DataTableReader.GetFieldType Method (Int32)

 

Gets the Type that is the data type of the object.

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

Public Overrides Function GetFieldType (
	ordinal As Integer
) As Type

Parameters

ordinal
Type: System.Int32

The zero-based column ordinal.

Return Value

Type: System.Type

The Type that is the data type of the object.

Exception Condition
ArgumentOutOfRangeException

The index passed was outside the range of 0 to FieldCount - 1.

InvalidOperationException

An attempt was made to read or access a column in a closed DataTableReader .

Call the following procedure, passing in a DataTableReader instance in order to display a list of all the fields and the full name for each type in the Console window.

Private Sub TestGetFieldType(ByVal reader As DataTableReader)
   For i As Integer = 0 To reader.FieldCount - 1
      Console.WriteLine(reader.GetName(i) & ":" & _
         reader.GetFieldType(i).FullName)
   Next
   Console.WriteLine("Press Enter to finish.")
   Console.ReadLine()
End Sub

.NET Framework
Available since 2.0
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