Serialization in WPF Olap Client

6 May 20215 minutes to read

This feature allows users to store the current session as a stream anywhere and load the saved stream back to populate the OLAP client control.

The following code sample describes getting the report as stream.

C#

Stream stream = this.olapClient1.GetReportStream();

VBNET

Dim stream As Stream = Me.olapClient1.GetReportStream()

The following code sample illustrates loading the report which is in stream type to OLAP client.

C#

this.olapClient1.LoadReportStream(reportStream);

VBNET

Me.olapClient1.LoadReportStream(reportStream)

The following code sample describes

• storing of the report as stream in database and
• retrieving the report as stream from the database and loading it back to OLAP client.

Storing report as stream in database

C#

Stream stream = this.olapClient1.GetReportStream();
if (stream!= null)
{
    MemoryStream reportStream = stream as MemoryStream;
    ReportNameWindow saveReport = new ReportNameWindow(this.ReportNames);
    saveReport.WindowStartupLocation = WindowStartupLocation.CenterOwner;
    saveReport.Owner = App.Current.Windows[0];
    if (saveReport.ShowDialog() == true)
    {
        string repotName = saveReport.reportName;
        con.Open();
        SqlCeCommand sqlCmd = new SqlCeCommand("insert into ReportsTable Values(@ReportName,@Report)", con);
        sqlCmd.Parameters.Add("@ReportName", repotName);
        sqlCmd.Parameters.Add("@Report", reportStream.ToArray());
        sqlCmd.ExecuteNonQuery();
        con.Close();
        this.ReportNames.Add(saveReport.reportName);
    }
}

VBNET

Dim stream As Stream = Me.olapClient1.GetReportStream()
If stream IsNot Nothing Then
    reportStream = TryCast(stream, MemoryStream)
    Me.saveReport = New ReportNameWindow(Me.reportNames)
    If saveReport.ShowDialog() = True Then
        Dim repotName As String = "SalesReport"
        con.Open()
        Dim cmd1 As SqlCeCommand = New SqlCeCommand("insert into ReportsTable Values(@ReportName,@Report)", con)
        cmd1.Parameters.Add("@ReportName", repotName)
        cmd1.Parameters.Add("@Report", reportStream.ToArray())
        cmd1.ExecuteNonQuery()
        con.Close()
    End If
End If

Loading report as stream from database

C#

string reportname ="RevenueReport";
Stream reportStream = null;
con.Open();
SqlCeDataAdapter da = new SqlCeDataAdapter("Select * from ReportsTable", con);
DataSet dSet = new DataSet();
da.Fill(dSet);
DataTable table = dSet.Tables[0];
foreach (DataRow row in table.Rows)
{
    if ((row.ItemArray[0] as string).Equals(reportname))
    {
        reportStream = new MemoryStream(row.ItemArray[1] as byte[]);
        break;
    }
} 
this.olapClient1.LoadReportStream(reportStream);
con.Close();

VBNET

Dim reportname As String ="RevenueReport"                    
Dim reportStream As Stream = Nothing
con.Open()
Dim da As SqlCeDataAdapter = New SqlCeDataAdapter("Select * from ReportsTable", con)
Dim dSet As DataSet = New DataSet()
da.Fill(dSet)
Dim table As DataTable = dSet.Tables(0)
For Each row As DataRow In table.Rows
    If (TryCast(row.ItemArray(0), String)).Equals(reportname) Then
        reportStream = New MemoryStream(TryCast(row.ItemArray(1), Byte()))
Exit For
End If
Next row
Me.olapClient1.LoadReportStream(reportStream)
con.Close()

A sample demo is available at the following location.

{system drive}:\Users\<User Name>\AppData\Local\Syncfusion\EssentialStudio\<Version Number>\WPF\OlapClient.WPF\Samples\Serialization\Report Serialization