标签：ASP int 截取 len tempLen str tempString 字符串 NET
#region 截取指定字数字符串
/// <summary>
/// 格式化字符串,取字符串前 strLength 位，其他的用...代替.
/// 计算字符串长度。汉字两个字节，字母一个字节
/// </summary>
/// <param name="str">字符串</param>
/// <param name="strLength">字符串长度</param>
/// <returns></returns>
public static string FormatStr(string str, int len)
{
ASCIIEncoding ascii = new ASCIIEncoding();
int tempLen = 0;
string tempString = "";
byte[] s = ascii.GetBytes(str);
for (int i = 0; i < s.Length; i++)
{
if ((int)s[i] == 63)
{ tempLen += 2; }
else
{ tempLen += 1; }
try
{ tempString += str.Substring(i, 1); }
catch
{ break; }
if (tempLen > len) break;
}
//如果截过则加上半个省略号
byte[] mybyte = System.Text.Encoding.Default.GetBytes(str);
if (mybyte.Length > len)
tempString += "......";
tempString = tempString.Replace(" ", " ");
tempString = tempString.Replace("<", "<");
tempString = tempString.Replace(">", ">");
tempString = tempString.Replace('\n'.ToString(), "<br>");
return tempString;
} #endregion
标签：ASP,
int,
截取,
len,
tempLen,
str,
tempString,
字符串,
NET
From： https://blog.51cto.com/u_1040535/7635520