将数据表中的记录添加到字典中
本文关键字:字典 添加 数据表 记录 | 更新日期: 2023-09-27 18:11:29
我是MVVM模式的新手。我已经创建了MVVM模式,我必须填写列表的树视图控制。我有视图,视图模型和模型。我已经通过硬编码在模型中填充数据,但现在我想连接我的MS Access数据表,以在模型中列出,而不是硬编码的数据。我已经创建了DAL并连接了我的MS Access数据表,如下所示:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data.OleDb;
using System.Configuration;
using System.Data;
namespace DAL2
{
public class PersonalDAL
{
// static String _ConnectionString = ConfigurationManager.ConnectionStrings["ConnectionStr"].ConnectionString;
OleDbConnection con = new OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:''faisal''Xerox2014''wpf''WPFHierarchy''IconnectDB.accdb");
public DataTable loademp( )
{
con.Open();
OleDbDataAdapter sda = new OleDbDataAdapter("select * from empTable", con);
DataTable dt = new DataTable();
sda.Fill(dt);
con.Close();
return dt;
}
}
}
这里loadempp方法将返回数据表。在模型中,我只是想填充列表。我被卡住的代码在这里:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml.Linq;
using DAL2;
using System.Data;
namespace DevLake.OrgChart.UI.Model
{
class OrgChartManager
{
private static OrgChartManager self;
//orgchart stored in dictionary
private Dictionary<int, Node> list = new Dictionary<int, Node>();
private OrgChartManager()
{
DataTable my_datatable = new DataTable();
my_datatable = new PersonalDAL().loademp();
int ColumnCount = my_datatable.Columns.Count;
foreach (DataRow dr in my_datatable.Rows)
{
list.Add(dr);
//******here I get stuck and throw syntax error on this line
}
//hard coded populate data
// list.Add(1, new Node { Id = 1, FirstName = "Joe", LastName = "Smith", ParentId = 1 });
//list.Add(2, new Node { Id = 2, FirstName = "Rich", LastName = "Angel", ParentId = 1 });
//list.Add(3, new Node { Id = 3, FirstName = "Mary", LastName = "Peach", ParentId = 1 });
这里我不能填写列表,它抛出语法错误。任何人都可以帮助我如何填写我的列表与数据表数据。我的MS Access表看起来像这样:
ID FirstName LastName ParentId
1 Joe Smith 1
10 Grey Peech 9
11 Manny Travel 9
2 Rich Angel 1
3 Mary Peach 1
4 Mike Door 2
5 Jimmy Fond 2
6 Ann Brown 4
7 George Farm 4
8 Able Jump 4
9 Corn Shaw 1
我能够连接数据库并将数据表带到我的模型中,但在列表中填写数据表数据是我被卡住的地方。请帮助我的朋友
我的节点类:
class Node
{
public int Id { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
public int ParentId { get; set; }
}
}
Drow donw item contro within the data contarol
https://scikit-learn.org/stable/
https://www.codemag.com/Article/1407051/Python-for-C
foreach (DataRow dr in my_datatable.Rows)
{
Node node = new Node
{
Id = (int)dr["ID"]
FirstName = (string)dr["FirstName"],
LastName = (string)dr["LastName"],
ParentId = (int)dr["ParentId"]
};
list[node.Id] = node;
}