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autogeneration

Autogeneration is set to particular field.example group code.
after i delete or update that rows. the group code is not updated.
Apr 7 '08 #1
4 1485
balame2004
142 100+
Hi Shalini,

We can not explicitly set the value to a field which is declared as autogenration key. Value is automatically generated by the database itself.

Regards,
Balaji U
Apr 7 '08 #2
hi

I need to populate the respective states from the states dropdownlist when a user chooses a country from the country dropdownlist. Similary when the state is selected from the states dropdownlist the corresponding cities should get displayed in the cities dropdownlistbox. Pls provide me with the coding? Here is the following code which i developed.

example(c#.net)
Expand|Select|Wrap|Line Numbers
  1. Private Sub fillcountry()
  2.         ddlcountry.Items.Add("India")
  3.         ddlcountry.Items.Add("UK")
  4.         ddlcountry.Items.Add("USA")
  5.         ddlcountry.Items.Add("Germany")
  6.     End Sub
  7.     Private Sub fillstate()
  8.         'list of states in india
  9.         ddlstate.Items.Add("Tamilnadu")
  10.         ddlstate.Items.Add("AndhraPradesh")
  11.         ddlstate.Items.Add("Kerela")
  12.         ddlstate.Items.Add("MadhyaPradesh")
  13.         'list of states in UK
  14.         ddlstate.Items.Add("Yorkshire")
  15.         ddlstate.Items.Add("London")
  16.         ddlstate.Items.Add("Surrey")
  17.         ddlstate.Items.Add("Manchestershire")
  18.         'list of states in USA
  19.         ddlstate.Items.Add("Florida")
  20.         ddlstate.Items.Add("California")
  21.         ddlstate.Items.Add("Atlanta")
  22.         ddlstate.Items.Add("Chicago")
  23.         'list of states in Germany
  24.         ddlstate.Items.Add("Berlin")
  25.         ddlstate.Items.Add("Hamberg")
  26.         ddlstate.Items.Add("Frankfurt")
  27.         ddlstate.Items.Add("Munich")
  28.     End Sub
  29.     Private Sub fillcity()
  30.         'list of cities in india
  31.         ddlstate.Items.Add("Mumbai")
  32.         ddlstate.Items.Add("Chennai")
  33.         ddlstate.Items.Add("Kolkatta")
  34.         ddlstate.Items.Add("Delhi")
  35.         'list of cities in UK
  36.         ddlstate.Items.Add("Yorkshire")
  37.         ddlstate.Items.Add("London")
  38.         ddlstate.Items.Add("Surrey")
  39.         ddlstate.Items.Add("Manchestershire")
  40.         'list of cities in USA
  41.         ddlstate.Items.Add("Florida")
  42.         ddlstate.Items.Add("California")
  43.         ddlstate.Items.Add("Atlanta")
  44.         ddlstate.Items.Add("Chicago")
  45.         'list of cities in Germany
  46.         ddlstate.Items.Add("Berlin")
  47.         ddlstate.Items.Add("Hamberg")
  48.         ddlstate.Items.Add("Frankfurt")
  49.         ddlstate.Items.Add("Munich")
  50.     End Sub
pls help me
Apr 15 '08 #3
balame2004
142 100+
hi

I need to populate the respective states from the states dropdownlist when a user chooses a country from the country dropdownlist. Similary when the state is selected from the states dropdownlist the corresponding cities should get displayed in the cities dropdownlistbox. Pls provide me with the coding? Here is the following code which i developed.

example(c#.net)

Private Sub fillcountry()
ddlcountry.Items.Add("India")
ddlcountry.Items.Add("UK")
ddlcountry.Items.Add("USA")
ddlcountry.Items.Add("Germany")
End Sub
Private Sub fillstate()
'list of states in india
ddlstate.Items.Add("Tamilnadu")
ddlstate.Items.Add("AndhraPradesh")
ddlstate.Items.Add("Kerela")
ddlstate.Items.Add("MadhyaPradesh")
'list of states in UK
ddlstate.Items.Add("Yorkshire")
ddlstate.Items.Add("London")
ddlstate.Items.Add("Surrey")
ddlstate.Items.Add("Manchestershire")
'list of states in USA
ddlstate.Items.Add("Florida")
ddlstate.Items.Add("California")
ddlstate.Items.Add("Atlanta")
ddlstate.Items.Add("Chicago")
'list of states in Germany
ddlstate.Items.Add("Berlin")
ddlstate.Items.Add("Hamberg")
ddlstate.Items.Add("Frankfurt")
ddlstate.Items.Add("Munich")
End Sub
Private Sub fillcity()
'list of cities in india
ddlstate.Items.Add("Mumbai")
ddlstate.Items.Add("Chennai")
ddlstate.Items.Add("Kolkatta")
ddlstate.Items.Add("Delhi")
'list of cities in UK
ddlstate.Items.Add("Yorkshire")
ddlstate.Items.Add("London")
ddlstate.Items.Add("Surrey")
ddlstate.Items.Add("Manchestershire")
'list of cities in USA
ddlstate.Items.Add("Florida")
ddlstate.Items.Add("California")
ddlstate.Items.Add("Atlanta")
ddlstate.Items.Add("Chicago")
'list of cities in Germany
ddlstate.Items.Add("Berlin")
ddlstate.Items.Add("Hamberg")
ddlstate.Items.Add("Frankfurt")
ddlstate.Items.Add("Munich")
End Sub

pls help me

Hi,

Try this:

