HasRows Property (UniDataReader)
On this page
Gets a value indicating whether the
UniDataReader contains one or more rows.
Syntax
|
|---|
'Declaration
Public Overrides ReadOnly Property HasRows As Boolean |
|
|---|
public override bool HasRows {get;} |
Property Value
true if the
UniDataReader contains one or more rows; otherwise,
false.
Example
This sample shows how to optimize reading from a data source using
HasRows property.
|
|---|
public void FetchResults(UniConnection uniConnection)
{
UniCommand cmd = new UniCommand("SELECT * FROM Test.Dept");
cmd.FetchSize = 100;
cmd.Connection = uniConnection;
uniConnection.Open();
try
{
UniDataReader 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
{
uniConnection.Close();
}
} |
|
|---|
Public Sub FetchResults(ByVal uniConnection As UniConnection)
Dim cmd As UniCommand = New UniCommand("SELECT * FROM Test.Dept")
cmd.FetchSize = 100
cmd.Connection = uniConnection
uniConnection.Open()
Try
Dim reader As UniDataReader = 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
uniConnection.Close()
End Try
End Sub |
See Also
