简单的实现QQ通信功能（三）

        //记录更改状态，默认为1是在线
        int zt = 1;

        //记录登录者的变量
        private  string uid;

        public  string Uid
        {
            get { return uid; }
            set { uid = value; }
        }
        
        public Login()
        {
            InitializeComponent();
        }
         //界面加载
        private void Login_Load(object sender, EventArgs e)
        {
            //设置透明，需要先在设计中将要透明控件的backcolor设置为Transparent
            shezhi.Parent = this.pictureBox1;
            smallwindow.Parent = this.pictureBox1;
            closewindow.Parent = this.pictureBox1;
            zhuangtai.Parent = this.pictureBox2;
            //设置左右两个图片
            pictureBox3.Image = imageList1.Images[0];
            pictureBox4.Image = imageList1.Images[1];
           
        }//关闭窗口按钮
        private void closewindow_Click(object sender, EventArgs e)
        {
            this.Close();
        }
        //关闭按钮鼠标放上去变色
        private void closewindow_MouseEnter_1(object sender, EventArgs e)
        {
            closewindow.BackColor = Color.LightCoral;
        }
        //关闭按钮鼠标离开恢复颜色
        private void closewindow_MouseLeave_1(object sender, EventArgs e)
        {
            closewindow.BackColor = Color.Transparent;
        }
        //最小化按钮最小化
        private void smallwindow_Click_1(object sender, EventArgs e)
        {
            this.WindowState = FormWindowState.Minimized;
        }

        //实现鼠标点在上面大图片上拖动窗体的代码
        int x;
        int y;

        private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
        {
            x = e.X;
            y = e.Y;
        }

        private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
        {
            if (e.Button == System.Windows.Forms.MouseButtons.Left)
            {
                this.Left = this.Left + (e.X - x);
                this.Top = this.Top + (e.Y - y);
            }
        }
        //密码框获得焦点时改为密码框，清空，字体颜色变化
        private void textpwd_Enter(object sender, EventArgs e)
        {
            textpwd.Text = "";
            textpwd.ForeColor = Color.Black;
            textpwd.PasswordChar = Convert.ToChar("●");
        }

        //用户名框鼠标点进去时，清空，字体颜色变化
        private void combuid_MouseDown_1(object sender, MouseEventArgs e)
        {
            combuid.Text = "";
            combuid.ForeColor = Color.Black;
        }
        
        //登录按钮按下时
        private void btnlogin_Click_1(object sender, EventArgs e)
        {
        //取用户名密码，查询数据库
            string uid = combuid.Text.ToString();
            string pwd = textpwd.Text.ToString();
            UsersTableAdapter adp = new UsersTableAdapter();
            qqdata.UsersDataTable table = adp.LoginCheck(uid,pwd);
            //判断登录是否成功
            if (table.Rows.Count > 0)
            {
                //成功之后this.DialogResult设为OK
                this.DialogResult = DialogResult.OK;
                Uid = table[0].UserName; //将用户名传到Uid
                adp.UpdateStateByCode(zt, uid); //将状态更改
                adp.UpdateLasttimeByCode(DateTime.Now, uid); //将登录时间记录
            }
            else
            {
                MessageBox.Show("账号密码错误！");
            }
        }
       
       //头像右下角图标点击的时候弹出右键菜单

private void zhuangtai_Click_1(object sender, EventArgs e)
{
contextMenuStrip1.Show(zhuangtai, 0, 18);
}

       //右键菜单选择在线的时候

private void 在线ToolStripMenuItem_Click(object sender, EventArgs e)
{
zhuangtai.Image = imageList2.Images[3];
zt = Convert.ToInt32(在线ToolStripMenuItem.Tag);
}

      //右键菜单选择隐身的时候

private void 隐身ToolStripMenuItem_Click(object sender, EventArgs e)
{
zhuangtai.Image = imageList2.Images[2];
zt = Convert.ToInt32(隐身ToolStripMenuItem.Tag);
}

      //右键菜单选择忙碌的时候

private void 忙碌ToolStripMenuItem_Click(object sender, EventArgs e)
{
zhuangtai.Image = imageList2.Images[1];
zt = Convert.ToInt32(忙碌ToolStripMenuItem.Tag);
}

      //右键菜单选择离开的时候

private void 离开ToolStripMenuItem_Click(object sender, EventArgs e)
{
zhuangtai.Image = imageList2.Images[0];
zt = Convert.ToInt32(离开ToolStripMenuItem.Tag);
}