L'ho già fatto prima. Devi trasmettere il documento in IExpando, quindi puoi effettuare chiamate di riflessione per ottenere membri. Ho effettivamente creato una classe DynamicNode che consente di utilizzare la parola chiave dinamica per interagire con il documento.
Si potrebbe desiderare di utilizzare l'oggetto mshtml COM invece però: Reusing MSHTML
- Aggiungere un riferimento alla MSHTML nella lista di riferimento COM
- Creare un'istanza
var document = new mshtml.HTMLDocument();
- Fusioni a IExpando:
var window = (IExpando)document.parentWindow;
- Creare un wrapper oggetto dinamico (vedere di seguito)
- Utilizzare la parola chiave dinamica per interagire con il documento.
Per esempio qui è il mio nodo dinamica:
class DynamicNode : DynamicObject, IExpando, IEnumerable
{
private IExpando value;
public DynamicNode(IExpando value)
{
this.value = value;
}
public override bool TryUnaryOperation(UnaryOperationBinder binder, out object result)
{
switch (binder.Operation)
{
case System.Linq.Expressions.ExpressionType.Convert:
case System.Linq.Expressions.ExpressionType.ConvertChecked:
result = this.value;
return true;
}
return base.TryUnaryOperation(binder, out result);
}
public override IEnumerable<string> GetDynamicMemberNames()
{
return this.value
.GetMembers(BindingFlags.Instance | BindingFlags.Public)
.Select(m => m.Name)
.Distinct()
.ToArray();
}
public override bool TryConvert(ConvertBinder binder, out object result)
{
result = this.value;
return true;
}
public override bool TryGetIndex(GetIndexBinder binder, object[] indexes, out object result)
{
if (indexes.Length == 1)
{
var memberName = indexes[0].ToString();
result = ReflectionHelpers.GetValue(this.value, memberName);
result = DynamicNode.Wrap(result);
return true;
}
return base.TryGetIndex(binder, indexes, out result);
}
public override bool TrySetIndex(SetIndexBinder binder, object[] indexes, object value)
{
if (indexes.Length == 1)
{
var memberName = indexes[0].ToString();
value = DynamicNode.Unwrap(value);
ReflectionHelpers.SetValue(this.value, memberName, value);
return true;
}
return base.TrySetIndex(binder, indexes, value);
}
public override bool TryGetMember(GetMemberBinder binder, out object result)
{
if (base.TryGetMember(binder, out result))
return true;
result = ReflectionHelpers.GetValue(this.value, binder.Name);
result = DynamicNode.Wrap(result);
return true;
}
public override bool TrySetMember(SetMemberBinder binder, object value)
{
ReflectionHelpers.SetValue(this.value, binder.Name, value);
return true;
}
public override bool TryInvokeMember(InvokeMemberBinder binder, object[] args, out object result)
{
if (binder.Name == "New")
{
var constructorArgs = new object[args.Length - 1];
Array.ConstrainedCopy(args, 1, constructorArgs, 0, constructorArgs.Length);
result = ReflectionHelpers.New(this.value, (string)args[0], constructorArgs);
}
else
{
result = ReflectionHelpers.Invoke(this.value, binder.Name, args);
}
result = DynamicNode.Wrap(result);
return true;
}
public override bool TryInvoke(InvokeBinder binder, object[] args, out object result)
{
IExpando self = this.value;
object[] constructorArgs = new object[0];
if (args.Length > 0)
{
self = (IExpando)DynamicNode.Unwrap(args[0]);
constructorArgs = new object[args.Length - 1];
Array.ConstrainedCopy(args, 1, constructorArgs, 0, constructorArgs.Length);
}
result = ReflectionHelpers.Call(this.value, self, constructorArgs);
result = DynamicNode.Wrap(result);
return true;
}
private static object Wrap(object value)
{
if (value != null && Marshal.IsComObject(value))
value = new DynamicNode((IExpando)value);
return value;
}
public static object Unwrap(object value)
{
DynamicNode node = value as DynamicNode;
if (node != null)
return node.value;
return value;
}
public IEnumerator GetEnumerator()
{
var members = this.value.GetProperties(BindingFlags.Public | BindingFlags.Instance);
var indexProperties = new List<Tuple<int, PropertyInfo>>();
var isArray = true;
foreach (var member in members)
{
int value = 0;
if (!int.TryParse(member.Name, out value))
{
isArray = false;
break;
}
var propertyMember = member as PropertyInfo;
if (propertyMember != null)
indexProperties.Add(Tuple.Create(value, propertyMember));
}
if (isArray)
{
indexProperties.Sort((left, right) => left.Item1.CompareTo(right.Item1));
foreach (var prop in indexProperties)
yield return prop.Item2.GetValue(this.value, null);
}
else
{
foreach (var member in members)
yield return member.Name;
}
}
#region IExpando
FieldInfo IExpando.AddField(string name)
{
return this.value.AddField(name);
}
