C# Xamarin Froms列表视图未显示所有项目

哈马林的受害者朋友你好

我的ListView有问题，其中没有显示itemsource中的所有项目。共显示了12项中的6项。这里是我的XAML页面，您可以在其中看到我如何使用listview（listview用于中间部分）：

这里是我定义我的项目的部分。在writeline中，我可以看到所有12项都添加到itemsource。因此，我怀疑问题在这里，但为了解决这个问题，这里有一个隐藏的代码：

 public partial class DetailPage : ContentPage
{

    public Subject sb;
    int i;
    public DetailPage(Subject subject)
    {
        InitializeComponent();

        sb = subject;
        TapGestureRecognizer tap = new TapGestureRecognizer();
        EntityImage.Source = ImageSource.FromFile("nobody_moriginal.jpg");
        text1.Text = subject.text1;
        text2.Text = subject.text2;
        text3.Text = subject.text3;
        text4.Text = subject.text4;

        tap.Tapped += OnTap;
        BasicInfo.GestureRecognizers.Add(tap);

        QuestionListView.ItemsSource = new List<Question>
        {
            new Question
            {
                Vraag = "1+1=?",
                TypeQuestion = Question.QuestionTypes.MulptipleChoice
            },
            new Question
            {
                Vraag= "Is dit waar?",
                TypeQuestion = Question.QuestionTypes.TrueFalse
            },
            new Question
            {
                Vraag= "Hoe ziet jou leven eruit?",
                TypeQuestion = Question.QuestionTypes.Text
            },
            new Question
            {
                Vraag= "Wat vind u van Tim?(Max 150 karakters)",
                TypeQuestion = Question.QuestionTypes.LineText
            },
            new Question
            {
                Vraag= "Wat vind u van Tim?(Max 150 karakters)",
                TypeQuestion = Question.QuestionTypes.LineText
            },
            new Question
            {
                Vraag= "Wat vind u van Tim?(Max 150 karakters)",
                TypeQuestion = Question.QuestionTypes.LineText
            },
            new Question
            {
                Vraag= "Wat vind u van Tim?(Max 150 karakters)",
                TypeQuestion = Question.QuestionTypes.LineText
            },
            new Question
            {
                Vraag= "Wat vind u van Tim?(Max 150 karakters)",
                TypeQuestion = Question.QuestionTypes.LineText
            },
            new Question
            {
                Vraag= "Wat vind u van Tim?(Max 150 karakters)",
                TypeQuestion = Question.QuestionTypes.LineText
            },
            new Question
            {
                Vraag= "Wat vind u van Tim?(Max 150 karakters)",
                TypeQuestion = Question.QuestionTypes.LineText
            },                new Question
            {
                Vraag= "Hoe ziet jou leven eruit?",
                TypeQuestion = Question.QuestionTypes.Text
            },                new Question
            {
                Vraag= "Hoe ziet jou leven eruit?",
                TypeQuestion = Question.QuestionTypes.Text
            }
        };
    }

    private async void OnTap(object sender, EventArgs e)
    {
        await Navigation.PushAsync(new BasicInfoPage(sb));
    }

    private void OnItemTapped(object sender, ItemTappedEventArgs e)
    {
        if (e == null) return; // has been set to null, do not 'process' tapped event
        ((ListView)sender).SelectedItem = null; // de-select the row
    }

public部分类详细信息页面：ContentPage
{
公开谈论某人；
int i；
公共详细信息页面（主题）
{
初始化组件（）；
sb=主题；
TapGestureRecognizer点击=新建TapGestureRecognizer（）；
EntityImage.Source=ImageSource.FromFile（“nobody_moriginal.jpg”）；
text1.Text=subject.text1；
text2.Text=subject.text2；
text3.Text=subject.text3；
text4.Text=subject.text4；
tap.Tapped+=OnTap；
BasicInfo.手势识别器.添加（点击）；
QuestionListView.ItemsSource=新列表
{
新问题
{
Vraag=“1+1=？”，
TypeQuestion=Question.QuestionTypes.MulptipleChoice
},
新问题
{
Vraag=“这是真的吗？”，
TypeQuestion=Question.QuestionTypes.TrueFalse
},
新问题
{
Vraag=“你是怎么做的？”，
TypeQuestion=Question.QuestionTypes.Text
},
新问题
{
Vraag=“最大150卡拉克”，
TypeQuestion=Question.QuestionTypes.LineText
},
新问题
{
Vraag=“最大150卡拉克”，
TypeQuestion=Question.QuestionTypes.LineText
},
新问题
{
Vraag=“最大150卡拉克”，
TypeQuestion=Question.QuestionTypes.LineText
},
新问题
{
Vraag=“最大150卡拉克”，
TypeQuestion=Question.QuestionTypes.LineText
},
新问题
{
Vraag=“最大150卡拉克”，
TypeQuestion=Question.QuestionTypes.LineText
},
新问题
{
Vraag=“最大150卡拉克”，
TypeQuestion=Question.QuestionTypes.LineText
},
新问题
{
Vraag=“最大150卡拉克”，
TypeQuestion=Question.QuestionTypes.LineText
}，新问题
{
Vraag=“你是怎么做的？”，
TypeQuestion=Question.QuestionTypes.Text
}，新问题
{
Vraag=“你是怎么做的？”，
TypeQuestion=Question.QuestionTypes.Text
}
};
}
私有异步void OnTap（对象发送方、事件参数）
{
等待导航.PushAsync（新BasicInfo页面（sb））；
}
已映射的私有void（对象发送方，ItemTappedEventArgs e）
{
如果（e==null）return；//已设置为null，则不要“处理”事件
（（ListView）sender）.SelectedItem=null；//取消选择该行
}

