Collecting Data from web parts and submitting to back end using C#

There can be scenarios, wherein you may have to collect data from various web parts in a page and submit to back end. One solution will be to use Connected Web parts feature. Or the sample code below also will help to achieve this;

1) Define one base class

public abstract class IBaseForm : WebPart
    {

    }

2) Implement this class in all the web parts whose data need to be collected

public class InputForm2 : IBaseForm
    {
        protected override void CreateChildControls()
        {
            base.CreateChildControls();
            TextBox t1 = new TextBox();
            t1.ID = "LastName";
            t1.Text = "Last Name";
            this.Controls.Add(t1);
        }
    }

3) This is the piece of code which will collect the data from all the web parts which implement the base class

public class SubmitButton : WebPart
    {
        TextBox t1 = new TextBox();
        protected override void CreateChildControls()
        {
            base.CreateChildControls();
            Button b1 = new Button();
            b1.ID = "submitData";
            b1.Text = "Submit Data";
            b1.Click += new EventHandler(b1_Click);
            this.Controls.Add(b1);

            t1.ID = "result";
            this.Controls.Add(t1);
        }

        void b1_Click(object sender, EventArgs e)
        {
            t1.Text = string.Empty;
            System.Web.UI.ControlCollection colls = this.Parent.Controls;
            IEnumerable bf= colls.OfType();
            foreach (IBaseForm f in bf)
            {
                t1.Text = t1.Text + GetValue(f);
            }
        }

        string GetValue(IBaseForm f)
        {
            string res = string.Empty;
            TextBox t = default(TextBox);

            foreach (System.Web.UI.Control c in f.Controls)
            {
                if (c.GetType().Equals(typeof(TextBox)))
                    t = c as TextBox;
                break;
            }
            res = t.Text;
            return res;
        }
    }