GetFieldType(Int32) Method

In This Topic

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

Syntax

Visual Basic
C#

'Declaration
 
Public Overloads Overrides Function GetFieldType( _
   ByVal i As Integer _
) As Type

public override Type GetFieldType( 
   int i
)

Parameters

i

Return Value

The System.Type that is the data type of the object.

Example

This sample shows how to retrieve names and types of all columns in a table.

csharp

public void GetFields(PgSqlConnection pgConnection)
{
  PgSqlCommand cmd = new PgSqlCommand("SELECT * FROM Test.Dept");
  cmd.Connection = pgConnection;
  pgConnection.Open();
  try
  {
    PgSqlDataReader reader = cmd.ExecuteReader();
    reader.Read();
    for (int i=0;i < reader.FieldCount;i++)
    {
      string fieldType = reader.GetDataTypeName(i);
      string fieldName = reader.GetName(i);
      string fieldType2 = reader.GetFieldType(i).FullName;
      Console.WriteLine(fieldName+"\t"+ fieldType+"\t"+ fieldType2);
    }        
    reader.Close();
  }
  finally
  {
    pgConnection.Close();
  }
}

Visual Basic

Public Sub GetFields(ByVal pgConnection As PgSqlConnection)
  Dim cmd As PgSqlCommand = New PgSqlCommand("SELECT * FROM Test.Dept")
  cmd.Connection = pgConnection
  pgConnection.Open()
  Try
    Dim reader As PgSqlDataReader = cmd.ExecuteReader()
    reader.Read()
    Dim i As Integer
    For i = 0 To reader.FieldCount - 1
      Dim fieldType As String = reader.GetDataTypeName(i)
      Dim fieldName As String = reader.GetName(i)
      Dim fieldType2 As String = reader.GetFieldType(i).FullName
      Console.WriteLine(fieldName & Chr(9) & fieldType & Chr(9) & fieldType2)
    Next i
    reader.Close()
  Finally
    pgConnection.Close()
  End Try
End Sub

Reference

PgSqlDataReader Class
PgSqlDataReader Members
Overload List
GetName Method

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