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TreeList

news 来源：原创 2024/5/19 0:50:59

https://documentation.devexpress.com/#WindowsForms/CustomDocument2434

添加列

   TreeListColumn column = treeList1.Columns.Add();
            column.Caption = @"建筑列表";
            column.VisibleIndex = 0;

添加节点

https://documentation.devexpress.com/#WindowsForms/DevExpressXtraTreeListNodesTreeListNodes_Addtopic(5DdNJQ)

treeList1.Nodes.Add(new object[] {item});

This method calls the TreeList.AppendNode(nodeData, ParentNode) method. The ParentNode property's value is passed as the method's second parameter. See the TreeList.AppendNode topic to learn more.

https://documentation.devexpress.com/#WindowsForms/DevExpressXtraTreeListTreeList_AppendNodetopic(qybC6w)

下面的代码，演示了添加多个列

private void Form1_Load(object sender, EventArgs e) {
    CreateColumns(treeList1);
    CreateNodes(treeList1);
}

private void CreateColumns(TreeList tl) {
    // Create three columns.
    tl.BeginUpdate();
    tl.Columns.Add();
    tl.Columns[0].Caption = "Customer";
    tl.Columns[0].VisibleIndex = 0;
    tl.Columns.Add();
    tl.Columns[1].Caption = "Location";
    tl.Columns[1].VisibleIndex = 1;
    tl.Columns.Add();
    tl.Columns[2].Caption = "Phone";
    tl.Columns[2].VisibleIndex = 2;
    tl.EndUpdate();
}

private void CreateNodes(TreeList tl) {
    tl.BeginUnboundLoad();
    // Create a root node .
    TreeListNode parentForRootNodes = null;
    TreeListNode rootNode = tl.AppendNode(
        new object[] { "Alfreds Futterkiste", "Germany, Obere Str. 57", "030-0074321" }, 
        parentForRootNodes);
    // Create a child of the rootNode
    tl.AppendNode(new object[] { "Suyama, Michael", "Obere Str. 55", "030-0074263" }, rootNode);
    // Creating more nodes
    // ...
    tl.EndUnboundLoad();
}

禁用编辑

禁用TreeList

   treeList1.OptionsBehavior.Editable = false;

禁用单个列

    TreeListColumn column = treeList1.Columns.Add();
            column.Caption = @"建筑列表";
            column.VisibleIndex = 0;
            column.OptionsColumn.AllowEdit = false;
            column.OptionsColumn.ReadOnly = true;

设置选中行的背景色

TreeList.Appearance.FocusedRow

https://www.devexpress.com/Support/Center/Question/Details/Q419028

To solve the issue, disable the TreeList.OptionsSelection.EnableAppearanceFocusedCell option.

标题

必须先添加列，才能有标题(标题是列标题，TreeList本身的Caption是不显示的)

添加节点图片

http://www.cnblogs.com/zzh1236/archive/2012/06/29/2570057.html

1.添加一个ImageCollection，控件名为imageCollection1 【多个form共用的话，可以使用SharedImageCollection】

按照节点的层级顺序添加图片

2. 设置TreeList的ColumnsImageList，SelectImageList，StateImageList为imageCollection1

3. 注册TreeList的CustomDrawNodeImages事件

treeList1.CustomDrawNodeImages += TreeList1_CustomDrawNodeImages;
private void TreeList1_CustomDrawNodeImages(object sender, CustomDrawNodeImagesEventArgs e)
{
e.SelectImageIndex = e.Node.Level;
}

NodeImage

概念:https://documentation.devexpress.com/#WindowsForms/CustomDocument1073

Nodes can display two images.

Select Image - Typically indicates the node selection (focus) state. However, the same select image can be displayed for a node regardless of the node state. The TreeList provides a mechanism to automatically substitute替代 a select image when a node receives/loses focus.
State Image - Typically indicates any state of a node.

If both select and state images are specified, the select image is displayed first.