C# 如何使用dnlib添加对MessageBox.Show()的调用?
我正在尝试从dnlib调用MessageBox.Show。我有一个查找Show方法的函数:C# 如何使用dnlib添加对MessageBox.Show()的调用?,c#,.net,opcode,ilasm,dnlib,C#,.net,Opcode,Ilasm,Dnlib,我正在尝试从dnlib调用MessageBox.Show。我有一个查找Show方法的函数: MethodDef GetSystemMethod(Type DeclaringType, string Methodname, Type[] MethodParams) { var filename = DeclaringType.Module.FullyQualifiedName; var mod = ModuleDefMD.Load(filename);
MethodDef GetSystemMethod(Type DeclaringType, string Methodname, Type[] MethodParams)
{
var filename = DeclaringType.Module.FullyQualifiedName;
var mod = ModuleDefMD.Load(filename);
TypeDef[] types = mod.GetTypes().ToArray();
foreach(TypeDef t in types)
{
if(t.Name==DeclaringType.Name)
{
foreach(var m in t.Methods)
{
bool ok = true;
int i = 0;
foreach(var p in m.Parameters)
{
if (p.Type.TypeName != MethodParams[i].Name) ok = false;
}
if(ok)
{
return m;
}
}
}
}
throw new Exception("System Method not found!");
}
我就是这样使用它的:
method.Body.Instructions.Clear();
method.Body.Instructions.Add(dnlib.DotNet.Emit.OpCodes.Nop.ToInstruction());
method.Body.Instructions.Add(dnlib.DotNet.Emit.OpCodes.Ldstr.ToInstruction("changed method here!"));
method.Body.Instructions.Add(dnlib.DotNet.Emit.OpCodes.Call.ToInstruction(GetSystemMethod(typeof(MessageBox), "Show", new Type[] { typeof(string)})));
method.Body.Instructions.Add(dnlib.DotNet.Emit.OpCodes.Pop.ToInstruction());
method.Body.Instructions.Add(dnlib.DotNet.Emit.OpCodes.Ret.ToInstruction());
module.Write(Path.GetDirectoryName(file) + "\\changed-" + Path.GetFileName(file));
当我运行它时,当它试图将模块写入文件时,会出现此异常。有人能看一下并解释一下我做错了什么吗
dnlib.DotNet.Writer.ModuleWriterException: 'Method System.Windows.Forms.HelpInfo System.Windows.Forms.MessageBox::get_HelpInfo() (06002BE3) is not defined in this module (TestProj.exe). A method was removed that is still referenced by this module.'
你解决了这个问题吗?没有,很不幸,我不知道为什么没有人回答。我觉得我问了一个愚蠢的问题。没有愚蠢的问题,试着把
GetSystemMethod
包装在method.Module.Import()
里面看看它是否有效,像这样:method.Body.Instructions.Add(dnlib.DotNet.Emit.OpCodes.Call.ToInstruction)(method.Module.Import(GetSystemMethod)(typeof(MessageBox),“Show”,new Type[]{typeof(string)}))));代码>