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DataTableReader.GetInt64 Method

.NET Framework 4.5

Gets the value of the specified column as a 64-bit signed integer.

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

'Declaration
Public Overrides Function GetInt64 ( _
	ordinal As Integer _
) As Long

Parameters

ordinal: Type: System.Int32
The zero-based column ordinal

Return Value

Type: System.Int64
The value of the specified column.

Implements

IDataRecord.GetInt64(Int32)

Exceptions

Exception	Condition
ArgumentOutOfRangeException	The index passed was outside the range of 0 to FieldCount - 1.
DeletedRowInaccessibleException	An attempt was made to retrieve data from a deleted row.
InvalidOperationException	An attempt was made to read or access a column in a closed DataTableReader .
InvalidCastException	The specified column does not contain a 64-bit signed integer value.

Remarks

No conversions are performed; therefore, the data retrieved must already be an Int64 or coercible to an Int64.

Call IsDBNull to see if there are null values before calling this method.

Examples

The following example displays the contents of the column numbered 2 within the passed-in DataTableReader. If the value the column within a particular row is null, the code displays the text <NULL>. If the data within the column is not of the correct type, the example displays an error message for each row.

Private Sub PrintColumn(ByVal reader As DataTableReader)
   ' Loop through all the rows in the DataTableReader 
   While reader.Read()
      If reader.IsDBNull(2) Then
         Console.Write("<NULL>")
      Else 
         Try
            Console.Write(reader.GetInt64(2))
         Catch ex As InvalidCastException
            Console.Write("Invalid data type.")
         End Try 
      End If
      Console.WriteLine()
   End While 
End Sub

Version Information

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Platforms

Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

Reference

DataTableReader Class

System.Data Namespace

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