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Я использую п уровневую архитектуру Вот мой aspx.cs кодкак Crud операции в GridView с использованием 3 яруса
using System;
using System.Web.UI;
using BAL;
using System.Web.UI.WebControls;
namespace GridViewThreeTierApplication
{
public partial class index : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
BindGrid();
}
}
protected void BindGrid()
{
var dataSource = new DAL.dal().GetAllCustomers();
if (dataSource != null)
{
GridView1.DataSource = dataSource;
GridView1.DataBind();
}
}
protected void GridView1_DataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
Control control = e.Row.Cells[0].Controls[0];
if (control is LinkButton)
{
int num = Convert.ToInt32(e.Row.RowIndex);
bal.DeleteCustomers(num);
}
}
}
}
}
вот мой разметки
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="index.aspx.cs" Inherits="GridViewThreeTierApplication.index" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" CellPadding="4" ForeColor="#333333" GridLines="None" ShowFooter="True" OnDataBound="GridView1_DataBound">
<AlternatingRowStyle BackColor="White" />
<Columns>
<asp:TemplateField ShowHeader="False">
<EditItemTemplate>
<asp:Button ID="LinkButton1" runat="server" Text="Update" CommandName="Update" CausesValidation="true" />
<asp:Button ID="LinkButton2" runat="server" Text="Cancel" CausesValidation="false" CommandName="Cancel" />
</EditItemTemplate>
<ItemTemplate>
<asp:LinkButton ID="LinkButton1" runat="server" CausesValidation="False" CommandName="Edit" Text="Edit"></asp:LinkButton>
<asp:LinkButton ID="LinkButton2" runat="server" CausesValidation="False" CommandName="Delete" Text="Delete"></asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="CustomerID" SortExpression="CustomerID">
<EditItemTemplate>
<asp:TextBox ID="TextBox5" runat="server" Text='<%# Bind("CustomerID") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label5" runat="server" Text='<%# Bind("CustomerID") %>'></asp:Label>
</ItemTemplate>
<FooterTemplate>
<asp:Button ID="InsertBtn" runat="server" Text="Insert" />
</FooterTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="FirstName" SortExpression="FirstName">
<EditItemTemplate>
<asp:TextBox ID="TextBox4" runat="server" Text='<%# Bind("FirstName") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label4" runat="server" Text='<%# Bind("FirstName") %>'></asp:Label>
</ItemTemplate>
<FooterTemplate>
<asp:TextBox ID="txtFname" runat="server"></asp:TextBox>
</FooterTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="LastName" SortExpression="LastName">
<EditItemTemplate>
<asp:TextBox ID="TextBox3" runat="server" Text='<%# Bind("LastName") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label3" runat="server" Text='<%# Bind("LastName") %>'></asp:Label>
</ItemTemplate>
<FooterTemplate>
<asp:TextBox ID="txtFiname" runat="server"></asp:TextBox>
</FooterTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Email" SortExpression="Email">
<EditItemTemplate>
<asp:TextBox ID="TextBox2" runat="server" Text='<%# Bind("Email") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label2" runat="server" Text='<%# Bind("Email") %>'></asp:Label>
</ItemTemplate>
<FooterTemplate>
<asp:TextBox ID="txtLname" runat="server"></asp:TextBox>
</FooterTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="PhoneNumber" SortExpression="PhoneNumber">
<EditItemTemplate>
<asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("PhoneNumber") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%# Bind("PhoneNumber") %>'></asp:Label>
</ItemTemplate>
<FooterTemplate>
