I have created dataset using my-sql database and connection string well . simply created get method for table adapter . After i have tried to create query for insert , update , delete using add query and tested using ui that the query is in correct syntax , so , that row was affected . After that i have created objectdatasource at default.aspx . Set select method to get method , insert , update , delete method to the configured method at the table adapter . but when i try to insert , update , delete than error shows that object datasource could not find method insert . What is the solution .