Question

我在同一个应用程序中的不同列表上工作的完全相同（就像，我已经将它们分开寻找拼写错误）。有谁知道为什么我的列表项属性不会绑定？

ViewModel - 这似乎工作正常。我得到了正确的行数，我可以在ItemSelected命令中看到这些ItemViewModels。因此，下面的块似乎处于正常工作状态：

public ObservableCollection<ItemViewModel> Items
{
    get { return _items; }
    set
    {
        _items= value;
        RaisePropertyChanged(() => Items);
    }
}

<namespace.MyListView
    android:id="@+id/my_list"
    android:layout_below="@+id/toolbar_title"
    android:layout_marginTop="30dp"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    local:MvxItemTemplate="@layout/my_item_rowlayout"
    local:MvxBind="ItemsSource Items; ItemClick ItemSelectedCommand;" />

ItemViewModel - 我可以在表的ItemSelected命令中看到这些，但没有任何属性会绑定到布局。

    public string Path
    {
        get { return _path; }
        set
        {
            _path = value;
            RaisePropertyChanged(() => Path);
        }
    }

    public ItemViewModel()
    {
        Path = "some value";
    }


<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:local="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@android:color/white">

    <TextView
      android:id="@+id/item_textview"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:textSize="15dp"
      android:textColor="@android:color/black"
      tools:text="test text"
      android:singleLine="true"
      android:textStyle="normal"
      local:MvxBind="Text Path" />
</LinearLayout>

在调试MyListView时，我可以使用GetChildAt来观察如下所示的视图：

base = {MvvmCross.Binding.Droid.Views.MvxBaseListItemView}
+       base    {Android.Widget.FrameLayout}    Android.Widget.FrameLayout
-       BindingContext  {MvvmCross.Binding.Droid.BindingContext.MvxAndroidBindingContext}   MvvmCross.Binding.Droid.BindingContext.MvxAndroidBindingContext
-       DataContext {Namespace.ItemViewModel}   Namespace.ItemViewModel

我所有的财产都在那里。

的ListView：

[Android.Runtime.Preserve(AllMembers = true)]
public class MyListView: MvxListView
{
    public MyListView(Context context, IAttributeSet attrs)
        : base(context, attrs)
    {

    }

}

从输出：

    MvxBind:Error: 20.30 Problem parsing binding MvxException: Cannot terminate binding expression during option Path in Text Path
      at MvvmCross.Binding.Parse.Binding.MvxBindingParser.ParseEquals (System.String block) [0x00008] in D:\git\MvvmCross\MvvmCross\Core\Binding\Parse\Binding\MvxBindingParser.cs:80 
  at MvvmCross.Binding.Parse.Binding.Swiss.MvxSwissBindingParser.ParseNextBindingDescriptionOptionInto (MvvmCross.Binding.Parse.Binding.MvxSerializableBindingDescription description) [0x00091] in D:\git\MvvmCross\MvvmCross\Core\Binding\Parse\Binding\Swiss\MvxSwissBindingParser.cs:39 
  at MvvmCross.Binding.Parse.Binding.Tibet.MvxTibetBindingParser.ParseNextBindingDescriptionOptionInto (MvvmCross.Binding.Parse.Binding.MvxSerializableBindingDescription description) [0x0002e] in D:\git\MvvmCross\MvvmCross\Core\Binding\Parse\Binding\Tibet\MvxTibetBindingParser.cs:49 
  at MvvmCross.Binding.Parse.Binding.Swiss.MvxSwissBindingParser.ParseBindingDescription (MvvmCross.Binding.Parse.Binding.Swiss.MvxSwissBindingParser+ParentIsLookingForComma parentIsLookingForComma) [0x0000c] in D:\git\MvvmCross\MvvmCross\Core\Binding\Parse\Binding\Swiss\MvxSwissBindingParser.cs:195 
  at MvvmCross.Binding.Parse.Binding.Swiss.MvxSwissBindingParser.ParseBindingDescription () [0x00000] in D:\git\MvvmCross\MvvmCross\Core\Binding\Parse\Binding\Swiss\MvxSwissBindingParser.cs:178 
  at MvvmCross.Binding.Parse.Binding.MvxBindingParser.ParseTargetPropertyNameAndDescription () [0x0000c] in D:\git\MvvmCross\MvvmCross\Core\Binding\Parse\Binding\MvxBindingParser.cs:73 
  at MvvmCross.Binding.Parse.Binding.MvxBindingParser.TryParseBindingSpecification (System.String text, MvvmCross.Binding.Parse.Binding.MvxSerializableBindingSpecification& requestedBindings) [0x00015] in D:\git\MvvmCross\MvvmCross\Core\Binding\Parse\Binding\MvxBindingParser.cs:52

Answer 1

在获得提示查看输出日志后，我发现了一个异常，经过一些搜索后，似乎在尝试使用保留关键字时发生了异常。＆＃34;路径＆＃34;保留，更改属性名称解决了问题。

查看输出日志是关键......

MVVMCross Android列表项属性绑定

1 个答案: