Collectives on Stack Overflow. Learn more. Handling null values in OracleCommand parameters Ask Question. Asked 12 years, 5 months ago. Active 4 years, 6 months ago. Viewed 29k times. Add "newcid", OracleDbType. ReturnValue ; cmd.
ToString ; cmd. Dispose ;. Dan U. Add a comment. Active Oldest Votes. Andrew Hare Andrew Hare k 68 68 gold badges silver badges bronze badges.
The answer from Andrew Hare is bogus like Dan U. It's System. Value — Dr. DBNull can not be assigned to any other data type so have to implicit convert it to object. Value : object DBNull. Value; where s. This browser is no longer supported.
Download Microsoft Edge More info. Contents Exit focus mode. Oracle Parameter. Value Property Reference Is this page helpful? Please rate your experience Yes No. Any additional feedback? Namespace: System. OracleClient Assembly: System. Gets or sets the value of the parameter.
The provider attempts to convert any type of value if it supports the IConvertible interface. Conversion errors occur if the specified type is not compatible with the value. When sending a null parameter value to the database, the user must specify DBNull , not null.
The null value in the system is an empty object that has no value. DBNull is used to represent null values. The user can also specify a null value by setting Status to OracleParameterStatus. In this case, the provider sends a null value to the database. Please see the following for related information:. Converted to the data type specified in OracleDbType or DbType when the provider sends the data to the database.
Input parameter - Value should be set to an array of values. ArrayBindCount should be set to a value that is greater than zero to indicate the number of elements to be bound. The number of elements in the array should be equal to the OracleCommand. ArrayBindCount property; otherwise, their minimum value is used to bind the elements in the array.
Output parameter - OracleCommand. Input parameter — Value should be set to an array of values. CollectionType should be set to OracleCollection. If Size is smaller than the number of elements in Value , then Size specifies the number of elements in the Value property to be bound. Output parameter - CollectionType should be set to OracleCollection.
Each parameter should have a value. To bind a parameter with a null value, set Value to DBNull. Value , or set Status to OracleParameterStatus. This method resets the type associated with the parameter so that it can infer its type from the value passed in the parameter. If an application does not set the DbType or OracleDbType properties of an OracleParameter object, then these values are inferred from the value set by the application to that OracleParameter object.
Calling ResetDbType method resets these properties so that OracleParameter can again infer its type from the value passed into the OracleParameter. Calling the ResetOracleDbType method resets these properties so that OracleParameter can again infer its type from the value passed into the OracleParameter. Class Inheritance System. Object System. MarshalByRefObject System. DbParameter ADO. NET 2. Exceptions ArgumentException - The type binding is invalid. Data; using Oracle. Client; using Oracle.
CreateCommand ; cmd. Parse cmd. Add "paramEmpno", OracleDbType. Add "paramEname", OracleDbType. Varchar2, "Client", ParameterDirection. Decimal, 10, ParameterDirection. Input ; cmd. ExecuteNonQuery ; Console. Client Assembly: Oracle.
NET for. NET Framework 2. OracleParameter Members OracleParameter members are listed in the following tables. Object Overloaded. DbType enumeration type Direction Specifies whether the parameter is input-only, output-only, bi-directional, or a stored function return value parameter IsNullable Not supported Offset Specifies the offset to the Value property or offset to the elements in the Value property OracleDbType Specifies the Oracle data type OracleDbTypeEx Specifies the Oracle data type to bind the parameter as, but returns a.
NET type as output ParameterName Specifies the name of the parameter Precision Specifies the maximum number of digits used to represent the Value property Scale Specifies the number of decimal places to which Value property is resolved Size Specifies the maximum size, in bytes or characters, of the data transmitted to or from the database.
See Also: "Oracle. Client Namespace" OracleParameter Class. OracleParameter string, OracleDbType This constructor instantiates a new instance of OracleParameter class using the supplied parameter name and Oracle data type. OracleParameter string, object This constructor instantiates a new instance of the OracleParameter class using the supplied parameter name and parameter value. OracleParameter string, OracleDbType, ParameterDirection This constructor instantiates a new instance of the OracleParameter class using the supplied parameter name, data type, and parameter direction.
OracleParameter string, OracleDbType, object, ParameterDirection This constructor instantiates a new instance of the OracleParameter class using the supplied parameter name, data type, value, and direction. OracleParameter string, OracleDbType, int This constructor instantiates a new instance of the OracleParameter class using the supplied parameter name, data type, and size.
OracleParameter string, OracleDbType, int, string This constructor instantiates a new instance of the OracleParameter class using the supplied parameter name, data type, size, and source column. OracleParameter string, OracleDbType, int, ParameterDirection, bool, byte, byte, string, DataRowVersion, object This constructor instantiates a new instance of the OracleParameter class using the supplied parameter name, data type, size, direction, null indicator, precision, scale, source column, source version and parameter value.
OracleParameter string, OracleDbType, int, object, ParameterDirection This constructor instantiates a new instance of the OracleParameter class using the supplied parameter name, data type, size, value, and direction. OracleParameter This constructor instantiates a new instance of OracleParameter class.
Unless explicitly set in the constructor, all the properties have the default values. Remarks Unless explicitly set in the constructor, all the properties have the default values. Exceptions ArgumentException - The supplied value does not belong to the type of Value property in any of the OracleType s.
ArrayBindSize This property specifies the maximum size, in bytes or characters, of the data for each array element transmitted to or from the database. Dispose ; prm[1]. Dispose ; prm[2]. Dispose ; cmd. Dispose ; con. Close ; con.
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