假设我有以下枚举
[Flags]
enum Options
{
Option1 = 1 << 0,
Option2 = 1 << 1,
Option3 = 1 << 2
}
我要设置如下变量
var options = 0;
options |= Options.Option1;
options |= Options.Option3;
// now options should equal Option1 + Option3
// I then store that single value in the database
myDatabase.Options.Submit(options);
然后,我如何解析"选项"以获取原始值？
public List<Options> ParseOptions(Options options)
{
// Not sure how to parse the options.
}
我想PRIVAL从 syslog 条目中解析信息，但我无法理解所需的算法。
RFC5424说：
Priority 值的计算方法是首先将 Facility 编号乘以 8，然后加上 Severity 的数值。
有了这个，这就是我所理解的。
(X * 8) + y = [known number]
所以
If (X * 8) + Y = 134
// I happen to know that X = 16 and Y = 6
或者
If (X * 8) + Y = 78
// What are the values of X and Y?
那么解析这些信息的合适算法是什么？
我如何itemsToRemove只包含"bar one",并且itemsToAdd只包含"bar five"？
我正在尝试使用"除外",但显然我使用它不正确.
var oldList = new List<Foo>();
oldList.Add(new Foo(){ Bar = "bar one"});
oldList.Add(new Foo(){ Bar = "bar two"});
oldList.Add(new Foo(){ Bar = "bar three"});
oldList.Add(new Foo(){ Bar = "bar four"});
var newList = new List<Foo>();
newList.Add(new Foo(){ Bar = "bar two"});
newList.Add(new Foo(){ Bar = "bar three"});
newList.Add(new Foo(){ Bar = "bar four"});
newList.Add(new Foo(){ Bar = "bar five"});
var itemsToRemove = oldList.Except(newList); // should only contain "bar one"
var itemsToAdd = newList.Except(oldList); …我的计划需要:
一个.生成一个由0到9的20个随机整数的数组.搜索数字7的第一个匹配项(如果有),并在数组中报告其位置.
湾 重复计算部分a 1000次,并对数组中的每个位置报告数组中第一次出现7的位置在该位置的次数
但是每当我运行程序时,我都会得到奇怪的结果(每次都不同),例如:
有谁知道我的程序有什么问题？
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Week_6_Project_2
{
class Program
{
static int intArrayLength = 20;
static int[] resultsArray = new int[intArrayLength];
public static Array generateRandomArray() {
int[] randomNumberArray = new int[intArrayLength];
Random random = new Random();
int popcounter = 0;
while (popcounter < intArrayLength) {
randomNumberArray[popcounter] = random.Next(0, 10);
popcounter += 1;
}
return randomNumberArray;
}
public static void searchForSevens()
{
int counter = …假设我有一个课程如下
public class Foo
{
public Foo(string someTitle, IFooService fooService)
{
// do stuff
}
}
我知道我可以使用DI和autofac这样实例化它
public class Bar
{
public Bar(Func < string, IFooService, Foo > foo, IFooService fooService)
{
var foo = foo("some string", fooService);
}
}
但我想知道是否有任何方法Bar可以不知道任何事情IFooService？我不想为了满足func而将IFooService注入Bar.
基本上是这样的
// pseudo code - don't use
public class Bar
{
public Bar(Func < string, Foo > foo)
{
var foo = foo("some string");
}
}
我在我的应用程序中真正想做的是删除所有服务位置实例,并完全依赖依赖注入.
我有一个需要验证的集合的类。集合上的泛型采用一个接口，可以将不同的类型添加到集合中。
创建支持多态性的 FluentValidation 验证器的最简洁路径是什么？
public interface IWizardStep {}
public class WizardOne : IWizardStep
{
public string Model { get; set; }
}
public class WizardTwo : IWizardStep
{
public string FirstName { get; set; }
}
public class Wizard
{
public Wizard()
{
var w1 = new WizardOne();
var w2 = new WizardTwo();
Steps = new List<IWizardStep>
{
w1,
w2
};
}
public IList<IWizardStep> Steps { get; set; }
}
public class WizardValidator : AbstractValidator<Wizard>
{
public WizardValidator()
{
RuleFor(x …你认为什么是最img.Group.Contents简洁的方法来循环并写出galleryImage的值.??? 对象？
galleryImage.TinyImage = new myModel.Image._Img();
galleryImage.TinyImage.Url = img.Group.Contents[0].Url;
galleryImage.TinyImage.FileSize = img.Group.Contents[0].FileSize;
galleryImage.TinyImage.Type = img.Group.Contents[0].Type;
galleryImage.TinyImage.Medium = img.Group.Contents[0].Medium;
galleryImage.TinyImage.Width = img.Group.Contents[0].Width;
galleryImage.TinyImage.Height = img.Group.Contents[0].Height;
galleryImage.TinyImage.Hash = img.Group.Contents[0].Hash;
galleryImage.Thumbnail.Url = img.Group.Contents[1].Url;
galleryImage.Thumbnail.FileSize = img.Group.Contents[1].FileSize;
galleryImage.Thumbnail.Type = img.Group.Contents[1].Type;
galleryImage.Thumbnail.Medium = img.Group.Contents[1].Medium;
galleryImage.Thumbnail.Width = img.Group.Contents[1].Width;
galleryImage.Thumbnail.Height = img.Group.Contents[1].Height;
galleryImage.Thumbnail.Hash = img.Group.Contents[1].Hash;
galleryImage.SmallImage.Url = img.Group.Contents[2].Url;
galleryImage.SmallImage.FileSize = img.Group.Contents[2].FileSize;
galleryImage.SmallImage.Type = img.Group.Contents[2].Type;
galleryImage.SmallImage.Medium = img.Group.Contents[2].Medium;
galleryImage.SmallImage.Width = img.Group.Contents[2].Width;
galleryImage.SmallImage.Height = img.Group.Contents[2].Height;
galleryImage.SmallImage.Hash = img.Group.Contents[2].Hash;
galleryImage.MediumImage.Url = img.Group.Contents[3].Url;
galleryImage.MediumImage.FileSize = img.Group.Contents[3].FileSize;
galleryImage.MediumImage.Type = img.Group.Contents[3].Type; …我无法在我的连接字符串中使用密码,密码中包含"&",我的服务会抛出500内部服务器错误.
当我从密码中删除"&"时,服务运行但显然我不会连接到数据库.
例如
< add name="conn" connectionString="Data Source=DFF1234;Initial Catalog=PONJ1;User Id=PPID1;Password=POu&3mjl@sdRTYu" providerName="System.Data.SqlClient" >
string str1 = "12/13/2010 12:12:00 AM ";