ASP.NET中的一些字符串操作

一些常用字符串操作的代码！大家直接看代码！！

using System;

namespace Web.StringUtil
{
    /// <summary>
    /// 字符串操作工具集
    /// </summary>
    public class StringUtil
    {                    
        public StringUtil()
        {
            //
            // TODO: 在此处添加构造函数逻辑
            //            
        }

        /// <summary>
        /// 从字符串中的尾部删除指定的字符串
        /// </summary>
        /// <param name="sourceString"></param>
        /// <param name="removedString"></param>
        /// <returns></returns>
        public static string Remove(string sourceString,string removedString)
        {
            try
            {
                if( sourceString.IndexOf(removedString) < 0 )
                {    
                    throw new Exception("原字符串中不包含移除字符串！");
                }
                string result = sourceString;
                int lengthOfSourceString = sourceString.Length;
                int lengthOfRemovedString = removedString.Length;
                int startIndex = lengthOfSourceString - lengthOfRemovedString;
                string tempSubString = sourceString.Substring(startIndex);
                if(tempSubString.ToUpper() == removedString.ToUpper())
                {                    
                    result = sourceString.Remove(startIndex,lengthOfRemovedString);
                }
                return result;
            }
            catch
            {
                return sourceString;
            }
        }

        /// <summary>
        /// 获取拆分符右边的字符串
        /// </summary>
        /// <param name="sourceString"></param>
        /// <param name="splitChar"></param>
        /// <returns></returns>
        public static string RightSplit(string sourceString, char splitChar)
        {
            string result=null;
            string[] tempString = sourceString.Split(splitChar);
            if(tempString.Length >0)
            {
                result = tempString[tempString.Length-1].ToString();
            }
            return result;
        }
        
        /// <summary>
        /// 获取拆分符左边的字符串
        /// </summary>
        /// <param name="sourceString"></param>
        /// <param name="splitChar"></param>
        /// <returns></returns>
        public static string LeftSplit(string sourceString, char splitChar)
        {
            string result=null;
            string[] tempString = sourceString.Split(splitChar);
            if(tempString.Length >0)
            {
                result = tempString[0].ToString();
            }
            return result;
        }

        /// <summary>
        /// 去掉最后一个逗号
        /// </summary>
        /// <param name="origin"></param>
        /// <returns></returns>
        public static string DelLastComma(string origin)
        {
            if(origin.IndexOf(",") == -1)
            {
                return origin;
            }
            return origin.Substring(0,origin.LastIndexOf(","));
        }

        /// <summary>
        /// 删除不可见字符
        /// </summary>
        /// <param name="sourceString"></param>
        /// <returns></returns>
        public static string DeleteUnVisibleChar(string sourceString)
        {
            System.Text.StringBuilder sBuilder = new System.Text.StringBuilder(131);
            for(int i = 0;i < sourceString.Length; i++)
            {
                int Unicode = sourceString[i];
                if(Unicode >= 16)
                {
                    sBuilder.Append(sourceString[i].ToString());
                }                
            }
            return sBuilder.ToString();
        }

        /// <summary>
        /// 获取数组元素的合并字符串
        /// </summary>
        /// <param name="stringArray"></param>
        /// <returns></returns>
        public static string GetArrayString(string[] stringArray)
        {
            string totalString = null;
            for(int i=0;i<stringArray.Length;i++)
            {
                totalString = totalString + stringArray[i];                
            }
            return totalString;
        }

        /// <summary>
        ///        获取某一字符串在字符串数组中出现的次数
        /// </summary>
        /// <param name="stringArray" type="string[]">
        ///     <para>
        ///         
        ///     </para>
        /// </param>
        /// <param name="findString" type="string">
        ///     <para>
        ///         
        ///     </para>
        /// </param>
        /// <returns>
        ///     A int value
        /// </returns>
        public static int GetStringCount(string[] stringArray,string findString)
        {
            int count = -1;                        
            string totalString = GetArrayString(stringArray);        
            string subString = totalString;

            while(subString.IndexOf(findString)>=0)
            {
                subString = totalString.Substring(subString.IndexOf(findString));
                count += 1;
            }
            return count;
        }

        /// <summary>
        ///     获取某一字符串在字符串中出现的次数
        /// </summary>
        /// <param name="stringArray" type="string">
        ///     <para>
        ///         原字符串
        ///     </para>
        /// </param>
        /// <param name="findString" type="string">
        ///     <para>
        ///         匹配字符串
        ///     </para>
        /// </param>
        /// <returns>
        ///     匹配字符串数量
        /// </returns>
        public static int GetStringCount(string sourceString,string findString)
        {
            int count = 0;    
            int findStringLength = findString.Length;
            string subString = sourceString;

            while(subString.IndexOf(findString)>=0)
            {
                subString = subString.Substring(subString.IndexOf(findString)+findStringLength);
                count += 1;
            }
            return count;
        }

        /// <summary>
        /// 截取从startString开始到原字符串结尾的所有字符   
        /// </summary>
        /// <param name="sourceString" type="string">
        ///     <para>
        ///         
        ///     </para>
        /// </param>
        /// <param name="startString" type="string">
        ///     <para>
        ///         
        ///     </para>
        /// </param>
        /// <returns>
        ///     A string value
        /// </returns>
        public static string GetSubString(string sourceString,string startString)
        {
            try
            {
                int index = sourceString.ToUpper().IndexOf(startString);
                if(index>0)
                {
                    return sourceString.Substring(index);
                }
                return sourceString;
            }
            catch
            {
                return "";
            }
        }

        public static string GetSubString(string sourceString,string beginRemovedString,string endRemovedString)
        {
            try
            {
                if(sourceString.IndexOf(beginRemovedString)!=0)
                {    
                    beginRemovedString = "";
                }

                if(sourceString.LastIndexOf(endRemovedString,sourceString.Length - endRemovedString.Length)<0)
                {
                    endRemovedString = "";
                }
                int startIndex = beginRemovedString.Length;
                int length     = sourceString.Length - beginRemovedString.Length - endRemovedString.Length ;
                if(length>0)
                {
                    return sourceString.Substring(startIndex,length);
                }
                return sourceString;
            }
            catch
            {
                return sourceString;;
            }
        }
        
        /// <summary>
        /// 按字节数取出字符串的长度
        /// </summary>
        /// <param name="strTmp">要计算的字符串</param>
        /// <returns>字符串的字节数</returns>
        public static int GetByteCount(string strTmp)
        {
            int intCharCount=0;
            for(int i=0;i<strTmp.Length;i++)
            {
                if(System.Text.UTF8Encoding.UTF8.GetByteCount(strTmp.Substring(i,1))==3)
                {
                    intCharCount=intCharCount+2;
                }
                else
                {
                    intCharCount=intCharCount+1;
                }
            }
            return intCharCount;
        }

        /// <summary>
        /// 按字节数要在字符串的位置
        /// </summary>
        /// <param name="intIns">字符串的位置</param>
        /// <param name="strTmp">要计算的字符串</param>
        /// <returns>字节的位置</returns>
        public static int GetByteIndex(int intIns,string strTmp)
        {
            int intReIns=0;
            if(strTmp.Trim()=="")
            {
                return intIns;
            }
            for(int i=0;i<strTmp.Length;i++)
            {
                if(System.Text.UTF8Encoding.UTF8.GetByteCount(strTmp.Substring(i,1))==3)
                {
                    intReIns=intReIns+2;
                }
                else
                {
                    intReIns=intReIns+1;
                }
                if(intReIns>=intIns)
                {
                    intReIns=i+1;
                    break;
                }            
            }
            return intReIns;
        }
    }
}