//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);
}