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OleDbParameter.OleDbParameter(String, OleDbType, Int32, ParameterDirection, Byte, Byte, String, DataRowVersion, Boolean, Object) Constructor

Initializes a new instance of the OleDbParameter class that uses the parameter name, data type, length, source column name, parameter direction, numeric precision, and other properties.

Namespace: System.Data.OleDb
Assembly: System.Data (in

public OleDbParameter (
	string parameterName,
	OleDbType dbType,
	int size,
	ParameterDirection direction,
	byte precision,
	byte scale,
	string sourceColumn,
	DataRowVersion sourceVersion,
	bool sourceColumnNullMapping,
	Object value
public OleDbParameter (
	String parameterName, 
	OleDbType dbType, 
	int size, 
	ParameterDirection direction, 
	byte precision, 
	byte scale, 
	String sourceColumn, 
	DataRowVersion sourceVersion, 
	boolean sourceColumnNullMapping, 
	Object value
public function OleDbParameter (
	parameterName : String, 
	dbType : OleDbType, 
	size : int, 
	direction : ParameterDirection, 
	precision : byte, 
	scale : byte, 
	sourceColumn : String, 
	sourceVersion : DataRowVersion, 
	sourceColumnNullMapping : boolean, 
	value : Object
Not applicable.



The name of the parameter.


One of the OleDbType values.


The length of the parameter.


One of the ParameterDirection values.


The total number of digits to the left and right of the decimal point to which Value is resolved.


The total number of decimal places to which Value is resolved.


The name of the source column.


One of the DataRowVersion values.


true if the source column is nullable; false if it is not.


An Object that is the value of the OleDbParameter.

Exception typeCondition


The value supplied in the dataType parameter is an invalid back-end data type.

The Size and Precision are inferred from the value of the dataType parameter if they are not explicitly set in the size and precision parameters.

The following example creates an OleDbParameter and displays the ParameterName.

public void CreateOleDbParameter()
    OleDbParameter parameter = new OleDbParameter(
        "Description", OleDbType.VarChar, 11, 
        ParameterDirection.Output, true, 0, 0, "Description",
        DataRowVersion.Current, "garden hose");

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0