[SRCategory(ReportStringId.CatData)]
public object DataSource { get; set; }

<SRCategory(ReportStringId.CatData)>
Public Property DataSource As Object

var report = new MyReportClassName();
  var detailBand = report.Bands["DetailReport"] as DetailReportBand;
  detailBand.DataSource = DataSourceManager.GetDataSources<SqlDataSource>(report)
      .FirstOrDefault(ds=>ds.Name == "sqlDataSource1");
  detailBand.DataMember = "Employees";

Dim report = New MyReportClassName()
Dim detailBand = TryCast(report.Bands("DetailReport"), DetailReportBand)
detailBand.DataSource = DataSourceManager.GetDataSources(Of SqlDataSource)(report).
  FirstOrDefault(Function(ds) ds.Name = "sqlDataSource1")
detailBand.DataMember = "Employees"

using DevExpress.DataAccess.ConnectionParameters;
using DevExpress.DataAccess.Sql;
using DevExpress.XtraReports.UI;
// ...
private static XtraReport CreateReport()
{
    // Creates a new data source.
    SqlDataSource sqlDataSource = CreateSQLDataSource();

    // Creates a new report and assigns the data source.
    XtraReport report = new XtraReport();
    report.DataSource = sqlDataSource;
    report.DataMember = "selectQuery";

    // Creates a detail band and adds it to the report.
    DetailBand detailBand = new DetailBand();
    report.Bands.Add(detailBand);

    // Creates a table and adds it to the detail band.
    XRTable table = new XRTable();
    detailBand.Controls.Add(table);

    // Creates a row and adds the product name and product price cells to the row.
    table.BeginInit();

    XRTableRow row = new XRTableRow();
    table.Rows.Add(row);

    XRTableCell productName = new XRTableCell();
    XRTableCell productPrice = new XRTableCell();

    row.Cells.Add(productName);
    row.Cells.Add(productPrice);

    // Binds the table cells to the data fields.
    productName.ExpressionBindings.Add(new ExpressionBinding("BeforePrint", "Text", "[ProductName]"));
    productPrice.ExpressionBindings.Add(new ExpressionBinding("BeforePrint", "Text", "[UnitPrice]"));

    // Adjust the table width.
    table.BeforePrint += Table_BeforePrint;

    table.EndInit();
    return report;
}

private static void Table_BeforePrint(object sender, System.ComponentModel.CancelEventArgs e)
{
    XtraReport report = (sender as XRTable).RootReport;
    (sender as XRTable).WidthF = report.PageWidth - report.Margins.Left - report.Margins.Right;
}
private static SqlDataSource CreateSQLDataSource()
{
    // Creates a data source. 
    SQLiteConnectionParameters connectionParameters = new SQLiteConnectionParameters("Data/nwind.db", "");
    SqlDataSource dataSource = new SqlDataSource(connectionParameters);

    // Creates a SELECT query.
    SelectQuery query = SelectQueryFluentBuilder
        .AddTable("Products")
        .SelectColumn("ProductName")
        .SelectColumn("UnitPrice")
        .Build("selectQuery");

    // Adds the query to the collection and returns the data source. 
    dataSource.Queries.Add(query);
    dataSource.Fill();
    return dataSource;
}

Imports DevExpress.DataAccess.ConnectionParameters
Imports DevExpress.DataAccess.Sql
Imports DevExpress.XtraReports.UI
' ...
Private Shared Function CreateReport() As XtraReport
    ' Creates a new data source.
    Dim sqlDataSource As SqlDataSource = CreateSQLDataSource()

    ' Creates a new report and assigns the data source.
    Dim report As New XtraReport()
    report.DataSource = sqlDataSource
    report.DataMember = "selectQuery"

    ' Creates a detail band and adds it to the report.
    Dim detailBand As New DetailBand()
    report.Bands.Add(detailBand)

    ' Creates a table and adds it to the detail band.
    Dim table As New XRTable()
    detailBand.Controls.Add(table)

    ' Creates a row and adds the product name and product price cells to the row.
    table.BeginInit()

    Dim row As New XRTableRow()
    table.Rows.Add(row)

    Dim productName As New XRTableCell()
    Dim productPrice As New XRTableCell()

    row.Cells.Add(productName)
    row.Cells.Add(productPrice)

    ' Binds the table cells to the data fields.
    productName.ExpressionBindings.Add(New ExpressionBinding("BeforePrint", "Text", "[ProductName]"))
    productPrice.ExpressionBindings.Add(New ExpressionBinding("BeforePrint", "Text", "[UnitPrice]"))

    ' Adjust the table width.
    AddHandler table.BeforePrint, AddressOf Table_BeforePrint

    table.EndInit()
    Return report
End Function

Private Shared Sub Table_BeforePrint(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs)
    Dim report As XtraReport = (TryCast(sender, XRTable)).RootReport
    TryCast(sender, XRTable).WidthF = report.PageWidth - report.Margins.Left - report.Margins.Right
End Sub
Private Shared Function CreateSQLDataSource() As SqlDataSource
    ' Creates a data source. 
    Dim connectionParameters As New SQLiteConnectionParameters("Data/nwind.db", "")
    Dim dataSource As New SqlDataSource(connectionParameters)

    ' Creates a SELECT query.
    Dim query As SelectQuery = SelectQueryFluentBuilder.AddTable("Products").SelectColumn("ProductName").SelectColumn("UnitPrice").Build("selectQuery")

    ' Adds the query to the collection and returns the data source. 
    dataSource.Queries.Add(query)
    dataSource.Fill()
    Return dataSource
End Function

childReport.Parameters["Level"].Value = this.Parameters["Level"].Value;
childReport.DataSource = parentNode.Children;
subReport.ReportSource = childReport;

// Create a detail report.
SqlDataSource ds = report.DataSource as SqlDataSource;
CreateDetailReport(report, ds.Queries[0].Name + "." + ds.Relations[0].Name);

// Set up the report's data source.
report.DataSource = CreateDataSet();
report.DataMember = (report.DataSource as DataSet).Tables[0].TableName;

DynamicListLookUpSettings lookupSettings = new DynamicListLookUpSettings();
lookupSettings.DataSource = report.DataSource;
lookupSettings.DataMember = "Categories";

rep.Landscape = true;
rep.DataSource = FillDataset(pivot);
rep.DataMember = ((DataSet)rep.DataSource).Tables[0].TableName;

' Create a detail report.
Dim ds As SqlDataSource = TryCast(report.DataSource, SqlDataSource)
CreateDetailReport(report, ds.Queries(0).Name & "." & ds.Relations(0).Name)

' Set up the report's data source.
report.DataSource = CreateDataSet()
report.DataMember = (TryCast(report.DataSource, DataSet)).Tables(0).TableName

childReport.Parameters("Level").Value = Parameters("Level").Value
childReport.DataSource = parentNode.Children
subReport.ReportSource = childReport

Dim lookupSettings As New DynamicListLookUpSettings With {
    .DataSource = report.DataSource,
    .DataMember = "Categories",

rep.Landscape = True
rep.DataSource = PivotReportGenerator.FillDataset(pivot)
rep.DataMember = CType(rep.DataSource, System.Data.DataSet).Tables(CInt((0))).TableName