在ASP.NET Core中,它很容易从控制器访问您的内存缓存
在你的创业公司中你添加:
public void ConfigureServices(IServiceCollection services)
{
services.AddMemoryCache();
}
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然后从你的控制器
[Route("api/[controller]")]
public class MyExampleController : Controller
{
private IMemoryCache _cache;
public MyExampleController(IMemoryCache memoryCache)
{
_cache = memoryCache;
}
[HttpGet("{id}", Name = "DoStuff")]
public string Get(string id)
{
var cacheEntryOptions = new MemoryCacheEntryOptions().SetAbsoluteExpiration(TimeSpan.FromHours(1));
_cache.Set("key", "value", cacheEntryOptions);
}
}
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但是,如何在控制器外部访问相同的内存缓存.例如.我有一个由HangFire发起的计划任务,如何从我的代码中通过HangFire计划任务访问内存缓存?
public class ScheduledStuff
{
public void RunScheduledTasks()
{
//want to access the same memorycache here ...
}
}
Run Code Online (Sandbox Code Playgroud) 当您没有要使用的类名或ID时,找不到使用AngleSharp进行解析的许多示例.
HTML
<span><a href="google.com" title="Google"><span class="icon icon_none"></span></a></span>
<span><a href="bing.com" title="Bing"><span class="icon icon_none"></span></a></span>
<span><a href="yahoo.com" title="Yahoo"><span class="icon icon_none"></span></a></span>
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我想从任何<a>标题= Bing的标签中找到href
在Python BeautifulSoup我会用
item_needed = a_row.find('a', {'title': 'Bing'})
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然后抓住href属性
或jQuery
a[title='Bing']
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但是,我坚持使用AngleSharp,例如.以下示例 https://github.com/AngleSharp/AngleSharp/wiki/Examples#getting-certain-elements
c#AngleSharp
var parser = new AngleSharp.Parser.Html.HtmlParser();
var document = parser.Parse(@"<span><a href=""google.com"" title=""Google""><span class=""icon icon_none""></span></a></span>< span >< a href = ""bing.com"" title = ""Bing"" >< span class=""icon icon_none""></span></a></span><span><a href = ""yahoo.com"" title=""Yahoo""><span class=""icon icon_none""></span></a></span>");
//Do something with LINQ
var blueListItemsLinq = document.All.Where(m => m.LocalName == "a" && //stuck);
Run Code Online (Sandbox Code Playgroud) 在这件事上我一直在用头撞墙。我有以下数据(有点像键值对),我需要将设置命名为列而不是行
let settings = datatable (Location:int , SettingName:string, SettingValue:string)
[1, "PaperSize", "A4",
1, "Orientation", "Vertical",
1, "Colour", "False",
2, "PaperSize", "A3",
2, "Orientation", "Vertical",
2, "Colour", "False",
3, "PaperSize", "A4",
3, "Orientation", "Horizontal",
3, "Colour", "True"];
settings
| evaluate pivot(SettingName)
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我期望 3 行,每个位置一行,以及每个设置(纸张大小、方向、颜色)和位置的一列。但我最终得到了九行和没有多大意义的数据。我想要得到的输出是:
+----------+-----------+-------------+--------+
| Location | PaperSize | Orientation | Colour |
+----------+-----------+-------------+--------+
| 1 | A4 | Vertical | False |
| 2 | A3 | Vertical | False |
| 3 | A4 | Horizontal | True …Run Code Online (Sandbox Code Playgroud) c# ×2
.net-core ×1
anglesharp ×1
asp.net ×1
asp.net-core ×1
html-parsing ×1
kql ×1
memorycache ×1