Three-tier Architecture Experience

1. When modifying data:
1. The class attributes should be consistent with the parameter names of the class methods.
2. The datakeynames of the gridview control should be set as the primary key of the data table.
3. For variables with a guid structure, check whether the type of the updataparameters guid parameter of updatamethod in the objectdatasource object is an object. The designer may change it to a string (possibly. net2005 bug ).
Ii. When deleting data:
1. Use the designer to create an objectdatasource object and design the corresponding methods of select and delete.
2. For the delete method, if its parameter is a guid structure, the designer automatically sets the dataobjecttypename attribute of the objectdatasource object to system. guid, and the parameter is not correctly generated in deleteparameters (collection. Required: A. Delete the system. guid attribute value of dataobjecttypename. B. Add the object type parameter named primary key to the deleteparameters parameter set.
3. When adding data:
Generally, the formview control is used to remove the edit template. Only the insert template is used, and the defultmode of formview is set to insert.