C#實現表單拖動時各個控制項同比自動放縮大小

標籤：控制項   c#   

實現方式主要是利用panel控制項為主題，對於每個控制項的大小位置和字型這幾個屬性進行記錄，

然後根據表單改變的大小同時放縮。

簡要步驟如下：

1 建立C#表單程式項目。

2  Panel放置到表單。

3  設定屬性dock為fill。

4  注意MinnumSize不能設定為0， 改成大於0都行。

public partial class FrmDemo : Form    {        double dFrmWidth;        double dFrmHeight;        double dZoomHorizon;        double dZoomVerticality;        Dictionary<string, string> dicControlsAttribute = new Dictionary<string, string>();        protected void GetAllInitiateContrlInfo(Control CrlContainer)        {            if (CrlContainer.Parent == this)            {                dFrmWidth = Convert.ToDouble(CrlContainer.Width);                dFrmHeight = Convert.ToDouble(CrlContainer.Height);            }            foreach (Control item in CrlContainer.Controls)            {                if (item.Name.Trim() != "")                    dicControlsAttribute.Add(item.Name, (item.Left + item.Width / 2) + "," + (item.Top + item.Height / 2)                                              + "," + item.Width + "," + item.Height + "," + item.Font.Size);                if ((item as UserControl) == null && item.Controls.Count > 0)                    GetAllInitiateContrlInfo(item);            }        }        private void ChangeControlsInitiate(Control CrlContainer)        {            dZoomHorizon = (Convert.ToDouble(CrlContainer.Width) / dFrmWidth);            dZoomVerticality = (Convert.ToDouble(CrlContainer.Height) / dFrmHeight);        }                private void ChangeCurrentControlAttr(Control CrlContainer)        {            double[] dPosition = new double[5];            foreach (Control item in CrlContainer.Controls)            {                if (item.Name.Trim() != "")                {                    if ((item as UserControl) == null && item.Controls.Count > 0)                        ChangeCurrentControlAttr(item);                    string[] strs = dicControlsAttribute[item.Name].Split(',');                    for (int j = 0; j < 5; j++)                    {                        dPosition[j] = Convert.ToDouble(strs[j]);                    }                    double itemWidth = dPosition[2] * dZoomHorizon;                    double itemHeight = dPosition[3] * dZoomVerticality;                    item.Left = Convert.ToInt32(dPosition[0] * dZoomHorizon - itemWidth / 2);                    item.Top = Convert.ToInt32(dPosition[1] * dZoomVerticality - itemHeight / 2);                    item.Width = Convert.ToInt32(itemWidth);                    item.Height = Convert.ToInt32(itemHeight);                    //item.Font = new Font(item.Font.Name, float.Parse                    //((dPosition[4] * Math.Min(dZoomHorizon, dZoomVerticality)).ToString()));                    //字型也可以實現同比放縮。                     }            }        }        protected override void OnSizeChanged(EventArgs e)        {            base.OnSizeChanged(e);            if (dicControlsAttribute.Count > 0)            {                ChangeControlsInitiate(this.Controls[0]);                ChangeCurrentControlAttr(this.Controls[0]);            }        }         public FrmDemo()        {            InitializeComponent();            GetAllInitiateContrlInfo(this.Controls[0]);//建構函式裡面調用即可。        }}

5 效果測試