[DevExpress]禁用TreeListNode CheckBox

在实际开发中，需要根据条件来设置节点不可勾选，查看DevExpress文档发现通过其CustomDrawNodeCheckBox和BeforeCheckNode事件组合使用可以达到，一般设置节点不可以勾选的规则是一样的，所以对代码进行稍微封装。

关键代码：

        /// <summary>
        /// 禁用CheckBox
        /// 说明
        /// 在CustomDrawNodeCheckBox事件中使用
        /// </summary>
        /// <param name="tree">TreeList</param>
        /// <param name="conditionHanlder">委托</param>
        /// <param name="e">CustomDrawNodeCheckBoxEventArgs</param>
        public static void DisabledCheckBox(this TreeListNode tree, Predicate<TreeListNode> conditionHanlder, CustomDrawNodeCheckBoxEventArgs e)
        {
            if (conditionHanlder(e.Node))
            {
                e.ObjectArgs.State = ObjectState.Disabled;
            }
        }
        /// <summary>
        /// 禁止操作节点CheckBox
        /// 说明
        /// 在BeforeCheckNode事件中使用
        /// </summary>
        /// <param name="tree">TreeListNode</param>
        /// <param name="conditionHanlder">委托</param>
        /// <param name="e">CheckNodeEventArgs</param>
        public static void DisabledSetCheckBox(this TreeListNode tree, Predicate<TreeListNode> conditionHanlder, CheckNodeEventArgs e)
        {
            if (conditionHanlder(e.Node))
            {
                e.CanCheck = false;
            }
        }

使用示例：

        /// <summary>
        /// CustomDrawNodeCheckBox事件
        /// </summary>
        void LHTree_CustomDrawNodeCheckBox(object sender, CustomDrawNodeCheckBoxEventArgs e)
        {
            e.Node.DisabledCheckBox(DisableNodeCheckBoxRule, e);
        }
        /// <summary>
        /// BeforeCheckNode事件
        /// </summary>
        void LHTree_BeforeCheckNode(object sender, CheckNodeEventArgs e)
        {
            e.Node.DisabledSetCheckBox(DisableNodeCheckBoxRule, e);
        }
        /// <summary>
        /// Disable TreeListNode规则
        /// </summary>
        /// <param name="node"></param>
        /// <returns></returns>
        private bool DisableNodeCheckBoxRule(TreeListNode node)
        {
            bool _disable = false;
            if (OpLampCfgList.Count > 0)
            {
                string _cabId = OpLampCfgList[0].CabID;
                NodeType _curType = node.GetNodeType();
                if (_curType == NodeType.Lamp)//当节点是灯类型且父节点KEYID等于_cabId时候，屏蔽Checkbox
                {
                    _disable = node.ParentNode.ParentNode.GetKeyID().Equals(_cabId);
                }
                if (_curType == NodeType.Pole)//当节点是杆类型且父节点KEYID等于_cabId时候，屏蔽Checkbox
                {
                    _disable = node.ParentNode.GetKeyID().Equals(_cabId);
                }
                if (_curType == NodeType.Cab && node.GetKeyID().Equals(_cabId))//当节点是箱类型KEYID等于_cabId时候，屏蔽Checkbox
                {
                    _disable = true;
                }
                if (_curType == NodeType.Area || _curType == NodeType.CabsGroupRoot)//当节点类型等于地域或者根节点时候，屏蔽Checkbox
                {
                    _disable = true;
                }
            }
            return _disable;
        }

代码效果：

.csharpcode, .csharpcode pre
{
font-size: small;
color: black;
font-family: consolas, "Courier New", courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }

希望有所帮助！

[DevExpress]禁用TreeListNode CheckBox