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using System;
using System.Data;
using System.Data.SqlClient;
class Merge
{
public static void Main()
{
SqlConnection mySqlConnection =new SqlConnection("server=(local)\\SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI;");
SqlCommand mySqlCommand = mySqlConnection.CreateCommand();
mySqlCommand.CommandText =
"SELECT ID, FirstName, LastName, Address " +
"FROM Customers " +
"WHERE ID IN ('001', '002', '003')";
SqlDataAdapter mySqlDataAdapter = new SqlDataAdapter();
mySqlDataAdapter.SelectCommand = mySqlCommand;
DataSet myDataSet = new DataSet();
mySqlConnection.Open();
mySqlDataAdapter.Fill(myDataSet, "Customers");
mySqlCommand.CommandText =
"SELECT ID, FirstName, LastName, Address " +
"FROM Customers " +
"WHERE CustomerID IN ('008', '009')";
DataSet myDataSet2 = new DataSet();
mySqlDataAdapter.Fill(myDataSet2, "Customers2");
mySqlCommand.CommandText =
"SELECT TOP 5 ProductID, ProductName, UnitPrice " +
"FROM Products " +
"ORDER BY ProductID";
DataSet myDataSet3 = new DataSet();
mySqlDataAdapter.Fill(myDataSet3, "Products");
mySqlConnection.Close();
myDataSet.Merge(myDataSet2);
myDataSet.Merge(myDataSet3, true, MissingSchemaAction.Add);
foreach (DataTable myDataTable in myDataSet.Tables) {
Console.WriteLine("\nReading from the " + myDataTable + "DataTable");
foreach (DataRow myDataRow in myDataTable.Rows) {
foreach (DataColumn myDataColumn in myDataTable.Columns) {
Console.WriteLine(myDataColumn + "= " + myDataRow[myDataColumn]);
}
}
}
}
}
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