다음을 통해 공유

SqlCeDataReader.Seek Method

  • 아티클

Note: This namespace, class, or member is supported only in version 1.1 of the .NET Framework.

Places the SqlCeDataReader on the record with indexed values that match the specified parameters.

Public Sub Seek( _
   ByVal dbSeekOptions As DbSeekOptions, _   ByVal ParamArray index() As Object _)
[C#]
public void Seek(DbSeekOptionsdbSeekOptions,   params object[] index);
[C++]
public: void Seek(DbSeekOptionsdbSeekOptions,Object* index __gc[]);
[JScript]
public function Seek(
   dbSeekOptions : DbSeekOptions,index : Object[]);

Parameters

  • dbSeekOptions

  • index

Return Value

Exceptions

Exception Type Condition
SqlCeException The value was not found, or other error.

Remarks

This method is intended to be a faster alternative to a SELECT statement for retrieving a row from a base table. Instead of a WHERE clause in a SELECT statement, Seek can be used to quickly retrieve a row based on its index value. For example, to retrieve an employee with an employee ID of 5, you could execute a SELECT statement, but using Seek with a value of 5 on the employee ID index will greatly improve performance.

Seek can only be used when CommandType is set to TableDirect, CommandText is set to a valid base table name, and IndexName is set to a valid index name on the specified base table.

After using Seek, SqlCeDataReader will return the remaining rows in their index order. When Seek is used on a SqlCeDataReader that has a range specified by SetRange, Seek will only position on rows within the range. For more information, see the "IRowsetIndex::Seek" topic in the OLE DB documentation.

Requirements

Platforms: .NET Compact Framework

.NET Framework Security:

See Also

SqlCeDataReader Class | SqlCeDataReader Members | System.Data.SqlServerCe Namespace