|
public static Cut ( String str, |
||
| str | String | 字符串 |
| maxLength | 截取后字符串的最大允许长度，包含后面填充 | |
| pad | String | 需要填充在后面的字符串，比如几个圆点 |
| return | String | |
public static String Cut(this String str, Int32 maxLength, String pad = null)
{
if (String.IsNullOrEmpty(str) || maxLength <= 0 || str.Length < maxLength) return str;
// 计算截取长度
var len = maxLength;
if (!String.IsNullOrEmpty(pad)) len -= pad.Length;
if (len <= 0) return pad;
return str.Substring(0, len) + pad;
}
