[Gtk-sharp-list] Combobox clear and reload

[henkdp]

Michael Hutchinson wrote:
> 
> On Thu, Oct 9, 2008 at 12:58 PM, henkdp <henk at bbd.co.za> wrote:
>>
>> Good day,
>>
>> I am a total newbie to Monodevelop Stetic and GTK#. :blush: I have
>> searched
>> high and low on the internet and this forum, don't know if I am looking
>> for
>> wrong key words but here is my problem.
>>
>> I want to create a ComboBoxEntry widget with employees in it, I populate
>> it
>> with values from the database, nothing fancy and I managed that. However,
>> when a new employee is added I want to clear the ComboBoxEntry and
>> recreate
>> it, I don't just want to append the new value at the bottom.
>>
>> Here, to explain is a snippet of my code loading the ComboboxEntry:
>>
>>   protected void LoadEmployeeCombo()
>>   {
>>      //Load the employee details
>>
>>      DataTable datatableEmployeeDropDown =
>> business.StartUpLoadEmployeeDetails();
>>      foreach  (DataRow  r in datatableEmployeeDropDown.Rows )
>>      {
>>         string empnumber = r["empnumber"].ToString();
>>
>>         string nickname = r["nickname"].ToString();
>>         string trim_nickname = nickname.Trim();
>>
>>         string surname = r["surname"].ToString();
>>         string trim_surname = surname.Trim();
>>
>>         string employeeNumberAndName = ( empnumber + " - " +
>> trim_nickname
>> + " " + trim_surname );
>>
>>         HTEmpNocomboboxentry.AppendText( employeeNumberAndName );
>>      }
>>
>>      //Add this to the top of the combo entry box for when a new employee
>> is needed
>>      HTEmpNocomboboxentry.PrependText("New - type new employee number "
>> );
>>
>>   }
>>
>> As I said nothing fancy and you can see from the code I am a real newbie!
> 
> You may need to delve into the more advanced aspects of the
> TreeView/TreeModel system.
> 
> //create a list store with one column, of type string, and set it to
> be our combo's model
> ListStore model = new ListStore (typeof (string));
> combo.Model = model;
> 
> //create a text renderer and add it to the combo box
> //note that you can pack in multiple renderers, e.g. an icon renderer
> CellRendererText textRenderer = new CellRendererText ();
> combo.PackStart (textRenderer, true);
> 
> //map the "text" property of the renderer to column 0 in the model
> //note that you can map any columns in the model to any properties of
> the renderer
> combo.AddAttribute (textRenderer, "text", 0);
> 
> //add some values to the model
> model.AddValues ("foo");
> 
> //clear the model
> model.Clear ();
> 
> These same principles apply to the TreeView.
> 
> -- 
> Michael Hutchinson
> http://mjhutchinson.com
> _______________________________________________
> Gtk-sharp-list maillist  -  Gtk-sharp-list at lists.ximian.com
> http://lists.ximian.com/mailman/listinfo/gtk-sharp-list
> 
> 

Thank you very much Michael, I tried it and it works.  Much appreciated.

Henk du Plessis

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