C#_會員管理系統：開發七（用戶分類）

登錄界面(VIPLogin.cs)詳細代碼：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Configuration;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Data.SqlClient;

namespace 會員管理系統
{
    public partial class VIPLogin : Form
    {
        public VIPLogin()
        {
            InitializeComponent();
        }
        //用於連接配置文件App.config
        string connStr = ConfigurationManager.ConnectionStrings["str"].ConnectionString;
        //定義一個全局變量 Uid;
        //用於獲取登錄成功后的用戶名
        public static string uid;
        //定義一個全局變量 time;
        //用於獲取用戶登錄時的時間
        public static DateTime time;
        //定義一個全局變量situation
        //用於獲取用戶的登錄狀態
        public static string situation;
        //定義一個全局變量UserType
        //用於獲取用戶權限
        public static string UserType;

        //登錄按鈕
        private void btnLogin_Click(object sender, EventArgs e)
        {
            //連接數據庫語句
            using(SqlConnection con=new SqlConnection(connStr))
            {
                //操作數據庫語句
                string sql = "select vuserpwd,usertype from vipaccount where vUserName='" + txtName.Text + "'";
                using(SqlCommand cmd=new SqlCommand(sql,con))
                {
                    //打開數據庫
                    con.Open();
                    //使用 SqlDataReader 來 讀取數據庫
                    using (SqlDataReader sdr = cmd.ExecuteReader())
                    {
                        //SqlDataReader 在數據庫中為 從第1條數據開始 一條一條往下讀
                        if (sdr.Read()) //如果讀取賬戶成功(文本框中的用戶名在數據庫中存在)
                        {
                            //則將第1條 密碼 賦給 字符串pwd  ,並且依次往后讀取 所有的密碼
                            //Trim()方法為移除字符串前后的空白
                            string pwd = sdr.GetString(0).Trim();
                            //讀取器sdr獲取了2列數據 第1列為密碼 第2列 即索引為1的是用戶類型
                            string uType = sdr.GetString(1).Trim() ;
                            //如果 文本框中輸入的密碼 ==數據庫中的密碼
                            if (pwd == txtPwd.Text)
                            {
                                uid = txtName.Text;
                                time = DateTime.Now;
                                situation = "登錄";
                                //將登錄成功的用戶類型 賦給全局變量UserType
                                //用於獲取當前登錄 用戶的類型
                                UserType = uType;
                                //說明在該賬戶下 密碼正確, 系統登錄成功
                                MessageBox.Show("登錄成功，正在進入主界面......");
                                //***************新增代碼***************
                                VIPLog vl = new VIPLog();
                                //添加當前的用戶信息到日志中
                                vl.AddMsg();
                                //退出程序
                                //創建新的會員資料管理界面窗體並顯示，同時把登錄界面隱藏
                                //VIPManager vm=new VIPManager();
                                VIPMain vmain = new VIPMain();
                                vmain.Show();
                                this.Hide();
                                //***************新增代碼***************
                            }
                            else
                            {
                                //密碼錯誤
                                MessageBox.Show("密碼錯誤，請重新輸入");
                                txtPwd.Text = "";
                            }
                        }
                        else
                        {
                            //用戶名錯誤
                            MessageBox.Show("用戶名錯誤，請重新輸入!");
                            txtName.Text = "";
                        }
                    }
                }
            }
        }
        
        //設置快捷鍵
        private void VIPLogin_KeyDown(object sender, KeyEventArgs e)
        {
            //如果按下ESC鍵
            if (e.KeyCode == Keys.Escape)
            {
                //關閉窗體
                this.Close();
            }
            //如果按下F5鍵
            else if (e.KeyCode == Keys.F5)
            {
                //調用登錄按鈕單擊事件
                this.btnLogin_Click(null,null);
            }
        }

        //關閉
        private void btnClose_Click(object sender, EventArgs e)
        {
            //徹底的退出
            System.Environment.Exit(0);
        }

        //當登錄窗體為活動窗體時
        private void VIPLogin_Activated(object sender, EventArgs e)
        {
            //設置文本框txtName獲得焦點
            txtName.Focus();
        }

        //獲取文本框txtName的快捷鍵
        private void txtName_KeyUp(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Enter)
            {
                txtPwd.Focus();
                txtPwd.SelectAll();
            }
        }

