C# 动态加载程序集

定义动态程序集

 1 namespace DynamicAssembly
 2 {
 3    
 4   public  class CodeDriver : MarshalByRefObject
 5     {
 6         private string prefix =
 7        "using System;" +
 8        "public static class Driver" +
 9        "{" +
10        "   public static void Run()" +
11        "   {";
12 
13         private string postfix =
14            "   }" +
15            "}";
16 
17 
18         
19         public string CompileAndRun(string input, out bool hasError)
20         {
21             //for (int i = 0; i < 10;i++ )
22             //{ Console.WriteLine(i); }
23                 hasError = false;
24             string returnData = null;
25 
26             CompilerResults results = null;
27             using (var provider = new CSharpCodeProvider())
28             {
29                 var options = new CompilerParameters();
30                 options.GenerateInMemory = true;
31 
32                 var sb = new StringBuilder();
33                 sb.Append(prefix);
34                 sb.Append(input);
35                 sb.Append(postfix);
36 
37                 results = provider.CompileAssemblyFromSource(options, sb.ToString());
38             }
39 
40             if (results.Errors.HasErrors)
41             {
42                 hasError = true;
43                 var errorMessage = new StringBuilder();
44                 foreach (CompilerError error in results.Errors)
45                 {
46                     errorMessage.AppendFormat("{0} {1}", error.Line, error.ErrorText);
47                 }
48                 returnData = errorMessage.ToString();
49             }
50             else
51             {
52                 TextWriter temp = Console.Out;
53                 var writer = new StringWriter();
54                 Console.SetOut(writer);
55                 Type driverType = results.CompiledAssembly.GetType("Driver");
56 
57                 driverType.InvokeMember("Run", BindingFlags.InvokeMethod |
58                       BindingFlags.Static | BindingFlags.Public,
59                       null, null, null);
60 
61                 Console.SetOut(temp);
62 
63                 returnData = writer.ToString();
64             }
65 
66             return returnData;
67         }
68     }
69 }

View Code

编写调用代码

 1 namespace DynamicAssembly
 2 {
 3    public class CodeDriverInAppDomain
 4     {
 5         public string CompileAndRun(string code, out bool hasError)
 6         {
 7             AppDomain codeDomain = AppDomain.CreateDomain("CodeDriver");
 8 
 9             CodeDriver codeDriver = (CodeDriver)
10                   codeDomain.CreateInstanceAndUnwrap("DynamicAssembly",
11                         "DynamicAssembly.CodeDriver");
12 
13             string result = codeDriver.CompileAndRun(code, out hasError);
14 
15             AppDomain.Unload(codeDomain);
16 
17             return result;
18         }
19 
20      
21     }
22 }

View Code

wpf 页面代码

 1 <Window x:Class="DynamicAssembly.MainWindow"
 2         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
 3         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
 4         Title="MainWindow" Height="350" Width="525">
 5     <Grid>
 6         <Grid.RowDefinitions>
 7             <RowDefinition />
 8             <RowDefinition />
 9         </Grid.RowDefinitions>
10         <Grid.ColumnDefinitions>
11             <ColumnDefinition />
12             <ColumnDefinition Width="Auto" MinWidth="120" />
13         </Grid.ColumnDefinitions>
14         <TextBox x:Name="textCode" AcceptsReturn="True" AcceptsTab="True" Grid.Row="0" Grid.Column="0" Margin="4" />
15         <Button Click="Compile_Click" Grid.Row="0" Grid.Column="1" Content="Compile and Run" Margin="5, 10, 5, 10" />
16         <TextBlock x:Name="textOutput" Grid.Row="1" Grid.Column="0" Grid.ColumnSpan="2" Margin="4" />
17     </Grid>
18 
19 </Window>

View Code

后台代码

 1  private void Compile_Click(object sender, RoutedEventArgs e)
 2         {
 3          //   var custom = new CustomClassDamain();
 4           //  string s = custom.CompileAndRun();
 5 
 6             textOutput.Background = Brushes.White;
 7             var driver = new CodeDriverInAppDomain();
 8             bool isError;
 9             textOutput.Text = driver.CompileAndRun(textCode.Text, out isError);
10             if (isError)
11             {
12                 textOutput.Background = Brushes.Red;
13             }
14 
15           
16         }

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