C#截取指定长度中英文字符串方法

用C#写的字符串截取函数

public string CutStr(string sInString,int iCutLength){
    if(sInString==null || sInString.Length==0 || iCutLength<=0) return "";
    int iCount=System.Text.Encoding.GetEncoding("Shift_JIS").GetByteCount(sInString);
    if(iCount>iCutLength){
        int iLength=0;
        for(int i=0;i<sInString.Length;i++){
            int iCharLength=System.Text.Encoding.GetEncoding("Shift_JIS").GetByteCount(new char[]{sInString[i]});
            iLength += iCharLength;
            if(iLength==iCutLength){
                sInString=sInString.Substring(0,i+1);
                break;
            }else if(iLength>iCutLength){
                sInString=sInString.Substring(0,i);
                break;
            }
        }
    }
    return sInString;
}

在ASP.NET或C#中,怎么截取字符串

protected   string   CutString(string   str,int   length)  
  {  
    string   newString="";  
    if(str!="")  
    {  
      if(str.Length>length)  
      {  
        newString=str.Substring(0,length)+"...";  
      }  
      else  
      {  
        newString=str;  
      }      
    }  
    return   newString;  
  }  
   
  然后在绑定的时候：  
  <%#   CutString(DataBinder.Eval(Container.DataItem,"NewTitle").ToString(),5)   %>

 

asp.net(c#) datelist DataGrid 中截取字符串加"..." 和 鼠标放上去字符全部显示

前台
<asp:TemplateColumn HeaderText="绑定网址">
            <HeaderStyle HorizontalAlign="Center" Width="100px"></HeaderStyle>
            <ItemStyle HorizontalAlign="Center"></ItemStyle>
            <ItemTemplate>
             <FONT face="宋体">
              <asp:HyperLink id="HyperLink1" runat="server" Target=_blank text='<%# PartSubString(DataBinder.Eval(Container.DataItem,"url").ToString())%>' NavigateUrl='<%# DataBinder.Eval(Container.DataItem,"url")%>' ToolTip='<%# DataBinder.Eval(Container.DataItem,"url")%>'>
              </asp:HyperLink></FONT>
            </ItemTemplate>
            <FooterStyle HorizontalAlign="Center"></FooterStyle>
           </asp:TemplateColumn>
后台.cs
protected string PartSubString(string s)
  {
   if(s.Length>15)
   {
    return s.Substring(0,15)+"..."; 
   }
   return s;
  }

 

用C#截取指定长度的中英文混合字符串

我们常做的一件事情，就是在文章系统中，截取一定长度的文章标题，超过指定长度，就加“...”

如两个字符串：
string str1 = "中国人要啊abc呀~";
string str2 = "1中国人23456abc呀~";

要截取后，输出：

str1 = "中国人要...";
str2 = "1中国人2...";

即要把中英文混合的字符串，在截取后，长度要一致，即8个字节的长度(不包括三个点)，而且不能出现中文被从中间截断的情况。于是写了个方法：

public static string getStr(string s,int l)
    {   
    string temp = s ;
    if (Regex.Replace(temp,"[\u4e00-\u9fa5]","zz",RegexOptions.IgnoreCase).Length<=l)
    {
        return temp;
    }
    for (int i=temp.Length;i>=0;i--)
    {
        temp = temp.Substring(0,i);
        if (Regex.Replace(temp,"[\u4e00-\u9fa5]","zz",RegexOptions.IgnoreCase).Length<=l-3)
        {
            return temp + "";
        }   
    }
    return "";
    }
调用：
string content = "中国人啊abc呀呀呀呀";
content = getStr(content,13);

C#截取指定长度中英文字符串方法 ()
string s = "iam方枪枪";
int len = s.Length;//will output as 6
byte[] sarr = System.Text.Encoding.Default.GetBytes(s);
len = sarr.Length;//will output as 3+3*2=9

public static string GetFirstString(string stringToSub, int length)
        {
            Regex regex = new Regex("[\u4e00-\u9fa5]+", RegexOptions.Compiled);
            char[] stringChar = stringToSub.ToCharArray();
            StringBuilder sb = new StringBuilder();
            int nLength = 0;
            bool isCut=false;
            for(int i = 0; i < stringChar.Length; i++)
            {
                if (regex.IsMatch((stringChar[i]).ToString()))
                {
                    sb.Append(stringChar[i]);
                    nLength += 2;
                }
                else
                {
                    sb.Append(stringChar[i]);
                    nLength = nLength + 1;
                }

                if (nLength > length)
                {
                    isCut=true;
                    break;
                }
            }
            if(isCut)
                return sb.ToString()+"..";
            else
                return sb.ToString();
        }

C#截取指定长度中英文字符串方法 (修改)

public static string GetFirstString(string stringToSub, int length)
{
Regex regex = new Regex("[\u4e00-\u9fa5]+", RegexOptions.Compiled);
char[] stringChar = stringToSub.ToCharArray();
StringBuilder sb = new StringBuilder();
int nLength = 0;
for(int i = 0; i < stringChar.Length; i++)
{
if (regex.IsMatch((stringChar[i]).ToString()))
{
nLength += 2;
}
else
{
nLength = nLength + 1;
}

if (nLength <= length)
{
sb.Append(stringChar[i]);
}
else
{
break;
}
}
if(sb.ToString() != stringToSub)
{
sb.Append("...");
}
return sb.ToString();
}