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Xamarin.Form中的LoginView_Xamarin_Xamarin.forms - Fatal编程技术网

Xamarin.Form中的LoginView

Xamarin.Form中的LoginView,xamarin,xamarin.forms,Xamarin,Xamarin.forms,我正在尝试使用xamarin.form实现loginview。我已经在我的项目中实现了以下代码,但是,一旦我运行,它就不会在视图上显示任何内容 using System; using System.Collections.Generic; using Xamarin.Forms; namespace WebComponents { public partial class LoginView : ContentPage { public LoginV

我正在尝试使用xamarin.form实现loginview。我已经在我的项目中实现了以下代码,但是,一旦我运行,它就不会在视图上显示任何内容

using System;
using System.Collections.Generic;
using Xamarin.Forms;

namespace WebComponents
{   
    public partial class LoginView : ContentPage
    {   
        public LoginView ()
        {
            InitializeComponent ();


            var profilePage = new ContentPage {
                Title = "Profile",
                Content = new StackLayout {
                    Spacing = 20,
                    Padding = 50,
                    VerticalOptions = LayoutOptions.Center,
                    Children = {
                        new Entry { Placeholder = "Username" },
                        new Entry { Placeholder = "Password", IsPassword = true },
                        new Button { Text = "Login", TextColor = Color.White, BackgroundColor = Color.FromHex("77D065") }
                    }
                }
            };
        }
    }
}

LoginView是ContentPage的一个子类-您正在创建另一个ContentPage,profilePage,但没有对其执行任何操作。请尝试以下方法:

   Entry username;
   Entry password;
   Button button;

   public LoginView ()
   {
        InitializeComponent ();

        Title = "Profile";

        Content = new StackLayout {
                Spacing = 20,
                Padding = 50,
                VerticalOptions = LayoutOptions.Center,
                Children = {
                    (username = new Entry { Placeholder = "Username" }),
                    (password = new Entry { Placeholder = "Password", IsPassword = true }),
                    (button = new Button { Text = "Login", TextColor = Color.White, BackgroundColor = Color.FromHex("77D065") })
                }
            }
        };

        button.Clicked += Login;
    }

    public void Login(object sender, EventArgs ea) 
    {
        // check values of username and password here
    }

@杰森,非常感谢,很有效。一旦SOF允许,我会在几分钟内标记您的答案。在这种情况下,我们如何检查用户名和密码?非常感谢。如何在应用程序输出上写入用户名?Console.WriteLine不工作。Console.WriteLine(用户名);Nevermind,System.Diagnostics.Debug.WriteLine(用户名);显然,您不能在初始值设定项中分配事件处理程序。查看我的新编辑。