One 、 Realization effect

1.1、 The implementation effect of control scaling is not enabled

namely ： When the control scaling effect code is not enabled , Control content is fixed in the specified position of the form interface , Will not follow the stretching of the form , Zoom in and adapt , As shown in the figure below ：

1.2、 Enable the implementation effect of control scaling

namely ： When the control scaling effect code is enabled , The content of the control will follow the stretching of the form , Zoom in and adapt , As shown in the figure below ：

Two 、 Realize the control to scale and fit with the form

2.1、 Control scales and fits with the form

The way of realization is ：

① Get the width and height of the form first when initializing the form , then ;

② Traverse the form control to initialize and set the zoom position ;

③ Get the width and height of the current form when the form changes , Then traverse the form control to set .

2.2、 The core code that controls adapt to the form

#region  The size of the control is scaled in proportion to the size of the form 

        private readonly float x; // Defines the width of the current form 
        private readonly float y; // Defines the height of the current form 

        private void setTag(Control cons)
        {
            foreach (Control con in cons.Controls)
            {
                con.Tag = con.Width + ";" + con.Height + ";" + con.Left + ";" + con.Top + ";" + con.Font.Size;
                if (con.Controls.Count > 0) setTag(con);
            }
        }

        private void setControls(float newx, float newy, Control cons)
        {
            // Traverse the controls in the form , Reset the value of the control 
            foreach (Control con in cons.Controls)
                // Gets the Tag Property value , And store string array after segmentation 
                if (con.Tag != null)
                {
                    var mytag = con.Tag.ToString().Split(';');
                    // Determine the value of the control according to the scale of the form 
                    con.Width = Convert.ToInt32(Convert.ToSingle(mytag[0]) * newx); // Width 
                    con.Height = Convert.ToInt32(Convert.ToSingle(mytag[1]) * newy); // Height 
                    con.Left = Convert.ToInt32(Convert.ToSingle(mytag[2]) * newx); // The left margin 
                    con.Top = Convert.ToInt32(Convert.ToSingle(mytag[3]) * newy); // Top margin 
                    var currentSize = Convert.ToSingle(mytag[4]) * newy; // font size                    
                    if (currentSize > 0) con.Font = new Font(con.Font.Name, currentSize, con.Font.Style, con.Font.Unit);
                    con.Focus();
                    if (con.Controls.Count > 0) setControls(newx, newy, con);
                }
        }


        /// <summary>
        ///  Reset form layout 
        /// </summary>
        private void ReWinformLayout()
        {
            var newx = Width / x;
            var newy = Height / y;
            setControls(newx, newy, this);

        }

        #endregion

3、 ... and 、 Usage method

3.1、 Initialize the adapter in the form constructor

        // Be careful ：UIComponetForm Is the name of the form you need to adapt 
        public UIComponetForm()
        {
            InitializeComponent();

            #region    Initialize control scaling 

            x = Width;
            y = Height;
            setTag(this);

            #endregion 
        }

3.2、 Reset zoom layout

        private void UIComponetForm_Resize(object sender, EventArgs e)
        {
            // Reset window layout 
            ReWinformLayout();
        }

By using C# Code implementation form control adaptation （ Adaptive forms ） The layout is finished , Run the project to see the effect .