Expand|Select|Wrap|Line Numbers
  1. //Global Variable
  2. private static DataTable CountryStateCityTable=new DataTable();
  3.  
  4.  
  5. page_load(...)
  6. {
  7.  
  8. //Setting autopostback property to true so page is posted back to the server whenever an event is being fired.
  9. this.CountryListBox.AutoPostBack=true;
  10. this.StateListBox.AutoPostBack=true;
  11. this.CityListBox.AutoPostBack=true;
  12.  
  13. //City,State,Country
  14.  
  15. CountryStateCityTable.Columns.Add("Country");
  16. CountryStateCityTable.Columns.Add("State");
  17. CountryStateCityTable.Columns.Add("City");            
  18.  
  19. CountryStateCityTable.Rows.Add(new string[]{"India","Tamilnadu","Chennai"});
  20. CountryStateCityTable.Rows.Add(new string[]{"India","Tamilnadu","Vellore"});
  21. CountryStateCityTable.Rows.Add(new string[]{"India","Tamilnadu","Koimbotore"});
  22. CountryStateCityTable.Rows.Add(new string[]{"India","Tamilnadu","Madurai"});
  23. CountryStateCityTable.Rows.Add(new string[]{"India","Tamilnadu","Thiruchy"});
  24. CountryStateCityTable.Rows.Add(new string[]{"India","Kerala","Cochin"});
  25. CountryStateCityTable.Rows.Add(new string[]{"India","Kerala","Ernakulam"});
  26. CountryStateCityTable.Rows.Add(new string[]{"India","Kerala","Kolikode"});
  27. CountryStateCityTable.Rows.Add(new string[]{"India","Karnataka","Bangalore"});
  28. CountryStateCityTable.Rows.Add(new string[]{"India","Karnataka","Mysore"});
  29. CountryStateCityTable.Rows.Add(new string[]{"India","Karnataka","Mangalore"});
  30.  
  31. CountryStateCityTable.Rows.Add(new string[]{"United States","New Jercy","New York"});
  32. CountryStateCityTable.Rows.Add(new string[]{"United States","New Jercy","North Carolina"});
  33. CountryStateCityTable.Rows.Add(new string[]{"United States","Colambia","Colambia City"});
  34. CountryStateCityTable.Rows.Add(new string[]{"United States","Washington","Washington"});
  35. CountryStateCityTable.Rows.Add(new string[]{"Pakistan","Sindhu","Islamabad"});
  36. CountryStateCityTable.Rows.Add(new string[]{"Pakistan","Balusistan","Peshavur"});
  37. CountryStateCityTable.Rows.Add(new string[]{"Pakistan","Balusistan","Hyderabad"});
  38. CountryStateCityTable.Rows.Add(new string[]{"Pakistan","Punjab","Karachi"});
  39.  
  40.  
  41. this.CountryListBox.DataSource=new DataView(this.CountryStateCityTable).ToTable(true,"Country").DefaultView;
  42. this.CountryListBox.ValueMember="Country";
  43. this.CountryListBox.DisplayMember="Country";
  44.  
  45. }
  46.  
  47.  
  48.  
  49.  
  50. private void StateListBox_SelectedValueChanged(...)
  51. {
  52.     try
  53.     {
  54.         DataView view=new DataView(this.CountryStateCityTable);
  55.         view.RowFilter="Country='"+this.CountryListBox.SelectedItem.Text+"' AND State='"+this.StateListBox.SelectedItem.Text+"'";            
  56.         this.CityListBox.DataSource=viewToTable(true,"City").DefaultView;;
  57.         this.CityListBox.DisplayMember="City";
  58.         this.CityListBox.ValueMember="City";
  59.     }
  60.     catch(Exception exc)
  61.     {
  62.               Responce.Write(exc.Message);
  63.     }
  64. }
  65.  
  66. private void CountryListBox_SelectedValueChanged(...)
  67. {
  68.        try
  69.     {
  70.         DataView view=new DataView(this.CountryStateCityTable);
  71.             view.RowFilter="Country='"+this.CountryListBox.SelectedItem.Text+"'";        
  72.         this.StateListBox.DataSource=view.ToTable(true,"State").DefaultView;
  73.         this.StateListBox.DisplayMember="State";
  74.         this.StateListBox.ValueMember="State";
  75.     }
  76.     catch(Exception exc)
  77.     {
  78.            Responce.Write(exc.Message);
  79.     }
  80. }
  81.  
  82.  

