c#自定义控件(2)-修改属性

àì夳堔傛蜴生んèń 2022-09-03 11:22 221阅读 0赞

绘制控件text的方法

/// <summary>
        /// 绘制text
        /// </summary>
        class MyControlTmp:Control/*继承Control类*/
        { 
            public string TxtInfor = string.Empty;
            //添加属性写法使用
            private string content=string.Empty;
            public MyControlTmp(string txt)
            { 
                this.BackColor = Color.White;
                this.Size = new Size(200, 200);
                TxtInfor = txt;
            }
    
            protected override void OnPaint(PaintEventArgs e)
            { 
                base.OnPaint(e);
                Graphics g = e.Graphics;
                int w = this.Width;
                int h = this.Height;
                Rectangle rect = new Rectangle(0, 0, w, h);
                //平滑绘制,反锯齿
                g.SmoothingMode = SmoothingMode.HighQuality;
                g.TextRenderingHint = TextRenderingHint.AntiAliasGridFit;
    
                using (Brush brush = new SolidBrush(Color.Red))
                { 
                    int x = 10;
                    int y = 10;
                    //字体
                    Font font = new Font("宋体", 16, GraphicsUnit.Point);
                    //格式与对齐
                    StringFormat format = new StringFormat();
                    format.Alignment = StringAlignment.Center;
                    format.LineAlignment = StringAlignment.Center;
                    //在控件上指定位置绘制
                    g.DrawString(TxtInfor, font, brush, x, y, format);
                    //在空间上绘制一个矩形,然后绘制txt
                    //g.DrawString(Content, font, brush, rect, format);
                    font.Dispose();
                }
            }
            //[Browsable(true)]
            //[DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)]
            //public string Content
            //{ 
            // get { return this.content; }
            // set { this.content= value; this.Invalidate()/*刷新界面*/; }
            //}
        }

调用

private void Form1_Load(object sender, EventArgs e)
            { 
                MyControlTmp myControl = new MyControlTmp("cdc");
                myControl.Location = new Point(10, 10);
                panel1.Controls.Add(myControl);
            }