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Retrieving Data Using a DataReader
----------------------------------
c#
----
static void HasRows(SqlConnection connection)
{
using (connection)
{
SqlCommand command = new SqlCommand(
"SELECT CategoryID, CategoryName FROM Categories;",
connection);
connection.Open();
SqlDataReader reader = command.ExecuteReader();
if (reader.HasRows)
{
while (reader.Read())
{
Console.WriteLine("{0}\t{1}", reader.GetInt32(0),
reader.GetString(1));
}
}
else
{
Console.WriteLine("No rows found.");
}
reader.Close();
}
}
vb
---
Private Sub HasRows(ByVal connection As SqlConnection)
Using connection
Dim command As SqlCommand = New SqlCommand( _
"SELECT CategoryID, CategoryName FROM Categories;", _
connection)
connection.Open()
Dim reader As SqlDataReader = command.ExecuteReader()
If reader.HasRows Then
Do While reader.Read()
Console.WriteLine(reader.GetInt32(0) _
& vbTab & reader.GetString(1))
Loop
Else
Console.WriteLine("No rows found.")
End If
reader.Close()
End Using
End Sub
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7:34 AM
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