C#菜单栏问题 [英] C# Menu Bar Issue

问题描述

嗨 我在Access 2007中使用C#2008.我在MDI上使用MDI，现在添加了一个菜单，因为Menu启用了Login MenuItem，并且在加载表单时禁用了其他菜单项.现在，如果登录成功，我将尝试实现此功能，然后其他菜单项将自动启用.我尝试了很多技巧，但无法从登录表单"访问菜单项.我在这里尝试的是代码-

Hi I am using C# 2008 with Access 2007. I am using MDI on MDI a added a menu now that Menu have a Login MenuItem which is enable and other menu items are disabled at form load. Now I am try to implement this if login is successful then other menu items will be enabled automatically. I tried lots of technique but I can''t able to access Menu Items from Login Form. What I tried here is the code -

namespace EzBuddy
{
    public partial class UserLoginForm : Form
    {
        //public NewUser nuser1;
        private OleDbDataReader aReader;
        private OleDbCommand aCommand;
        private OleDbConnection aConnection;
        public int login_flag = 0;
        public UserLoginForm()
        {
            InitializeComponent();
        }
        public void menuEnable()
        {
           
        }
        public void login_code()
        {
            int x = LoginBox.TextLength;
            if (x < 5 || LoginBox.Text.Equals(""))
            {
                MessageBox.Show("ID is of minimum 5 digits as your Permanent Emplolee code or 9 digits as your Temporary Employee code", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
                LoginBox.Text = "";
                PasswordBox.Text = "";
                LoginBox.Focus();
            }
            try
            {
                database_Connection();
                aReader = aCommand.ExecuteReader();
               
                while (aReader.Read())
                {
                    if (aReader.GetString(0).Equals(LoginBox.Text) && aReader.GetString(1).Equals(PasswordBox.Text))
                    {
                         login_flag = 1;
                        break;
                    }
                    else
                    {
                        login_flag = 0;
                    }
                }
                if (login_flag == 1)
                {
                     
                    MDIParentForm.loginToolStripMenuItem1.Enabled = false;
                    MDIParentForm.newToolStripMenuItem3.Enabled = true;
                    MDIParentForm.editToolStripMenuItem3.Enabled = true;
                    MDIParentForm.deleteToolStripMenuItem3.Enabled = true;
                    MDIParentForm.
                    MDIParentForm.searchToolStripMenuItem1.Enabled = true;
                    MDIParentForm.reportsToolStripMenuItem1.Enabled = true;
                    MDIParentForm.utilitiesToolStripMenuItem.Enabled =true;
                    this.Dispose();
                }
                else
                {
                    LoginBox.Text = "";
                    PasswordBox.Text = "";
                    LoginBox.Focus();
                    loginMessage.Visible = true;
                    aReader.Close();
                    aConnection.Close();
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine("Error: {0}", ex.Message);
            }
            finally
            {
                aReader.Close();
                aConnection.Close();
            }
        }
        private void database_Connection()
        {
            try
            {
                aConnection.Open();
                Console.WriteLine("This is the returned data from Login table");
            }
            catch (OleDbException e)
            {
                Console.WriteLine("Error: {0}", e.Errors[0].Message);
            }
        }
        private void UserLoginForm_Load(object sender, EventArgs e)
        {
            aConnection = new OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=D:\\KVSoftware\\KVStudent\\KV1StudentInformation.mdb");
            aCommand = new OleDbCommand("select * from Login", aConnection);
        }
        private void LoginButton_Click(object sender, EventArgs e)
        {
            login_code();
        }
    }
}

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Help me to solve this problem

推荐答案

究竟会发生什么?菜单状态不变吗?

我想登录表单是模态的吗? (显示登录表单时无法操作主窗口)

暂时尝试以下操作:

• 主窗口打开登录表单
• 登录表单处理登录并将结果返回到主窗口
• 主窗口基于菜单禁用其菜单返回

What exactly happens? The menu state is unchanged?

I suppose the login form is modal? (main window cannot be operated while the login form is displayed)

Try this for now:

• Main window opens login form
• Login form processes login and returns the result to the main window
• Main window disables its menu based on the return

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