        //獲取文本框txtPwd的快捷鍵
        private void txtPwd_KeyUp(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Enter)
            {
                btnLogin_Click(null, null);
            }
        }
    }
}

 

主界面(VIPMain.cs)新增一個Label控件：

詳細代碼如下：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace 會員管理系統
{
    public partial class VIPMain : Form
    {
        public VIPMain()
        {
            InitializeComponent();
        }

        private void btnVIPManager_Click(object sender, EventArgs e)
        {
            VIPManager vm = new VIPManager();
            vm.Show();
            this.Hide();
        }

        private void btnVIPLogin_Click(object sender, EventArgs e)
        {
            VIPLog vipl = new VIPLog();
            vipl.GetExitTime();
            vipl.AddMsg();
            VIPLogin vp = new VIPLogin();
            vp.Show();
            this.Hide();
        }

        private void btnClose_Click(object sender, EventArgs e)
        {
            VIPLog vipl = new VIPLog();
            vipl.GetExitTime();
            vipl.AddMsg();
            //徹底的退出
            System.Environment.Exit(0);
        }

        private void btnPwdChange_Click(object sender, EventArgs e)
        {
            VIPPwdChange vpc = new VIPPwdChange();
            vpc.Show();
            this.Hide();
        }

        private void VIPMain_Load(object sender, EventArgs e)
        {
            lblCurrentUser.Text = "當前登錄用戶為："+VIPLogin.uid+ "   用戶類型：" + VIPLogin.UserType + "   登錄時間為："+VIPLogin.time;
            //給當前用戶打招呼 
            //這里通過獲取當前用戶電腦上的時間 以及判斷登錄用戶的類型 來給不同類型的用戶打招呼  
            // 定義整型變量 intTime 來獲取 用戶電腦上的具體小時數 然后在如下進行判斷
            int inttime = VIPLogin.time.Hour;
            //獲取VIPLogin窗體的全局變量 UserType 用戶類型, 用於給不同類型的用戶打招呼
            string uType = VIPLogin.UserType;
            //在凌晨0-6點的時候
            if (inttime >= 0 && inttime < 6)
            {
                if (uType == "Administrator")
                {
                    lblSayHi.Text = "尊敬的"+ VIPLogin.uid + "您好,現在已夜深，請注意休息！";
                }
                else if (uType == "NormalUser")
                {
                    lblSayHi.Text = "親愛的" + VIPLogin.uid + "您好,現在已夜深，請注意休息！";
                }
            }
            //早上6點-中午12點的時候
            else if (inttime >= 6 && inttime < 12)
            {
                if (uType == "Administrator")
                {
                    lblSayHi.Text = "尊敬的" + VIPLogin.uid + "早上好！";
                }
                else if (uType == "NormalUser")
                {
                    lblSayHi.Text = "親愛的" + VIPLogin.uid + "早上好！";
                }
            }
            //中午12點-下午6點的時候
            else if (inttime >= 12 && inttime < 18)
            {
                if (uType == "Administrator")
                {
                    lblSayHi.Text = "尊敬的" + VIPLogin.uid + "下午好！";
                }
                else if (uType == "NormalUser")
                {
                    lblSayHi.Text = "親愛的" + VIPLogin.uid + "下午好！";
                }
            }
            //晚上
            else if (inttime >= 18 && inttime < 24)
            {
                if (uType == "Administrator")
                {
                    lblSayHi.Text = "尊敬的" + VIPLogin.uid + "晚上好！";
                }
                else if (uType == "NormalUser")
                {
                    lblSayHi.Text = "親愛的" + VIPLogin.uid + "晚上好！";
                }
            }
            //否則 默認為
            else 
            {
                lblSayHi.Text = "歡迎使用會員管理系統！";
            }
            //判斷用戶類型 並給用戶設置功能權限
            if (uType == "NormalUser")
            {
                btnRegistration.Enabled = false;
                btnLog.Enabled = false;
            }
        }

        private void btnLog_Click(object sender, EventArgs e)
        {
            VIPLog vl=new VIPLog();
            vl.Show();
            this.Hide();
        }

        private void btnRegistration_Click(object sender, EventArgs e)
        {
            VIPRegistration vrn = new VIPRegistration();
            vrn.Show();
            this.Hide();
        }
    }
}

