Hi,
Please change your "Form1_Load" code as follow:
private void Form1_Load(object sender, EventArgs e)
{
this.reportViewer1.LocalReport.ReportPath = "Report1.rdlc";
DataSet1 dataSet = new DataSet1();
String SelectCmdString = "select * from Tabla1";
OleDbConnection objOleDbConnection = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|\\example.mdb");
OleDbDataAdapter mySqlDataAdapter = new OleDbDataAdapter(SelectCmdString, objOleDbConnection);
mySqlDataAdapter.Fill(dataSet,"Tabla1");
ReportDataSource dataSource = new ReportDataSource("DataSet1_Tabla1", dataSet.Tabla1);
reportViewer1.LocalReport.DataSources.Add(dataSource);
}