MethodInfo IExpando.AddMethod(string name, Delegate method)
{
return this.value.AddMethod(name, method);
}
PropertyInfo IExpando.AddProperty(string name)
{
return this.value.AddProperty(name);
}
void IExpando.RemoveMember(MemberInfo m)
{
this.value.RemoveMember(m);
}
FieldInfo IReflect.GetField(string name, BindingFlags bindingAttr)
{
return this.value.GetField(name, bindingAttr);
}
FieldInfo[] IReflect.GetFields(BindingFlags bindingAttr)
{
return this.value.GetFields(bindingAttr);
}
MemberInfo[] IReflect.GetMember(string name, BindingFlags bindingAttr)
{
return this.value.GetMember(name, bindingAttr);
}
MemberInfo[] IReflect.GetMembers(BindingFlags bindingAttr)
{
return this.value.GetMembers(bindingAttr);
}
MethodInfo IReflect.GetMethod(string name, BindingFlags bindingAttr)
{
return this.value.GetMethod(name, bindingAttr);
}
MethodInfo IReflect.GetMethod(string name, BindingFlags bindingAttr, Binder binder, Type[] types, ParameterModifier[] modifiers)
{
return this.value.GetMethod(name, bindingAttr, binder, types, modifiers);
}
MethodInfo[] IReflect.GetMethods(BindingFlags bindingAttr)
{
return this.value.GetMethods(bindingAttr);
}
PropertyInfo[] IReflect.GetProperties(BindingFlags bindingAttr)
{
return this.value.GetProperties(bindingAttr);
}
PropertyInfo IReflect.GetProperty(string name, BindingFlags bindingAttr, Binder binder, Type returnType, Type[] types, ParameterModifier[] modifiers)
{
return this.value.GetProperty(name, bindingAttr, binder, returnType, types, modifiers);
}
PropertyInfo IReflect.GetProperty(string name, BindingFlags bindingAttr)
{
return this.value.GetProperty(name, bindingAttr);
}
object IReflect.InvokeMember(string name, BindingFlags invokeAttr, Binder binder, object target, object[] args, ParameterModifier[] modifiers, System.Globalization.CultureInfo culture, string[] namedParameters)
{
return this.value.InvokeMember(name, invokeAttr, binder, target, args, modifiers, culture, namedParameters);
}
Type IReflect.UnderlyingSystemType
{
get { return this.value.UnderlyingSystemType; }
}
#endregion
}
[ComVisible(true)]
public class ScriptObject : IReflect, IExpando
{
private readonly Type type;
private dynamic _constructor;
private dynamic _prototype;
public ScriptObject()
{
type = this.GetType();
}
[DispId(0)]
protected virtual object Invoke(object[] args)
{
return "ClrObject";
}
public dynamic constructor
{
get { return _constructor; }
set { this._constructor = value; }
}
public dynamic prototype
{
get { return _prototype; }
set { this._prototype = value; }
}
public string toString()
{
return "ClrObject";
}
#region IReflect Members
MethodInfo IReflect.GetMethod(string name, BindingFlags bindingAttr, Binder binder, Type[] types, ParameterModifier[] modifiers)
{
return type.GetMethod(name, bindingAttr, binder, types, modifiers);
}
MethodInfo IReflect.GetMethod(string name, BindingFlags bindingAttr)
{
return type.GetMethod(name, bindingAttr);
}
protected virtual MethodInfo[] GetMethods(BindingFlags bindingAttr)
{
return type.GetMethods(bindingAttr);
}
MethodInfo[] IReflect.GetMethods(BindingFlags bindingAttr)
{
return GetMethods(bindingAttr);
}
FieldInfo IReflect.GetField(string name, BindingFlags bindingAttr)
{
return type.GetField(name, bindingAttr);
}
FieldInfo[] IReflect.GetFields(BindingFlags bindingAttr)
{
return new FieldInfo[0]; // type.GetFields(bindingAttr);
}
PropertyInfo IReflect.GetProperty(string name, BindingFlags bindingAttr)
{
return type.GetProperty(name, bindingAttr);
}
PropertyInfo IReflect.GetProperty(string name, BindingFlags bindingAttr, Binder binder, Type returnType, Type[] types, ParameterModifier[] modifiers)
{
return type.GetProperty(name, bindingAttr, binder, returnType, types, modifiers);
}
protected virtual PropertyInfo[] GetProperties(BindingFlags bindingAttr)
{
return type.GetProperties(bindingAttr);
}
PropertyInfo[] IReflect.GetProperties(BindingFlags bindingAttr)
{
return GetProperties(bindingAttr);
}
MemberInfo[] IReflect.GetMember(string name, BindingFlags bindingAttr)
{
return type.GetMember(name, bindingAttr);
}
MemberInfo[] IReflect.GetMembers(BindingFlags bindingAttr)
{
return type.GetMembers(bindingAttr);
}
protected virtual object InvokeMember(string name, BindingFlags invokeAttr, Binder binder, object target, object[] args, ParameterModifier[] modifiers, CultureInfo culture, string[] namedParameters)
{
if (name == "[DISPID=0]")
{
return this.Invoke(args);
}
return type.InvokeMember(name, invokeAttr, binder, target, args, modifiers, culture, namedParameters);
}
object IReflect.InvokeMember(string name, BindingFlags invokeAttr, Binder binder, object target, object[] args, ParameterModifier[] modifiers, CultureInfo culture, string[] namedParameters)
{
return this.InvokeMember(name, invokeAttr, binder, target, args, modifiers, culture, namedParameters);
}
Type IReflect.UnderlyingSystemType
{
get { return type.UnderlyingSystemType; }
}
#endregion
#region IExpando Members
public FieldInfo AddField(string name)
{
throw new NotImplementedException();
}
public MethodInfo AddMethod(string name, Delegate method)
{
throw new NotImplementedException();
}
public PropertyInfo AddProperty(string name)
{
throw new NotImplementedException();
}
public void RemoveMember(MemberInfo m)
{
throw new NotImplementedException();
}
#endregion
}
public static class ReflectionHelpers
{
private const BindingFlags DefaultFlags = BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Static;
public static object New(this IExpando scope, string functionName, params object[] args)
{
var constructor = (IExpando)scope.GetValue(functionName);
var proto = constructor.GetValue("prototype");
var obj = (IExpando)scope.GetValue("Object");
var instance = (IExpando)obj.Invoke("create", new object[] { proto });
Call(constructor, instance, args);
return instance;
}
public static object Call(this IExpando function, IExpando scope, params object[] args)
{
object[] callArgs = new object[args.Length + 1];
callArgs[0] = scope;
Array.Copy(args, 0, callArgs, 1, args.Length);
return Invoke(function, "call", callArgs);
}
public static void SetValue(this IExpando instance, string propertyName, object value)
{
if (instance == null)
throw new ArgumentNullException("instance");
if (string.IsNullOrEmpty(propertyName))
throw new ArgumentException("Must specify a value.", "propertyName");
Invoke(instance, propertyName, InvokeFlags.DISPATCH_PROPERTYPUT, new object[] { value });
}
public static object GetValue(this IExpando instance, string propertyName)
{
return Invoke(instance, propertyName, InvokeFlags.DISPATCH_PROPERTYGET, new object[0]);
}
public static object Invoke(this IExpando instance, string functionName, object[] args)
{
if (instance == null)
throw new ArgumentNullException("instance");
if (string.IsNullOrEmpty(functionName))
throw new ArgumentException("Must specify a value.", "functionName");
return Invoke(instance, functionName, InvokeFlags.DISPATCH_METHOD, args);
}
private static object Invoke(IExpando instance, string functionName, InvokeFlags flags, object[] args)
{
try
{
args = args.Select(arg => DynamicNode.Unwrap(arg)).ToArray();
switch (flags)
{
case InvokeFlags.DISPATCH_METHOD:
var method = instance.GetMethod(functionName, DefaultFlags);
return method.Invoke(instance, args);
case InvokeFlags.DISPATCH_PROPERTYGET:
var getProp = instance.GetProperty(functionName, DefaultFlags);
return getProp.GetValue(instance, null);
case InvokeFlags.DISPATCH_PROPERTYPUT:
case InvokeFlags.DISPATCH_PROPERTYPUTREF:
var setProp = instance.GetProperty(functionName, DefaultFlags);
if (setProp == null)
setProp = instance.AddProperty(functionName);
setProp.SetValue(instance, args[0], null);
return null;
default:
throw new NotSupportedException();
}
}
catch (COMException comex)
{
switch ((uint)comex.ErrorCode)
{
// Unexpected script error. This will be handled by the IProcess.UnhandledException event
case 0x80020101:
return null;
default:
throw;
}
}
}
private enum InvokeFlags
{
DISPATCH_METHOD = 1,
DISPATCH_PROPERTYGET = 2,
DISPATCH_PROPERTYPUT = 4,
DISPATCH_PROPERTYPUTREF = 8,
}
}
Si può effettivamente attaccare .net oggetti nel documento in questo modo o tirare fuori oggetti e interagire con loro da .net. È anche possibile valutare js come stringhe e richiamare le funzioni .net. Ecco alcuni frammenti di codice di usi:
ottenere e impostare i membri di un oggetto js:
this.host.Window.eval(@" Foo = { }; ");
var foo = this.host.Window.Foo;
foo.B = 7.11;
Assert.Equal(7.11, foo.B);
chiamando js funzione da C#:
this.host.eval("function add(x, y) { return x + y; }");
var z = (int)this.host.Window.add(7, 11);
Assert.Equal(7 + 11, z);
inserimento di oggetti .NET in documenti e chiamando il suo membri da js:
this.host.Window.Custom2 = new Custom2();
this.host.Window.eval(@"
function test() {
return Custom2.Test().Value;
}");
bool success = this.host.Window.test();
Assert.True(success);
È possibile solo incollare oggetti che ereditano da Scrip tObject nel documento però (definito nel codeblock sopra). Beh, penso che tu possa mettere qualcosa lì dentro ma otterrai strani comportamenti se non implementano IReflect.
per caso potrei avere un campione del tuo codice? – Amir