DbProviderServices.DbDatabaseExists Method
Definition
Important
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Overloads
| DbDatabaseExists(DbConnection, Nullable<Int32>, StoreItemCollection) |
Returns a value indicating whether a given database exists on the server. |
| DbDatabaseExists(DbConnection, Nullable<Int32>, Lazy<StoreItemCollection>) |
Returns a value indicating whether a given database exists on the server. |
DbDatabaseExists(DbConnection, Nullable<Int32>, StoreItemCollection)
Returns a value indicating whether a given database exists on the server.
protected virtual bool DbDatabaseExists (System.Data.Common.DbConnection connection, Nullable<int> commandTimeout, System.Data.Entity.Core.Metadata.Edm.StoreItemCollection storeItemCollection);abstract member DbDatabaseExists : System.Data.Common.DbConnection * Nullable<int> * System.Data.Entity.Core.Metadata.Edm.StoreItemCollection -> bool
override this.DbDatabaseExists : System.Data.Common.DbConnection * Nullable<int> * System.Data.Entity.Core.Metadata.Edm.StoreItemCollection -> boolParameters
- connection
- DbConnection
Connection to a database whose existence is checked by this method.
Execution timeout for any commands needed to determine the existence of the database.
- storeItemCollection
- StoreItemCollection
The collection of all store items from the model. This parameter is no longer used for determining database existence.
Returns
True if the provider can deduce the database only based on the connection.
Applies to
DbDatabaseExists(DbConnection, Nullable<Int32>, Lazy<StoreItemCollection>)
Returns a value indicating whether a given database exists on the server.
protected virtual bool DbDatabaseExists (System.Data.Common.DbConnection connection, Nullable<int> commandTimeout, Lazy<System.Data.Entity.Core.Metadata.Edm.StoreItemCollection> storeItemCollection);abstract member DbDatabaseExists : System.Data.Common.DbConnection * Nullable<int> * Lazy<System.Data.Entity.Core.Metadata.Edm.StoreItemCollection> -> bool
override this.DbDatabaseExists : System.Data.Common.DbConnection * Nullable<int> * Lazy<System.Data.Entity.Core.Metadata.Edm.StoreItemCollection> -> boolProtected Overridable Function DbDatabaseExists (connection As DbConnection, commandTimeout As Nullable(Of Integer), storeItemCollection As Lazy(Of StoreItemCollection)) As BooleanParameters
- connection
- DbConnection
Connection to a database whose existence is checked by this method.
Execution timeout for any commands needed to determine the existence of the database.
- storeItemCollection
- Lazy<StoreItemCollection>
The collection of all store items from the model. This parameter is no longer used for determining database existence.
Returns
True if the provider can deduce the database only based on the connection.
Remarks
Override this method to avoid creating the store item collection if it is not needed. The default implementation evaluates the Lazy and calls the other overload of this method.
Applies to
Entity Framework