ObjectContext.ExecuteStoreQuery<TEntity> Method (String, String, MergeOption, Object)
Executes a query directly against the data source and returns a sequence of typed results. Specify the entity set and the merge option so that query results can be tracked as entities.
Assembly: System.Data.Entity (in System.Data.Entity.dll)
public ObjectResult<TEntity> ExecuteStoreQuery<TEntity>( string commandText, string entitySetName, MergeOption mergeOption, params object parameters )
The command to execute, in the native language of the data source.
The entity set of the TResult type. If an entity set name is not provided, the results are not going to be tracked.
- Type: System.Data.Objects.MergeOption
An array of parameters to pass to the command.
Return ValueType: System.Data.Objects.ObjectResult< >
An enumeration of objects of type TResult.
The entity type of the returned data.
Themethod uses the existing connection to execute an arbitrary command directly against the data source. The store command is executed in the context of the current transaction, if such a transaction exists.
Calling the ExecuteStoreQuery<TElement> method is equivalent to calling the ExecuteReader method of the DbCommand class, only ExecuteStoreQuery<TElement> returns entities and the ExecuteReader returns property values in the DbDataReader.
Specify the entity set name, if you want for the results to be tracked as entities.
Using parameterized commands helps guard against SQL injection attacks, in which an attacker "injects" a command into a SQL statement that compromises security on the server. Parameterized commands guard against a SQL injection attack by guaranteeing that values received from an external source are passed as values only, and not part of the SQL statement. As a result, SQL commands inserted into a value are not executed at the data source. Rather, they are evaluated only as a parameter value. In addition to the security benefits, parameterized commands provide a convenient method for organizing values passed with a SQL statement or to a stored procedure.
The parameters value can be an array of DbParameter objects or an array of parameter values. If only values are supplied, an array of DbParameter objects are created based on the order of the values in the array.
For more information, see:
Available since 4.0