How Can I Efficiently Perform Base Conversions in .NET?

.NET high -efficiency advancement conversion

When dealing with different progressive values, advance transformation is often required. Although the built -in method supports limited transformations, the .NET lacks a general -purpose transformation mechanism.

Custom conversion function Convert.ToString

In order to realize the transformation of any advancement, it can realize its own practical function. A simple method is toely divide the numbers in the goal and accumulate the remaining numbers in the opposite order:

Performance optimization

<code class="language-csharp">public static string IntToString(int value, char[] baseChars)
{
    string result = string.Empty;
    int targetBase = baseChars.Length;

    do
    {
        result = baseChars[value % targetBase] + result;
        value = value / targetBase;
    } 
    while (value > 0);

    return result;
}</code>

For large numbers, the above method can be optimized by using an array buffer instead of the string connection:

This method is much faster for large numbers (especially those who have produced longer representations in the target base). However, for one digit, the original method may be faster.

Use custom foundation character

<code class="language-csharp">public static string IntToStringFast(int value, char[] baseChars)
{
    // 基数为2且值为int.MaxValue时的最坏情况缓冲区大小
    int i = 32;
    char[] buffer = new char[i];
    int targetBase = baseChars.Length;

    do
    {
        buffer[--i] = baseChars[value % targetBase];
        value = value / targetBase;
    }
    while (value > 0);

    return new string(buffer, i, 32 - i);
}</code>

and IntToString Allow you to specify any array of any base character. This can use custom bases, such as hexadic (base 26, use of uppercase and lowercase letters) or sixty -in -proof (base 60).

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