C# Change the Default TabPage in TabControl using Custom TabPage

Question

I created a Custom TabControl and a custom TabPage like below:

Custom TabControl code:

public class MyCustomTabControl : TabControl
{
   //Some Custom Properties

   public MyCustomTabControl () : base()
    {
        base.Width = 200;
        base.Height = 100;

    }
}

CustomTabPage:

public class MyCustomTabPage : TabPage
{
    //Some Custom Properties

    public MyCustomTabPage() : base()
    {                     
        this.BackColor = System.Drawing.Color.Transparent;
    }
}

How can I do it so that when I add my custom control MyCustomTabControl in the form, it add the custom TabPage named MyCustomTabPage. Currently it adding the TabPage from windows.

Answer 1

You Need to do some steps, first define a class e.g MyCustomTabCollection and implement all Three Interfaces methods for your MyCustomTabCollection class, then Declare an instance of MyCustomTabCollection on your MyCustomTabControl as a public property.

Implement interfaces

public class MyCustomTabPageCollection : IList, ICollection, IEnumerable
{
    // implement all three interfaces
}

Implement all methods

public object this[int index] { get => throw new NotImplementedException(); set => throw new NotImplementedException(); }

public bool IsReadOnly => throw new NotImplementedException();

public bool IsFixedSize => throw new NotImplementedException();

public int Count => throw new NotImplementedException();

public object SyncRoot => throw new NotImplementedException();

public bool IsSynchronized => throw new NotImplementedException();

public int Add(object value)
{
    throw new NotImplementedException();
}

public void Clear()
{
    throw new NotImplementedException();
}

public bool Contains(object value)
{
    throw new NotImplementedException();
}

public void CopyTo(Array array, int index)
{
    throw new NotImplementedException();
}

public IEnumerator GetEnumerator()
{
    throw new NotImplementedException();
}

public int IndexOf(object value)
{
    throw new NotImplementedException();
}

public void Insert(int index, object value)
{
    throw new NotImplementedException();
}

public void Remove(object value)
{
    throw new NotImplementedException();
}

public void RemoveAt(int index)
{
    throw new NotImplementedException();
}

Declare your CustomTabPageCollection

public class MyCustomTab : TabControl
{
    public MyCustomTabPageCollection TabPages { get; set; }

    public MyCustomTab() : base()
    {
        base.Width = 200;
        base.Height = 100;

    }
}

If there is a problem yet, let me know.