获取省略字符串

当字符串超过一定长度时，截取部分并添加“...”：

 1         private string CutString(string s, Font font, int Width)
 2         {
 3             string cutStr = "";
 4             for (int i=1; i<= s.Length; i++)
 5             {
 6                 string c = s.Substring(0, i);
 7                 if (TextRenderer.MeasureText(c, font).Width <= Width)
 8                 {
 9                     cutStr = c;
10                 }
11                 else
12                 {
13                     break;
14                 }
15             }
16             return cutStr;
17         }
18 
19         private string GetOmitString(string s, Font font, int MaxWidth)
20         {
21             if (s != null)
22             {
23                 int width = TextRenderer.MeasureText(s, font).Width;
24                 if (width > MaxWidth)
25                 {
26                     int pointWidth = TextRenderer.MeasureText("...", font).Width;
27                     return CutString(s, font, MaxWidth - pointWidth) + "...";
28                 }
29                 else
30                 {
31                     return s;
32                 }
33             }
34             else
35             {
36                 return null;
37             }
38         }

测试代码：

1 string s = @"E:我的软件EnvironmentEnvironmentEnvironmentEnvironmentEnvironmentEnvironmentEnvironmentEnvironment.exe";
2 lblPath.Text = GetOmitString(s, lblPath.Font, PathMaxWidth);

效果：