FieldCount Property (SqlShimDataReader)

In This Topic

Gets the number of columns in the current row.

Syntax

Visual Basic
C#

'Declaration
 
Public Overrides ReadOnly Property FieldCount As Integer

public override int FieldCount {get;}

Property Value

When not positioned in a valid record set, 0; otherwise the number of columns in the current record. The default value is -1.

Remarks

After executing a query that does not return rows, FieldCount returns 0.

Example

This sample demonstrates how to iterate through fields in a row using FieldCount property.

csharp

public void FetchResults(MailChimpConnection mailchimpConnection)
{
  MailChimpCommand cmd = new MailChimpCommand("SELECT * FROM Folders");
  cmd.FetchSize = 100;
  cmd.Connection = mailchimpConnection;
  mailchimpConnection.Open();
  try
  {
    MailChimpDataReader reader = cmd.ExecuteReader();
    while (reader.Read())
    {
      for (int i=0;i<reader.FieldCount;i++)
      {
        Console.Write("\t"+reader[i]);
      }
      Console.WriteLine();
    }
  }
  finally
  {
    mailchimpConnection.Close();
  }
}

Visual Basic

Public Sub FetchResults(ByVal mailchimpConnection As MailChimpConnection)
  Dim cmd As MailChimpCommand = New MailChimpCommand("SELECT * FROM Folders")
  cmd.FetchSize = 100
  cmd.Connection = mailchimpConnection
  mailchimpConnection.Open()
  Try
    Dim reader As MailChimpDataReader = cmd.ExecuteReader()
    While reader.Read()
      Dim i
      For i = 0 To reader.FieldCount - 1
        Console.Write(String.Concat(" ", reader(i)))
      Next i
      Console.WriteLine()
    End While
  Finally
    mailchimpConnection.Close()
  End Try
End Sub

Reference

SqlShimDataReader Class
SqlShimDataReader Members

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