Creating Custom Controls with Design Time Support

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C#3.0

C#

Hi. First, I'm sorry for my weak language

in this code i create a componet in design time ,property ComplexObject(class) correctly initialize on the my form with all detailes in the InitializeComponent() method Form.

But when I using the grid property on the form,it not initialize in the initialization component () method Form.

What is the reason?

using System;
using System.Windows.Forms;
using System.ComponentModel;
using System.Drawing;

namespace WindowsFormsApplication18
{
    [DefaultEvent("NumofClicksChanged")]
    [DefaultProperty("NumOfClicks")]
    [ToolboxBitmap(typeof(ButtonEx), "ButtonEx.png")]


  
    public class ButtonEx : Button
    {

        private System.ComponentModel.Container components = null; 
        public ButtonEx()
        {
            components = new System.ComponentModel.Container();
            _numOfClicks = 10;
            _ComplexObject = new Info();
            _grid = new DataGridView();
        }
        private int _numOfClicks;


        public event EventHandler NumofClicksChanged;


        [DefaultValue(10)]
        [Category("Special Properties")]
        [Description("Tells how many time the button has been clicked")]
        [DisplayName("Number of Clicks")]
        public int NumOfClicks
        {
            get { return _numOfClicks; }
            set
            {
                if (_numOfClicks != value)
                {
                    OnNumofClicksChanged(EventArgs.Empty);
                    _numOfClicks = value;
                }
            }
        }

        protected override void OnClick(EventArgs e)
        {
            base.OnClick(e);
            NumOfClicks++;
        }

        protected virtual void OnNumofClicksChanged(EventArgs eventArgs)
        {
            if (NumofClicksChanged != null)
            {
                NumofClicksChanged(this, eventArgs);
            }
        }

        string s;
        [Browsable(false)]
        public string ComplexProperty
        {
            get { return s; }
            set { s = value; }
        }

        private Color c;
        [DefaultValue(typeof(Color), "#FFBA00")]

        public System.Drawing.Color ColorProperty
        {
            get { return c; }
            set { c = value; }
        }

        System.Drawing.Font f;
        public System.Drawing.Font FontProperty
        {
            get
            {
                if (f == null)
                    return this.Font;
                else return f;
            }
            set { f = value; }
        }

        void ResetFontProperty()
        {
            f = null;
        }
        bool ShouldSerializeFontProperty()
        {
            return f == null ? false : true;
        }


        private string spVar;

        [ParenthesizePropertyName(true)]
        public string SpecialProperty
        {
            get { return spVar; }
            set { spVar = value; }
        }

        private int refreshOthers;
        [RefreshProperties(RefreshProperties.All)]
        public int RefreshOtherPropeties
        {
            get { return refreshOthers; }
            set { refreshOthers = value; }
        }


        private string v;

        [ReadOnly(true)]
        public string ReadOnlyProperty
        {
            get { return v; }
            set { v = value; }
        }

        private string v1;

        [RefreshProperties(RefreshProperties.All)]
        public string RefreshOtherProperty
        {
            get { return v1; }
            set { v1 = value; }
        }

        private string v2;

        [NotifyParentProperty(true)]
        public string NotifyParentProperty
        {
            get { return v2; }
            set { v2 = value; }
        }

        private string v3;

        [DesignOnly(true)]
        public string DesignTimeOnlyProperty
        {
            get { return v3; }
            set { v3 = value; }
        }

        private Info _ComplexObject;
        [TypeConverter(typeof(ComplexObjectConverter))]                            
        public Info ComplexObject
        {
            get { return _ComplexObject; }
            set { _ComplexObject = value; }
        }


        private System.Windows.Forms.DataGridView _grid;
        [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
        [TypeConverter(typeof(DataGridViewConverter))]                                    
        public System.Windows.Forms.DataGridView grid
        {
            get { return _grid; }
            set { _grid = value; }
        }

    }


    public class Info
    {
        int i;
        string s;
        public int IntProperty
        {
            get { return i; }
            set { i = value; }
        }
        public string StringProperty
        {
            get { return s; }
            set { s = value; }
        }
    }


    public class ComplexObjectConverter:System.ComponentModel.TypeConverter
    {
        public override PropertyDescriptorCollection GetProperties(ITypeDescriptorContext context, object value, Attribute[] attributes)
        {
            return TypeDescriptor.GetProperties(typeof(Info));
        }

        public override bool GetPropertiesSupported(ITypeDescriptorContext context)
        {
            return true;
        }

    }


    public class DataGridViewConverter : System.ComponentModel.TypeConverter
    {
        public override PropertyDescriptorCollection GetProperties(ITypeDescriptorContext context, object value, Attribute[] attributes)
        {
            return TypeDescriptor.GetProperties(typeof(DataGridView));
        }

        public override bool GetPropertiesSupported(ITypeDescriptorContext context)
        {
            return true;
        }

    }


}