Question

我刚刚下载了ObjectListView，并且遇到填充问题。

我得到了MyObject的列表：

public class MyObject
{
  public int Id { get; set; }
  public int ParentId { get; set; }
  public string Name { get; set; }

  public int Data { get; set; }

  public MyObject(int id, int parentId, string name, int data)
  {
     Id = id;
     ParentId = parentId;
     Name = name;
     Data = data;
  } 
}

List<MyObject> list = List<MyObject>();

我需要使用TreeListView个元素（Using TreeListView）填充MyObject。此外，我需要一个填充.Data属性的列。即使作为list（同一级别的所有项目）并且没有任何列，我也无法填充它，我尝试过这样做：

this.myTreeListView.SetObjects(list);

和此：

this.myTreeListView.Roots = list;

但树仍然是空的，没有任何人填充，我做错了什么？请帮忙。

Answer 1

您可以找到有关TreeListView here的一些有用的“入门”信息。确保你理解并使用这个概念。

但是，没有提及您还必须添加至少一列（您可以在设计器中执行此操作）。所以这可能是你的问题。 TreeListView教程假定您已经知道如何使用ObjectListView。

我建议你也阅读一般的getting started指南，特别是“精神齿轮转换”部分。

使用ObjectListView的关键部分是配置它。通过在ObjectListView本身或列表中使用的列上设置属性，可以在IDE中完成大部分配置。某些配置无法通过属性完成：这些更复杂的配置是通过安装委托来完成的（稍后会详细介绍）。 配置了列和控件后，将其付诸实践很简单。

希望这有帮助。

Answer 2

这样我就这样做了。我在这里给出完整的代码。看看，问我是否有任何困惑。感谢

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace WindowsApplication1
{
    public partial class Form3 : Form
    {
        private List<Node> data;

        public Form3()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            InitializeData();
            FillTree();
        }

        private void InitializeData()
        {
             string connString = "Data Source=xxx.xx.xx.xx\\test;Initial Catalog=Test;User id=sa;Password=test;";
            string sql = "USP_RefundRequested";

            SqlConnection conn = new SqlConnection(connString);
            data = new List<Node>();

            try
            {
                SqlDataAdapter da = new SqlDataAdapter();
                da.SelectCommand = new SqlCommand(sql, conn);
                da.SelectCommand.CommandType = CommandType.StoredProcedure;

                DataSet ds = new DataSet();
                da.Fill(ds);

                DataTable dt = ds.Tables[0];
                if (ds != null)
                {
                    if (ds.Tables.Count > 0)
                    {
                        ds.Relations.Add("ParentChild",ds.Tables[0].Columns["JID"],
                        ds.Tables[1].Columns["CID"]);

                        DataRelation orderRelation = ds.Relations["ParentChild"];
                        foreach (DataRow order in ds.Tables[0].Rows)
                        {
                            //Console.WriteLine("Subtotals for Order {0}:", order["OrderNumber"]);
                            Node parent1 = new Node( order["JID"].ToString(), "", "","","");

                            foreach (DataRow oChild in order.GetChildRows(orderRelation))
                            {
                                //Console.WriteLine("Order Line {0}: {1}", orderDetail["OrderLineNumber"], string.Format("{0:C}", orderDetail["Price"]));
                                parent1.Children.Add(new Node("", oChild["EntryDate"].ToString(),
                                    oChild["RefundDate"].ToString(),
                                    oChild["ActionBy"].ToString(),
                                    oChild["Comments"].ToString()
                                    ));
                            }
                            data.Add(parent1);

                        }
                    }
                }

            }
            catch (Exception ex)
            {
                Console.WriteLine("Error: " + ex);
            }
            finally
            {
                conn.Close();
            }
        }

        private void FillTree()
        {

            this.treeListView1.CanExpandGetter = delegate(object x) { return ((Node)x).Children.Count > 0; };
            this.treeListView1.ChildrenGetter = delegate(object x) { return ((Node)x).Children; };

            // create the tree columns and set the delegates to print the desired object proerty
            BrightIdeasSoftware.OLVColumn JIDCol = new BrightIdeasSoftware.OLVColumn("Job ID", "JID");
            JIDCol.AspectGetter = delegate(object x) { return ((Node)x).JID; };

            BrightIdeasSoftware.OLVColumn EntryDatecol = new BrightIdeasSoftware.OLVColumn("Entry Date", "EntryDate");
            EntryDatecol.AspectGetter = delegate(object x) { return ((Node)x).EntryDate; };

