(go + organize) dynamic code execution in C #

Tag: Message code executes itself enc RPC ESS generic OBJC. dll

The Csharpcodeprovider,compilerparameters,compilerresults class, which is provided by Microsoft, allows you to dynamically execute code files that you write at run time. The principle is to dynamically compile your code files into an EXE or DLL, or output in memory, then reflect through assembly, execute methods in them, or access properties in them.

The interface has two buttons, one executes the ShowMessage method, the other executes the ShowForm method, the code is as follows:

Need to introduce

Using System;
Using System.Collections.Generic;
Using System.ComponentModel;
Using System.Data;
Using System.Drawing;
Using System.Linq;
Using System.Text;
Using System.Threading.Tasks;
Using System.Windows.Forms;
Using Microsoft.csharp;
Using System.CodeDom;
Using System.CodeDom.Compiler;
Using System.Reflection;

Namespace Codetest
{
public partial class Test:form
{
Public Test ()
{
InitializeComponent ();
}

private void Button1_Click (object sender, EventArgs e)
{
CSharpCodeProvider Objcsharpcodeprivoder = new CSharpCodeProvider ();
CompilerParameters objcompilerparameters = new CompilerParameters ();

OBJCOMPILERPARAMETERS.REFERENCEDASSEMBLIES.ADD ("System.dll");
OBJCOMPILERPARAMETERS.REFERENCEDASSEMBLIES.ADD ("System.Windows.Forms.dll");

Objcompilerparameters.generateexecutable = false;
Objcompilerparameters.generateinmemory = true;

CompilerResults Cresult = Objcsharpcodeprivoder.compileassemblyfromsource (objcompilerparameters, TextBox1.Text);

if (Cresult. Errors.haserrors)
{
foreach (CompilerError err in Cresult. Errors)
{
MessageBox.Show (Err. ErrorText);
}
}
Else
{
Execute the code through reflection
Assembly objassembly = cresult.compiledassembly;
Object obj = objassembly.createinstance ("Codetest.test");
MethodInfo Objmi = obj. GetType (). GetMethod ("ShowMessage");
Objmi.invoke (obj, new object[] {"This is codetest!"});
}
}

private void Form1_Load (object sender, EventArgs e)
{
TextBox1.Text = "Using System;" + Environment.NewLine +
"Using System.Windows.Forms;" + Environment.NewLine +
Environment.NewLine +
"Namespace Codetest" + Environment.NewLine +
"{" + Environment.NewLine +
"Public partial class Test" + Environment.NewLine +
"{" + Environment.NewLine +
' \ t ' + ' public void ShowMessage (string msg) ' + Environment.NewLine +
' \ t ' + ' {' + Environment.NewLine +
' \ t ' + ' MessageBox.Show (msg); "+ Environment.NewLine +
' \ t ' + '} ' + Environment.NewLine +
Environment.NewLine +
' \ t ' + ' public void showform () ' + Environment.NewLine +
' \ t ' + ' {' + Environment.NewLine +
' \ t ' + ' form frm = new form (); "+ Environment.NewLine +
' \ t ' + ' frm. Show (); "+ Environment.NewLine +
' \ t ' + '} ' + Environment.NewLine +
"}" + Environment.NewLine +
"}";
}

private void Button2_Click (object sender, EventArgs e)
{

CSharpCodeProvider Objcsharpcodeprivoder = new CSharpCodeProvider ();
CompilerParameters objcompilerparameters = new CompilerParameters ();

OBJCOMPILERPARAMETERS.REFERENCEDASSEMBLIES.ADD ("System.dll");
OBJCOMPILERPARAMETERS.REFERENCEDASSEMBLIES.ADD ("System.Windows.Forms.dll");

Objcompilerparameters.generateexecutable = false;
Objcompilerparameters.generateinmemory = true;

CompilerResults Cresult = Objcsharpcodeprivoder.compileassemblyfromsource (objcompilerparameters, TextBox1.Text);

if (Cresult. Errors.haserrors)
{
foreach (CompilerError err in Cresult. Errors)
{
MessageBox.Show (Err. ErrorText);
}
}
Else
{
Execute the code through reflection
Assembly objassembly = cresult.compiledassembly;
Object obj = objassembly.createinstance ("Codetest.test");
MethodInfo Objmi = obj. GetType (). GetMethod ("ShowForm");
Objmi.invoke (obj, null);
}
}
}
}

Click the button "execute code" to run the following results:

Click the button "Show form" and the code executes as follows:

Because the custom code has

Using System;
Using System.Windows.Forms;

The above two class libraries are required to execute, so to add a reference to these two DLLs in CompilerParameters,

objCompilerParameters.ReferencedAssemblies.Add("System.dll");

objCompilerParameters.ReferencedAssemblies.Add("System.Windows.Forms.dll");

When reflecting, the name of the namespace is written in full, the namespace in the instance is Codetest, the class is Test, so the reflection code is objassembly.createinstance ("Codetest.test")

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(go + organize) dynamic code execution in C #