winform屏幕自适应

Winform的窗体自适应一直是PC桌面编程的难题,WPF的布局空间很强大,但是学习成本太高,介绍一种简单的在winform中可以实现的方式。

思路:1.在窗口程序中使用InitializeSize可以记录窗体初始位置
2.窗口大小变化后,会激发SizeChanged事件,计算出控件拉伸比例并重新绘制控件。


winform屏幕自适应_第1张图片
![QQ截图20170606105746.png](http://upload-images.jianshu.io/upload_images/6777122-19a6c9cc05536b9c.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
   autoFit asc = new autoFit();  
    public Form1()
    {
        InitializeComponent();

    }
    private void Form1_Load(object sender, EventArgs e)
    {
        asc.controllInitializeSize(this);  
    }

    private void Form1_SizeChanged(object sender, EventArgs e)
    {
        asc.controlAutoSize(this);  
    }

自适应类
AutoFit.cs

    public struct controlRect
    {
        public int Left;
        public int Top;
        public int Width;
        public int Height;
    }


    public void controllInitializeSize(Form mForm)
    {
        // if (ctrl_first == 0)  
        {
            //  ctrl_first = 1;  
            oldCtrl = new List();
            controlRect cR;
            cR.Left = mForm.Left; cR.Top = mForm.Top; cR.Width = mForm.Width; cR.Height = mForm.Height;
            oldCtrl.Add(cR);
            foreach (Control c in mForm.Controls)
            {
                controlRect objCtrl;
                objCtrl.Left = c.Left; objCtrl.Top = c.Top; objCtrl.Width = c.Width; objCtrl.Height = c.Height;
                oldCtrl.Add(objCtrl);
            }
        }
        // this.WindowState = (System.Windows.Forms.FormWindowState)(2);//记录完控件的初始位置和大小后,再最大化  
        //0 - Normalize , 1 - Minimize,2- Maximize  
    } 


    public void controlAutoSize(Form mForm)
    {
        //int wLeft0 = oldCtrl[0].Left; ;//窗体最初的位置  
        //int wTop0 = oldCtrl[0].Top;  
        ////int wLeft1 = this.Left;//窗体当前的位置  
        //int wTop1 = this.Top;  
        float wScale = (float)mForm.Width / (float)oldCtrl[0].Width;//新旧窗体之间的比例,与最早的旧窗体  
        float hScale = (float)mForm.Height / (float)oldCtrl[0].Height;//.Height;  
        int ctrLeft0, ctrTop0, ctrWidth0, ctrHeight0;
        int ctrlNo = 1;//第1个是窗体自身的 Left,Top,Width,Height,所以窗体控件从ctrlNo=1开始  
        foreach (Control c in mForm.Controls)
        {
            ctrLeft0 = oldCtrl[ctrlNo].Left;
            ctrTop0 = oldCtrl[ctrlNo].Top;
            ctrWidth0 = oldCtrl[ctrlNo].Width;
            ctrHeight0 = oldCtrl[ctrlNo].Height;
            //c.Left = (int)((ctrLeft0 - wLeft0) * wScale) + wLeft1;//新旧控件之间的线性比例  
            //c.Top = (int)((ctrTop0 - wTop0) * h) + wTop1;  
            c.Left = (int)((ctrLeft0) * wScale);//新旧控件之间的线性比例。控件位置只相对于窗体,所以不能加 + wLeft1  
            c.Top = (int)((ctrTop0) * hScale);//  
            c.Width = (int)(ctrWidth0 * wScale);//只与最初的大小相关,所以不能与现在的宽度相乘 (int)(c.Width * w);  
            c.Height = (int)(ctrHeight0 * hScale);//  
            ctrlNo += 1;
        }
    }  
}

}

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