            BrightIdeasSoftware.OLVColumn RefundDatecol = new BrightIdeasSoftware.OLVColumn("Refund Date", "RefundDate");
            RefundDatecol.AspectGetter = delegate(object x) { return ((Node)x).RefundDate; };

            BrightIdeasSoftware.OLVColumn ActionBycol2 = new BrightIdeasSoftware.OLVColumn("Action By", "ActionBy");
            ActionBycol2.AspectGetter = delegate(object x) { return ((Node)x).ActionBy; };

            BrightIdeasSoftware.OLVColumn Commentscol3 = new BrightIdeasSoftware.OLVColumn("Comments", "Comments");
            Commentscol3.AspectGetter = delegate(object x) { return ((Node)x).Comments; };

            // add the columns to the tree
            this.treeListView1.Columns.Add(JIDCol);
            this.treeListView1.Columns.Add(EntryDatecol);
            this.treeListView1.Columns.Add(RefundDatecol);
            this.treeListView1.Columns.Add(ActionBycol2);
            this.treeListView1.Columns.Add(Commentscol3);
            // set the tree roots
            this.treeListView1.Roots = data;

            treeListView1.Columns[1].Width = 142;
            treeListView1.Columns[2].Width = 142;
            treeListView1.Columns[3].Width = 179;
            treeListView1.Columns[4].Width = 667;
            treeListView1.Columns[treeListView1.Columns.Count - 1].Width = -2;

            treeListView1.ExpandAll();
        }


    }

    public class Node
    {
        public string _jid = "";
        public string JID
        {
            get { return _jid; }
            set { _jid = value; }
        }

        //public int _cid = 0;
        //public int CID
        //{
        //    get { return _cid; }
        //    set { _cid = value; }
        //}

        public string _entrydate;
        public string EntryDate
        {
            get { return _entrydate; }
            set { _entrydate = value; }
        }


        public string _refunddate;
        public string RefundDate
        {
            get { return _refunddate; }
            set { _refunddate = value; }
        }


        public string _actionby = "";
        public string ActionBy
        {
            get { return _actionby; }
            set { _actionby = value; }
        }

        public string _comments = "";
        public string Comments
        {
            get { return _comments; }
            set { _comments = value; }
        }

        public List<Node> _Children = null;
        public List<Node> Children
        {
            get { return _Children; }
            set { _Children = value; }
        }

        public Node(string JID, string EntryDate, string RefundDate, string ActionBy, string Comments)
        {
            this.JID = JID;
            //this.CID = CID;
            this.EntryDate = EntryDate;
            this.RefundDate = RefundDate;
            this.ActionBy = ActionBy;
            this.Comments = Comments;
            this.Children = new List<Node>();
        }
    }
}

ALTER PROC  USP_RefundRequested  
AS  

BEGIN  
;WITH  Hierarchy AS  
(  
    SELECT DISTINCT  JID  
            ,CAST(NULL AS DATETIME) EntryDate  
            ,CAST(NULL AS DATETIME) RefundDate  
            ,CAST(NULL AS VARCHAR(MAX)) Comments  
            ,CAST(NULL AS BIT) Refund  
            ,CAST(NULL AS VARCHAR(30)) ActionBy  
            ,nLevel = 1  
   ,0 AS CID  
    FROM refundrequested  
    UNION ALL  
    SELECT   CAST(NULL AS INT) JID  
            ,E.EntryDate  
            ,E.RefundDate  
            ,E.Comments  
            ,E.Refund  
            ,E.ActionBy  
            ,H.nLevel+1  
   ,H.JID  AS CID  

    FROM refundrequested   E  
    JOIN Hierarchy  H ON E.JID = H.JID  

)  

--SELECT *  
--FROM Hierarchy  WHERE CID=0
--ORDER BY COALESCE(JID, CID) DESC, nLevel  

SELECT * into #tmpHierarchy FROM Hierarchy

SELECT JID,EntryDate,RefundDate,ActionBy,Comments,CID  
FROM tmpHierarchy  WHERE CID=0
ORDER BY COALESCE(JID, CID) DESC, nLevel  

SELECT JID,EntryDate,RefundDate,ActionBy,Comments,CID  
FROM tmpHierarchy  WHERE CID>0
ORDER BY COALESCE(JID, CID) DESC, nLevel  

drop table #tmpHierarchy
END  
go

如何填充BrightIdeasSoftware.TreeListView？

2 个答案: