Progress® Telerik® Reporting R1 2020

How to: Bind to a DataView

The following example illustrates how to use a DataView as the source for an ObjectDataSource component.

The sample code below shows how to pass a DataView object to the DataSource property of the ObjectDataSource component. DataView is usually used when we want to work only with a subset of data from the DataTable. Additionally a sample calculated field is added that can be used in the report definition in the same way as a regular field.

C#

VB

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void Form3_Load(object sender, EventArgs e)
{
    // Creating and configuring the ObjectDataSource component:
    var objectDataSource = new Telerik.Reporting.ObjectDataSource();
    objectDataSource.DataSource = GetData("Name LIKE 'Mountain%'"); // GetData returns a DataView with the specified row filter.
    objectDataSource.CalculatedFields.Add(new Telerik.Reporting.CalculatedField("FullName", typeof(string), "=Fields.Name + ' ' + Fields.ProductNumber")); // Adding a sample calculated field.

    // Creating a new report
    var report = new Report1();

    // Assigning the ObjectDataSource component to the DataSource property of the report.
    report.DataSource = objectDataSource;

    // Use the InstanceReportSource to pass the report to the viewer for displaying
    var reportSource = new Telerik.Reporting.InstanceReportSource();
    reportSource.ReportDocument = report;

    // Assigning the report to the report viewer.
    reportViewer1.ReportSource = reportSource;

    // Calling the RefreshReport method in case this is a WinForms application.
    reportViewer1.RefreshReport();
}

static DataView GetData(string rowFilter)
{
    const string connectionString =
        "Data Source=(local)\\SQLEXPRESS;Initial Catalog=AdventureWorks;Integrated Security=True";

    string selectCommandText =
        "SELECT Name, ProductNumber FROM Production.Product;";

    SqlDataAdapter dataAdapter = new SqlDataAdapter(selectCommandText, connectionString);
    DataTable dataTable = new DataTable();

    dataAdapter.Fill(dataTable);

    DataView dataView = dataTable.DefaultView;
    dataView.RowFilter = rowFilter; // View only those records that match a certain criteria.

    return dataView;
}

Private Sub Form3_Load(ByVal sender As System.Object, ByVal e As System.EventArgs)

    ' Creating and configuring the ObjectDataSource component:
    Dim objectDataSource As New Telerik.Reporting.ObjectDataSource()
    objectDataSource.DataSource = GetData("Name LIKE 'Mountain%'") ' GetData returns a DataView with the specified row filter.
    objectDataSource.CalculatedFields.Add(New Telerik.Reporting.CalculatedField("FullName", GetType(String), "=Fields.Name + ' ' + Fields.ProductNumber")) ' Adding a sample calculated field.


    'Creating a new report
    Dim report As New Report1()

    ' Assigning the ObjectDataSource component to the DataSource property of the report.
    report.DataSource = objectDataSource

    ' Use the InstanceReportSource to pass the report to the viewer for displaying.
    Dim reportSource As New InstanceReportSource
    reportSource.ReportDocument = report

    ' Assigning the report to the report viewer.
    reportViewer1.ReportSource = reportSource

    ' Calling the RefreshReport method in case this is a WinForms application.
    reportViewer1.RefreshReport()

End Sub

Shared Function GetData(ByVal rowFilter As String) As DataView
    Const connectionString As String =
        "Data Source=(local)\SQLEXPRESS;Initial Catalog=AdventureWorks;Integrated Security=True"

    Dim selectCommandText As String =
        "SELECT Name, ProductNumber FROM Production.Product;"

    Dim dataAdapter = New SqlDataAdapter(selectCommandText, connectionString)
    Dim dataTable As New DataTable()
    dataAdapter.Fill(dataTable)

    Dim dataView = dataTable.DefaultView
    dataView.RowFilter = rowFilter

    Return dataView
End Function