#region 截取字符串
2 public static string GetSubString(string p_SrcString, int p_Length, string p_TailString)
3 {
4 return GetSubString(p_SrcString, 0, p_Length, p_TailString);
5 }
6 public static string GetSubString(string p_SrcString, int p_StartIndex, int p_Length, string p_TailString)
7 {
8 string str = p_SrcString;
9 byte[] bytes = Encoding.UTF8.GetBytes(p_SrcString);
10 foreach (char ch in Encoding.UTF8.GetChars(bytes))
11 {
12 if (((ch > 'ࠀ') && (ch < '一')) || ((ch > 0xac00) && (ch < 0xd7a3)))
13 {
14 if (p_StartIndex >= p_SrcString.Length)
15 {
16 return "";
17 }
18 return p_SrcString.Substring(p_StartIndex, ((p_Length + p_StartIndex) > p_SrcString.Length) ? (p_SrcString.Length - p_StartIndex) : p_Length);
19 }
20 }
21 if (p_Length < 0)
22 {
23 return str;
24 }
25 byte[] sourceArray = Encoding.Default.GetBytes(p_SrcString);
26 if (sourceArray.Length <= p_StartIndex)
27 {
28 return str;
29 }
30 int length = sourceArray.Length;
31 if (sourceArray.Length > (p_StartIndex + p_Length))
32 {
33 length = p_Length + p_StartIndex;
34 }
35 else
36 {
37 p_Length = sourceArray.Length - p_StartIndex;
38 p_TailString = "";
39 }
40 int num2 = p_Length;
41 int[] numArray = new int[p_Length];
42 byte[] destinationArray = null;
43 int num3 = 0;
44 for (int i = p_StartIndex; i < length; i++)
45 {
46 if (sourceArray[i] > 0x7f)
47 {
48 num3++;
49 if (num3 == 3)
50 {
51 num3 = 1;
52 }
53 }
54 else
55 {
56 num3 = 0;
57 }
58 numArray[i] = num3;
59 }
60 if ((sourceArray[length - 1] > 0x7f) && (numArray[p_Length - 1] == 1))
61 {
62 num2 = p_Length + 1;
63 }
64 destinationArray = new byte[num2];
65 Array.Copy(sourceArray, p_StartIndex, destinationArray, 0, num2);
66 return (Encoding.Default.GetString(destinationArray) + p_TailString);
67 }
68 #endregion
