在BrightIdeasSoftware.TreeListView列中添加ComboBox并绑定模型属性

• 在TreeListView的指定列中添加ComboBox，该ComboBox显示对应实体有权限的用户列表，支持选择操作
• 用户选择下拉项后，将选中项的文本赋值给对应ModelMapping对象的AccountName属性
• 当前该列以标签形式展示AccountName值，需要改为ComboBox选择形式

列配置 #

this.colMappedAccount.AspectName = "AccountName";
this.colMappedAccount.Text = "Account";

TreeListView数据填充 #

List<ModelMapping> UserMappings = GetAccountsMapping();
List<ModelMapping> roots = new List<ModelMapping>();
roots.AddRange(UserMappings.Where(m => m.Parent == "root").ToList());
tvMapping.Roots = roots;

TreeListView展开与子项委托 #

tvMapping.CanExpandGetter = delegate (object x)
{
    return ((ModelMapping)x).Parent == "root";
};

tvMapping.ChildrenGetter = delegate (object x)
{
    var mapping = (ModelMapping)x;
    List<ModelMapping> mappings = DatasetUserMappings.Where(d => d.Parent.Equals(mapping.Product, StringComparison.OrdinalIgnoreCase)).ToList();
    if (mappings == null) mappings = new List<ModelMapping>();
    return mappings;
};

ModelMapping实体类 #

public class ModelMapping
{
    string product;
    string parent;
    string productName;
    string accountName;
  
    public string Product { get => product; set => product = value; }
    public string Parent { get => parent; set => parent = value; }
    public string ProductName { get => productName; set => productName = value; }        
    public string AccountName { get => accountName; set => accountName = value; }
    public string Name { get => Parent == "root" ? productName : "Child"; }
}

1. 为列绑定ComboBox编辑器 #

给目标列指定ComboBox作为单元格编辑器，并设置触发编辑的方式：

// 初始化ComboBox编辑器
var comboEditor = new BrightIdeasSoftware.ComboBoxEditor();
colMappedAccount.CellEditor = comboEditor;
// 设置点击单元格即可激活编辑
colMappedAccount.CellEditActivation = BrightIdeasSoftware.ObjectListView.CellEditActivateMode.SingleClick;

2. 动态加载对应实体的用户列表 #

通过CellEditorInitializing事件，针对每一行单元格加载该实体对应的有权限用户列表：

tvMapping.CellEditorInitializing += (sender, e) =>
{
    if (e.Column == colMappedAccount)
    {
        var combo = e.Control as ComboBox;
        if (combo != null)
        {
            // 获取当前行对应的实体对象
            var mapping = e.RowObject as ModelMapping;
            // 替换为你的业务逻辑：根据实体获取有权限的用户列表
            var authorizedUsers = GetAuthorizedUsers(mapping);
            
            combo.Items.Clear();
            combo.Items.AddRange(authorizedUsers.ToArray());
            // 默认选中当前AccountName的值
            combo.Text = mapping.AccountName;
            // 可选：设置为仅允许选择列表项，禁止手动输入
            // combo.DropDownStyle = ComboBoxStyle.DropDownList;
        }
    }
};

3. 保存选择结果到AccountName属性 #

通过CellEditFinishing事件，将用户选择的内容同步到实体属性：

tvMapping.CellEditFinishing += (sender, e) =>
{
    if (e.Column == colMappedAccount)
    {
        var combo = e.Control as ComboBox;
        if (combo != null && !string.IsNullOrEmpty(combo.Text))
        {
            var mapping = e.RowObject as ModelMapping;
            // 更新实体的AccountName属性
            mapping.AccountName = combo.Text;
            // 刷新该行显示，确保界面同步
            tvMapping.RefreshObject(mapping);
        }
    }
};

补充说明 #

• GetAuthorizedUsers方法需要根据你的业务逻辑实现，传入ModelMapping对象，返回该实体对应的有权限用户名称列表
• 如果需要支持手动输入用户名称，保持默认的DropDown样式即可；若仅允许选择列表项，设置combo.DropDownStyle = ComboBoxStyle.DropDownList

内容的提问来源于stack exchange，提问作者CSharper