會員資料管理(VIPManager.cs)詳細代碼：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace 會員管理系統
{
    public partial class VIPManager : Form
    {
        public VIPManager()
        {
            InitializeComponent();
        }

        //連接字符串 獲取配置文件里的連接路徑,多次需要調用，放在外面方便
        static string connStr = ConfigurationManager.ConnectionStrings["str"].ConnectionString;
        //窗體運行自動加載
        private void VipManager_Load(object sender, EventArgs e)
        {
            //刷新數據
            Refresh();
            cmbforfieldSelecting.Text = "全局搜索";
            cmbforfieldSelecting.Items.Add("全局搜索");
            cmbforfieldSelecting.Items.Add("編號");
            cmbforfieldSelecting.Items.Add("名字");
            cmbforfieldSelecting.Items.Add("性別");
            cmbforfieldSelecting.Items.Add("年齡");
            cmbforfieldSelecting.Items.Add("地址");
            cmbforfieldSelecting.Items.Add("電話");
            //添加對用戶 類型的判斷 用來設置功能按鈕的使用權限
            if (VIPLogin.UserType == "NormalUser")
            {
                btnAdd.Enabled = false;
                btnDelete.Enabled = false;
                btnSave.Enabled = false;
            }
        }

        //寫一個刷新數據的方法(跟查看數據一樣)
        public void Refresh(bool isAdded = false)
        {
            //查詢數據庫字符串
            string sql = String.Format("select vId '{0}',vName '{1}',vGender '{2}',vAge '{3}',vAddress '{4}',vPhone '{5}' from VipInformation", "編號", "名字", "性別", "年齡", "地址", "電話");
            //連接數據庫對象
            SqlConnection conn = new SqlConnection(connStr);
            //操作數據庫對象
            SqlCommand cmd = new SqlCommand(sql, conn);
            //創建表對象
            System.Data.DataTable dt = new System.Data.DataTable();
            //創建數據庫填充操作對象(語句)
            SqlDataAdapter sda = new SqlDataAdapter(cmd);
            //把數據填充進dt表中
            sda.Fill(dt);
            //指定dgvManager控件的數據源:dt
            dgvManager.DataSource = dt;

            //if (isAdded)
            //{
            //    if (dt.Rows.Count > 0)
            //        dgvManager.Rows[0].Selected = false;
            //    dgvManager.Rows[dt.Rows.Count - 1].Selected = true;
            //}
        }

        //刷新數據界面
        private void btnView_Click(object sender, EventArgs e)
        {
            //刷新數據
            Refresh();
        }

        //添加數據
        private void btnAdd_Click(object sender, EventArgs e)
        {
            //判斷文本框是否為空，提示數據完整性
            if (txtName.Text == "" || txtGender.Text == "" || txtAge.Text == "" || txtAddress.Text == "" || txtPhone.Text == "")
            {
                MessageBox.Show("數據不能為空，請填寫齊全");
                return;
            }
            //插入數據庫字符串
            string sql = string.Format("insert into VipInformation values('{0}','{1}',{2},'{3}','{4}')",txtName.Text.Trim(),txtGender.Text.Trim(),txtAge.Text.Trim(),txtAddress.Text.Trim(),txtPhone.Text.Trim());
            //連接數據庫對象
            SqlConnection conn = new SqlConnection(connStr);
            //操作數據庫對象
            SqlCommand cmd = new SqlCommand(sql, conn);
            //創建表對象
            System.Data.DataTable dt = new DataTable();
            //創建數據庫填充操作對象(語句)
            SqlDataAdapter sda = new SqlDataAdapter(cmd);
            //把數據填充進dt表中
            sda.Fill(dt);
            //指定dgvManager控件的數據源:dt
            dgvManager.DataSource = dt;
            //刷新數據
            Refresh();
        }

