DataTableReader.GetFieldType(Int32) Method

Reference

Definition

Namespace:: System.Data

Assemblies:: netstandard.dll, System.Data.Common.dll

Assembly:: System.Data.Common.dll

Assembly:: System.Data.dll

Assembly:: netstandard.dll

Source:: DataTableReader.cs

Source:: DataTableReader.cs

Source:: DataTableReader.cs

Important

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

public:
 override Type ^ GetFieldType(int ordinal);

public override Type GetFieldType(int ordinal);

override this.GetFieldType : int -> Type

Public Overrides Function GetFieldType (ordinal As Integer) As Type

Parameters

ordinal: Int32

The zero-based column ordinal.

Returns

Type

The Type that is the data type of the object.

Exceptions

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 .

Examples

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 void TestGetFieldType(DataTableReader reader)
{
    for (int i = 0; i < reader.FieldCount; i++)
    {
        Console.WriteLine(reader.GetName(i) + ":" +
            reader.GetFieldType(i).FullName);
    }
}

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

Applies to

Product	Versions
.NET	Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	2.0, 2.1

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