任务计划页面修改，登录页面修改

Login.xaml.cs

@@ -20,6 +20,7 @@ namespace SunlightCentralizedControlManagement_SCCM_
     
         private readonly string DBAddress = Environment.CurrentDirectory + "\\DataBase\\SCCM.db";  //数据库路径
         DataTable logindataTable = new DataTable();   //建立login缓存
+        DataTable logindataT = new DataTable();   //建立login缓存
 
         public Login()
         {
@@ -61,7 +62,7 @@ namespace SunlightCentralizedControlManagement_SCCM_
                 }
                 else
                 {
-                    var paw = logindataTable.Select("Name='" + user + "'").First().Field<string>("Password");
+                    string paw = logindataT.Select("Name='" + user + "'").First().Field<string>("Password");
                     if (paw == null) paw = "";
 
                     if (paw == pasword)
@@ -102,7 +103,9 @@ namespace SunlightCentralizedControlManagement_SCCM_
             logon.IsEnabled = false;
             SQLiteHelper db = new SQLiteHelper(DBAddress); //数据库连接路径            
             db.Open();  //打开数据库
-            logindataTable = db.ExecuteDataSet("select * from USER where Groups<>'CHIEF'", null).Tables[0];  //读取表写入缓存           
+            logindataTable = db.ExecuteDataSet("select * from USER where Groups<>'CHIEF'", null).Tables[0];  //读取表写入缓存
+                                                                                                             
+            logindataT = db.ExecuteDataSet("select * from USER ", null).Tables[0];
             db.Close(); 
             User.ItemsSource = logindataTable.AsEnumerable().Select(rowdata => rowdata.Field<string>("Name"));//转换   
             logon.IsEnabled = true;  //允许登录按钮