class Program
{
static void Main ( string[ ] args )
{
SomeClass s = new SomeClass( );
s.GetType( ).GetField( "id",System.Reflection.BindingFlags.NonPublic ) // sorry reasently updated to GetField from GetProperty...
.SetValue( s,"new value" );
}
}
class SomeClass
{
object id;
public object Id
{
get
{
return id;
}
}
}
我正在设置一个私有字段的值.
这是我得到的exeption：
System.NullReferenceException was unhandled Message=Object reference
not set to an instance of an object. Source=ConsoleApplication7
StackTrace:
at Program.Main(String[] args) in C:\Users\Antonio\Desktop\ConsoleApplication7\ConsoleApplication7\Program.cs:line
18
at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly,String[] args)
at System.AppDomain.ExecuteAssembly(String assemblyFile,Evidence assemblySecurity,String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext,ContextCallback callback,Object state,Boolean
ignoreSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext,Object state)
at System.Threading.ThreadHelper.ThreadStart() InnerException:
解决方法
var prop = s.GetType().GetField("id",System.Reflection.BindingFlags.NonPublic
| System.Reflection.BindingFlags.Instance);
prop.SetValue(s,"new value");
我的更改是使用GetField方法 – 您正在访问一个字段而不是一个属性,以及使用NonPublic与Instance.
