login功能加入用户登录及下拉框显示使用者

Login.xaml.cs

@@ -18,6 +18,7 @@ using System.Data.SqlClient;
 using System.Data;
 using System.Security.Policy;
 using System.IO;
+using formula_manage.Windows;
 
 namespace formula_manage
 {
@@ -33,7 +34,9 @@ namespace formula_manage
 
         public string INIPath = Convert.ToString(System.AppDomain.CurrentDomain.BaseDirectory) + "formula.ini"; //配置文件路径
 
-        public Login()
+        DataTable logindataTable = new DataTable();   //建立login缓存
+
+    public Login()
         {
             WindowStartupLocation = WindowStartupLocation.CenterScreen;
             InitializeComponent();
@@ -53,6 +56,7 @@ namespace formula_manage
                 wr.WriteLine(Log_time + "FORMULA_start");
                 wr.Close();
             }
+
         }
 
         private void Button_Click(object sender, RoutedEventArgs e)  //退出按钮事件
@@ -62,7 +66,16 @@ namespace formula_manage
 
         private void Button_Click_1(object sender, RoutedEventArgs e)  //登录按钮事件
         {
-           if ((User.Text == "engineer" || User.Text == "ENGINEER") && (Pasword.Password == "engineer" || Pasword.Password == "ENGINEER"))
+            string user = User.Text;
+            string pasword = Pasword.Password; ;
+
+            if (User.Text == "") 
+            {
+                System.Windows.MessageBox.Show("请输入用户名");
+                return;
+            }
+
+            if ((user == "engineer" || user == "ENGINEER") && (pasword == "engineer" || pasword == "ENGINEER"))
             {
                 App.USER_Purview = "ENGINEER";//传入用户名
 
@@ -70,9 +83,27 @@ namespace formula_manage
                 MainWindow Main = new MainWindow();
                 window.Close();
                 Main.ShowDialog();//实例化并置顶打开信息窗口
-            }
+            }        
             else
             {
+                string var_sql; 
+
+                if (pasword =="") var_sql = "[UserCode]='" + user + "' and [PassWord] is null";
+                else var_sql = "[UserCode]='" + user + "' and [PassWord]='" + pasword + "'";
+
+                var loginOK = this.logindataTable.Select(var_sql).FirstOrDefault();
+
+                if (loginOK != null)
+                {
+                    App.USER_Purview = User.Text;//传入用户名
+
+                    Window window = Window.GetWindow(this);
+                    MainWindow Main = new MainWindow();
+                    window.Close();
+                    Main.ShowDialog();//实例化并置顶打开窗口
+                                    
+                }
+                else
                 System.Windows.MessageBox.Show("账号或密码错误");
             }
         }
@@ -174,6 +205,29 @@ namespace formula_manage
             logon.IsEnabled = true;  //允许登录按钮
             UserClass.PressKey.PressKeys(Keys.Tab, false);
             UserClass.PressKey.PressKeys(Keys.Tab, true);
+
+            if (DISPENLINK.Background == Brushes.Green)
+            {
+                string user_sql = "SELECT UserCode ,PassWord ,UserSetup ,Capacity ,GROUP_CODE ,Note FROM [Dispensing].[dbo].[UserAccount]";//查询语句            
+
+                try
+                {
+                    await conn_SC.OpenAsync();    //打开数据连接
+                    SqlDataAdapter Stuff_data = new SqlDataAdapter(user_sql, Connstr_SC);   //查询
+
+                    Stuff_data.Fill(logindataTable);    //查询结果存入缓存  
+                    conn_SC.Close();  //关闭连接
+
+                    User.ItemsSource = logindataTable.DefaultView;    //数据加入表格
+                }
+                catch (Exception)
+                {
+                    System.Windows.MessageBox.Show("请求信息失败，检查连接");
+                    return;
+                }
+            }
+
+
         }
     }
 }