Anwendung friert bei SQL ein

[schuetze09]

@Lemmy: Jasucol hat es genau auf den Punkt getroffen. Das ist es was ich meine.

@All:

Einen anscheinend geeigneten Thread habe ich dazu auch schon, jedoch funktioniert die Übergabe der Daten zur Anwendung noch nicht:

Delphi-Quellcode:

  unit SQLThread;
  
  interface
  
  uses
    Classes, ADODB, ComObj, ActiveX, SysUtils,
    Funktionen, Dialogs;
  
  type
    TSQLThread = class(TThread)
    private
      FQType : string;
      FQSQL : string;
      Fqry : TADOQuery;
      Fcmd : TADOCommand;
      FExceptionMessage: string;
      function GetConnectionString: String;
      procedure DoDataToVCL_VST;
    published
      property QType: string read FQType write FQType;
      property QSQL: string read FQSQL write FQSQL;
      property qry: TADOQuery read Fqry write Fqry;
      property cmd: TADOCommand read Fcmd write Fcmd;
    protected
      procedure Execute; override;
    public
  //    constructor Create(OnTerminate: TNotifyEvent);
      constructor Create;
      destructor Destroy; override;
      property ExceptionMessage: string read FExceptionMessage;
    end;
  
  implementation
  
  uses main;
  //------------------------------------------------------------------------------
  //constructor TSQLThread.Create(OnTerminate: TNotifyEvent);
  constructor TSQLThread.Create;
  begin
    inherited Create(True);
  //  Self.OnTerminate:=OnTerminate;
  //  FreeOnTerminate:=True;
    Resume;
  end;
  //------------------------------------------------------------------------------
  destructor TSQLThread.Destroy;
  begin
    Free;
  end;
  //------------------------------------------------------------------------------
  procedure TSQLThread.Execute;
  Var
    qry : TADOQuery;
    cmd : TADOCommand;
  begin
    { Place thread code here }
    try
      CoInitialize(nil);
      try
        if QType = 'qry' then
        begin
          qry:=TADOQuery.Create(nil);
          try
            qry.ConnectionString := GetConnectionString;
            qry.CommandTimeout := 3000;
            qry.SQL.Clear;
            qry.SQL.Text := QSQL;
            qry.Open;
            while not qry.Eof do
            begin
              //Verarbeitung mit der Anwendung - Daten zur Anwendung schicken
              //  Synchronize(DoDataToVCL_VST);
                qry.Next;
            end;
            qry.Close;
          finally
            qry.Free;
          end;
        end else
        begin
          cmd := TADOCommand.Create(nil);
          try
            cmd.ConnectionString := GetConnectionString;
            cmd.CommandTimeout := 3000;
            cmd.CommandText := QSQL;
            cmd.Execute;
          finally
            cmd.Free;
          end;
        end;
      finally
        CoUnInitialize;
      end;
    except
      on E: Exception do FExceptionMessage:=E.Message;
    end;
  end;
  //------------------------------------------------------------------------------
  function TSQLThread.GetConnectionString: string ;
  var ConnectionString: WideString;
  begin
    ConnectionString:='Provider=MSDAORA.1;'+
                      'Password=xxxxx;'+
                      'User ID=xxxxx;'+
                      'Data Source=xxxxx;'+
                      'Persist Security Info= true';
    Result:=ConnectionString;
  end;
  //------------------------------------------------------------------------------
  procedure TSQLThread.DoDataToVCL_VST;
  begin
    Form_Main.StatusBar.Panels[0].Text:='Test';
    Form_Main.StatusBar.Update;
  end;
end.

Vielleicht gibt es ja dazu ein paar Tipps?

MfG
schuetze09