简单的实现QQ通信功能（三）

//记录更改状态，默认为1是在线
intzt=1;

//记录登录者的变量
privatestringuid;

publicstringUid
{
get{returnuid;}
set{uid=value;}
}

publicLogin()
{
InitializeComponent();
}
//界面加载
privatevoidLogin_Load(objectsender,EventArgse)
{
//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
privatevoidclosewindow_Click(objectsender,EventArgse)
{
this.Close();
}
//关闭按钮鼠标放上去变色
privatevoidclosewindow_MouseEnter_1(objectsender,EventArgse)
{
closewindow.BackColor=Color.LightCoral;
}
//关闭按钮鼠标离开恢复颜色
privatevoidclosewindow_MouseLeave_1(objectsender,EventArgse)
{
closewindow.BackColor=Color.Transparent;
}
//最小化按钮最小化
privatevoidsmallwindow_Click_1(objectsender,EventArgse)
{
this.WindowState=FormWindowState.Minimized;
}

//实现鼠标点在上面大图片上拖动窗体的代码
intx;
inty;

privatevoidpictureBox1_MouseDown(objectsender,MouseEventArgse)
{
x=e.X;
y=e.Y;
}

privatevoidpictureBox1_MouseMove(objectsender,MouseEventArgse)
{
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
privatevoidtextpwd_Enter(objectsender,EventArgse)
{
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
privatevoidcombuid_MouseDown_1(objectsender,MouseEventArgse)
{
combuid.Text="";
combuid.ForeColor=Color.Black;
}

//登录按钮按下时
privatevoidbtnlogin_Click_1(objectsender,EventArgse)
{
//取用户名密码，查询数据库
stringuid=combuid.Text.ToString();
stringpwd=textpwd.Text.ToString();
UsersTableAdapteradp=newUsersTableAdapter();
qqdata.UsersDataTabletable=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

//右键菜单选择在线的时候

//右键菜单选择隐身的时候

//右键菜单选择忙碌的时候

//右键菜单选择离开的时候