@addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers
{
"dependencies": {
//same as before
"Microsoft.AspNetCore.Mvc.TagHelpers": "1.0.0",
"Microsoft.AspNetCore.Razor.Runtime": "1.0.0",
"Microsoft.AspNetCore.Razor.Tools": {
"version": "1.0.0-preview2-final",
"type": "build"
}
},
"tools": {
//same as before
"Microsoft.AspNetCore.Razor.Tools": "1.0.0-preview2-final"
}
} <a asp-controller="Home" asp-action="Index" asp-route-id="123">Home</a>
<a asp-route="login">Login</a>
<a asp-controller="Account" asp-action="Register" asp-protocol="https" asp-host="asepecificdomain.com" asp-fragment="fragment">Register</a>
| Tag Helper | HTML Helper |
<label asp-for="Email" class="col-md-2 control-label"></label> | @Html.LabelFor(m => m.Email, new { @class = "col-md-2 control-label" }) |
<a asp-controller="MyController" asp-action="MyAction" class="my-css-classname" my-attr="my-attribute">Click me</a> | @Html.ActionLink("Click me", "MyController", "MyAction",
{ @class="my-css-classname", data_my_attr="my-attribute"}) |
<input asp-for="FirstName" style="width:100px;"/> | @Html.TextBox("FirstName", Model.FirstName, new { style = "width: 100px;" }) |
<input asp-for="Email" class="form-control" /> | @Html.TextBoxFor(m => m.Email, new { @class = "form-control" }) |
<input asp-for="Password" class="form-control" /> | @Html.PasswordFor(m => m.Password, new { @class = "form-control" }) |
<input asp-for="UserName" class="form-control" /> | @Html.EditorFor(l => l.UserName,
new { htmlAttributes = new { @class = "form-control" } }) |
<form asp-controller="Account" asp-action="Register" method="post" class="form-horizontal" role="form"> | @using (Html.BeginForm("Register", "Account",
FormMethod.Post, new { @class = "form-horizontal", role = "form" }))
{
@Html.AntiForgeryToken() |
<span asp-validation-for="UserName" class="text-danger"></span> | @Html.ValidationMessageFor(m => m.UserName, "",
new { @class = "text-danger" }) |
<div asp-validation-summary="ValidationSummary.All" class="text-danger"></div> | @Html.ValidationSummary("", new { @class = "text-danger" }) |
<form asp-controller="Account"
asp-action="Login"
asp-route-returnurl="@ViewBag.ReturnUrl"
method="post" >
</form> <form action="/Account/Login?returnurl=%2FHome%2FAbout" method="post">
<form asp-route="login"
asp-route-returnurl="@ViewBag.ReturnUrl"
method="post" >
</form> <script asp-src-include="~/app/**/*.js"></script>
<script src="/app/app.js"></script> <script src="/app/controllers/controller1.js"></script> <script src="/app/controllers/controller2.js"></script> <script src="/app/controllers/controller3.js"></script> <script src="/app/controllers/controller4.js"></script> <script src="/app/services/service1.js"></script> <script src="/app/services/service2.js"></script>
<script asp-src-include="~/app/**/*.js"
asp-src-exclude="~/app/services/**/*.js">
</script> <link rel="stylesheet" href="//ajax.aspnetcdn.com/ajax/bootstrap/3.0.0/css/bootstrap.min.css"
asp-fallback-href="~/lib/bootstrap/css/bootstrap.min.css"
asp-fallback-test-class="hidden"
asp-fallback-test-property="visibility"
asp-fallback-test-value="hidden" />
<script src="//ajax.aspnetcdn.com/ajax/bootstrap/3.0.0/bootstrap.min.js"
asp-fallback-src="~/lib/bootstrap/js/bootstrap.min.js"
asp-fallback-test="window.jQuery">
</script> <link rel="stylesheet" href="~/css/site.min.css" asp-file-version="true"/>
<link rel="stylesheet" href="/css/site.min.css?v=UdxKHVNJA5vb1EsG9O9uURFDfEE3j1E3DgwL6NiDGMc" />
<img src="~/images/logo.png"
alt="company logo"
asp-file-version="true" /> <img src="/images/logo.png?v=W2F5D366_nQ2fQqUk3URdgWy2ZekXjHzHJaY5yaiOOk"
alt="company logo"/> <environment names="Development"> <link rel="stylesheet" href="~/css/site1.css" /> <link rel="stylesheet" href="~/css/site2.css" /> </environment> <environment names="Staging,Production"> <link rel="stylesheet" href="~/css/site.min.css" asp-file-version="true"/> </environment>
public class CustomerViewModel
{
public string Vehicle { get; set; }
public List<SelectListItem> Vehicles { get; set; } <select asp-for="Vehicle" asp-items="Model.Vehicles"> </select>
اگرچه شیئ Date در جاوااسکریپت ویژگیهای متنوعی برای کارکردن با تاریخ و زمان در اختیار برنامهنویسان قرار میدهد، ولی توسعهی نرمافزارهای تحت وب تنها با استفاده از این ویژگیها گاهی مشکل و ناهموار به نظر میرسد.
