C#动态执行代码
动态执行代码
代码1
using
System;
using
System.Collections.Generic;
using
System.Reflection;
using
System.Text;
using
System.CodeDom;
using
System.CodeDom.Compiler;
namespace
csrepl {
class
Program {
static
string
funcprefix
=
"
using System;
"
+
"
public delegate void Proc();
"
+
"
public class Wrapper {
"
+
"
public static object Set(string name, object value) {
"
+
"
AppDomain.CurrentDomain.SetData(name, value);
"
+
"
return value;
"
+
"
}
"
+
"
public static object Get(string name) {
"
+
"
return AppDomain.CurrentDomain.GetData(name);
"
+
"
}
"
+
"
public static object Invoke(Proc proc) {
"
+
"
proc();
"
+
"
return null;
"
+
"
}
"
+
"
public static object Eval() { return
"
;
static
string
funcsuffix
=
"
; } }
"
;
static
string
StringEval(
string
expr) {
string
program
=
funcprefix
+
expr
+
funcsuffix;
ICodeCompiler compiler
=
CodeDomProvider.CreateProvider(
"
C#
"
).CreateCompiler();
CompilerParameters cp
=
new
CompilerParameters();
cp.GenerateExecutable
=
false
;
cp.GenerateInMemory
=
true
;
CompilerResults results
=
compiler.CompileAssemblyFromSource(cp, program);
if
(results.Errors.HasErrors) {
if
(results.Errors[
0
].ErrorNumber
==
"
CS0029
"
)
return
StringEval(
"
Invoke(delegate {
"
+
expr
+
"
; })
"
);
return
results.Errors[
0
].ErrorText;
}
else
{
Assembly assm
=
results.CompiledAssembly;
Type target
=
assm.GetType(
"
Wrapper
"
);
MethodInfo method
=
target.GetMethod(
"
Eval
"
);
object
result
=
method.Invoke(
null
,
null
);
return
result
==
null
?
null
: result.ToString();
}
}
static
void
Main(
string
[] args) {
while
(
true
) {
Console.Write(
"
>
"
);
Console.Out.Flush();
string
expr
=
Console.ReadLine();
if
(expr
==
null
)
break
;
try
{
string
result
=
StringEval(expr);
Console.WriteLine(result);
}
catch
(TargetInvocationException ex) {
Console.WriteLine(ex.InnerException.GetType().Name
+
"
:
"
+
ex.InnerException.Message);
}
catch
(Exception ex) {
Console.WriteLine(ex.GetType().Name
+
"
:
"
+
ex.Message);
}
}
}
}
}
代码2
private
void
Compiler(
string
code)
{
CompilerParameters vCompilerParameters
=
new
CompilerParameters();
vCompilerParameters.GenerateExecutable
=
false
;
vCompilerParameters.GenerateInMemory
=
true
;
vCompilerParameters.ReferencedAssemblies.Add(
"
System.Windows.Forms.dll
"
);
string
vSource
=
"
using System.Windows.Forms;\n
"
+
"
public class Temp\n
"
+
"
{\n
"
+
"
public void Test()\n
"
+
"
{\n
"
+
"
"
+
code
+
"
\n
"
+
"
}\n
"
+
"
}\n
"
;
CompilerResults vCompilerResults
=
CodeDomProvider.CreateProvider(
"
CSharp
"
).CompileAssemblyFromSource(vCompilerParameters, vSource);
Assembly vAssembly
=
vCompilerResults.CompiledAssembly;
object
vTemp
=
vAssembly.CreateInstance(
"
Temp
"
);
MethodInfo vTest
=
vTemp.GetType().GetMethod(
"
Test
"
);
vTest.Invoke(vTemp,
null
);
}
string
code
=
"
int sum = 0;\nfor(int i = 0; i < 100; i++)\n{\nsum += i;\n}\nMessageBox.Show(sum.ToString());
"
;
Compiler(code);
