SqlCeResultSet.ReadRelative Method

Article
10/22/2007

Moves the reader the specified amount from the current position.

Namespace: System.Data.SqlServerCe
Assembly: System.Data.SqlServerCe (in system.data.sqlserverce.dll)

Syntax

'Declaration
Public Function ReadRelative ( _
    position As Integer _
) As Boolean
'Usage
Dim instance As SqlCeResultSet
Dim position As Integer
Dim returnValue As Boolean

returnValue = instance.ReadRelative(position)

public bool ReadRelative (
    int position
)

public:
bool ReadRelative (
    int position
)

public boolean ReadRelative (
    int position
)

public function ReadRelative (
    position : int
) : boolean

Parameters

position
The number of positions to move the reader.

Return Value

True if the operation succeeded; otherwise, false.

Remarks

If you pass a positive integer for the position, this function moves the reader forward in the result set. A negative integer moves the reader backward through the result set.

Example

The following example creates a ResultSet object and then calls several methods, including ReadRelative.

Dim conn As SqlCeConnection = Nothing

Try
    File.Delete("Test.sdf")

    Dim engine As New SqlCeEngine("Data Source = Test.sdf")
    engine.CreateDatabase()

    conn = New SqlCeConnection("Data Source = Test.sdf")
    conn.Open()

    Dim cmd As SqlCeCommand = conn.CreateCommand()
    cmd.CommandText = "CREATE TABLE myTable (col1 INT)"
    cmd.ExecuteNonQuery()

    cmd.CommandText = "SELECT * FROM myTable"

    Dim rs As SqlCeResultSet = cmd.ExecuteResultSet(ResultSetOptions.Updatable Or ResultSetOptions.Scrollable)

    Dim rec As SqlCeUpdatableRecord = rs.CreateRecord()

    ' Insert 10 records
    '
    Dim i As Integer
    For i = 0 To 9
        rec.SetInt32(0, i)
        rs.Insert(rec)
    Next i

    ' Scroll through the results
    '
    If True = rs.ReadFirst() Then
        MessageBox.Show("col1 = " & rs.GetInt32(0)) 'ordinal
    End If

    If True = rs.ReadRelative(5) Then
        MessageBox.Show("col1 = " & rs.GetInt32(0)) 'ordinal
    End If

    If True = rs.ReadLast() Then
        MessageBox.Show("col1 = " & rs.GetInt32(0)) 'ordinal
    End If

    If True = rs.ReadPrevious() Then
        MessageBox.Show("col1 = " & rs.GetInt32(0)) 'ordinal
    End If

    If True = rs.ReadAbsolute(5) Then
        MessageBox.Show("col1 = " & rs.GetInt32(0)) 'ordinal
    End If
Catch e As Exception
    MessageBox.Show(e.Message)
Finally
    conn.Close()
End Try

.NET Framework Security

Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see .

Platforms

Windows CE, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows XP Professional x64 Edition, Windows XP SP2

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

Version Information

.NET Compact Framework

Supported in: 2.0