如何使用Eto.Forms TreeGridView

Question

我已经做了很长一段时间了，似乎不知道如何正确地呈现Eto.Forms TreeGridView控件。我现在只想添加几个GridViewItem，然后在顶部得到一个小的灰色栏：

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这是我的代码：

        List<ITreeGridItem> treeGridItems = new List<ITreeGridItem>();
        foreach (var contentType in contentTypes)
        {
            treeGridItems.Add(new TreeGridItem(contentType.Name));
        }

        Content = new DocumentPage(new TreeGridView
        {
            DataStore = new TreeGridItemCollection(treeGridItems)

        }, new Padding(20));

我甚至不知道从哪里开始，我只想得到一棵树，现在每个节点都要显示文本，但我甚至无法做到这一点。

Answer 1

经过一些尝试和错误之后，我想出了如何使用树视图：

 var treeGridView = new TreeGridView
        {
            BackgroundColor = Colors.White
        };

        treeGridView.Columns.Add(new GridColumn
        {
            HeaderText = "Content Type",
            DataCell = new TextBoxCell(0)
        });

        treeGridView.Columns.Add(new GridColumn
        {
            HeaderText = "Create",
            DataCell = new CustomCell
            {
                CreateCell = r =>
                {
                    TreeGridItem item = r.Item as TreeGridItem;

                    ContentTypeTag tag = (ContentTypeTag)item.Tag;
                    var contentType = _siteManager.CurrentSite.ContentTypes.First(x => x.Name.Equals(tag.ClassName));

                    void Click(object btnSender, EventArgs btnArgs)
                    {
                        //Your Event
                    }

                    var button = new LinkButton
                    {
                        Style = "primary-link-btn",
                        Text = $"Create {contentType.Name.ToSentenceCase()}",
                        Command = new Command(Click)
                    };

                    return button;
                }
            }
        });

        treeGridView.Columns.Add(new GridColumn
        {
            HeaderText = "Show All",
            DataCell = new CustomCell
            {
                CreateCell = r =>
                {
                    TreeGridItem item = r.Item as TreeGridItem;

                    ContentTypeTag tag = (ContentTypeTag)item.Tag;
                    var contentType = _siteManager.CurrentSite.ContentTypes.First(x => x.Name.Equals(tag.ClassName));

                    void Click(object btnSender, EventArgs btnArgs)
                    {
                       //Your Event
                    }

                    var button = new LinkButton
                    {
                        Style = "primary-link-btn",
                        Text = $"Show All {contentType.Name.ToSentenceCase()}",
                        Command = new Command(Click)
                    };

                    return button;
                }
            }
        });

            var treeGridItemCollection = new TreeGridItemCollection();
            foreach (var contentType in _siteManager.CurrentSite.ContentTypes)
            {
                var item = new TreeGridItem
                {
                    Values = new string[] { contentType.Name.ToSentenceCase(), "Create", "Show All" },
                    Tag = new ContentTypeTag
                    {
                        ClassName = contentType.Name
                    }
                };

                treeGridItemCollection.Add(item);
            }

            treeGridView.DataStore = treeGridItemCollection;

创建要启动的头列，然后创建一个TreeGridItemCollection，并将数据存储设置为该数据存储。行的每一列的值在字符串数组中设置为TreeGridItem的Value属性。