FieldCount Property (SqlDataReader)
Gets the number of columns in the current row.
public override int FieldCount {get;}
'Declaration
Public Overrides ReadOnly Property FieldCount As Integer
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.
This sample demonstrates how to iterate through fields in a row using
FieldCount property.
public void FetchResults(SqlConnection myConnection)
{
SqlCommand cmd = new SqlCommand("SELECT * FROM Test.Dept");
cmd.FetchSize = 100;
cmd.Connection = myConnection;
myConnection.Open();
try
{
SqlDataReader reader = cmd.ExecuteReader();
while (reader.Read())
{
for (int i=0;i<reader.FieldCount;i++)
{
Console.Write("\t"+reader[i]);
}
Console.WriteLine();
}
}
finally
{
myConnection.Close();
}
}
Public Sub FetchResults(ByVal myConnection As SqlConnection)
Dim cmd As SqlCommand = New SqlCommand("SELECT * FROM Test.Dept")
cmd.FetchSize = 100
cmd.Connection = myConnection
myConnection.Open()
Try
Dim reader As SqlDataReader = 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
myConnection.Close()
End Try
End Sub
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