---

提前谢谢！

您在ScrollView中使用ListView。因此，您的所有项目可能都在ListView中，但您无法滚动到它们。

默认情况下

ListView

具有内部

ScrollView

，因此您不需要在您的案例中使用

ScrollView

。

我可以滚动查看我的ListView。它只是在6点被切断th itemNo，你说得对。我在没有scrollview的情况下尝试了它，效果很好。谢谢你的帮助！：）欢迎你…如果你真的需要在scrollview中包含listview，那么查看NestedScrollingEnabled你不需要将scrollview与listview一起使用，默认情况下，每个列表视图都有内部scrollview。据我所知，listview是scrollview默认情况下为e。我会尝试另一种方法，将Listview作为所有视图的父视图，并将网格绑定在其中。猜猜，您的网格限制了您显示的记录数。@MikeDarwish您是对的，这也是问题所在，谢谢您的提醒。欢迎您，我添加一个答案：）

 public partial class DetailPage : ContentPage
{

    public Subject sb;
    int i;
    public DetailPage(Subject subject)
    {
        InitializeComponent();

        sb = subject;
        TapGestureRecognizer tap = new TapGestureRecognizer();
        EntityImage.Source = ImageSource.FromFile("nobody_moriginal.jpg");
        text1.Text = subject.text1;
        text2.Text = subject.text2;
        text3.Text = subject.text3;
        text4.Text = subject.text4;

        tap.Tapped += OnTap;
        BasicInfo.GestureRecognizers.Add(tap);

        QuestionListView.ItemsSource = new List<Question>
        {
            new Question
            {
                Vraag = "1+1=?",
                TypeQuestion = Question.QuestionTypes.MulptipleChoice
            },
            new Question
            {
                Vraag= "Is dit waar?",
                TypeQuestion = Question.QuestionTypes.TrueFalse
            },
            new Question
            {
                Vraag= "Hoe ziet jou leven eruit?",
                TypeQuestion = Question.QuestionTypes.Text
            },
            new Question
            {
                Vraag= "Wat vind u van Tim?(Max 150 karakters)",
                TypeQuestion = Question.QuestionTypes.LineText
            },
            new Question
            {
                Vraag= "Wat vind u van Tim?(Max 150 karakters)",
                TypeQuestion = Question.QuestionTypes.LineText
            },
            new Question
            {
                Vraag= "Wat vind u van Tim?(Max 150 karakters)",
                TypeQuestion = Question.QuestionTypes.LineText
            },
            new Question
            {
                Vraag= "Wat vind u van Tim?(Max 150 karakters)",
                TypeQuestion = Question.QuestionTypes.LineText
            },
            new Question
            {
                Vraag= "Wat vind u van Tim?(Max 150 karakters)",
                TypeQuestion = Question.QuestionTypes.LineText
            },
            new Question
            {
                Vraag= "Wat vind u van Tim?(Max 150 karakters)",
                TypeQuestion = Question.QuestionTypes.LineText
            },
            new Question
            {
                Vraag= "Wat vind u van Tim?(Max 150 karakters)",
                TypeQuestion = Question.QuestionTypes.LineText
            },                new Question
            {
                Vraag= "Hoe ziet jou leven eruit?",
                TypeQuestion = Question.QuestionTypes.Text
            },                new Question
            {
                Vraag= "Hoe ziet jou leven eruit?",
                TypeQuestion = Question.QuestionTypes.Text
            }
        };
    }

    private async void OnTap(object sender, EventArgs e)
    {
        await Navigation.PushAsync(new BasicInfoPage(sb));
    }

    private void OnItemTapped(object sender, ItemTappedEventArgs e)
    {
        if (e == null) return; // has been set to null, do not 'process' tapped event
        ((ListView)sender).SelectedItem = null; // de-select the row
    }