使用DataSet从ODBC读取数据

Question

I have created ODBS user DNS for database, opened VS, created DataSet and imported one table members . I would like to read all records from dataset, how to do that? I have tried query below but it return no result. I can preview data using preview menu in designer but do not find a way to get data using code.

    var dataSet = new DataSet1();        
    var membersDataTable = dataSet.members;

    var take = membersDataTable.Take(100);

Answer 1

It looks like you have created the schema for a DataSet, but you have not run any queries to load the DataSet .

using (OdbcConnection connection = 
               new OdbcConnection(connectionString))
    {
        string queryString = "SELECT * FROM Members";
        OdbcDataAdapter adapter = 
            new OdbcDataAdapter(queryString, connection);

        // Open the connection and fill the DataSet.
        try
        {
            connection.Open();
            adapter.Fill(dataSet);
        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.Message);
        }
        // The connection is automatically closed when the
        // code exits the using block.