Error message when generating report

Question

I’m making a report and it’s giving an error message that I’m not finding a solution.

Error:

Code Generate button

   private void btnGerarRelatorio_Click(object sender, EventArgs e)
    {
        SqlCommand cmd = new SqlCommand();
        SqlDataAdapter da = new SqlDataAdapter();
        DataSet dsum = new DataSet();
        DataTable oTable = new DataTable();

        String strReportPath = "";
        try
        {
            strReportPath = @"Report4.rdlc";
            reportViewer1.LocalReport.ReportPath = strReportPath;
            SqlConnection conn = new SqlConnection(@"Data Source=DENILSON-PC;Initial Catalog=dbSistEstoqueEmp;Integrated Security=True");

            cmd.Connection = conn;
            cmd.CommandText = "SELECT * FROM tbEntradaEstoque WHERE cod_peca = @codPeca AND data_ent BETWEEN @dataEnt AND @dataEnt1";
            cmd.CommandType = CommandType.Text;
            conn.Open();
            cmd.Parameters.Add("codPeca", SqlDbType.Int).Value = Convert.ToInt32(txtCodPeca.Text);
            cmd.Parameters.Add("dataEnt", SqlDbType.DateTime).Value = Convert.ToDateTime(maskDataInicial.Text).Date;
            cmd.Parameters.Add("dataEnt1", SqlDbType.DateTime).Value = Convert.ToDateTime(maskDataFinal.Text).Date;

            SqlDataReader oDataReader = cmd.ExecuteReader();
            oTable.Load(oDataReader);
            ReportDataSource myReportDataSource = new ReportDataSource("dbEntSaidaPeca", oTable);
            reportViewer1.Clear();
            reportViewer1.LocalReport.DataSources[0] = myReportDataSource;
            reportViewer1.RefreshReport();


        }
        catch (Exception ex)
        {

            MessageBox.Show(ex.Message);
        }
    }

Answer 1

The name of Dataset passed as argument of ReportDataSource should be the same as the one configured in the RDLC file of the report. Then the creation of Reportdatasource should be:

 ReportDataSource myReportDataSource = new ReportDataSource("DataSet1", oTable);