DBDataPermission serializable

DBDataPermission

serializable

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System.Data.Common (system.data.dll)

abstract class

DBDataPermission represents the security level access to a database. It's an abstract class (providers derive their own specific permission class), which allows you to ensure that the current user has required code access security permissions. For example, if you use the Demand( ) method before attempting to open a connection and the current user lacks the required security permissions, your code receives a System.Security.SecurityException to be handled gracefully. If you don't call Demand( ) , System.Security.SecurityException is still raised, but it won't occur until your code attempts the disallowed action.

Remember that this setting pertains only to code access security. It has to do with authentication. By default, any client running .NET code is allowed to open a connection. However, you can modify code access permissions (for example, denying users permission to use a connection string with a blank password) using the .NET Framework Configuration Tool.

You can also use the Deny( ) to programmatically revoke the client's ability to access the data source. This will remain in effect until the current method returns (and will apply to any methods further down the call stack).

 public abstract class  DBDataPermission  : System.Security.CodeAccessPermission , System.Security.Permissions         IUnrestrictedPermission {  // Public Constructors  public  DBDataPermission  (System.Security.Permissions.PermissionState   state   , bool   allowBlankPassword   );  // Protected Constructors  protected  DBDataPermission  (  );      protected  DBDataPermission  ( DBDataPermission   permission   );      protected  DBDataPermission  (DBDataPermissionAttribute   permissionAttribute   );    protected  DBDataPermission  (System.Security.Permissions.PermissionState   state   );  // Public Instance Properties  public bool  AllowBlankPassword  {set; get; }  // Public Instance Methods  public virtual void  Add  (string   connectionString   , string   restrictions   , System.Data.KeyRestrictionBehavior   behavior   );    public override IPermission  Copy  (  );  // overrides CodeAccessPermission  public override void  FromXml  (System.Security.SecurityElement   securityElement   );  // overrides CodeAccessPermission  public override IPermission  Intersect  (System.Security.IPermission   target   );  // overrides CodeAccessPermission  public override bool  IsSubsetOf  (System.Security.IPermission   target   );  // overrides CodeAccessPermission  public bool  IsUnrestricted  (  );  // implements IUnrestrictedPermission  public override SecurityElement  ToXml  (  );  // overrides CodeAccessPermission  public override IPermission  Union  (System.Security.IPermission   target   );  // overrides CodeAccessPermission   // Protected Instance Methods  protected void  Clear  (  );      protected virtual DBDataPermission  CreateInstance  (  );   } 

Hierarchy

System.Object System.Security.CodeAccessPermission(System.Security.IPermission, System.Security.ISecurityEncodable , System.Security.IStackWalk) DBDataPermission(System.Security.Permissions.IUnrestrictedPermission)

Subclasses

System.Data.OleDb.OleDbPermission , System.Data.SqlClient.SqlClientPermission