Question

我想遍历Row的{{1}}中的特定Grid，并在此Row的每个单元格内获取Wpf。我已经搜索了很多，但是还没有找到任何解决方案！ UI元素的类型为UI Element。

说明
如您在所附图像中看到的。我有一个TextBlock，其中有一些Grid和Rows。我想遍历Columns，并将Row 0的每个TextBlock.Text中的cell与一些Row 0进行比较。怎么做？

Answer 1

首先，您可以获取Grid的Children集合，然后可以检查每个元素位于其哪一行：

foreach (var element in grid1.Children) {
    if (grid1.GetRow(element) == 0) {
        //now you get all the UIElements in the first row
    }
}

Answer 2

要保留分开的View和ViewModel而不是使用CodeBehind进行逻辑处理，我建议使用DataGrid和Binding进行搜索，因此View类似于：

<Grid>
    <Grid.RowDefinitions>
        <RowDefinition Height="30"></RowDefinition>
        <RowDefinition Height="*"></RowDefinition>
    </Grid.RowDefinitions>
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="*"></ColumnDefinition>
        <ColumnDefinition Width="*"></ColumnDefinition>
    </Grid.ColumnDefinitions>

    <TextBox Text="{Binding SearchText, UpdateSourceTrigger=PropertyChanged}" Grid.Row="0" Grid.Column="0"></TextBox>
    <TextBlock Text="{Binding SearchResult}" Grid.Row="0" Grid.Column="1"></TextBlock>

    <DataGrid ItemsSource="{Binding Entries}" Grid.Row="1" Grid.ColumnSpan="2">
    </DataGrid>
</Grid>

因此，SearchText是要搜索的内容，而SearchResult是结果。两者都绑定到ViewModel。并且Connected View Model包含DoSearchBay（），用于使用当前SearchText的值更新SearchResult字段，代码如下：

public class ViewModel: INotifyPropertyChanged
{
    private String _searchText = "Bay?";
    private String _searchResult = "N/A";

    public ObservableCollection<MyDataObject> Entries { get; set; }

    public string SearchText
    {
        get => _searchText;
        set
        {
            if (value == _searchText) return;
            _searchText = value;
            DoSearchBay();
            OnPropertyChanged();
        }
    }

    private void DoSearchBay()
    {
        var sel = Entries.Select((dm, index) => new { index, dm.Bay}).FirstOrDefault(obj => obj.Bay.Equals(_searchText, StringComparison.OrdinalIgnoreCase)) ;
        if (sel != null)
        {
            SearchResult = "Found in row " + sel.index;
        }
        else
        {
            SearchResult = "N/A";
        }
    }

    public string SearchResult
    {
        get => _searchResult;
        set
        {
            if (value == _searchResult) return;
            _searchResult = value;
            OnPropertyChanged();
        }
    }


    public ViewModel()
    {
        //Create Fake values
        Entries = new ObservableCollection<MyDataObject>();
        Entries.Add(new MyDataObject() {Bay = "Bay1", Am9 = "value1-1", Am10 = "value1-2", Am11 = "value1-3" });
        Entries.Add(new MyDataObject() { Bay = "Bay2", Am9 = "value2-1", Am10 = "value2-2", Am11 = "value2-3" });
        Entries.Add(new MyDataObject() { Bay = "Bay3", Am9 = "value3-1", Am10 = "value1-2", Am11 = "value3-3" });
    }

    // ToDo Implement INotifyPropertyChanged...
}

包含数据的模型如下所示：

public class MyDataObject
{
    public String Bay { get; set; }
    public String Am9 { get; set; }
    public String Am10 { get; set; }
    public String Am11 { get; set; }
}

遍历WPF网格中的特定行

2 个答案: