This project will demonstrate how to Use Query String in ASP.NET Core MVC
LearnASPNETCoreMVCWithRealApps
Controllers
Views
Demo
Index.cshtml
Demo2.cshtml
Demo3.cshtml
Demo4.cshtml
_ViewImports.cshtml
Startup.cs
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Configuration;
namespace LearnASPNETCoreMVCWithRealApps.Controllers
{
[Route("demo")]
public class DemoController : Controller
{
[Route("")]
[Route("index")]
[Route("~/")]
public IActionResult Index()
{
return View();
}
[Route("demo2")]
public IActionResult Demo2([FromQuery(Name = "id")] string id)
{
ViewBag.id = id;
return View("Demo2");
}
[Route("demo3")]
public IActionResult Demo3([FromQuery(Name = "id1")] int id1, [FromQuery(Name = "id2")] string id2)
{
ViewBag.id1 = id1;
ViewBag.id2 = id2;
return View("Demo3");
}
[Route("demo4")]
public IActionResult Demo4()
{
var id1 = int.Parse(HttpContext.Request.Query["id1"].ToString());
var id2 = HttpContext.Request.Query["id2"].ToString();
ViewBag.id1 = id1;
ViewBag.id2 = id2;
return View("Demo4");
}
}
}
@{
Layout = null;
}
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title>Index</title>
</head>
<body>
<h3>Index View</h3>
<a asp-controller="demo" asp-action="demo2" asp-route-id="123">Demo 2</a>
<br />
<a asp-controller="demo" asp-action="demo3" asp-route-id1="123" asp-route-id2="p01">Demo 3</a>
<br />
<a asp-controller="demo" asp-action="demo4" asp-route-id1="123" asp-route-id2="p01">Demo 4</a>
</body>
</html>
@{
Layout = null;
}
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title>Demo 2</title>
</head>
<body>
<h3>Demo 2 View</h3>
Id: @ViewBag.id
</body>
</html>
@{
Layout = null;
}
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title>Demo 3</title>
</head>
<body>
<h3>Demo 3 View</h3>
Id 1: @ViewBag.id1
<br />
Id 2: @ViewBag.id2
</body>
</html>
@{
Layout = null;
}
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title>Demo 4</title>
</head>
<body>
<h3>Demo 4 View</h3>
Id 1: @ViewBag.id1
<br />
Id 2: @ViewBag.id2
</body>
</html>
@addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.DependencyInjection;
namespace LearnASPNETCoreMVCWithRealApps
{
public class Startup
{
public void ConfigureServices(IServiceCollection services)
{
services.AddMvc();
}
public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
app.UseStaticFiles();
app.UseMvc(routes =>
{
routes.MapRoute(
name: "default",
template: "{controller=Demo}/{action=Index}/{id?}");
});
}
}
}
Screenshots
