HasRows Property (DB2DataReader)
On this page
Gets a value indicating whether the
DB2DataReader contains one or more rows.
Syntax
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'Declaration
Public Overrides ReadOnly Property HasRows As Boolean |
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public override bool HasRows {get;} |
Property Value
true if the
DB2DataReader contains one or more rows; otherwise,
false.
Example
This sample shows how to optimize reading from a data source using
HasRows property.
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public void FetchResults(DB2Connection db2Connection)
{
DB2Command cmd = new DB2Command("SELECT * FROM Dept");
cmd.FetchSize = 100;
cmd.Connection = db2Connection;
db2Connection.Open();
try
{
DB2DataReader reader = cmd.ExecuteReader();
if (reader.HasRows)
{
while (reader.Read())
{
for (int i=0;i<reader.FieldCount;i++)
{
Console.Write("\t"+reader[i]);
}
Console.WriteLine();
}
}
else
{
Console.WriteLine("No rows detected.");
}
}
finally
{
db2Connection.Close();
}
} |
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Public Sub FetchResults(ByVal db2Connection As DB2Connection)
Dim cmd As DB2Command = New DB2Command("SELECT * FROM Dept")
cmd.FetchSize = 100
cmd.Connection = db2Connection
db2Connection.Open()
Try
Dim reader As DB2DataReader = cmd.ExecuteReader()
If reader.HasRows Then
While reader.Read()
Dim i
For i = 0 To reader.FieldCount - 1
Console.Write(String.Concat(" ", reader(i)))
Next i
Console.WriteLine()
End While
Else
Console.WriteLine("No rows detected.")
End If
Finally
db2Connection.Close()
End Try
End Sub |
See Also
