C#将字符串中间部分替换为*号

 1 /// <summary>
 2 /// 返回隐藏中间的字符串
 3 /// </summary>
 4 /// <param name="Input">输入</param>
 5 /// <returns>输出</returns>
 6 public static string GetxxxString(string Input)
 7 {
 8     string Output = "";
 9     switch (Input.Length)
10     {
11         case 1:
12             Output = "*";
13             break;
14         case 2:
15             Output = Input[0] + "*";
16             break;
17         case 0:
18             Output = "";
19             break;
20         default:
21             Output = Input.Substring(0, 1);
22             for (int i = 0; i < Input.Length - 2; i++)
23             {
24                 Output += "*";
25             }
26             Output += Input.Substring(Input.Length - 1, 1);
27             break;
28     }
29     return Output;
30 }