Chuck Lu

摘要： How do you handle a ComboBox SelectionChanged in MVVM? For those doing pure MVVM, how do you handle a ComboBox SelectionChanged event without revertin 阅读全文

摘要： How to delete an object by id with entity framework It seems to me that I have to retrieve an object before I delete it with entity framework like bel 阅读全文

摘要： Like Operator in Entity Framework? 回答1 This is an old post now, but for anyone looking for the answer, this link should help. Go to this answer if you 阅读全文

摘要： https://www.sqlservercentral.com/forums/topic/charindex-is-not-case-sensitive SELECT CHARINDEX('x', 'X') 这个不区分大小写 下面这个会区分大小写 SELECT CHARINDEX('x' coll 阅读全文

摘要： What do two question marks together mean in C#? Ran across this line of code: FormsAuth = formsAuth ?? new FormsAuthenticationWrapper(); What do the t 阅读全文

摘要： How to change your Twitter username Your username –– also known as your handle –– begins with the “@” symbol, is unique to your account, and appears i 阅读全文

摘要： Extend IQueryable<T> Where() as OR instead of AND relationship 回答2 Use PredicateBuilder<T>. It's probably what you want. Dynamically Composing Express 阅读全文

摘要： 一道微分方程应用题中的“微”妙解答 首先，设导弹的位置为 (x,y) ,由简单的物理及几何知识我们可以列出以下微分方程组 然后......然后怎么解呢？ 我们发现这是一个关于 、、x、y、t 的三元微分方程组，这是符合实际的，由于 、x、y 都分别是 t 的函数，我们只需要分别解出 、x、y 关于  阅读全文

摘要： WPF binding not updating the view 回答1 You need to implement INotifyPropertyChanged in your ViewModel order to notify the View that the property has ch 阅读全文

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