'DatagridView new row shows empty values

I have a problem with my datagridView, i have datagrid that have binding with class book and my text boxses and cmb have a binding with data source update mode on porperty change. after i adding a book i query my db again and show the updated table on the datagridView. when i add a new book i getting new row in the datagrid but the values are empty while checking the db on sql server shows me that the book was added with all of his values and when i run the program again the new row suddenly do have the values and not empty. is anyone know what is the problem?



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