fill database table in wxListCtrl using wxThread- i can fill but system is going to hang

Firstly i make a program for showing table in wxListCtrl, it worked but for limited amount of data.. it shows a problem like:- when i execute the program . frame do the visible after some time... but it works then i turns to use wxThread now everthing is going fine, now when i execute the program frame immediately visible because i write Sleep(1000), so it add a line in wxListCtrl one by one , but it is giving unexpected result depend upon how many rows are in database.. my code is:-

# include "thread.h"
# include "login.h"
# include "sql.h"
# include <mysql.h>

class List_Ctrl_Data;

MyThread :: MyThread(login* login_obj)
{
     this->temp = login_obj;
}
void *MyThread :: Entry()
{
    int i=1,j,k=0   ;
    while(i!=100)
    {
            long index=this->temp->data_list_control->InsertItem(i,wxT("amit"));
            for(j=1;j<3;j++)
            {
               this->temp->data_list_control->SetItem(index,j,wxT("pathak"));
            }
            k++;
            if(k==1)
            {
                            k=10;
                       this->Sleep(1000);
            }
            i++;                                                
    }
}

here data_list_control is the object of wxListCtrl , with the help of thread i m filling value inside the wxListCtrl. some people advised me that here u r knocking frame 开发者_StackOverflow中文版control( wxListCtrl) again and again from thread entry , thats why frame getting hanged you should use wxPost or AddPendingRequest for this, i dont think that it would work, i tried to explain you my prob, still u feel to ask anything , u r welcome.. if you will help me, it would be a lot for me

The problems you are seeing are likely due to the fact that you are calling methods on a GUI control from a secondary thread rather than the main thread. This should never be done. You need to add the items from the main thread.

I'm guessing one of the reasons you have attempted to do this from a secondary thread is because it takes too long to add large number of items, and it's hanging your user interface. The correct approach is either to use a virtual list control (as noted in the "duplicate" question @Erik mentioned), or to periodically call wxYield (or wxSafeYield) while adding items so that UI events are processed.

********************************SOLUTION IS HERE******************

i used the code in thread like[ it get a row from database and pass to event] void *MyThread :: Entry()

{

    List_Ctrl_Data obj1 ;
    MYSQL_RES *database_table_data;
    database_table_data=obj1.getdata();
    MYSQL_ROW row;
    while((row=mysql_fetch_row(database_table_data))!=NULL)
        {

            wxCommandEvent event( wxEVT_COMMAND_TEXT_UPDATED, 100000 );
            void *row_data;
            row_data=(void *)row;
            event.SetClientData(row_data);
            temp->GetEventHandler()->AddPendingEvent( event );
            this->Sleep(1000);

        }


}

and for handling this we create a event table and a function to handle this value- void onNumberUpdate(wxCommandEvent& evt); private: DECLARE_EVENT_TABLE() in header file and in cpp file we write

void login::onNumberUpdate(wxCommandEvent& evt)

{

    int i=0,j;

    void* hold_row;

    hold_row=(void *)evt.GetClientData();

    MYSQL_ROW row;

    row=(MYSQL_ROW)hold_row;

    //while(row!=NULL)

    //{

        //wxPuts(wxT("kjhjkh"));

        const char* chars1 = row[0];

        wxString mystring1(chars1, wxConvUTF8);

        long index=data_list_control->InsertItem(this->counter,mystring1);
    this->counter++;

        for(j=1;j<3;j++)

            {

            const char* chars2=row[j];

            wxString mystring2(chars2,wxConvUTF8);

            data_list_control->SetItem(index,j,mystring2);
            }

    //}

}

BEGIN_EVENT_TABLE(login, wxFrame) EVT_COMMAND (100000, wxEVT_COMMAND_TEXT_UPDATED, login::onNumberUpdate)

END_EVENT_TABLE()

and finally i got the solution of my problem//////

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