Convert from string ascii to string Hex

Question

Suppose I have this string

string str = \"1234\"

I need a function that convert this string to this string:

\"0x31 0x32 0x33          


        

Answer 1

This seems the job for an extension method

void Main()
{
    string test = "ABCD1234";
    string result = test.ToHex();
}

public static class StringExtensions
{
    public static string ToHex(this string input)
    {
        StringBuilder sb = new StringBuilder();
        foreach(char c in input)
            sb.AppendFormat("0x{0:X2} ", (int)c);
        return sb.ToString().Trim();
    }
}

A few tips.
Do not use string concatenation. Strings are immutable and thus every time you concatenate a string a new one is created. (Pressure on memory usage and fragmentation) A StringBuilder is generally more efficient for this case.

Strings are array of characters and using a foreach on a string already gives access to the character array

These common codes are well suited for an extension method included in a utility library always available for your projects (code reuse)