上一回我們試驗了通過反射的方式獲取method的源代碼。
這次我們就用一個實例來演示dump一個程序集中的所有類型和方法的IL源代碼。
首先打開VS2005 新建一個C＃的windows程序：
在窗體添加添加一個2個 button，2個label，一個textbox，一個 checkbox，一個savefiledialog。
界面如下：
事件代碼如下：
1 public class Form1 : Form
2 {
3 // Methods
4 //選擇IL字節碼保存文件
5 private void button1_Click(object sender, EventArgs e)
6 {
7 if (this.saveFileDialog1.ShowDialog() == DialogResult.OK)
8 {
9 this.textBox1.Text = this.saveFileDialog1.FileName;
10 }
11 }
12 //點擊開始dump。
13 private void button3_Click(object sender, EventArgs e)
14 {
15 this.button3.Enabled = false;
16 this.DumpAssembly(Assembly.GetExecutingAssembly(), this.textBox1.Text);
17 MessageBox.Show("dump ok");
18 this.button3.Enabled = true;
19 }
20 //這個函數將一個Assembly全部dump到path中。
21 private void DumpAssembly(Assembly ass, string path)
22 {
23 StreamWriter writer1 = new StreamWriter(path, false);
24 Type[] typeArray1 = ass.GetTypes();
25 for (int num1 = 0; num1 < typeArray1.Length; num1++)
26 {
27 this.DumpType(typeArray1[num1], writer1);
28 }
29 writer1.Flush();
30 writer1.Close();
31 }
32
33 //dump單個類型，由dumpassembly調用
34 private void DumpType(Type tp, StreamWriter sw)
35 {
36 BindingFlags flags1 = BindingFlags.NonPublic | BindingFlags.Public | BindingFlags.Static | BindingFlags.Instance | BindingFlags.DeclaredOnly;
37 string text1 = tp.ToString();
38 sw.Write("TYPE: " + text1 + "/r/n");
39 if (tp.IsEnum)
40 {
41 sw.Write("IsEnum ");
42 }
43 if (tp.IsImport)
44 {
45 sw.Write("IsImport ");
46 }
47 if (tp.IsNested)
48 {
49 sw.Write("IsNested ");
50 }
51 if (tp.IsClass)
52 {
53 sw.Write("IsClass");
54 }
55 sw.Write("/r/n");
56 if ((text1 != "InFaceMaxtoCode") || !this.checkBox1.Checked)
57 {
58 sw.Write("**********Begin MemberInfo**********/r/n");
59 MemberInfo[] infoArray1 = tp.GetMembers(flags1);
60 for (int num1 = 0; num1 < infoArray1.Length; num1++)
61 {
62 MemberInfo info1 = infoArray1[num1];
63 sw.Write(info1.MemberType.ToString() + "/t" + infoArray1[num1].ToString() + "/r/n");
64 if ((info1.MemberType == MemberTypes.Method) || (info1.MemberType == MemberTypes.Constructor))
65 {
66 this.DumpMethod((MethodBase) info1, sw);
67 }
68 }
69 sw.Write("********** End MemberInfo**********/r/n");
70 sw.Write("/r/n/r/n");
71 }
72 }
73
74
75
76 //dump單個方法，由dumptype調用
77 private void DumpMethod(MethodBase mb, StreamWriter sw)
78 {
79 MethodBody body1 = mb.GetMethodBody();
80 if (body1 != null)
81 {
82 byte[] buffer1 = body1.GetILAsByteArray();
83 try
84 {
85 sw.Write("/tMaxStackSize: " + body1.MaxStackSize.ToString());
86 sw.Write("/tCodeSize: " + buffer1.Length.ToString());
87 sw.Write("/r/n");
88 }
89 catch (Exception exception1)
90 {
91 MessageBox.Show("1:" + mb.ToString() + "/r/n" + exception1.ToString());
92 }
93 foreach (LocalVariableInfo info1 in body1.LocalVariables)
94 {
95 sw.Write("LocalVar: " + info1.ToString());
96 sw.Write("/r/n");
97 }
98 sw.Write("/r/n/r/n");
99 StringBuilder builder1 = new StringBuilder();
100 foreach (byte num1 in buffer1)
101 {
102 builder1.Append(num1.ToString("X2"));
103 }
104 sw.Write(builder1.ToString());
105 sw.Write("/r/n/r/n");
106 foreach (ExceptionHandlingClause clause1 in body1.ExceptionHandlingClauses)
107 {
108 sw.Write(clause1.ToString());
109 sw.Write("/r/n");
110 }
111 sw.Write("/r/n");
112 }
113 }
114
115
116
117
118
119 }
120
121
編譯這個程序，運行，dump出il字節碼，
然後拿 maxtocode加密。再運行，dump出il字節碼，然後找一個method 如 button1_click，比較一下他們的IL字節碼是否一樣。
當然結果應該是一樣的。
這裏主要有三個關鍵函數
private void DumpAssembly(Assembly ass, string path);
private void DumpMethod(MethodBase mb, StreamWriter sw);
private void DumpType(Type tp, StreamWriter sw);
這三個就是一個例子演示如何dump整個程序集。
如要dump 一個加密的dll，我們就可以直接用這個程序來改，
首先添加引用，引用那個dll，然後隨便實例話一個該dll中的type。
然後獲取該dll的 Assembly 對象，再調用DumpAssembly函數即可