nullable

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Embed a test for null in a single LINQ expression

Let\'s start with a simple example class: public class Foo { public DateTime Date { get; set; } public decimal Price { get; set; }[详细]

2023-04-12 06:17 分类：问答
"Save changes is not permitted" when changing an existing column to be nullable

I\'ve got a SQL Database Table, which has 35 existing records. One of the fields in this table is called Name, nvarchar(100), not null[详细]

2023-04-12 02:53 分类：问答
Error Message: "Cannot convert type 'string?' to 'string' "

I have this code: //Return nul开发者_如何学Gol if the extension doesn\'t have the value, returns the value if it does.[详细]

2023-04-11 07:09 分类：问答
REST with nullable types?

I\'ve hit a brickwall. My REST implementation won\'t accept Nullable values. [OperationContract] [WebInvoke(ResponseFormat = WebMessageFormat.Json, 开发者_开发百科UriTemplate = \"/Transactions?AccNo=[详细]

2023-04-11 03:05 分类：问答
Best way to represent Nullable member in C++? [duplicate]

This question already has answers here: Closed 11 years ago. Possible Duplicate: Nullable values in C++ What is the best way to represent nullable member in C++?[详细]

2023-04-10 18:01 分类：问答
Why can't I write Nullable<Nullable<int>>?

The definition of Nullable<T> is: [SerializableAttribute] public struct Nullable<T> where T : struct开发者_StackOverflow中文版, new()[详细]

2023-04-09 02:14 分类：问答
JPA Nullable JoinColumn

I have an entity: public class Foo { @Id @GeneratedValue private Long id; private String username; @ManyToOne(cascade = { CascadeType.MERGE }, fetch = FetchType.LAZY, optional = true)[详细]

2023-04-08 09:55 分类：问答
Object null-ness check in Java

Which one is recommended and to be used to check the Object null-ness? null != Object 开发者_运维百科or[详细]

2023-04-07 23:34 分类：问答
Default non indexer properties in C#

How can you create a default - non indexer - property in C#? What I mean by this is I can see that I can create indexer default properties as illustrated on this MSDN page.[详细]

2023-04-07 11:11 分类：问答
Nullable DateTime, EditorTemplates, JQ UI DatePicker

My intent was to apply the JQuery UI Datepicker to my entire site by creating an EditorTemplate as per this post ASP.NET MVC 2 Templates[详细]

2023-04-05 20:35 分类：问答