How to load the report from the database

[NonAction]
public void OnInitReportOptions(ReportViewerOptions reportOption)
{
    byte[] bytes = ""; // provide your byte array report data
    MemoryStream reportStream = new MemoryStream(bytes);
    reportOption.ReportModel.Stream = reportStream;
}

[NonAction]
public void OnInitReportOptions(ReportViewerOptions reportOption)
{
    string base64String = ""; // provide your base64 report data

    byte[] bytes = System.Convert.FromBase64String(base64String);
    MemoryStream reportStream = new MemoryStream(bytes);
    reportOption.ReportModel.Stream = reportStream;
}

[NonAction]
public void OnInitReportOptions(ReportViewerOptions reportOption)
{
    string reportData = ""; // provide your database report data
    byte[] bytes = System.Text.Encoding.ASCII.GetBytes(reportFile);
    MemoryStream reportStream = new MemoryStream(bytes);
    reportOption.ReportModel.Stream = reportStream;
}