Angular Persist and Export to Excel

[Gopi]

Grid retained as follows:

 

 this.state = gridSettings.state;
      this.grid.columns = gridSettings.columnsConfig.sort((a, b) => a.orderIndex - b.orderIndex);

 

After that "Export All" fails as the grid.Coulmns are changed to Array. If the grid.columns are QueryList it is exporting.