- Balaji U
Apr 16 '08 #4
balame2004
142 100+
I have added IsPostBack condition here.



Expand|Select|Wrap|Line Numbers
  1. //Global Variable
  2. private static DataTable CountryStateCityTable=new DataTable();
  3.  
  4.  
  5. page_load(...)
  6. {
  7.  
  8. if(!IsPostBack)
  9. {
  10. //Setting autopostback property to true so page is posted back to the server whenever an event is being fired.
  11. this.CountryListBox.AutoPostBack=true;
  12. this.StateListBox.AutoPostBack=true;
  13. this.CityListBox.AutoPostBack=true;
  14.  
  15. //City,State,Country
  16.  
  17. CountryStateCityTable.Columns.Add("Country");
  18. CountryStateCityTable.Columns.Add("State");
  19. CountryStateCityTable.Columns.Add("City");            
  20.  
  21. CountryStateCityTable.Rows.Add(new string[]{"India","Tamilnadu","Chennai"});
  22. CountryStateCityTable.Rows.Add(new string[]{"India","Tamilnadu","Vellore"});
  23. CountryStateCityTable.Rows.Add(new string[]{"India","Tamilnadu","Koimbotore"});
  24. CountryStateCityTable.Rows.Add(new string[]{"India","Tamilnadu","Madurai"});
  25. CountryStateCityTable.Rows.Add(new string[]{"India","Tamilnadu","Thiruchy"});
  26. CountryStateCityTable.Rows.Add(new string[]{"India","Kerala","Cochin"});
  27. CountryStateCityTable.Rows.Add(new string[]{"India","Kerala","Ernakulam"});
  28. CountryStateCityTable.Rows.Add(new string[]{"India","Kerala","Kolikode"});
  29. CountryStateCityTable.Rows.Add(new string[]{"India","Karnataka","Bangalore"});
  30. CountryStateCityTable.Rows.Add(new string[]{"India","Karnataka","Mysore"});
  31. CountryStateCityTable.Rows.Add(new string[]{"India","Karnataka","Mangalore"});
  32.  
  33. CountryStateCityTable.Rows.Add(new string[]{"United States","New Jercy","New York"});
  34. CountryStateCityTable.Rows.Add(new string[]{"United States","New Jercy","North Carolina"});
  35. CountryStateCityTable.Rows.Add(new string[]{"United States","Colambia","Colambia City"});
  36. CountryStateCityTable.Rows.Add(new string[]{"United States","Washington","Washington"});
  37. CountryStateCityTable.Rows.Add(new string[]{"Pakistan","Sindhu","Islamabad"});
  38. CountryStateCityTable.Rows.Add(new string[]{"Pakistan","Balusistan","Peshavur"});
  39. CountryStateCityTable.Rows.Add(new string[]{"Pakistan","Balusistan","Hyderabad"});
  40. CountryStateCityTable.Rows.Add(new string[]{"Pakistan","Punjab","Karachi"});
  41.  
  42.  
  43. this.CountryListBox.DataSource=new DataView(this.CountryStateCityTable).ToTable(true,"Country").DefaultView;
  44. this.CountryListBox.ValueMember="Country";
  45. this.CountryListBox.DisplayMember="Country";
  46. }
  47. }
  48.  
  49.  
  50.  
  51.  
  52. private void StateListBox_SelectedValueChanged(...)
  53. {
  54.     try
  55.     {
  56.         DataView view=new DataView(this.CountryStateCityTable);
  57.         view.RowFilter="Country='"+this.CountryListBox.SelectedItem.Text+"' AND State='"+this.StateListBox.SelectedItem.Text+"'";            
  58.         this.CityListBox.DataSource=viewToTable(true,"City").DefaultView;;
  59.         this.CityListBox.DisplayMember="City";
  60.         this.CityListBox.ValueMember="City";
  61.     }
  62.     catch(Exception exc)
  63.     {
  64.               Responce.Write(exc.Message);
  65.     }
  66. }
  67.  
  68. private void CountryListBox_SelectedValueChanged(...)
  69. {
  70.        try
  71.     {
  72.         DataView view=new DataView(this.CountryStateCityTable);
  73.             view.RowFilter="Country='"+this.CountryListBox.SelectedItem.Text+"'";        
  74.         this.StateListBox.DataSource=view.ToTable(true,"State").DefaultView;
  75.         this.StateListBox.DisplayMember="State";
  76.         this.StateListBox.ValueMember="State";
  77.     }
  78.     catch(Exception exc)
  79.     {
  80.            Responce.Write(exc.Message);
  81.     }
  82. }
  83.  
  84.  

- Balaji U
Apr 16 '08 #5

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