• Dev ComboxTree的实现


    一个项目中刚好用到,自己做下笔记备份 顺便和大家共享下

    需要用到ASPxDropDownEdit ASPxTreeView 这两个控件

    ASPxDropDownEdit对应的dll为:DevExpress.Web.ASPxEditors.v12.1.dll

    web.config中的配置为:<add tagPrefix="dx" namespace="DevExpress.Web.ASPxEditors" assembly="DevExpress.Web.ASPxEditors.v12.1, Version=12.1.8.0, Culture=neutral, PublicKeyToken=b88d1754d700e49a" />

    ASPxTreeView对应的dll为:DevExpress.Web.v12.1.dll

    web.config中的配置为:<add tagPrefix="dx" namespace="DevExpress.Web.ASPxTreeView" assembly="DevExpress.Web.v12.1, Version=12.1.8.0, Culture=neutral, PublicKeyToken=b88d1754d700e49a" />

    先上效果图:

    <dx:ASPxDropDownEdit ID="ddNodes" runat="server" ClientInstanceName="ddNodes" AllowUserInput="false" Width="200px">
                                <DropDownWindowTemplate>
                                    <dx:ASPxTreeView ID="tvNodes" runat="server" ClientInstanceName="tvNodes"
                                        AllowSelectNode="true" ShowExpandButtons="true">
                                        <ClientSideEvents NodeClick="OnNodesTreeViewNodeClick" /><!--对控件进行赋值的js方法-->
                                    </dx:ASPxTreeView>
                                </DropDownWindowTemplate>
                            </dx:ASPxDropDownEdit>
    

    对控件进行js赋值的方法

    function OnNodesTreeViewNodeClick(s, e) {
                if (e.node.nodes.length > 0)
                    return;
                ddNodes.SetKeyValue(e.node.name);
                ddNodes.SetText(e.node.GetText());
                ddNodes.HideDropDown();
            }
    

    后台代码实现

    ASPxTreeView tvNodes = ddNodes.FindControl("tvNodes") as ASPxTreeView;
    TreeViewCreateNodes(数据列表,tvNodes.Nodes,"0");//创建TreeViewNodes的方法
    tvNodes.SelectedNode = TreeViewSelectedNode(tvNodes,'5'); //5为选中节点的ID
    ddNodes.Text = tvNodes.SelectedNode.Text;
    ddNodes.KeyValue = tvNodes.SelectedNode.Name;

    /// <summary>
    /// 创建TreeViewNodes节点
    /// </summary>
    /// <param name="table"></param>
    /// <param name="nodesCollection"></param>
    /// <param name="parentID"></param>
    public static void TreeViewCreateNodes(IList<T> table, TreeViewNodeCollection nodesCollection, string parentID)
    {
      for (int i = 0; i < table.Count; i++)
      {
        if (table[i].ParentID == parentID)
        {
          TreeViewNode node = new TreeViewNode(table[i].Name, table[i].ID);
          nodesCollection.Add(node);
          TreeViewCreateNodes(table, node.Nodes, node.Name);
        }
      }
    }

    /// <summary>
    /// 获取TreeViewNodes选中节点
    /// </summary>
    /// <param name="tvn"></param>
    /// <param name="selectID"></param>
    /// <returns></returns>
    public void TreeViewSelectedNode(ASPxTreeView tvNodes, string selectID)
    {
      foreach (TreeViewNode tvn in tvNodes.Nodes)
      {
        tvNodes.SelectedNode = TreeViewSelectedNode(tvn, selectID);
        if (tvNodes.SelectedNode != null)
          break;
      }
    }

    /// <summary>
    /// 获取TreeViewNodes选中节点
    /// </summary>
    /// <param name="tvn"></param>
    /// <param name="selectID"></param>
    /// <returns></returns>
    private TreeViewNode TreeViewSelectedNode(TreeViewNode tvn, string selectID)
    {
      if (tvn.Name == selectID)
      {
        return tvn;
      }
      else if (tvn.Nodes.Count > 0)
      {
        foreach (TreeViewNode tvnChild in tvn.Nodes)
        {
          TreeViewNode tvns = TreeViewSelectedNode(tvnChild, selectID);
          if (tvns != null)
            return tvns;
        }
      }
      return null;
    }

     转载引用 请保留 版权http://www.cnblogs.com/xushaonian/p/3230181.html BY www.gkxsn.com

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  • 原文地址:https://www.cnblogs.com/xushaonian/p/3230181.html
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