nullable

相关标签：javascript jquery android 多少钱 iPhone

C# Nullable value type generates garbage?

Does a Nullable value type generate garbage? For example: A struct is not created on the heap but on the stack because it\'s a value type.[详细]

2023-03-29 05:52 分类：问答
Why can the as operator be used with Nullable<T>?

According to the documentation of the as operator, as \"is used to perform certain types of conversions between compatible reference types\".Since Nullable is actually a value type, I would expect as[详细]

2023-03-28 20:25 分类：问答
Can I force an expression to be used with a non-nullable parameter?

I\'m not sure how to explain this, so I\'m gonna show you some code first and explain what it does. Extension Filter: receives a parameter expression and a special type of filter I\'ve built for my a[详细]

2023-03-28 19:59 分类：问答
How to create a Nullable<T> from a Type variable?

I\'m working with expressions and I need a method which receives an object of some type (currently unknown). Something like this:[详细]

2023-03-28 19:56 分类：问答
Spark null operator not working with nullable types

I h开发者_如何学Pythonave a nullable DateTime I want to show in ShortDate format if it has a value, but I can\'t get it right. I am trying to use the null operator ($!{}) here.[详细]

2023-03-28 06:18 分类：问答
Why int can't be null? How does nullable int (int?) work in C#?

I am new to C# and just learned that objec开发者_开发知识库ts can be null in C# but int can\'t.[详细]

2023-03-26 14:20 分类：问答
Why GetType returns System.Int32 instead of Nullable<Int32>? [duplicate]

This question already has answers here: Nullable type is not a nullable type? (4 answers) Closed 8 years ago.[详细]

2023-03-25 20:54 分类：问答
C# ASP.NET MVC 2 basic routing

I\'m quite new to ASP.NET and C# and I\'m having some issues with my routing. Was hoping someone would be so kind to help me out.[详细]

2023-03-25 16:30 分类：问答
Make a column nullable in DB2 when Data Capture is enabled

I\'m usi开发者_如何转开发ng db2 version 9.7* and it seems impossible to make a NOT NULL column nullable in any straightforward way.[详细]

2023-03-24 21:19 分类：问答
Checkbox for nullable boolean

My model has a boolean that has to be nullable public bool? Foo { get; set; } so in my Razor cshtml I have @Html.CheckBoxFor(m => m.Foo)[详细]

2023-03-23 21:21 分类：问答