c#用Regex獲得指定開始和結束字串中間的一段文本

 

    /// <summary>
/// 獲得字串中開始和結束字串中間得值
/// </summary>
/// <param name="str">字串</param>
/// <param name="s">開始</param>
/// <param name="e">結束</param>
/// <returns></returns> 
    public static string GetValue(string str, string s, string e)
    {
        Regex rg = new Regex("(?<=(" + s + "))[.\\s\\S]*?(?=(" + e + "))", RegexOptions.Multiline | RegexOptions.Singleline);
return rg.Match(str).Value;
    }

 

 

 

 

 /// <summary>
/// 截取字串過多+……
/// </summary>
/// <param name="inputString">字串</param>
/// <param name="len">長度</param>
/// <returns>string</returns>
    public static string CutString(string inputString, int len)
    {
        ASCIIEncoding ascii = new ASCIIEncoding();
int tempLen = 0;
string tempString = "";
byte[] s = ascii.GetBytes(inputString);
for (int i = 0; i < s.Length; i++)
        {
if ((int)s[i] == 63)
            {
                tempLen += 2;
            }
else
            {
                tempLen += 1;
            }

try
            {
                tempString += inputString.Substring(i, 1);
            }
catch
            {
break;
            }

if (tempLen > len)
break;
        }
//如果截過則加上半個省略符號
        byte[] mybyte = System.Text.Encoding.Default.GetBytes(inputString);
if (mybyte.Length > len)
            tempString += "…";

return tempString;
    }

 

 

 

string get字串="01-藍";
string get後 = get字串.Substring(0, get字串.IndexOf("-"));
這樣擷取的資料是:藍
string get後 = get字串.Substring(get字串.IndexOf("-"),get字串.Length - get字串.IndexOf("-")); 
 
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