三層架構下GridView控件實現增刪改查

轉自：https://blog.csdn.net/iteye_3224/article/details/82373073

第一步：建立三層，並添加他們之間的引用關系，如下圖所示：

 

第二步：添加GridView表格，並且套用格式樣式，如下圖所示：

 

第三步：點擊表格右側的小三角，並選中編輯列，如下圖所示：

 

第四步：添加三個綁定列，並為其綁定上數據，如下圖所示：

 

 

並且修改命令列的名稱為“管理”，做好之后如下圖所示：

 

下面是源代碼的整體架構

接下來是所有的源代碼：

DiaryModels層的Users

 

1.  
   using System;
2.  
   using System.Collections.Generic;
3.  
   using System.Linq;
4.  
   using System.Text;
5.  
    
6.  
   namespace DiaryModels
7.  
   {
8.  
   /// <summary>
9.  
   /// 用戶類
10.  
    /// </summary>
11.  
    public class Users
12.  
    {
13.  
    private int _UserID;
14.  
    private string _UserName;
15.  
    private string _password;
16.  
    /// <summary>
17.  
    /// 用戶ID
18.  
    /// </summary>
19.  
    public int UserID {
20.  
    get { return _UserID; }
21.  
    set { _UserID = value; }
22.  
    }
23.  
    /// <summary>
24.  
    /// 用戶名
25.  
    /// </summary>
26.  
    public string UserName {
27.  
    get { return _UserName; }
28.  
    set { _UserName = value; }
29.  
    }
30.  
    /// <summary>
31.  
    /// 密碼
32.  
    /// </summary>
33.  
    public string password {
34.  
    get { return _password; }
35.  
    set { _password = value; }
36.  
    }
37.  
    }
38.  
    }

DiaryDAL層的UserDAO

 

1.  
   using System;
2.  
   using System.Collections.Generic;
3.  
   using System.Linq;
4.  
   using System.Text;
5.  
   using System.Configuration;
6.  
   using DiaryModels;
7.  
   using System.Data;
8.  
   using System.Data.SqlClient;
9.  
    
10.  
    namespace DiaryDAL
11.  
    {
12.  
    public class UserDAO
13.  
    {
14.  
    Helper help = new Helper();
15.  
    /// <summary>
16.  
    /// 添加一條用戶信息
17.  
    /// </summary>
18.  
    /// <param name="user"></param>
19.  
    /// <returns></returns>
20.  
    public bool Add(Users user) {
21.  
    string cmdText = "insert into Users(UserID,UserName,password) values(@UserID,@UserName,@password)";
22.  
    SqlParameter[] param = new SqlParameter[ 3];
23.  
    param[ 0]= new SqlParameter( "@UserID",user.UserID);
24.  
    param[ 1] = new SqlParameter( "@UserName", user.UserName);
25.  
    param[ 2] = new SqlParameter( "@password", user.password);
26.  
    return help.ExecMake(cmdText, CommandType.Text, param);
27.  
    }
28.  
    /// <summary>
29.  
    /// 刪除一條用戶信息
30.  
    /// </summary>
31.  
    /// <param name="user"></param>
32.  
    /// <returns></returns>
33.  
    public bool Delete(Users user) {
34.  
    string cmdText = "delete from Users where UserID=@UserID";
35.  
    SqlParameter[] param = new SqlParameter[ 1];
36.  
    param[ 0] = new SqlParameter( "@UserID", user.UserID);
37.  
    return help.ExecMake(cmdText, CommandType.Text, param);
38.  
    }
39.  
    /// <summary>
40.  
    /// 修改一條用戶信息
41.  
    /// </summary>
42.  
    /// <param name="user"></param>
43.  
    /// <returns></returns>
44.  
    public bool Modify(Users user) {
45.  
    string cmdText = "update Users set UserName =@UserName,password =@password where UserID =@UserID";
46.  
    SqlParameter[] param = new SqlParameter[ 3];
47.  
    param[ 0] = new SqlParameter( "@UserName", user.UserName);
48.  
    param[ 1] = new SqlParameter( "@password", user.password);
49.  
    param[ 2] = new SqlParameter( "@UserID", user.UserID);
50.  
    return help.ExecMake(cmdText, CommandType.Text, param);
51.  
    }
52.  
    public DataTable Select() {
53.  
    string cmdText = "select * from Users";
54.  
    return help.ExecSelect(cmdText, CommandType.Text);
55.  
    }
56.  
    }
57.  
    }

DiaryDAL層的Helper類

 

1.  
   using System;
2.  
   using System.Collections.Generic;
3.  
   using System.Linq;
4.  
   using System.Text;
5.  
   using System.Data;
6.  
   using System.Data.SqlClient;
7.  
   using System.Configuration;
8.  
    
9.  
   namespace DiaryDAL
10.  
    {
11.  
    public class Helper
12.  
    {
13.  
    /// <summary>
14.  
    /// 執行帶參數的增刪改語句
15.  
    /// </summary>
16.  
    /// <param name="cmdText"></param>
17.  
    /// <param name="Paras"></param>
18.  
    /// <returns></returns>
19.  
    public bool ExecMake(string cmdText, CommandType Cmdtype, SqlParameter[] Paras)
20.  
    {
21.  
     
22.  
    SqlConnection con = new SqlConnection(ConfigurationManager.AppSettings[ "conStr"]);
23.  
    con.Open();
24.  
    //對SqlCommand對象進行初始化
25.  
    SqlCommand SqlComm = new SqlCommand(cmdText, con);
26.  
    SqlComm.CommandType = Cmdtype;
27.  
    //對參數賦值
28.  
    SqlComm.Parameters.AddRange(Paras);
29.  
    //執行命令
30.  
    SqlComm.ExecuteNonQuery();
31.  
    con.Close();
32.  
    return true;
33.  
     
