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如何在Xamarin.Forms中切换页面？

xamarinxamarin.forms
117
如何在Xamarin Forms中切换页面？我的主页面是ContentPage，我不想切换到像Tabbed Page这样的东西。我已经通过查找应触发新页面的控件的父级，直到找到ContentPage并使用新页面的控件替换内容来伪实现了它。但这似乎非常笨拙。
1
这个问题已经有很多答案了，如果想看如何使用MVVM结构模式来实现它，请参考这个链接：https://stackoverflow.com/a/37142513/9403963 - Alireza Sattari
如果这个问题已经有了很多答案... 那些答案在哪里？你提供的链接只有一个没有得票甚至没有包含评论的答案，而这个页面确实有帮助的内容，不是你提供的那个链接的页面。 - Windgate
13个回答
2
在Xamarin.forms中使用导航属性进行从一个页面到另一个页面的导航。以下是示例代码：

导航属性

void addClicked(object sender, EventArgs e)
        {
            //var createEmp = (Employee)BindingContext;
            Employee emp = new Employee();
            emp.Address = AddressEntry.Text;   
            App.Database.SaveItem(emp);
            this.Navigation.PushAsync(new EmployeeDetails());
  this.Navigation.PushModalAsync(new EmployeeDetails());
        }

使用下面的Xamrian.forms代码在视图单元格中导航到另一页：

 private async void BtnEdit_Clicked1(object sender, EventArgs e)
        {
            App.Database.GetItem(empid);
            await App.Current.MainPage.Navigation.PushModalAsync(new EmployeeRegistration(empid));
        }

以下是示例

public class OptionsViewCell : ViewCell
    {
        int empid;
        Button btnEdit;
        public OptionsViewCell()
        {
        }
        protected override void OnBindingContextChanged()
        {
            base.OnBindingContextChanged();

            if (this.BindingContext == null)
                return;

            dynamic obj = BindingContext;
            empid = Convert.ToInt32(obj.Eid);
            var lblname = new Label
            {
                BackgroundColor = Color.Lime,
                Text = obj.Ename,
            };

            var lblAddress = new Label
            {
                BackgroundColor = Color.Yellow,
                Text = obj.Address,
            };

            var lblphonenumber = new Label
            {
                BackgroundColor = Color.Pink,
                Text = obj.phonenumber,
            };

            var lblemail = new Label
            {
                BackgroundColor = Color.Purple,
                Text = obj.email,
            };

            var lbleid = new Label
            {
                BackgroundColor = Color.Silver,
                Text = (empid).ToString(),
            };

             //var lbleid = new Label
            //{
            //    BackgroundColor = Color.Silver,
            //    // HorizontalOptions = LayoutOptions.CenterAndExpand
            //};
            //lbleid.SetBinding(Label.TextProperty, "Eid");
            Button btnDelete = new Button
            {
                BackgroundColor = Color.Gray,

                Text = "Delete",
                //WidthRequest = 15,
                //HeightRequest = 20,
                TextColor = Color.Red,
                HorizontalOptions = LayoutOptions.EndAndExpand,
            };
            btnDelete.Clicked += BtnDelete_Clicked;
            //btnDelete.PropertyChanged += BtnDelete_PropertyChanged;  

            btnEdit = new Button
            {
                BackgroundColor = Color.Gray,
                Text = "Edit",
                TextColor = Color.Green,
            };
            // lbleid.SetBinding(Label.TextProperty, "Eid");
            btnEdit.Clicked += BtnEdit_Clicked1; ;
            //btnEdit.Clicked += async (s, e) =>{
            //    await App.Current.MainPage.Navigation.PushModalAsync(new EmployeeRegistration());
            //};

            View = new StackLayout()
            {
                Orientation = StackOrientation.Horizontal,
                BackgroundColor = Color.White,
                Children = { lbleid, lblname, lblAddress, lblemail, lblphonenumber, btnDelete, btnEdit },
            };

        }

        private async void BtnEdit_Clicked1(object sender, EventArgs e)
        {
            App.Database.GetItem(empid);
            await App.Current.MainPage.Navigation.PushModalAsync(new EmployeeRegistration(empid));
        }



        private void BtnDelete_Clicked(object sender, EventArgs e)
        {
            // var eid = Convert.ToInt32(empid);
            // var item = (Xamarin.Forms.Button)sender;
            int eid = empid;
            App.Database.DeleteItem(empid);
        }

    }
2

在使用PushAsync之后，使用PopAsync（带有this参数）来移除当前页面。

await Navigation.PushAsync(new YourSecondPage());
this.Navigation.PopAsync(this);
0

在 XAML 页面中添加这个

<ContentPage.ToolbarItems>
            <ToolbarItem Text="Next" Order="Primary"
            Activated="Handle_Activated"/>

</ContentPage.ToolbarItems>

在计算机科学页面上

 async void Handle_Activated(object sender, System.EventArgs e)
        {
            await App.Navigator.PushAsync(new PAGE());
        }
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