大约有 4,829 项符合查询结果（耗时：0.0214秒） [XML]
Control cannot fall through from one case label
...lines under case "SearchBooks": have been executed, which isn't allowed in C#.
By adding the break statements at the end of each case, the program exits each case after it's done, for whichever value of searchType.
share
...
How to add System.Windows.Interactivity to project?
...ression/2010/interactions with http://schemas.microsoft.com/xaml/behaviors
C# files – replace the usings in c# files “Microsoft.Xaml.Interactivity” and “Microsoft.Xaml.Interactions” with “Microsoft.Xaml.Behaviors”
...
The cast to value type 'Int32' failed because the materialized value is null
... case, where there might be no elements and sql's SUM returns null whereas c# expect 0.
A more general approach is to use ?? which will be translated to COALESCE whenever there is a risk that the generated SQL returns an unexpected null:
var creditsSum = (from u in context.User
join ...
Convert System.Drawing.Color to RGB and Hex Value
Using C# I was trying to develop the following two. The way I am doing it may have some problem and need your kind advice. In addition, I dont know whether there is any existing method to do the same.
...
JavaScriptSerializer - JSON serialization of enum as string
...
Add the below to your global.asax for JSON serialization of c# enum as string
HttpConfiguration config = GlobalConfiguration.Configuration;
config.Formatters.JsonFormatter.SerializerSettings.Formatting =
Newtonsoft.Json.Formatting.Indented;
...
How to play a sound in C#, .NET
I have a Windows application written in C#/.NET.
7 Answers
7
...
Nullable type as a generic parameter possible?
...rk at all with reference types (e.g. GetValueOrNull<string>) because C# doesn't seem to like Nullable<(ref type)> like "string?". Robert C Barth & James Jones's solutions, below, seem much better to me if that's your need.
– bacar
Jul 28 '11 at ...
Are getters and setters poor design? Contradictory advice seen [duplicate]
...
what about in a language like c# or actionscript, where get and set are part of syntax? isAlive could just have a getter but not a setter.
– Iain
Jul 7 '09 at 11:07
...
Max or Default?
...yField = value _
Select CType(y.MyCounter, Integer?)).Max
Or in C#:
var x = (from y in context.MyTable
where y.MyField == value
select (int?)y.MyCounter).Max();
share
|
...
How to check if IEnumerable is null or empty?
...
@Mormegil Why? extension methods finally give C# some capability to work with nulls, which other languages (like Ruby) completely take for granted.
– Matt Greer
Feb 18 '11 at 22:54
...