DataRowView row = (DataRowView)btn.Tag;
MessageBox.Show(row["CategoryID"].ToString() + " : " + row["CategoryName"].ToString());
}
}
}
//数据库操作类
namespace ClassLibrary
{
public class StoreDB
{
public static string connString = Properties.Settings.Default.ConnectionString;
public static Product GetProductByID(int id)
{
Product p = null;
SqlConnection con = new SqlConnection(connString);
SqlCommand cmd = new SqlCommand("GetProductByID", con);
cmd.CommandType = System.Data.CommandType.StoredProcedure;
cmd.Parameters.AddWithValue("@ProductID", id);
try
{
con.Open();
SqlDataReader reader = cmd.ExecuteReader();
while (reader.Read())
{
p = new Product()
{
CategoryID = (int)reader[1],
ModelNumber = reader[2].ToString(),
ModelName = reader[3].ToString(),
ProductImage=reader[4].ToString(),
UnitCost = (decimal)reader[5],
Description = reader[6].ToString()
};
}
return p;
}
catch (Exception)
{
throw;
}
finally
{
con.Close();
}
}
public static void UpdateProductByID(int ProductID,Product p)
{
SqlConnection con = new SqlConnection(connString);
SqlCommand cmd = new SqlCommand("UpdateProductByID", con);
cmd.CommandType = System.Data.CommandType.StoredProcedure;
cmd.Parameters.AddWithValue("@ProductID",ProductID);
cmd.Parameters.AddWithValue("@CategoryID",p.CategoryID);
cmd.Parameters.AddWithValue("@ModelNumber",p.ModelNumber);
cmd.Parameters.AddWithValue("@ModelName",p.ModelName);
cmd.Parameters.AddWithValue("@ProductImage",p.ProductImage);
cmd.Parameters.AddWithValue("@UnitCost",p.UnitCost);
cmd.Parameters.AddWithValue("@Description",p.Description);
try
{
con.Open();
cmd.ExecuteNonQuery();
}
catch (Exception)
{
throw;
}
finally
{
con.Close();
}
}
public static void InsertProduct(Product p)
{
SqlConnection con = new SqlConnection(connString);
SqlCommand cmd = new SqlCommand("InsertProduct", con);
cmd.CommandType = System.Data.CommandType.StoredProcedure;
cmd.Parameters.AddWithValue("@CategoryID", p.CategoryID);
cmd.Parameters.AddWithValue("@ModelNumber", p.ModelNumber);
cmd.Parameters.AddWithValue("@ModelName", p.ModelName);
cmd.Parameters.AddWithValue("@ProductImage", p.ProductImage);
cmd.Parameters.AddWithValue("@UnitCost", p.UnitCost);
cmd.Parameters.AddWithValue("@Description", p.Description);
try
{
con.Open();
cmd.ExecuteNonQuery();
}
catch (Exception)
{
throw;
}
finally
{
con.Close();
}
}
public static void DeleteProductByID(int id)
{
SqlConnection con = new SqlConnection(connString);
SqlCommand cmd = new SqlCommand("DeleteProductByID", con);
cmd.CommandType = System.Data.CommandType.StoredProcedure;
cmd.Parameters.AddWithValue("@ProductID", id);
try
{
con.Open();
cmd.ExecuteNonQuery();
}
catch (Exception)
{
throw;
}
finally
{
con.Close();
}
}
public static ObservableCollection<Product> GetProducts()
{
ObservableCollection<Product> products = new ObservableCollection<Product>();
SqlConnection con = new SqlConnection(connString);
SqlCommand cmd = new SqlCommand("GetProducts", con);
cmd.CommandType = System.Data.CommandType.StoredProcedure;
try
{
con.Open();
SqlDataReader reader = cmd.ExecuteReader();
while (reader.Read())
{
products.Add(new Product()
{
ProductID = (int)reader[0],
CategoryID = (int)reader[1],
ModelNumber = reader[2].ToString(),
ModelName = reader[3].ToString(),
ProductImage = reader[4].ToString(),
UnitCost = (decimal)reader[5],
Description = reader[6].ToString()
});
}
return products;
}
catch (Exception)
{
throw;
}
finally
{
con.Close();
}
}
public static DataSet GetProductsAndCategories()
{
SqlConnection con = new SqlConnection(connString);
SqlCommand cmd = new SqlCommand("GetProducts", con);
cmd.CommandType = System.Data.CommandType.StoredProcedure;
DataSet ds = new DataSet();
SqlDataAdapter adatper = new SqlDataAdapter(cmd);
adatper.Fill(ds, "Products");
cmd.CommandText = "GetCategories";
adatper.Fill(ds, "Categories");
DataRelation rel = new DataRelation("CategoryProduct", ds.Tables["Categories"].Columns["CategoryID"], ds.Tables["Products"].Columns["CategoryID"]);
return ds;
}
}
}
//实体对象
namespace ClassLibrary
{
public class Product
{
public int ProductID { get; set; }
public int CategoryID { get; set; }
public string ModelNumber { get; set; }
public string ModelName { get; set; }
public string ProductImage { get; set; }
public decimal UnitCost { get; set; }
public string Description { get; set; }
public Product(int CategoryID = 0, string ModelNumber = "",
string ModelName = "", string ProductImage = "",
