Nhibernate reference pdf

Inserting data into Employees and EmployeeInfos. Configuration ;. BuildSessionFactory ;. OpenSession ;. BeginTransaction ;. ToString ;.

Save newUser ;. Commit ;. Close ;. The update operation includes two basic operations, such as adding EmpIds to dropdownlist and then updates the data. CreateCriteria typeof Employees. List ;. DataBind ;. Updating the data. Load typeof Employees , Convert. ToInt32 test ;. Load typeof EmployeeInfos , Convert. Text ;. Flush ;.

This is a simple operation where the gridview binds with the data source. View All. Using NHibernate. Diptimaya Patra Updated date Apr 05, Start a new project. Add reference to the NHibernate. Copy NHibernate. This step is optional if the files are copied automatically Now NHibernate is installed for the project.

Getting Started In our example we have created a web application with the following database design. Add NHibernate Schema definition in Web. Adding NHibernate Schema definition in Web. Mapping the Business Model Mapping is the heart of what NHibernate does, and it presents the greatest stumbling blocks for beginners. In the column's IdentitySpecification property, we specified that the column was the identity column that it should initialize at 1 and increment by the same value: So, what we need to do is this: Specify the identity property in the Employees class; Specify the record identity column in the Employee table; and Tell NHibernate to let SQL Server set the value of the EmpId column in the Employees table.

In this case, it is the Id property. In this case, it's the EmpId column. Adding Tables to project as class files This is a simple cs file which contains the properties of the respective table. Configuration ; cfg. Text; newUser. List ; ddlEmpId. DataBind ; session. ToString ; NHibernate. ToInt32 test ; txtFirstUpdate. ToString ; txtLastUpdate. ToString ; txtUpdateEmail.

Table per concrete class, using implicit polymorphism 9. Mixing implicit polymorphism with other inheritance mappings 9. Limitations Manipulating Persistent Data Creating a persistent object Loading an object Querying Scalar queries The IQuery interface Filtering collections Criteria queries Queries in native SQL Updating objects Updating in the same ISession Updating detached objects Reattaching detached objects Deleting persistent objects Flush Checking dirtiness Ending a Session Flushing the Session Committing the database transaction Closing the ISession Exception handling Lifecycles and object graphs Interceptors Metadata API Read-only entities Making persistent entities read-only Entities of immutable classes Loading persistent entities as read-only Making a persistent entity read-only Read-only affect on property type Simple properties Unidirectional associations Unidirectional one-to-one and many-to-one Unidirectional one-to-many and many-to-many Bidirectional associations Bidirectional one-to-one Bidirectional many-to-many Transactions And Concurrency Configurations, Sessions and Factories Threads and connections Considering object identity Optimistic concurrency control Long session with automatic versioning Many sessions with automatic versioning Customizing automatic versioning Application version checking Session disconnection Pessimistic Locking Connection Release Modes Transaction scopes System.

Transactions Interceptors and events Event system Batch processing Batch inserts The StatelessSession interface DML-style operations Case Sensitivity The from clause Associations and joins The select clause Aggregate functions Polymorphic queries The where clause Expressions The order by clause The group by clause Sub-queries HQL examples Criteria Queries Creating an ICriteria instance Narrowing the result set Ordering the results Associations Join entities without association Entity joins or ad hoc joins Dynamic association fetching Example queries Projections, aggregation and grouping Detached queries and sub-queries QueryOver Queries Structure of a Query Simple Expressions Additional Restrictions Aliases Projections Projection Functions Entities Projection Linq Queries Parameter types Supported methods and members Common methods DateTime and DateTimeOffset ICollection, non generic and generic IDictionary, non generic and generic Mathematical functions Nullables Strings Future results Fetching associations Modifying entities inside the database Inserting new entities Updating entities Deleting entities Query cache Extending the Linq to NHibernate provider Adding SQL functions Adding a custom generator Native SQL Entity queries Handling associations and collections Returning multiple entities Alias and property references Returning non-managed entities Handling inheritance Parameters Named SQL queries Using stored procedures for querying Custom SQL for create, update and delete Custom SQL for loading Filtering data NHibernate filters Improving performance Fetching strategies Working with lazy associations Tuning fetch strategies Single-ended association proxies Initializing collections and proxies Using batch fetching Using subselect fetching The Second Level Cache Cache mappings Strategy: read only Managing the caches The Query Cache Understanding Collection performance Taxonomy Lists, maps, idbags and sets are the most efficient collections to update Bags and lists are the most efficient inverse collections One shot delete Batch updates Query batch