patch

Author: NickVolynkin

README.md

@@ -180,6 +180,30 @@ begin
 end;
 ```
 
+### Step 6: Persist Data between Application Sessions
+
+This step is applicable only to the memory-based [TdxMemData] datasource.
+
+To save the dataset to a file and restore data on app restart,
+handle `OnCreate` and `OnDestroy` events of the data module:
+
+```pas
+const
+  DataFileName = 'data.dat';
+
+procedure TDataModule1.DataModuleCreate(Sender: TObject);
+begin
+  if FileExists(DataFileName) then
+    mdLayouts.LoadFromBinaryFile(DataFileName)
+end;
+
+procedure TDataModule1.DataModuleDestroy(Sender: TObject);
+begin
+  if mdLayouts.RecordCount > 0 then
+    mdLayouts.SaveToBinaryFile(DataFileName)
+end;
+```
+
 ## Files to Review
 
 - [uData.pas]/[uData.cpp] stores dashboard layouts and supplies data to the dashboard.