小编Amg*_*rry的帖子

所以我有一个复杂的形式来创建一个实体,我想用它来编辑我也使用新的角形式API.我将表单的结构与从数据库中检索的数据完全相同,因此我想将整个表单的值设置为此处检索的数据,这是我想要做的示例:

this.form = builder.group({
      b : [ "", Validators.required ],
      c : [ "", Validators.required ],
      d : [ "" ],
      e : [ [] ],
      f : [ "" ]
    });
this.form.value({b:"data",c:"data",d:"data",e:["data1","data2"],f:data});

PS:NgModel不能用于新的表单api我也不介意在模板中使用单向数据绑定

<input formControlName="d" value="[data.d]" />

这有效,但在数组的情况下会很痛苦

所以我有一个带有复选框的viewHolder,这是我的viewModel

@Bindable
var itemIsSelected: Boolean = isSelected
    set(value) {
        if (field != value) {
            field = value
            notifyPropertyChanged(BR.itemIsSelected) // this doesn't work
            notifyChange() // this one works
        }
    }

这是我的viewHolder类

inner class SpecialityItemViewHolder(val binding: ItemSpecialityFilterBinding): RecyclerView.ViewHolder(binding.root) {
        fun bind(specialityItemViewModel: SpecialityItemViewModel) {
            binding.viewModel = specialityItemViewModel
            binding.executePendingBindings()
            this.itemView.setOnClickListener {
                binding.viewModel?.let {
                    it.itemIsSelected = !it.itemIsSelected // this doesn't trigger ui changes
                }
            }
        }
    }

XML

<?xml version="1.0" encoding="utf-8"?>
<layout>
    <data>
        <variable
            name="viewModel"
            type="packagename.ItemViewModel" />
    </data>

    <android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:paddingTop="@dimen/vertical_margin_small"
        android:paddingBottom="@dimen/vertical_margin_small"
        xmlns:app="http://schemas.android.com/apk/res-auto" …

我有一个包含颜色列表的 ComboBox，我想使用选定的颜色来填充矩形，所以我这样做了：

var alwan = typeof(Colors).GetTypeInfo().DeclaredProperties;
            foreach (var item in alwan)
            {
                x.Add(item);
            }
            CbForColors.ItemsSource = x;
            CbForColors_Copy.ItemsSource = x;

private void CbForColors_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
        var color = CbForColors.SelectedItem as PropertyInfo;
        //var color2 = color.GetMethod;
        //var color3 = color2.Invoke(color,null);
        Rect_Sample.Fill = (Color)color.GetValue(null);       
}

我收到此错误：

无法将类型“ Windows.UI.Color”隐式转换为“ Windows.UI.Xaml.Media.Brush”

注释行我得到argb了颜色，即。#FFA07FF0（类似的东西）。已经实现的东西有什么问题，我如何从中制作颜色argb？我应该把它变成一个字符串，然后把每 2 个字符变成一个 int 并把它们放在一个新的颜色 a,r,g,b 中吗？

我正在为Windows Phone 8制作一个Tic-Tac-Toe游戏,我想让游戏与自己一起作为主菜单的背景

private Button[] bts;
private List<Button> temp = new List<Button>();
private int[,] winningConditions;
private int counter;
private string Board;

public MainPage()
{
    InitializeComponent();
    bts = new[] { _1, _2, _3, _4, _5, _6, _7, _8, _9 };
    winningConditions = new[,] { { 0, 1, 2 }, { 3, 4, 5 }, { 6, 7, 8 }, { 0, 3, 6 },
    { 1, 4, 7 }, { 2, 5, 8 }, { 0, 4, 8 }, { 2, …