修改。

ButcherFactory.BO/Base/WpfUser.cs

@@ -19,21 +19,9 @@ namespace ButcherFactory.BO
     public byte[] Password { get; set; }
     public string Role { get; set; }
 
-    List<string> _roleList;
+    List<string> _roleList = new List<string>();
     [NonDmoProperty]
-    public List<string> RoleList
-    {
-      get
-      {
-        if (_roleList == null)
-        {
-          _roleList = new List<string>();
-          if (!string.IsNullOrEmpty(Role))
-            _roleList.AddRange(Role.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries));
-        }
-        return _roleList;
-      }
-    }
+    public List<string> RoleList { get { return _roleList; } }
 
     [NonDmoProperty]
     public bool Login { get; set; }

ButcherFactory.BO/Utils/AppContext.cs

@@ -12,8 +12,17 @@ namespace ButcherFactory.BO.Utils
     static ServerUrlConfig _connectInfo = ServerUrlConfig.Init();
     public static ServerUrlConfig ConnectInfo { get { return _connectInfo; } }
 
-    static WpfUser _user = LoginUtil.InitUserFromLocal();
-    public static WpfUser User { get { return _user; } }
+    static WpfUser _user = null;
+    public static WpfUser User
+    {
+      get
+      {
+        if (_user == null)
+          _user = LoginUtil.InitUserFromLocal();
+        return _user;
+      }
+      set { _user = value; }
+    }
   }
 
   public class ServerUrlConfig
@@ -22,7 +31,7 @@ namespace ButcherFactory.BO.Utils
     {
       return XmlUtil.DeserializeFromFile<ServerUrlConfig>();
     }
-  
+
     public string ServerUrl { get; set; }
 
     public string SqlConnection { get; set; }

ButcherFactory.BO/Utils/LoginUtil.cs

@@ -23,7 +23,12 @@ namespace ButcherFactory.BO.Utils
         var query = new DmoQuery(typeof(WpfUser));
         var obj = session.ExecuteScalar(query);
         if (obj != null)
-          return (WpfUser)obj;
+        {
+          var user = (WpfUser)obj;
+          if (!string.IsNullOrEmpty(user.Role))
+            user.RoleList.AddRange(user.Role.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries));
+          return user;
+        }
       }
       return new WpfUser();
     }
@@ -76,6 +81,7 @@ namespace ButcherFactory.BO.Utils
     public static void Login(string userName, string pwd)
     {
       RpcFacade.Login(userName, pwd);
+      AppContext.User = new WpfUser();
       AppContext.User.Login = true;
       AppContext.User.Name = userName;
       FillUserEmpInfo(userName);
@@ -119,15 +125,6 @@ namespace ButcherFactory.BO.Utils
       }
     }
 
-    public static void AddUserRole(string role)
-    {
- 
-      if (AppContext.User.RoleList.Contains(role))
-        return;
-      AppContext.User.RoleList.Add(role);
-      UpdateUserRole();
-    }
-
     public static bool TestConnection(int? millisecondsTimeout = null)
     {
       var url = AppContext.ConnectInfo.ServerUrl;

ButcherFactory.Login/Login.cs

@@ -52,8 +52,8 @@ namespace ButcherFactory.Login
       }
       else
       {
-        if (AppContext.User.Name != username && LoginUtil.EncodePwd(pwd) != AppContext.User.Password)
-          throw new Exception("请输入用户名");
+        if (AppContext.User.Name != username || string.Join("", LoginUtil.EncodePwd(pwd)) != string.Join("", AppContext.User.Password))
+          throw new Exception("离线时只能使用上次登录信息登录");
       }
 
 
@@ -98,6 +98,12 @@ namespace ButcherFactory.Login
       var keyBoard = new NumberPad();
       if (keyBoard.ShowDialog() == true)
       {
+        if (!LoginUtil.TestConnection(1000))
+        {
+          if (string.IsNullOrEmpty(AppContext.User.Name))
+            throw new Exception("请检查网络");
+          throw new Exception("离线时无法切换用户");
+        }
         string errorInfo;
         userNameBox.Text = LoginUtil.GetUserNameByCode(keyBoard.Result, out errorInfo);
         if (string.IsNullOrEmpty(userNameBox.Text))