<ItemGroup> <FrameworkReference Include="Microsoft.AspNetCore.App" /> </ItemGroup>
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFramework>netcoreapp3.0</TargetFramework>
</PropertyGroup>
<ItemGroup>
<FrameworkReference Include="Microsoft.AspNetCore.App" />
</ItemGroup>
</Project> public string TestNoneAsync()
{
var webClient = new WebClient();
return webClient.DownloadString("http://www.google.com");
} public void TestAsync()
{
var webClient = new WebClient();
webClient.DownloadStringAsync(new Uri("http://www.google.com"));
webClient.DownloadStringCompleted += webClientDownloadStringCompleted;
}
void webClientDownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)
{
// use e.Result
} using System;
using System.Linq;
using System.Net;
using System.Windows.Forms;
namespace Async02
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void btnGetInfo_Click(object sender, EventArgs e)
{
var req = (HttpWebRequest)WebRequest.Create("http://www.google.com");
req.Method = "HEAD";
req.BeginGetResponse(
asyncResult =>
{
var resp = (HttpWebResponse)req.EndGetResponse(asyncResult);
var headersText = formatHeaders(resp.Headers);
txtResults.Text = headersText;
}, null);
}
private string formatHeaders(WebHeaderCollection headers)
{
var headerString = headers.Keys.Cast<string>()
.Select(header => string.Format("{0}:{1}", header, headers[header]));
return string.Join(Environment.NewLine, headerString.ToArray());
}
}
} An exception of type 'System.InvalidOperationException' occurred in System.Windows.Forms.dll but was not handled in user code Additional information: Cross-thread operation not valid: Control 'txtResults' accessed from a thread other than the thread it was created on.
private void btnGetInfo_Click(object sender, EventArgs e)
{
var sync = SynchronizationContext.Current;
var req = (HttpWebRequest)WebRequest.Create("http://www.google.com");
req.Method = "HEAD";
req.BeginGetResponse(
asyncResult =>
{
var resp = (HttpWebResponse)req.EndGetResponse(asyncResult);
var headersText = formatHeaders(resp.Headers);
sync.Post(delegate { txtResults.Text = headersText; }, null);
}, null);
} 
using System;
using System.Threading.Tasks;
namespace Async01
{
public class AsyncExample
{
public async Task DoWorkAsync(int parameter)
{
await Task.Delay(parameter);
Console.WriteLine(parameter);
}
}
} public async Task<double> GetNumberAsync()
{
var generator = new Random();
await Task.Delay(generator.Next(1000));
return generator.NextDouble();
} public async Task<double> GetSumAsync()
{
var leftOperand = await GetNumberAsync();
var rightOperand = await GetNumberAsync();
return leftOperand + rightOperand;
} public async Task<double> GetProductOfSumAsync()
{
var leftOperand = GetSumAsync();
var rightOperand = GetSumAsync();
return await leftOperand * await rightOperand;
} Operator '*' cannot be applied to operands of type 'System.Threading.Tasks.Task<double>' and 'System.Threading.Tasks.Task<double>'
public async Task<string> DownloadAsync()
{
var webClient = new WebClient();
return await webClient.DownloadStringTaskAsync("http://www.google.com");
} public void TestDownloadAsync()
{
Debug.WriteLine("Before DownloadAsync");
DownloadAsync();
Debug.WriteLine("After DownloadAsync");
} Before DownloadAsync After DownloadAsync
PM> Install-Package Microsoft.Bcl.Async
