标签：tracking document return title static esc arch res threading
方法一
<Window x:Class="TreeViewDemo.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"</Window>
方法二
<Window x:Class="TreeViewDemo.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:DBAccess;assembly=DBAccess"
Title="MainWindow" Height="350" Width="525" >
<Window.Resources>
<HierarchicalDataTemplate DataType="{x:Type local:Category}" ItemsSource="{Binding Path=Products}">
<TextBlock Text="{Binding Path=CategoryName}"></TextBlock>
</HierarchicalDataTemplate>
<HierarchicalDataTemplate DataType="{x:Type local:Product}">
<TextBlock Text="{Binding Path=ModelName}"></TextBlock>
</HierarchicalDataTemplate>
</Window.Resources>
<Grid>
<TreeView Name="TreeCategories" Margin="5">
</TreeView>
</Grid>
</Window>
using DBAccess;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
namespace TreeViewDemo
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
TreeCategories.ItemsSource = StoreDB.GetCategoriedAndProducts();
}
}
}
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Data;
using System.Data.SqlClient;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace DBAccess
{
public class StoreDB
{
public static string connStr = Properties.Settings.Default.Store;
public static ObservableCollection<Product> GetProducts()
{
ObservableCollection<Product> products = new ObservableCollection<Product>();
using (SqlConnection conn = new SqlConnection(connStr))
{
SqlCommand cmd = new SqlCommand("GetProducts", conn);
cmd.CommandType = System.Data.CommandType.StoredProcedure;
conn.Open();
SqlDataReader reader = cmd.ExecuteReader();
while (reader.Read())
{
products.Add(new Product((int)reader["ProductID"],(int)reader["CategoryID"],reader["ModelNumber"].ToString(),
reader["ModelName"].ToString(),reader["ProductImage"].ToString(),(decimal)reader["UnitCost"],reader["Description"].ToString()));
}
return products;
}
}
public static Product GetProductByID(int ProductID)
{
Product pro =null;
using (SqlConnection conn = new SqlConnection(connStr))
{
SqlCommand cmd = new SqlCommand("GetProductByID", conn);
cmd.CommandType = System.Data.CommandType.StoredProcedure;
cmd.Parameters.Add(new SqlParameter("@ProductID",ProductID));
conn.Open();
SqlDataReader reader = cmd.ExecuteReader();
while (reader.Read())
{
pro = new Product((int)reader["ProductID"], (int)reader["CategoryID"], reader["ModelNumber"].ToString(),
reader["ModelName"].ToString(), reader["ProductImage"].ToString(), (decimal)reader["UnitCost"], reader["Description"].ToString());
}
return pro;
}
}
public static bool UpdateProduct(Product pro)
{
using (SqlConnection conn = new SqlConnection(connStr))
{
SqlCommand cmd = new SqlCommand("UpdateProductByID", conn);
cmd.CommandType = System.Data.CommandType.StoredProcedure;
cmd.Parameters.Add(new SqlParameter("@ProductID", pro.ProductID));
cmd.Parameters.Add(new SqlParameter("@ModelName", pro.ModelName));
cmd.Parameters.Add(new SqlParameter("@ModelNumber", pro.ModelNumber));
cmd.Parameters.Add(new SqlParameter("@UnitCost", pro.UnitCost));
cmd.Parameters.Add(new SqlParameter("@Description", pro.Description));
conn.Open();
return cmd.ExecuteNonQuery() > 0;
}
}
public static DataTable GetProductsDataTable()
{
using(SqlConnection conn = new SqlConnection(connStr))
{
SqlCommand cmd = new SqlCommand("GetProducts", conn);
cmd.CommandType = CommandType.StoredProcedure;
SqlDataAdapter adapter = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
adapter.Fill(ds, "Products");
return ds.Tables["Products"];
}
}
public static DataSet GetCategoriedAndProductsDataSet()
{
using (SqlConnection conn = new SqlConnection(connStr))
{
SqlCommand cmd = new SqlCommand("GetProducts", conn);
cmd.CommandType = CommandType.StoredProcedure;
SqlDataAdapter adapter = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
adapter.Fill(ds, "Products");
cmd.CommandText = "GetCategories";
adapter.Fill(ds, "Categories");
DataRelation dr = new DataRelation("CategoryProduct", ds.Tables["Categories"].Columns["CategoryID"], ds.Tables["Produdcts"].Columns["CategoryID"]);
ds.Relations.Add(dr);
return ds;
}
}
public static ICollection<Category> GetCategoriedAndProducts()
{
using (SqlConnection conn = new SqlConnection(connStr))
{
SqlCommand cmd = new SqlCommand("GetProducts", conn);
cmd.CommandType = CommandType.StoredProcedure;
SqlDataAdapter adapter = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
adapter.Fill(ds, "Products");
cmd.CommandText = "GetCategories";
adapter.Fill(ds, "Categories");
DataRelation dr = new DataRelation("CategoryProduct", ds.Tables["Categories"].Columns["CategoryID"], ds.Tables["Products"].Columns["CategoryID"]);
ds.Relations.Add(dr);
ObservableCollection<Category> categories = new ObservableCollection<Category>();
foreach (DataRow categoryRow in ds.Tables["Categories"].Rows)
{
ObservableCollection<Product> products = new ObservableCollection<Product>();
foreach (DataRow productRow in categoryRow.GetChildRows(dr))
{
products.Add(new Product((int)productRow["ProductID"],(int)productRow["CategoryID"],productRow["ModelNumber"].ToString(),productRow["ModelName"].ToString(),productRow["ProductImage"].ToString(),(decimal)productRow["UnitCost"],productRow["Description"].ToString()));
}
categories.Add(new Category(categoryRow["CategoryName"].ToString(),products));
}
return categories;
}
}
}
}
标签：tracking document return title static esc arch res threading
原文地址：https://www.cnblogs.com/LiZhongZhongY/p/10896939.html
