Read Method (SqlShimDataReader)
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'Declaration
Public Overrides Function Read() As Boolean |
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public override bool Read() |
Return Value
true if there are more rows; otherwise, false.
The following example creates a
Devart.Data.BigQuery.BigQueryConnection, a
Devart.Data.BigQuery.BigQueryCommand, and a
SqlShimDataReader. The example reads through the data, writing it out to the console. Finally, the example closes the
SqlShimDataReader, then the
Devart.Data.BigQuery.BigQueryConnection.
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public void ReadMyData(string myConnString)
{
string mySelectQuery = "SELECT id, first_name FROM your_project.your_dataset.employees";
BigQueryConnection bigQueryConnection = new BigQueryConnection(myConnString);
BigQueryCommand bigQueryCommand = new BigQueryCommand(mySelectQuery,bigQueryConnection);
bigQueryConnection.Open();
BigQueryDataReader bigQueryReader;
bigQueryReader = bigQueryCommand.ExecuteReader();
// Always call Read before accessing data.
while (bigQueryReader.Read()) {
Console.WriteLine(bigQueryReader.GetString(0) + ", " + bigQueryReader.GetString(1));
}
// always call Close when done reading.
bigQueryReader.Close();
// Close the connection when done with it.
bigQueryConnection.Close();
} |
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Public Sub ReadMyData(myConnString As String)
Dim mySelectQuery As String = "SELECT id, first_name FROM your_project.your_dataset.employees"
Dim bigQueryConnection As New BigQueryConnection(myConnString)
Dim bigQueryCommand As New BigQueryCommand(mySelectQuery, bigQueryConnection)
bigQueryConnection.Open()
Dim bigQueryReader As BigQueryDataReader
bigQueryReader = bigQueryCommand.ExecuteReader()
' Always call Read before accessing data.
While bigQueryReader.Read()
Console.WriteLine(bigQueryReader.GetString(0) + ", " _
+ bigQueryReader.GetString(1))
End While
' always call Close when done reading.
bigQueryReader.Close()
' Close the connection when done with it.
bigQueryConnection.Close()
End Sub |
