SCC/SCC.Common/StringHelper.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;

namespace SCC.Common
{
    /// <summary>
    /// 字符串操作 - 工具方法
    /// </summary>
    public static partial class StringHelper
    {
        #region ContainsChinese(是否包含中文)

        /// <summary>
        /// 是否包含中文
        /// </summary>
        /// <param name="text">文本</param>
        public static bool ContainsChinese(string text)
        {
            const string pattern = "[\u4e00-\u9fa5]+";
            return Regex.IsMatch(text, pattern);
        }

        #endregion

        #region ContainsNumber(是否包含数字)

        /// <summary>
        /// 是否包含数字
        /// </summary>
        /// <param name="text">文本</param>
        public static bool ContainsNumber(string text)
        {
            const string pattern = "[0-9]+";
            return Regex.IsMatch(text, pattern);
        }

        #endregion

        #region Distinct(去除重复)

        /// <summary>
        /// 去除重复
        /// </summary>
        /// <param name="value">值，范例1："5555",返回"5",范例2："4545",返回"45"</param>
        public static string Distinct(string value)
        {
            var array = value.ToCharArray();
            return new string(array.Distinct().ToArray());
        }

        #endregion
        
        #region 删除最后一个字符之后的字符
        /// <summary>
        /// 删除最后结尾的一个逗号
        /// </summary>
        public static string DelLastComma(string str)
        {
            return str.Substring(0, str.LastIndexOf(",", StringComparison.Ordinal));
        }
        /// <summary>
        /// 删除最后结尾的指定字符后的字符
        /// </summary>
        public static string DelLastChar(string str, string strchar)
        {
            return str.Substring(0, str.LastIndexOf(strchar, StringComparison.Ordinal));
        }
        /// <summary>
        /// 删除最后结尾的长度
        /// </summary>
        /// <param name="str"></param>
        /// <param name="Length"></param>
        /// <returns></returns>
        public static string DelLastLength(string str, int Length)
        {
            if (string.IsNullOrEmpty(str))
                return "";
            str = str.Substring(0, str.Length - Length);
            return str;
        }
        #endregion

        #region 快速验证一个字符串是否符合指定的正则表达式
        /// <summary>  
        /// 快速验证一个字符串是否符合指定的正则表达式。  
        /// </summary>
        /// <param name="express">正则表达式的内容。</param>  
        /// <param name="value">需验证的字符串。</param>  
        /// <returns>是否合法的bool值。</returns>  
        public static bool QuickValidate(string express, string value)
        {
            if (value == null) return false;
            Regex myRegex = new Regex(express);
            if (value.Length == 0)
            {
                return false;
            }
            return myRegex.IsMatch(value);
        }
        #endregion

    }
}