/// <summary>
/// 从尾部截取字符串
/// </summary>
/// <param name="sourceStr">源字符串</param>
/// <param name="length">截取长度</param>
public static string SubStringEnd(this string sourceStr, int length)
{
if (sourceStr.Length <= length)
{
return(sourceStr);
}
return(StringExtention.SubString(sourceStr, sourceStr.Length - length, length));
}
/// <summary>
/// 截取字符串 默认0开始
/// </summary>
/// <param name="sourceStr">源字符串</param>
/// <param name="length">截取长度</param>
public static string SubString(this string sourceStr, int length)
{
return(StringExtention.SubString(sourceStr, 0, length));
}