C # tab (tabcontrol) dynamically add tabpage (get or set the current tab and its attributes)

Create a winform program and drag a tabcontrol (delete two default tabpages in the tabpages attribute) and three buttons (add, delete, and modify)

1. Public partial class form1: Form
2. {
3. Private int Index = 0;
4. Public form1 ()
5. {
6. Initializecomponent ();
7. }
9. Private void form1_load (Object sender, eventargs E)
10. {
11. // This. tabcontrol1.selectedindex = 1;
12. }
14. Private void btnadd_click (Object sender, eventargs E)
15. {
16. Tabpage page = new tabpage ();
17. Page. Name = "page" + index. tostring ();
18. Page. Text = "tabpage" + index. tostring ();
19. Page. tabindex = index;
20. This. tabcontrol1.controls. Add (PAGE );
21.  
22. # Region three methods to set a tab as the current tab
23. // This. tabcontrol1.selectedindex = index;
24. This. tabcontrol1.selectedtab = page;
25. // This. tabcontrol1.selecttab ("page" + index. tostring ());
26. # Endregion
28. Index ++;
29. }
31. Private void btnremove_click (Object sender, eventargs E)
32. {
33. Bool first = true;
34. If (index> 0)
35. {
36. # Region two ways to delete a tab
37. This. tabcontrol1.controls. removeat (this. tabcontrol1.selectedindex );
38. // This. tabcontrol1.controls. Remove (this. tabcontrol1.tabpages [This. tabcontrol1.tabpages. Count-1]);
39. # Endregion
40. }
41. Else
42. {
43. Return;
44. }
45.  
46. # Region is used to delete the last tabpage and set the last and second to the current tab.
47. If (first)
48. {
49. This. tabcontrol1.selectedindex = -- index-1;
50. First = false;
51. }
52. Else
53. {
54. This. tabcontrol1.selectedindex = index --;
55. }
56. # Endregion
57. }
59. Private void btnupdate_click (Object sender, eventargs E)
60. {
61. This. tabcontrol1.selectedtab. Text = "xyt"; // modify the attributes of the current tab.
62. // This. tabcontrol1.selectedtab. Name = "";
63. // This. tabcontrol1.selectedtab. Tag = "";
64. // This. tabcontrol1.selectedtab. Select ();
65. }
66. }