我们在 说到了HTTP请求的URL查询参数，这一节我们讲解一下在ASP.NET Core中如何优雅的拼接字符串，来提升我们代码的可读性。我们在这里会用到一个QueryString对象，这是一个C#中的结构体类型。
var app = WebApplication.Create();app.Run(async context =>{var dicts = new Dictionary<string, string>(){[] = "001",[] = "桂兵兵",[] = "1986/08/30",[] = Guid.NewGuid().ToString(),[] = "Bill Gui",[] = "10 * 5 = 50"};var queryString = QueryString.Create(dicts);context.Response.Headers.Append("Content-Type", "text/html;charset=utf-8");await context.Response.WriteAsync($@"<html><head><link rel=""stylesheet"" href=""https://cdnjs.cloudflare.com/ajax/libs/bulma/0.7.5/css/bulma.css"" /></head><body class=""content""><div class=""container""><h1>使用 QueryString.Create 创建编码的URL查询字符串</h1><strong>Input</strong>");await context.Response.WriteAsync("<ul>");foreach (var k in dicts){await context.Response.WriteAsync($"<li>{k.Key} = {k.Value}</li>");}await context.Response.WriteAsync("</ul>");await context.Response.WriteAsync("<strong>输出</strong><br/>");await context.Response.WriteAsync(queryString.Value);await context.Response.WriteAsync("</ul>");await context.Response.WriteAsync(@"</div></body></html>");});app.Run();
从运行效果看，我们看到QueryString.Create方法创建是经过编码之后的URL。
