December 2004
Intermediate to advanced
1008 pages
21h 40m
English
Content preview from Microsoft® Visual C#® .NET 2003 Unleashed
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Implementing IDataParameter and IDataParameterCollection
The first items to deal with when creating the custom provider are parameters. Parameters are associated with commands and can be input parameters, output parameters, or both. Those parameters are associated with data commands via a customized collection of parameters.
The IDataParameter Interface
The IDataParameter interface is fairly simple. Table 28.1 lists the properties defined by the IDataParameter interface.
| Property | Description |
|---|---|
| DbType | Indicates the database type of the parameter. The value is an element of the DbType enumeration. |
| Direction | Indicates whether the parameter is input, output, or both. |
| IsNullable | Indicates whether the parameter can contain ... |
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