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OracleParameter Class

Represents a parameter to an OracleCommand and optionally its mapping to a DataColumn. This class cannot be inherited.

System::Object
  System::MarshalByRefObject
    System.Data.Common::DbParameter
      System.Data.OracleClient::OracleParameter

Namespace:  System.Data.OracleClient
Assembly:  System.Data.OracleClient (in System.Data.OracleClient.dll)

public ref class OracleParameter sealed : public DbParameter, 
	ICloneable, IDbDataParameter, IDataParameter

The OracleParameter type exposes the following members.

  NameDescription
Public methodOracleParameter()Initializes a new instance of the OracleParameter class.
Public methodOracleParameter(String, OracleType)Initializes a new instance of the OracleParameter class that uses the parameter name and data type.
Public methodOracleParameter(String, Object)Initializes a new instance of the OracleParameter class that uses the parameter name and an OracleParameter object.
Public methodOracleParameter(String, OracleType, Int32)Initializes a new instance of the OracleParameter class that uses the parameter name, data type, and length.
Public methodOracleParameter(String, OracleType, Int32, String)Initializes a new instance of the OracleParameter class that uses the parameter name, data type, length, and source column name.
Public methodOracleParameter(String, OracleType, Int32, ParameterDirection, String, DataRowVersion, Boolean, Object)Initializes a new instance of the OracleParameter class that uses the parameter name, data type, size, direction, source column, source version, and other properties.
Public methodOracleParameter(String, OracleType, Int32, ParameterDirection, Boolean, Byte, Byte, String, DataRowVersion, Object)Initializes a new instance of the OracleParameter class that uses the parameter name, data type, length, source column name, parameter direction, numeric precision, and other properties.
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  NameDescription
Public propertyDbTypeGets or sets the DbType of the parameter. (Overrides DbParameter::DbType.)
Public propertyDirectionGets or sets a value that indicates whether the parameter is input-only, output-only, bidirectional, or a stored procedure return value parameter. (Overrides DbParameter::Direction.)
Public propertyIsNullableGets or sets a value that indicates whether the parameter accepts null values. (Overrides DbParameter::IsNullable.)
Public propertyOffsetGets or sets the offset to the Value property.
Public propertyOracleTypeGets or sets the OracleType of the parameter.
Public propertyParameterNameGets or sets the name of the OracleParameter. (Overrides DbParameter::ParameterName.)
Public propertyPrecision Obsolete. Gets or sets the maximum number of digits used to represent the Value property.
Public propertyScale Obsolete. Gets or sets the number of decimal places to which Value is resolved.
Public propertySizeGets or sets the maximum size, in bytes, of the data within the column. (Overrides DbParameter::Size.)
Public propertySourceColumnGets or sets the name of the source column mapped to the DataSet and used for loading or returning the Value (Overrides DbParameter::SourceColumn.)
Public propertySourceColumnNullMappingSets or gets a value which indicates whether the source column is nullable. This allows OracleCommandBuilder to correctly generate Update statements for nullable columns. (Overrides DbParameter::SourceColumnNullMapping.)
Public propertySourceVersionGets or sets the DataRowVersion to use when you load Value. (Overrides DbParameter::SourceVersion.)
Public propertyValueGets or sets the value of the parameter. (Overrides DbParameter::Value.)
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  NameDescription
Public methodCreateObjRefCreates an object that contains all the relevant information required to generate a proxy used to communicate with a remote object. (Inherited from MarshalByRefObject.)
Public methodEquals(Object)Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public methodGetHashCodeServes as a hash function for a particular type. (Inherited from Object.)
Public methodGetLifetimeServiceRetrieves the current lifetime service object that controls the lifetime policy for this instance. (Inherited from MarshalByRefObject.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodInitializeLifetimeServiceObtains a lifetime service object to control the lifetime policy for this instance. (Inherited from MarshalByRefObject.)
Protected methodMemberwiseClone()Creates a shallow copy of the current Object. (Inherited from Object.)
Protected methodMemberwiseClone(Boolean)Creates a shallow copy of the current MarshalByRefObject object. (Inherited from MarshalByRefObject.)
Public methodResetDbTypeResets the type associated with this OracleParameter. (Overrides DbParameter::ResetDbType().)
Public methodResetOracleTypeResets the type associated with this OracleParameter.
Public methodToStringGets a string that contains the ParameterName. (Overrides Object::ToString().)
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  NameDescription
Explicit interface implemetationPrivate methodICloneable::CloneFor a description of this member, see ICloneable::Clone.
Explicit interface implemetationPrivate propertyIDbDataParameter::PrecisionIndicates the precision of numeric parameters. (Inherited from DbParameter.)
Explicit interface implemetationPrivate propertyIDbDataParameter::ScaleFor a description of this member, see IDbDataParameter::Scale. (Inherited from DbParameter.)
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Parameter names are not case-sensitive.

When querying an Oracle database using the Microsoft OLE DB Provider for Oracle (MSDAORA) and the ODBC.NET Framework Data Provider, using the LIKE clause to query values in fixed-length fields may not return all expected matches. The reason is that when Oracle matches values for fixed-length fields in a LIKE clause, it matches the entire length of the string, including any padding trailing spaces. For example, if a table in an Oracle database contains a field named "Field1" that is defined as char(3), and you enter the value "a" into a row of that table, the following code will not return the row.

No code example is currently available or this language may not be supported.

This is because Oracle stores the column value as "a " (padding "a", with trailing spaces, to the fixed field length of 3), which Oracle does not treat as a match for the parameter value of "a" in the case of a LIKE comparison of fixed-length fields.

To resolve this problem, append a percentage ("%") wildcard character to the parameter value ("a%"), or use an SQL = comparison instead.

The following example creates multiple instances of OracleParameter through the OracleParameterCollection within the OracleDataAdapter. These parameters are used to select data from the database and place the data in the DataSet. This example assumes that a DataSet and an OracleDataAdapter have already been created by using the appropriate schema, commands, and connection.

No code example is currently available or this language may not be supported.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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