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Devart.Data.SqlServer Namespace / SqlDataReader Class / GetFieldType Method / GetFieldType(Int32) Method
Example

In This Topic
    GetFieldType(Int32) Method
    In This Topic
    Gets the System.Type that is the data type of the object.
    Syntax
    '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.
    public void GetFields(SqlConnection myConnection)
    {
      SqlCommand cmd = new SqlCommand("SELECT * FROM Test.Dept");
      cmd.Connection = myConnection;
      myConnection.Open();
      try
      {
        SqlDataReader 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
      {
        myConnection.Close();
      }
    }
    Public Sub GetFields(ByVal myConnection As SqlConnection)
      Dim cmd As SqlCommand = New SqlCommand("SELECT * FROM Test.Dept")
      cmd.Connection = myConnection
      myConnection.Open()
      Try
        Dim reader As SqlDataReader = 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
        myConnection.Close()
      End Try
    End Sub
    Requirements

    Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

    See Also