本文整理汇总了C#中System.Linq.Expressions.MemberExpression.Update方法的典型用法代码示例。如果您正苦于以下问题：C# MemberExpression.Update方法的具体用法？C# MemberExpression.Update怎么用？C# MemberExpression.Update使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类System.Linq.Expressions.MemberExpression的用法示例。
在下文中一共展示了MemberExpression.Update方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: VisitMember
protected override Expression VisitMember(MemberExpression memberExpression)
{
var newExpression = Visit(memberExpression.Expression);
var subQueryExpression = newExpression as SubQueryExpression;
var subSelector = subQueryExpression?.QueryModel.SelectClause.Selector;
if (subSelector is QuerySourceReferenceExpression
|| subSelector is SubQueryExpression)
{
var subQueryModel = subQueryExpression.QueryModel;
subQueryModel.SelectClause.Selector = VisitMember(memberExpression.Update(subSelector));
subQueryModel.ResultTypeOverride = subQueryModel.SelectClause.Selector.Type;
return new SubQueryExpression(subQueryModel);
}
return memberExpression.Update(newExpression);
}示例2: VisitMember
protected override Expression VisitMember(MemberExpression m)
{
Expression source = this.Visit(m.Expression);
switch (source.NodeType)
{
case ExpressionType.Call:
MethodCallExpression call = (MethodCallExpression)source;
if (call != null && call.Method.Name == "NewDefaultProjectedObject")
{
var bindings = ((ConstantExpression)call.Arguments[0]).Value as ReadOnlyCollection<MemberBinding>;
for (int i = 0, n = bindings.Count; i < n; i++)
{
MemberAssignment assign = bindings[i] as MemberAssignment;
if (assign != null && MembersMatch(assign.Member, m.Member))
{
return assign.Expression;
}
}
}
break;
case ExpressionType.MemberInit:
MemberInitExpression min = (MemberInitExpression)source;
for (int i = 0, n = min.Bindings.Count; i < n; i++)
{
MemberAssignment assign = min.Bindings[i] as MemberAssignment;
if (assign != null && MembersMatch(assign.Member, m.Member))
{
return assign.Expression;
}
}
break;
case ExpressionType.New:
NewExpression nex = (NewExpression)source;
if (nex.Members != null)
{
for (int i = 0, n = nex.Members.Count; i < n; i++)
{
if (MembersMatch(nex.Members[i], m.Member))
{
return nex.Arguments[i];
}
}
}
break;
}
return m.Update(source);
}