Value Property

OdbcParameter.Value Property


Gets or sets the value of the parameter.

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

public override object Value { get; set; }

Property Value

Type: System.Object

An Object that is the value of the parameter. The default value is null.

For input parameters, the value is bound to the OdbcCommand that is sent to the server. For output and return-value parameters, the value is set on completion of the OdbcCommand and after the OdbcDataReader is closed.

When you send a null parameter value to the server, the user must specify DBNull, not null. A null value in the system is an empty object that has no value. DBNull is used to represent null values. If the parameter is used to call a stored procedure with parameters that have default values, setting Value to null causes the default value to be used.

If the application specifies the database type, the bound value is converted to that type when the provider sends the data to the server. The provider tries to convert any type of value if it supports the IConvertible interface. Conversion errors may result if the specified type is not compatible with the value.

Both the DbType and OdbcType properties can be inferred by setting Value. If applicable, the size, precision, and scale is also inferred from Value when the parameterized statement is executed. However, inferred values are not exposed to the user.

The Value property is overwritten by the Update method.

The following example creates an OdbcParameter and sets some of its properties.

public void CreateOdbcParameter() 
    OdbcParameter parameter = new OdbcParameter("Description", OdbcType.VarChar, 88);
    parameter.Value = "garden hose";

.NET Framework
Available since 1.1
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