SqlDataSourceView.ParameterPrefix Property

Note: This property is new in the .NET Framework version 2.0.

Gets the string that is used to prefix a parameter placeholder in a parameterized SQL query.

Namespace: System.Web.UI.WebControls
Assembly: System.Web (in system.web.dll)

protected:
virtual property String^ ParameterPrefix {
	String^ get ();
}
/** @property */
protected String get_ParameterPrefix ()

protected function get ParameterPrefix () : String

Property Value

The "@" string.

SQL queries and commands can be parameterized, in that they contain placeholders for values that are bound to the query at run time. Depending on the ADO.NET provider that is set for the SqlDataSource control, which is identified by the ProviderName property, the parameters are evaluated by alias or by their ordering in the ParameterCollection object.

If the ProviderName is not set or is set to the System.Data.SqlClient, parameters are evaluated by alias and the ParameterPrefix property is used to add a parameter prefix to the Name property of each Parameter object in a ParameterCollection during a data retrieval or data manipulation operation. If the ProviderName property is set to the System.Data.OleDb or System.Data.Odbc, the parameters are evaluated by order and the ParameterPrefix and Name properties are ignored.

If you extend the SqlDataSourceView class, you can override the ParameterPrefix property to supply a prefix other than the "@" string, if required.

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

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

.NET Framework

Supported in: 2.0

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