usedBitConverterClass or manually implemented.

Using BitConverter:

using System;

class Program
{
    static void Main()
    {
        byte[] bytes = { 0x1D, 0x2A, 0x3F };
        string hexString = (bytes).Replace("-", "");

        (hexString); // Output: 1D2A3F    }
}

Manual implementation:

using System;
using ;

class Program
{
    static void Main()
    {
        byte[] bytes = { 0x1D, 0x2A, 0x3F };
        StringBuilder hexBuilder = new StringBuilder();

        foreach (byte b in bytes)
        {
            (("X2")); // Convert each byte to 2-bit hexadecimal        }

        string hexString = ();
        (hexString); // Output: 1D2A3F    }
}

4. Convert characters in a string to hexadecimal

If you need to convert each character in the string to its hexadecimal representation, you can use the following method:

Sample code:

using System;
using ;

class Program
{
    static void Main()
    {
        string input = "Hello";
        StringBuilder hexBuilder = new StringBuilder();

        foreach (char c in input)
        {
            (((int)c).ToString("X2") + " "); // Convert each character to 2-bit hexadecimal        }

        string hexString = ().Trim();
        (hexString); // Output: 48 65 6C 6C 6F    }
}

5. Convert hexadecimal string back to integer

If you need to convert a hexadecimal string back to an integer, you can useConvert.ToInt32ormethod.

Sample code:

using System;

class Program
{
    static void Main()
    {
        string hexString = "1D"; // Hexadecimal string        int number = Convert.ToInt32(hexString, 16); // Convert to integer
        (number); // Output: 29    }
}

6. Summary

• useToString("X")orToString("x")Convert integers to hexadecimal strings.
• useToString("X4")Generate a fixed-length hexadecimal string.
• useBitConverterOr manually implement converting a byte array into a hexadecimal string.
• useConvert.ToInt32orConvert hexadecimal string back to an integer.

With these methods, it is easy to convert between hexadecimal and other binary systems in C#.

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