<asp:TextBox ID="txtFirname" runat="server"></asp:TextBox>
</FooterTemplate>
</asp:TemplateField>
<asp:CommandField />
</Columns>
<FooterStyle BackColor="#990000" Font-Bold="True" ForeColor="White" />
<HeaderStyle BackColor="#990000" Font-Bold="True" ForeColor="White" />
<PagerStyle BackColor="#FFCC66" ForeColor="#333333" HorizontalAlign="Center" />
<RowStyle BackColor="#FFFBD6" ForeColor="#333333" />
<SelectedRowStyle BackColor="#FFCC66" Font-Bold="True" ForeColor="Navy" />
<SortedAscendingCellStyle BackColor="#FDF5AC" />
<SortedAscendingHeaderStyle BackColor="#4D0000" />
<SortedDescendingCellStyle BackColor="#FCF6C0" />
<SortedDescendingHeaderStyle BackColor="#820000" />
</asp:GridView>
</div>
</form>
</body>
</html>
вот мой уровень доступа к данным
using System;
using System.Collections.Generic;
using System.Data.SqlClient;
using System.Configuration;
namespace DAL
{
public class dal
{
public class Customer
{
public int CustomerID { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
public string Email { get; set; }
public int PhoneNumber { get; set; }
}
public List<Customer> GetAllCustomers()
{
List<Customer> listCustomers = new List<Customer>();
string CS = ConfigurationManager.ConnectionStrings["Intial_DatabaseConnectionString"].ConnectionString;
using (SqlConnection con = new SqlConnection(CS))
{
SqlCommand cmd = new SqlCommand("Select * from Customer", con);
con.Open();
SqlDataReader rdr = cmd.ExecuteReader();
while (rdr.Read())
{
Customer Customer = new Customer();
Customer.CustomerID = Convert.ToInt32(rdr["CustomerID"]);
Customer.FirstName = rdr["FirstName"].ToString();
Customer.LastName = rdr["LastName"].ToString();
Customer.Email = rdr["Email"].ToString();
Customer.PhoneNumber = Convert.ToInt32(rdr["PhoneNumber"]);
listCustomers.Add(Customer);
}
}
return listCustomers;
}
}
}
вот мой бизнес-объект
using System.Configuration;
using System.Data.SqlClient;
namespace BAL
{
public class bal
{
protected void GetALLCustomer()
{
}
public static void DeleteCustomers(int CustomerID)
{
string CS = ConfigurationManager.ConnectionStrings["Intial_DatabaseConnectionString"].ConnectionString;
using (SqlConnection con = new SqlConnection(CS))
{
SqlCommand cmd = new SqlCommand ("Delete from Customer where CustomerID = @CustomerID", con);
SqlParameter param = new SqlParameter("@CustomerId", CustomerID);
cmd.Parameters.Add(param);
con.Open();
cmd.ExecuteNonQuery();
}
}
public static int InsertCustomers(string FirstName, string LastName, string Email, int PhoneNumber)
{
string CS = ConfigurationManager.ConnectionStrings["Intial_DatabaseConnectionString"].ConnectionString;
using (SqlConnection con = new SqlConnection(CS))
{
string updateQuery = "Insert into Customers (FirstName, LastName, Email,PhoneNumber)" +
" values (@FirstName, @LastName, @Email,@PhoneNumber)";
SqlCommand cmd = new SqlCommand(updateQuery, con);
SqlParameter paramFirstName = new SqlParameter("@FirstName", FirstName);
cmd.Parameters.Add(paramFirstName);
SqlParameter paramLastName = new SqlParameter("@LastName", LastName);
cmd.Parameters.Add(paramLastName);
SqlParameter paramEmail = new SqlParameter("@Email", Email);
cmd.Parameters.Add(paramEmail);
SqlParameter paramPhoneNumber = new SqlParameter("@PhoneNumber", PhoneNumber);
con.Open();
return cmd.ExecuteNonQuery();
}
}
}
}
Я могу выполнить запрос выбора. Я не могу выполнить создание, удаление или обновление.
У вас не должно быть вызовов базы данных ADO.NET на вашем бизнес-уровне. Также, если вы делаете только CRUD, вам не нужен BLL. –
Да, я понял, что, но мне нужно приложение с 3 уровнями или n уровнями – Khalil