FireDAC.Comp.DataSet.TFDMasterDataLink.DisableScroll
| [–] Properties | |
|---|---|
| Type: procedure function
| |
| Visibility: public | |
| Source: FireDAC.Comp.DataSet.pas FireDAC.Comp.DataSet.hpp
| |
| Unit: FireDAC.Comp.DataSet | |
| Parent: TFDMasterDataLink | |
Delphi
procedure DisableScroll;
C++
void __fastcall DisableScroll();
Description
Disables refreshing of a detail dataset.
Call the DisableScroll method of the detail dataset's MasterLink property to disable the refresh of the detail dataset.
The DisableControls method of the master dataset disables all master dataset "feedback". The DisableScroll method allows you to turn off detail dataset refreshing of a single detail dataset.
To re-enable detail dataset refresh, use the EnableScroll method. The DisableScroll / EnableScroll method calls must be in pairs and can be nested. FireDAC uses the counter to track DisableScroll / EnableScroll nested calls. The topmost call of the EnableScroll method synchronizes the detail dataset with its master dataset, if they are out of sync.
Example
qDetail.MasterLink.DisableScroll;
try
qMaster.First;
while not qMaster.Eof do begin
if qMaster.Fields[i].AsInteger = 100 then begin
qDetail.ApplyMaster;
// read qDetail dataset - it is synchronized with qMaster
end;
qMaster.Next;
end;
finally
qDetail.MasterLink.EnableScroll;
end;