/// <summary>
/// Converts a NpgsqlDataReader to a DataSet
/// <param name='reader'>
/// NpgsqlDataReader to convert.</param>
/// <returns>
/// DataSet filled with the contents of the reader.</returns>
/// </summary>
public static DataSet ConvertDataReaderToDataSet(NpgsqlDataReader reader, string tabela)
{
DataSet dataSet = new DataSet();
do
{
// Create new data table
DataTable schemaTable = reader.GetSchemaTable();
DataTable dataTable = new DataTable(tabela);
if (schemaTable != null)
{
// A query returning records was executed
for (int i = 0; i < schemaTable.Rows.Count; i++)
{
DataRow dataRow = schemaTable.Rows[i];
// Create a column name that is unique in the data table
string columnName = (string)dataRow["ColumnName"]; //+ "<C" + i + "/>";
// Add the column definition to the data table
DataColumn column = new DataColumn(columnName, (Type)dataRow["DataType"]);
dataTable.Columns.Add(column);
}
dataSet.Tables.Add(dataTable);
// Fill the data table we just created
while (reader.Read())
{
DataRow dataRow = dataTable.NewRow();
for (int i = 0; i < reader.FieldCount; i++)
dataRow[i] = reader.GetValue(i);
dataTable.Rows.Add(dataRow);
}
}
else
{
// No records were returned
DataColumn column = new DataColumn("RowsAffected");
dataTable.Columns.Add(column);
dataSet.Tables.Add(dataTable);
DataRow dataRow = dataTable.NewRow();
dataRow[0] = reader.RecordsAffected;
dataTable.Rows.Add(dataRow);
}
}
while (reader.NextResult());
return dataSet;
}
private void BuildSchema()
{
if (select_schema == null)
{
bool openedConnection = false;
try
{
if ((data_adapter.SelectCommand.Connection.State & ConnectionState.Open) != ConnectionState.Open)
{
data_adapter.SelectCommand.Connection.Open();
openedConnection = true;
}
using (NpgsqlDataReader reader = data_adapter.SelectCommand.ExecuteReader(CommandBehavior.SchemaOnly | CommandBehavior.KeyInfo))
{
select_schema = reader.GetSchemaTable();
}
}
finally
{
if (openedConnection)
{
data_adapter.SelectCommand.Connection.Close();
}
}
}
}
