.net 字符串长度自动换行

 

 

 

 

if (todo.Title.Length > 50)
                ilblTitle.Text = CutStr(todo.Title, 50);
            //ilblTitle.Text = EncodeHelper.MultiHtmlEncode(todo.Title.Substring(0, 50));
            else
                ilblTitle.Text = EncodeHelper.MultiHtmlEncode(todo.Title);

 

#region 截取字符串，不限制字符串长度
/// </summary>
/// <param name="str">待截取的字符串</param>
/// <param name="len">每行的长度，多于这个长度自动换行</param>
/// <returns></returns>
public string CutStr(string str, int len)
{ string s = "";

for(int i=0;i<str.Length ;i++)
{
int r = i % len;
int last = (str.Length / len) * len;
if (i!=0 && i<=last)
{

if(r==0)
{
s+=str.Substring(i-len,len)+"<br>";
}

}
else if (i>last)
{
s+=str.Substring(i-1) ;
break;
}

}

return s;

}
#endregion

 

#region 截取字符串并限制字符串长度，多于给定的长度＋。。。
/// <param name="str">待截取的字符串</param>
/// <param name="len">每行的长度，多于这个长度自动换行</param>
/// <param name="max">输出字符串最大的长度</param>
/// <returns></returns>
public string CutStr(string str, int len, int max)
{
string s = "";
string sheng = "";
if (str.Length >max)
{
str=str.Substring(0,max) ;
sheng="";
}
for(int i=0;i<str.Length ;i++)
{
int r = i % len;
int last = (str.Length / len) * len;
if (i!=0 && i<=last)
{

if(r==0)
{
s+=str.Substring(i-len,len)+"<br>";
}

}
else if (i>last)
{
s+=str.Substring(i-1) ;
break;
}

}

return s+sheng;

}
#endregion