Csharp/CSharp Tutorial/Reflection/Field
Содержание
Deeper Reflection: iterate through the fields of the class
<source lang="csharp">using System; using System.Reflection; class MyClass {
MyClass() {}
static void Process()
{
}
public int MyFunction(int i, Decimal d, string[] args)
{
return(0);
}
public int value = 0;
public float log = 1.0f;
public static int value2 = 44;
} class MainClass {
public static void Main(String[] args)
{
//
Console.WriteLine("Fields of MyClass");
Type t = typeof (MyClass);
foreach (MemberInfo m in t.GetFields())
{
Console.WriteLine("{0}", m);
}
}
}</source>
Fields of MyClass Int32 value Single log Int32 value2
Get all fields from a Type
<source lang="csharp">using System; using System.Reflection; class MyClass {
public int Field1;
public int Field2;
public void Method1() { }
public int Method2() { return 1; }
} class MainClass {
static void Main()
{
Type t = typeof(MyClass);
FieldInfo[] fi = t.GetFields();
foreach (FieldInfo f in fi)
Console.WriteLine("Field : {0}", f.Name);
}
}</source>
Field : Field1 Field : Field2
Get/set a field using a FieldInfo
<source lang="csharp">using System; using System.Reflection; using System.Windows.Forms;
public class Class1
{
static void Main( string[] args )
{
Type type = typeof(MyClass);
object o = Activator.CreateInstance(type);
FieldInfo field = type.GetField("text", BindingFlags.NonPublic | BindingFlags.Instance);
field.SetValue(o, "www.domain.ru");
string text = (string)field.GetValue(o);
Console.WriteLine(text);
}
private static void OnChanged(object sender , System.EventArgs e)
{
Console.WriteLine(((MyClass)sender).Text);
}
}
public class MyClass
{
private string text;
public string Text
{
get{ return text; }
set
{
text = value;
OnChanged();
}
}
private void OnChanged()
{
if( Changed != null )
Changed(this, System.EventArgs.Empty);
}
public event EventHandler Changed;
}</source>
List Fields
<source lang="csharp">using System; using System.Reflection; public interface IFaceOne {
void MethodA();
} public interface IFaceTwo {
void MethodB();
} public class MyClass: IFaceOne, IFaceTwo {
public enum MyNestedEnum{}
public int myIntField;
public string myStringField;
public void myMethod(int p1, string p2)
{
}
public int MyProp
{
get { return myIntField; }
set { myIntField = value; }
}
void IFaceOne.MethodA(){}
void IFaceTwo.MethodB(){}
} public class MainClass {
public static void Main(string[] args)
{
MyClass f = new MyClass();
Type t = f.GetType();
FieldInfo[] fi = t.GetFields();
foreach(FieldInfo field in fi)
Console.WriteLine("Field: {0}", field.Name);
}
}</source>
Field: myIntField Field: myStringField
Reflecting On Members Of A Type
<source lang="csharp">using System; using System.Collections.Generic; using System.Reflection; using System.Text;
public class Tester
{
public static void Main()
{
Type theType = Type.GetType("System.Reflection.Assembly" );
Console.WriteLine("\nSingle Type is {0}\n", theType );
MemberInfo[] mbrInfoArray =theType.GetMembers();
foreach ( MemberInfo mbrInfo in mbrInfoArray )
{
Console.WriteLine( "{0} is a {1}",mbrInfo, mbrInfo.MemberType );
}
}
}</source>