        //刪除數據
        private void btnDelete_Click(object sender, EventArgs e)
        {
            //使用sql刪除語句,where 1=1 就是沒有條件，等於全部數據刪除
            string sql = "delete from VipInformation where 1=1";
            //如果選中某行則執行
            if (dgvManager.CurrentRow.Selected)
            {
                sql = sql + " and vid=" + Convert.ToInt32(dgvManager.CurrentRow.Cells[0].Value.ToString());
            }
            int n = 0;
            //創建連接數據庫對象
            SqlConnection conn = new SqlConnection(connStr);
            //創建操作數據庫對象
            SqlCommand cmd = new SqlCommand(sql, conn);
            //打開數據庫
            conn.Open();
            //取得ExecuteNonQuery返回的受影響行數，無影響則為0
            n = cmd.ExecuteNonQuery();
            if (n == 0)
            {
                MessageBox.Show("刪除操作失敗!不存在的ID");
                conn.Close();
                return;
            }
            else if (n > 0)
            {
                MessageBox.Show("刪除操作成功!");
            }
            //關閉數據庫連接
            conn.Close();
            //刷新數據界面
            Refresh();
        }

        //修改數據
        private void btnSave_Click(object sender, EventArgs e)
        {
            if (txtName.Text == "" || txtGender.Text == "" || txtAge.Text == "" || txtAddress.Text == "" || txtPhone.Text == "")
            {
                MessageBox.Show("所提供的數據不完整，請填寫完整數據");
                return;
            }
            int n = 0;
            //更新SQL語句
            string sqlupdate = "update VipInformation set vName='" + txtName.Text + "',vgender='" + txtGender.Text + "',vage=" + txtAge.Text + ",vaddress='" + txtAddress.Text + "',vphone='" + txtPhone.Text + "' where vid='" + dgvManager.CurrentRow.Cells[0].Value.ToString() + "'";
            SqlConnection conn = new SqlConnection(connStr);
            SqlCommand cmd = new SqlCommand(sqlupdate, conn);
            conn.Open();
            n = cmd.ExecuteNonQuery();
            if (n == 0)
            {
                MessageBox.Show("修改操作失敗！");
                conn.Close();
                return;
            }
            else if (n > 0)
            {
                MessageBox.Show("修改操作成功!");
            }
            conn.Close();
            Refresh();
        }

        //點擊dgvManager在文本框上顯示
        private void dgvManager_CellContentClick(object sender, DataGridViewCellEventArgs e)
        {
            txtName.Text = dgvManager.CurrentRow.Cells[1].Value.ToString();
            txtGender.Text = dgvManager.CurrentRow.Cells[2].Value.ToString();
            txtAge.Text = dgvManager.CurrentRow.Cells[3].Value.ToString();
            txtAddress.Text = dgvManager.CurrentRow.Cells[4].Value.ToString();
            txtPhone.Text = dgvManager.CurrentRow.Cells[5].Value.ToString();
        }

        string selectedValue;
        //事件索引改變時觸發
        private void cmbforfieldSelecting_SelectedIndexChanged(object sender, EventArgs e)
        {
            string strSelected = cmbforfieldSelecting.Text;
            switch (strSelected)
            {
                case "全局搜索":
                    selectedValue = "全局搜索";
                    break;
                case "編號":
                    selectedValue="vid";
                    break;
                case "名字":
                    selectedValue = "vname";
                    break;
                case "性別":
                    selectedValue = "vgender";
                    break;
                case "年齡":
                    selectedValue = "vage";
                    break;
                case "地址":
                    selectedValue = "vaddress";
                    break;
                case "電話":
                    selectedValue = "vphone";
                    break;
                default:
                    selectedValue = "全局搜索";
                    break;
            }
        }

        private void txtDataforQuery_TextChanged(object sender, EventArgs e)
        {
            string sql = "";
            if (txtDataforQuery.Text.Trim() == "")
            {
                //執行查詢語句
                sql = "select * from VipInformation";
            }
            else if (cmbforfieldSelecting.Text.Trim() == "全局搜索" || selectedValue == "全局搜索")
            {
                //全字段搜索
                sql = "select * from VipInformation where vName like '%" + txtDataforQuery.Text.Trim() + "%' or vgender like '%" + txtDataforQuery.Text.Trim() + "%' or vage like '%" + txtDataforQuery.Text.Trim() + "%' or vaddress like '%" + txtDataforQuery.Text.Trim() + "%' or vphone like '%" + txtDataforQuery.Text.Trim() + "%'";
            }
            else if (selectedValue == "vid" || selectedValue == "vname" || selectedValue == "vgender" || selectedValue == "vage" || selectedValue == "vaddress" || selectedValue == "vphone")
            {
                //通過相應的字段進行搜索
                sql = "select * from VipInformation where " + selectedValue + " like '%" + txtDataforQuery.Text.Trim() + "%'";
            }

