unity中有关字符串的基本操作

using UnityEngine;
using System.Collections;
//-------------------------------------------------------------
public static class StringExtensions {
    public static bool IsNullOrWhitespace(this string s){
        return s == null || s.Trim().Length == 0;//检测字符串的有效性
    }
}
//-------------------------------------------------------------
public class StringOps : MonoBehaviour 
{
    //-------------------------------------------------------------
    private string MY_String = string.Empty;//初始化字符串
    //Validate string
    public bool IsValid(string MyString)
    {
        //Check for null or white space
        if(MyString.IsNullOrWhitespace()) return false;

        //Now validate further
        return true;
    }
    //-------------------------------------------------------------
    //Compare strings
    public bool IsSame(string Str1, string Str2)
    {
        //Ignore case
        return string.Equals(Str1, Str2, System.StringComparison.CurrentCultureIgnoreCase);
    }
    //-------------------------------------------------------------
    //Sort comparision
    public int StringOrder (string Str1, string Str2)
    {
        //Ignores case
        return string.Compare(Str1, Str2, System.StringComparison.CurrentCultureIgnoreCase);
　　　　　　//不建议使用该函数。对于字符串的相等性测试可采用string.equals或者哈希表执行速度更好。
    }

    //-------------------------------------------------------------
    //Compare strings as hash
    public bool StringHashCompare(string Str1, string Str2)
    {
        int Hash1 = Animator.StringToHash(Str1);
        int Hash2 = Animator.StringToHash(Str2);

        return Hash1 == Hash2;
    }
    //-------------------------------------------------------------
    //Construct string from three numbers
    public void BuildString(int Num1, int Num2, float Num3)
    {
        string Output = string.Format("Number 1 is: {0}, Number 2 is: {1}, Number 3 is: {2}", Num1, Num2, Num3);

        Debug.Log (Output);
    }
    //-------------------------------------------------------------
    //Loops through string in foreach
    public void LoopLettersForEach(string Str)
    {
        //For each letter
        foreach(char C in Str)
        {
            //Print letter to console
            Debug.Log (C);
        }
    }
    //-------------------------------------------------------------
    //Loop through string as iterator
    public void LoopLettersEnumerator(string Str)
    {
        //Get Enumerator
        IEnumerator StrEnum = Str.GetEnumerator();

        //Move to next letter
        while(StrEnum.MoveNext())
        {
            Debug.Log ((char)StrEnum.Current);
        }
    }
    //-------------------------------------------------------------
    //Searches string for a specified word and returns found index of first occurrence
    public int SearchString(string LargerStr, string SearchStr)
    {
        //Ignore case
        return LargerStr.IndexOf(SearchStr, System.StringComparison.CurrentCultureIgnoreCase);
    }
    //-------------------------------------------------------------
}
//-------------------------------------------------------------