34.  
    }
35.  
     
36.  
    /// <summary>
37.  
    /// 執行不帶參數的查詢語句
38.  
    /// </summary>
39.  
    /// <param name="cmdText"></param>
40.  
    /// <param name="Paras"></param>
41.  
    /// <returns></returns>
42.  
    public DataTable ExecSelect(string cmdText, CommandType Cmdtype)
43.  
    {
44.  
    SqlConnection con = new SqlConnection(ConfigurationManager.AppSettings[ "conStr"]);
45.  
    con.Open();
46.  
     
47.  
    //對SqlCommand對象進行實例化
48.  
    SqlCommand SqlComm = new SqlCommand(cmdText, con);
49.  
    SqlComm.CommandType = Cmdtype;
50.  
    //給參數賦值
51.  
    SqlComm.CommandTimeout = 10000;
52.  
     
53.  
    //返回DataReader對象
54.  
    SqlDataReader DataReader = SqlComm.ExecuteReader();
55.  
    DataTable Dt = new DataTable();
56.  
    //返回DataTable對象
57.  
    Dt.Load(DataReader);
58.  
     
59.  
    //返回數據表
60.  
    con.Close();
61.  
    return Dt;
62.  
    }
63.  
     
64.  
    }
65.  
    }

業務邏輯層DiaryBLL的UserManager沒有進行判斷，讀者明白意思即可

 

1.  
   using System;
2.  
   using System.Collections.Generic;
3.  
   using System.Linq;
4.  
   using System.Text;
5.  
   using System.Data;
6.  
   using DiaryModels;
7.  
   using DiaryDAL;
8.  
    
9.  
   namespace DiaryBLL
10.  
    {
11.  
    public class UserManager
12.  
    {
13.  
    UserDAO userdao = new UserDAO();
14.  
    public bool Add(Users user) {
15.  
    return userdao.Add(user);
16.  
    }
17.  
    public bool Delete(Users user) {
18.  
    return userdao.Delete(user);
19.  
    }
20.  
    public bool Modify(Users user) {
21.  
    return userdao.Modify(user);
22.  
    }
23.  
    public DataTable Select() {
24.  
    return userdao.Select();
25.  
    }
26.  
    }
27.  
    }

表示層：

1.  
   using System;
2.  
   using System.Collections.Generic;
3.  
   using System.Linq;
4.  
   using System.Web;
5.  
   using System.Web.UI;
6.  
   using System.Web.UI.WebControls;
7.  
   using DiaryModels;
8.  
   using DiaryBLL;
9.  
    
10.  
    public partial class _ Default : System. Web. UI. Page
11.  
    {
12.  
    UserManager usermgr = new UserManager();
13.  
    Users user = new Users();
14.  
     
15.  
    //為表格綁定數據源
16.  
    private void Bind() {
17.  
    GridView1.DataSource = usermgr.Select();
18.  
    GridView1.DataBind();
19.  
    }
20.  
    protected void Page_Load(object sender, EventArgs e)
21.  
    {
22.  
    if (!IsPostBack) {
23.  
    Bind();
24.  
    }
25.  
    }
26.  
     
27.  
    //添加用戶信息
28.  
    protected void btnOk_Click(object sender, EventArgs e)
29.  
    {
30.  
    user.UserID = Convert.ToInt16( txtUserID.Text);
31.  
    user.UserName = txtUserName.Text;
32.  
    user.password = txtPassword.Text;
33.  
    if (usermgr.Add(user))
34.  
    {
35.  
    Response.Write( "<script>('添加成功！')</script>");
36.  
    Bind();
37.  
    }
38.  
    else {
39.  
    Response.Write( "<script>('添加失敗！')</script>");
40.  
    }
41.  
     
42.  
    }
43.  
    protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
44.  
    {
45.  
    user.UserID = Convert.ToInt16(((GridView1.Rows[e.RowIndex].FindControl( "Label1") as Label).Text));
46.  
    if (usermgr.Delete(user))
47.  
    {
48.  
    Response.Write( "<script>('刪除成功！')</script>");
49.  
    Bind();
50.  
    }
51.  
    else {
52.  
    Response.Write( "<script>('刪除失敗！')</script>");
53.  
    }
54.  
    }
55.  
    //讓當前行處於修改狀態
56.  
    protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
57.  
    {
58.  
    GridView1.EditIndex = e.NewEditIndex;
59.  
    Bind();
60.  
    }
61.  
    //取消編輯
62.  
    protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
63.  
    {
64.  
    GridView1.EditIndex = -1;
65.  
    Bind();
66.  
    }
67.  
    //更新至數據庫
68.  
    protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
69.  
    {
70.  
    user.UserID = Convert.ToInt16((GridView1.Rows[e.RowIndex].FindControl( "Label1") as Label).Text);
71.  
    user.UserName = (GridView1.Rows[e.RowIndex].FindControl( "TextBox2") as TextBox).Text;
72.  
    user.password = (GridView1.Rows[e.RowIndex].FindControl( "TextBox3") as TextBox).Text;
73.  
     
74.  
    if (usermgr.Modify(user))
75.  
    {
76.  
    Response.Write( "<script>('修改成功！')</script>");
77.  
    GridView1.EditIndex = -1;
78.  
    Bind();
79.  
    }
80.  
    else {
81.  
    Response.Write( "<script>('修改失敗！')</script>");
82.  
    }
83.  
    }
84.  
    }