TextChanged event for dynamically created RichTextBoxes

Question

I'm trying to do a notepad with chrome-like tabs on it. I have a "New Page" button on my page. When I click on it, it creates a new tabpage with a richtexbox on it. The richboxes are created like this

public void yeni()
    {
        //create a new tabpage
        TabPage newPage = new TabPage("Not-" + (tabControl1.TabPages.Count + 1));

        //create a new richtexbox
        RichTextBox rtb = new RichTextBox();

        int rtbname = tabControl1.TabPages.Count + 1;
        rtb.Name = "richTextBox" + rtbname.ToString();
        rtb.Anchor = (AnchorStyles.Bottom | AnchorStyles.Right | AnchorStyles.Left | AnchorStyles.Top);
        rtb.BorderStyle = BorderStyle.None;
        rtb.Width = 778;
        rtb.Height = 395;
        rtb.Location = new Point(0, 4);
        rtb.HideSelection = false;
        rtb.Font = new Font("Lucida Console", 9.75f);
        rtb.ForeColor = Color.Maroon;

        //add rtb to the tabpage
        newPage.Controls.Add(rtb);
        tabControl1.TabPages.Add(newPage);

        //make the new created tab the selected one
        tabControl1.SelectedTab = tabControl1.TabPages[tabControl1.TabPages.Count - 1];

        //selectedRtb.Text = null;
        openFileDialog1.FileName = null;
    }

Now I create a RichTextBox and the name of that rtb is richTextBox*indexofthetabhere*. So if I'm working on the second tabpage, the name of the rtb is "richTextBox2". Now what I'm trying to do is I want an textchanged event for the richtextbox on the selected tabpage. I'm getting the selected richtextbox with this code here.

private void tabControl1_SelectedIndexChanged(object sender, EventArgs e)
    {

        selectedone = "richTextBox" + (tabControl1.SelectedIndex+1).ToString();


            selectedRtb = (RichTextBox)tabControl1.SelectedTab.Controls[selectedone];
            textBox2.Text = selectedone;
    }

Now here I get the selected tab index and i get the rtb name then I get the selected rtb as "selectedRtb". Now I can't make a textchanged event for this. I don't know what to do actually. I tested if the above code was working and yes I get the rtb names right. But I can't use them because I don't know how to do.. Thanks for the help.

Answer 1

    public void yeni()
    {
       //....
       RichTextBox rtb = new RichTextBox();
       rtb.Name = "richTextBox" + selectedTabPageIndex.ToString();
       rtb.TextChanged += rtb_TextChanged;
        //....    
     }



     void rtb_TextChanged(object sender, EventArgs e)
     {
          RichTextBox rtb = (RichTextBox)sender;

          if (rtb.Name == "richTextBox" + selectedTabPageIndex.ToString())
          {
              //rtb is selected page richtextbox
              //......
          }
      }