控件问题.请大家帮忙.急啊.............

private int lineSepra;        [DefaultValue("Multiline"), Description("控制编辑控件的文本是否可以跨越多行。"), Category("Appearance")]
        private int   _Percent;
        public  int   Percent
        {
            get
            {
                return _Percent;
            }
            set
            {
                _Percent = value;
            }
        }
        public UserControl1()
        {
            InitializeComponent();
        }        private void UserControl1_Paint(object sender, PaintEventArgs e)
        {
//Invalidate();
            //lineSepra = (this.Height * 2)/10;
            DrawText();
            DrawRect();
        }        private void DrawText()
        {
            
            Graphics theGraphics = Graphics.FromHwnd(this.Handle);
            StringFormat format = new StringFormat();            format.LineAlignment = StringAlignment.Center;
            format.Alignment = StringAlignment.Center;
            string str = "%";
            str = str + System.Convert.ToString(this._Percent);
            theGraphics.DrawString(str, this.Font,new SolidBrush(this.ForeColor), new Rectangle(0,this.Height-lineSepra,this.Width,this.Height),format);
        }        private void DrawRect()
        {
            Graphics theGraphics = Graphics.FromHwnd(this.Handle);            Pen blackPen = new Pen(Color.Red, 2);
            Rectangle rect = new Rectangle(0, 0, this.Width, this.Height - lineSepra);
            // Draw rectangle to screen
            theGraphics.DrawRectangle(blackPen, rect);
        }        private void UserControl1_SizeChanged(object sender, EventArgs e)
        {
            Invalidate();
            lineSepra = (this.Height * 2) / 10;
            DrawText();
            DrawRect();
        }        private void UserControl1_Load(object sender, EventArgs e)
        {
            lineSepra = (this.Height * 2)/10;
            this._Percent = 0;
            this.BackColor = System.Drawing.Color.Lavender;
        }        private void UserControl1_AutoSizeChanged(object sender, EventArgs e)
        {
            Invalidate();
            lineSepra = (this.Height * 2) / 10;
            DrawText();
            DrawRect();
        }这是一个自定义控件.我在引入在别的工程后,改变大小的时候.界面上显示的没有改变.当工程运行时显示的是改变的.还有就是我那句画的文字没有显示出来.帮帮忙.谢