Question

我需要填写一个TreeView，其中包含我所拥有的词典列表。

List<Dictionary<string,object>>

字典中有标题和子键

[{"title":"foo", "children":[]},]

但是我无法弄清楚绑定。这是完全错误的。我显然需要显示dict [“title”]并使用dict [“children”]作为孩子。

<TreeView.ItemTemplate>
    <HierarchicalDataTemplate ItemsSource="{Binding Value}">
       <HierarchicalDataTemplate.ItemTemplate>
            <DataTemplate>
                <TextBlock Text="{Binding}"/>
            </DataTemplate>
        </HierarchicalDataTemplate.ItemTemplate>
        <TextBlock Text="{Binding Key}"/>
    </HierarchicalDataTemplate>
</TreeView.ItemTemplate>

Hah很明显Binding支持[]语法，所以这种方法有用：

        <TreeView.ItemTemplate>
            <HierarchicalDataTemplate ItemsSource="{Binding Path=[children]}">
                <HierarchicalDataTemplate.ItemTemplate>
                    <DataTemplate>
                        <TextBlock Text="{Binding Path=[title]}"/>
                    </DataTemplate>
                </HierarchicalDataTemplate.ItemTemplate>
                <TextBlock Text="{Binding Path=[title]}"/>
            </HierarchicalDataTemplate>
        </TreeView.ItemTemplate>

然而，每个字典都可以将子项嵌套到他们想要的许多级别。这有可能处理吗？使用上面的模板和以下代码，不会显示大孩子。

        string s = @"[{""title"":""Title1"",""children"":[{""title"":""Child1"",""children"":[{""title"":""grandchild1"",""children"":[]}]}]}]";

        List<Dictionary<string, object>> marr = JsonConvert.DeserializeObject<List<Dictionary<string, object>>>(s);
        mTreeView.ItemsSource = marr;

顺便说一句，使用Binding中的[]称为索引器，我从这个链接的文档中找到了它：

http://msdn.microsoft.com/en-us/library/ms752300.aspx#Path_Syntax

Answer 1

这是你正在看的东西：

<TreeView ItemsSource="{Binding ElementName=rootWindow, Path=Directories}">
        <TreeView.ItemTemplate>
            <HierarchicalDataTemplate ItemsSource="{Binding [Children]}">
                <TextBlock Text="{Binding [Title]}" />
                <HierarchicalDataTemplate.ItemTemplate>
                    <DataTemplate>
                        <TextBlock Text="{Binding}" />
                    </DataTemplate>
                </HierarchicalDataTemplate.ItemTemplate>
            </HierarchicalDataTemplate>
        </TreeView.ItemTemplate>
    </TreeView>

这就是我填充数据的方式：

Dictionary<string, object> documentsDictionary = new Dictionary<string, object>();
        List<string> documentsDictionaryChildren = new List<string> { "Document1", "Document2", "Document3", "Document4", "Document5" };
        documentsDictionary.Add("Title", "Documents");
        documentsDictionary.Add("Children", documentsDictionaryChildren);

        Dictionary<string, object> picturesDictionary = new Dictionary<string, object>();
        List<string> picturesDictionaryChildren = new List<string> { "Picture1", "Picture2", "Picture3", "Picture4", "Picture5" };
        picturesDictionary.Add("Title", "Pictures");
        picturesDictionary.Add("Children", picturesDictionaryChildren);

        Directories.Add(documentsDictionary);
        Directories.Add(picturesDictionary);

C＃WPF - TreeView与Dictionary的绑定

1 个答案: