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public static Dynamic ( CallSiteBinder binder, Type returnType, |
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| binder | CallSiteBinder | The runtime binder for the dynamic operation. |
| returnType | Type | The result type of the dynamic expression. |
| arg0 | The first argument to the dynamic operation. | |
| arg1 | The second argument to the dynamic operation. | |
| arg2 | The third argument to the dynamic operation. | |
| return | ||
public static DynamicExpression Dynamic(CallSiteBinder binder, Type returnType, Expression arg0, Expression arg1, Expression arg2)
{
ContractUtils.RequiresNotNull(binder, nameof(binder));
ValidateDynamicArgument(arg0, nameof(arg0));
ValidateDynamicArgument(arg1, nameof(arg1));
ValidateDynamicArgument(arg2, nameof(arg2));
DelegateHelpers.TypeInfo info = DelegateHelpers.GetNextTypeInfo(
returnType,
DelegateHelpers.GetNextTypeInfo(
arg2.Type,
DelegateHelpers.GetNextTypeInfo(
arg1.Type,
DelegateHelpers.GetNextTypeInfo(
arg0.Type,
DelegateHelpers.NextTypeInfo(typeof(CallSite))
)
)
)
);
Type delegateType = info.DelegateType;
if (delegateType == null)
{
delegateType = info.MakeDelegateType(returnType, arg0, arg1, arg2);
}
return DynamicExpression.Make(returnType, delegateType, binder, arg0, arg1, arg2);
}
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Expression::Dynamic ( CallSiteBinder binder, Type returnType ) : |
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Expression::Dynamic ( CallSiteBinder binder, Type returnType, |
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Expression::Dynamic ( CallSiteBinder binder, Type returnType, |
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Expression::Dynamic ( CallSiteBinder binder, Type returnType, |
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Expression::Dynamic ( CallSiteBinder binder, Type returnType, IEnumerable |
private object CastResult(object result, Type targetType)
{
if (result == null || result == DependencyProperty.UnsetValue || result == System.Windows.Data.Binding.DoNothing || targetType == null || targetType == typeof(object))
{
return(result);
}
if (targetType == typeof(string))
{
return(result.ToString());
}
Func <object, object> cast;
if (!castFunctions.TryGetValue(targetType, out cast))
{
ParameterExpression par = Expression.Parameter(typeof(object));
cast = Expression.Lambda <Func <object, object> >(Expression.Convert(Expression.Dynamic(Binder.Convert(CSharpBinderFlags.ConvertExplicit, targetType, typeof(object)), targetType, par), typeof(object)), par).Compile();
castFunctions.TryAdd(targetType, cast);
}
if (cast != null)
{
try
{
result = cast(result);
}
catch
{
castFunctions[targetType] = null;
}
}
return(result);
}