            SqlConnection conn = new SqlConnection(connStr);
            SqlCommand cmd = new SqlCommand(sql, conn);
            conn.Open();
            DataTable dt = new DataTable();
            SqlDataAdapter sda = new SqlDataAdapter(cmd);
            sda.Fill(dt);
            dgvManager.DataSource = dt;
            conn.Close();
        }

        private void btnBack_Click(object sender, EventArgs e)
        {
            VIPMain vmain = new VIPMain();
            vmain.Show();
            this.Hide();
        }

        private void btnClose_Click(object sender, EventArgs e)
        {
            VIPLog vpl = new VIPLog();
            vpl.GetExitTime();
            vpl.AddMsg();
            //徹底的退出
            System.Environment.Exit(0);
        }
         

    }
}

用戶注冊界面(VIPRegistration.cs)新增控件，如圖：

詳細代碼：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Data.SqlClient;
using System.Configuration;

namespace 會員管理系統
{
    public partial class VIPRegistration : Form
    {
        public VIPRegistration()
        {
            InitializeComponent();
        }


        //提交按鈕
        private void btnOK_Click(object sender, EventArgs e)
        {
            
            string connstr = ConfigurationManager.ConnectionStrings["str"].ConnectionString;
            SqlConnection conn = new SqlConnection(connstr);
            string sql = string.Format("select vusername from VipAccount where vUserName='{0}' ",txtName.Text);
            SqlCommand cmd = new SqlCommand(sql, conn);
            conn.Open();
            SqlDataReader sda=cmd.ExecuteReader();

            //new一個 uType 來獲取 radiobutton 點擊事件下 觸發的用戶類型賦值
            string uType = "";
            if (rdoAdministrator.Checked)
            {
                uType = "Administrator";
            }
            else if (rdoNormalUser.Checked)
            {
                uType = "NormalUser";
            }
            else
            {
                uType = "NormalUser";
            }

            //---------------------------
            if (txtName.Text.Trim() == "")
            {
                lblName.Text="用戶名不能為空";
                return;
            }
            else if (txtPwd.Text.Trim() == ""|| txtPwdConfirm.Text.Trim()=="")
            {
                lblPwd.Text = "密碼不能為空";
                return;
            }
            else if (txtPwdConfirm.Text.Trim()!= txtPwd.Text.Trim())
            {
                lblPwdConfirm.Text = "兩次密碼輸入不同，請確認后再輸";
                return;
            }
            else if (sda.Read())
            {
                lblName.Text = "用戶名已存在，請重新輸入";
                return;
            }
            else
            {
                conn.Close();
                SqlConnection conninsert = new SqlConnection(connstr);
                //string insertsql = string.Format("insert into VipAccount(vUserName,vUserPwd) values('{0}','{1}')",txtName.Text,txtPwd.Text);
                string insertsql = "insert into VipAccount(vUserName,vUserPwd,UserType) values(@vUserName,@vUserPwd,@UserType) ";
                //使用1個SQL參數數組 來裝載 需要插入的數據
                SqlParameter[] param = {
                                            new SqlParameter("@vUserName",txtName.Text),
                                            new SqlParameter("@vUserPwd",txtPwd.Text),
                                            new SqlParameter("@UserType",uType)
                                       };
                
                SqlCommand cmdinsert = new SqlCommand(insertsql, conninsert);
                conninsert.Open();
                cmdinsert.Parameters.AddRange(param);
                int n = cmdinsert.ExecuteNonQuery();
                if (n == 0)
                {
                    MessageBox.Show("注冊失敗，請重新輸入");
                }
                else
                {
                    MessageBox.Show("注冊成功");
                }
                conninsert.Close();

            }
            //conn.Close();
        }

        //返回主菜單
        private void btnBack_Click(object sender, EventArgs e)
        {
            VIPMain vm = new VIPMain();
            vm.Show();
            this.Hide();
        }

        private void VIPRegistration_Load(object sender, EventArgs e)
        {
            lblName.Text = "";
            lblPwd.Text = "";
            lblPwdConfirm.Text = "";
        }
        
    }
}