BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Re: Generate field(s) definition as Field Editor's "Add All          BorlandTalk.com Forum Index -> Delphi Databases (Multi-Tier) View previous topic :: View next topic   Author Message Dave Rowntree Guest Posted: Fri Aug 22, 2003 4:08 pm    Post subject: Re: Generate field(s) definition as Field Editor's "Add All Nelson Chui <nelson_chui (AT) yahoo (DOT) com> wrote: Quote: In my program, there will be changed a TDataSet's Select SQL in run-time (incl. Fields and Base Table). Moreover, I also use a ClientDataSet with this TDataSet for data processing. Therefore, I need to how the changes in Select SQL statement and redefine the definition of TDataSet and ClientDataSet for some reasons ( For example : CDS.RefreshRecord proceesing will need to set Key Fields's ProviderFlags with pfInKey value on TDataSet before Open CDS ). The main place the ProviderFlags have any meaning is on the DSP.DataSet. Setting them on a client-side CDS has no effect on anything. You don't have to set them before opening the DSP.DataSet. A good place to set them is in the DSP.DataSet.AfterOpen event. If you set them when data is being requested from the DSP by CDS.Open, you can forget about them after that. The settings are then passed to the CDS (maintained by MIDAS on behalf of your CDS) but you don't see them. They are then automatically passed back the the DSP as and when needed by such methods as ApplyUpdates, RefreshRecord, etc. Quote: But, I don't know how to code the function as same as TDataSet's "Field Editor" popup menu - "Add All Fields" function. You don't have to create persistent fields if you don't want to. MIDAS will create the fields for you, then you can set any field settings you like (ProviderFlags, default expressions, DisplayLabel, etc) in the AfterOpen event. -- Dave Rowntree Back to top Nelson Chui Guest Posted: Thu Aug 28, 2003 7:06 am    Post subject: Re: Generate field(s) definition as Field Editor's "Add All Dave, By your suggestion, I fix my problem. Thank you VERY MUCH for your help !!! Regards, Nelson. 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