本文整理匯總了C#中System.Dynamic.GetMemberBinder.GetUpdateExpression方法的典型用法代碼示例。如果您正苦於以下問題：C# GetMemberBinder.GetUpdateExpression方法的具體用法？C# GetMemberBinder.GetUpdateExpression怎麽用？C# GetMemberBinder.GetUpdateExpression使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類System.Dynamic.GetMemberBinder的用法示例。
在下文中一共展示了GetMemberBinder.GetUpdateExpression方法的1個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的C#代碼示例。
示例1: typeof
public override DynamicMetaObject BindGetMember
(GetMemberBinder binder)
{
var self = this.Expression;
var bag = (FastNBag)base.Value;
int index = bag.GetFastIndex(binder.Name);
Expression target;
// If match found in fast array:
if (index != -1)
{
// Fetch result from fast array.
target =
Expression.Call(
Expression.Convert(self, typeof(FastNBag)),
typeof(FastNBag).GetMethod("GetFastValue"),
Expression.Constant(index)
);
}
// Else, if no match found in fast array, but fast array is full:
else if (bag.fastTable.Count == bag.fastCount)
{
// Fetch result from dictionary.
var keyExpr = Expression.Constant(binder.Name);
var valueExpr = Expression.Variable(typeof(object));
var dictCheckExpr =
Expression.Call(
Expression.Convert(self, typeof(FastNBag)),
typeof(FastNBag).GetMethod("TryGetValue"),
keyExpr,
valueExpr
);
var dictFailExpr =
Expression.Block(
binder.FallbackGetMember(this).Expression,
Expression.Default(typeof(object))
);
target =
Expression.Block(
new[] { valueExpr },
Expression.Condition(
dictCheckExpr,
valueExpr,
dictFailExpr
)
);
}
// Else, no match found in fast array, fast array is not yet full:
else
{
// Fail binding, but only until fast array is updated.
var versionCheckExpr =
Expression.Call(
Expression.Convert(self, typeof(FastNBag)),
typeof(FastNBag).GetMethod("CheckVersion"),
Expression.Constant(bag.Version)
);
var versionMatchExpr =
binder.FallbackGetMember(this).Expression;
var updateExpr =
binder.GetUpdateExpression(versionMatchExpr.Type);
target =
Expression.Condition(
versionCheckExpr,
versionMatchExpr,
updateExpr
);
}
var restrictions = BindingRestrictions
.GetInstanceRestriction(self, bag);
return new DynamicMetaObject(target, restrictions);
}