Generate Reports in C# Like Crystal Reports (.NET 10)

Imports IronPdf

IronPdf.License.LicenseKey = "KEY"

Imports IronPdf

IronPdf.License.LicenseKey = "KEY"

Imports System
Imports System.Collections.Generic
Imports System.Linq

' Invoice data model with customer, company, and line item details
Public Class InvoiceModel
    Public Property InvoiceNumber As String = String.Empty
    Public Property InvoiceDate As DateTime
    Public Property DueDate As DateTime

    Public Property Company As New CompanyInfo()
    Public Property Customer As New CustomerInfo()
    Public Property Items As New List(Of LineItem)()

    ' Computed totals - business logic stays in the model
    Public ReadOnly Property Subtotal As Decimal
        Get
            Return Items.Sum(Function(x) x.Total)
        End Get
    End Property

    Public Property TaxRate As Decimal = 0.08D

    Public ReadOnly Property TaxAmount As Decimal
        Get
            Return Subtotal * TaxRate
        End Get
    End Property

    Public ReadOnly Property GrandTotal As Decimal
        Get
            Return Subtotal + TaxAmount
        End Get
    End Property
End Class

' Company details for invoice header
Public Class CompanyInfo
    Public Property Name As String = String.Empty
    Public Property Address As String = String.Empty
    Public Property City As String = String.Empty
    Public Property Phone As String = String.Empty
    Public Property Email As String = String.Empty
    Public Property LogoPath As String = String.Empty
End Class

' Customer billing information
Public Class CustomerInfo
    Public Property Name As String = String.Empty
    Public Property Address As String = String.Empty
    Public Property City As String = String.Empty
    Public Property Email As String = String.Empty
End Class

' Individual invoice line item
Public Class LineItem
    Public Property Description As String = String.Empty
    Public Property Quantity As Integer
    Public Property UnitPrice As Decimal

    Public ReadOnly Property Total As Decimal
        Get
            Return Quantity * UnitPrice
        End Get
    End Property
End Class

Imports System
Imports System.Collections.Generic
Imports System.Linq

' Invoice data model with customer, company, and line item details
Public Class InvoiceModel
    Public Property InvoiceNumber As String = String.Empty
    Public Property InvoiceDate As DateTime
    Public Property DueDate As DateTime

    Public Property Company As New CompanyInfo()
    Public Property Customer As New CustomerInfo()
    Public Property Items As New List(Of LineItem)()

    ' Computed totals - business logic stays in the model
    Public ReadOnly Property Subtotal As Decimal
        Get
            Return Items.Sum(Function(x) x.Total)
        End Get
    End Property

    Public Property TaxRate As Decimal = 0.08D

    Public ReadOnly Property TaxAmount As Decimal
        Get
            Return Subtotal * TaxRate
        End Get
    End Property

    Public ReadOnly Property GrandTotal As Decimal
        Get
            Return Subtotal + TaxAmount
        End Get
    End Property
End Class

' Company details for invoice header
Public Class CompanyInfo
    Public Property Name As String = String.Empty
    Public Property Address As String = String.Empty
    Public Property City As String = String.Empty
    Public Property Phone As String = String.Empty
    Public Property Email As String = String.Empty
    Public Property LogoPath As String = String.Empty
End Class

' Customer billing information
Public Class CustomerInfo
    Public Property Name As String = String.Empty
    Public Property Address As String = String.Empty
    Public Property City As String = String.Empty
    Public Property Email As String = String.Empty
End Class

' Individual invoice line item
Public Class LineItem
    Public Property Description As String = String.Empty
    Public Property Quantity As Integer
    Public Property UnitPrice As Decimal

    Public ReadOnly Property Total As Decimal
        Get
            Return Quantity * UnitPrice
        End Get
    End Property
End Class

Imports IronPdf
Imports Microsoft.AspNetCore.Mvc.Razor
Imports Microsoft.AspNetCore.Mvc.ViewFeatures
Imports Microsoft.Extensions.DependencyInjection
Imports Microsoft.AspNetCore.Http
Imports Microsoft.AspNetCore.Mvc
Imports Microsoft.AspNetCore.Routing
Imports System.IO
Imports System.Threading.Tasks

' Service class for generating invoice PDFs from Razor views
Public Class InvoiceReportService
    Private ReadOnly _razorViewEngine As IRazorViewEngine
    Private ReadOnly _tempDataProvider As ITempDataProvider
    Private ReadOnly _serviceProvider As IServiceProvider

    Public Sub New(razorViewEngine As IRazorViewEngine, tempDataProvider As ITempDataProvider, serviceProvider As IServiceProvider)
        _razorViewEngine = razorViewEngine
        _tempDataProvider = tempDataProvider
        _serviceProvider = serviceProvider
    End Sub

    ' Generate PDF from invoice model
    Public Async Function GenerateInvoicePdfAsync(invoice As InvoiceModel) As Task(Of Byte())
        ' Render Razor view to HTML string
        Dim html As String = Await RenderViewToStringAsync("InvoiceTemplate", invoice)

        ' Configure PDF renderer with margins and paper size
        Dim renderer As New ChromePdfRenderer()
        renderer.RenderingOptions.MarginTop = 10
        renderer.RenderingOptions.MarginBottom = 10
        renderer.RenderingOptions.MarginLeft = 10
        renderer.RenderingOptions.MarginRight = 10
        renderer.RenderingOptions.PaperSize = IronPdf.Rendering.PdfPaperSize.Letter

        ' Convert HTML to PDF and return bytes
        Dim pdfDocument = renderer.RenderHtmlAsPdf(html)
        Return pdfDocument.BinaryData
    End Function

    ' Helper method to render a Razor view to string
    Private Async Function RenderViewToStringAsync(Of TModel)(viewName As String, model As TModel) As Task(Of String)
        Dim httpContext As New DefaultHttpContext With {.RequestServices = _serviceProvider}
        Dim actionContext As New ActionContext(httpContext, New RouteData(), New ActionDescriptor())

        Using stringWriter As New StringWriter()
            Dim viewResult = _razorViewEngine.FindView(actionContext, viewName, False)

            If Not viewResult.Success Then
                Throw New InvalidOperationException($"View '{viewName}' not found.")
            End If

            Dim viewDictionary As New ViewDataDictionary(Of TModel)(
                New EmptyModelMetadataProvider(), New ModelStateDictionary()) With {.Model = model}

            Dim viewContext As New ViewContext(actionContext, viewResult.View, viewDictionary,
                New TempDataDictionary(actionContext.HttpContext, _tempDataProvider),
                stringWriter, New HtmlHelperOptions())

            Await viewResult.View.RenderAsync(viewContext)
            Return stringWriter.ToString()
        End Using
    End Function
End Class

Imports IronPdf
Imports Microsoft.AspNetCore.Mvc.Razor
Imports Microsoft.AspNetCore.Mvc.ViewFeatures
Imports Microsoft.Extensions.DependencyInjection
Imports Microsoft.AspNetCore.Http
Imports Microsoft.AspNetCore.Mvc
Imports Microsoft.AspNetCore.Routing
Imports System.IO
Imports System.Threading.Tasks

' Service class for generating invoice PDFs from Razor views
Public Class InvoiceReportService
    Private ReadOnly _razorViewEngine As IRazorViewEngine
    Private ReadOnly _tempDataProvider As ITempDataProvider
    Private ReadOnly _serviceProvider As IServiceProvider

    Public Sub New(razorViewEngine As IRazorViewEngine, tempDataProvider As ITempDataProvider, serviceProvider As IServiceProvider)
        _razorViewEngine = razorViewEngine
        _tempDataProvider = tempDataProvider
        _serviceProvider = serviceProvider
    End Sub

    ' Generate PDF from invoice model
    Public Async Function GenerateInvoicePdfAsync(invoice As InvoiceModel) As Task(Of Byte())
        ' Render Razor view to HTML string
        Dim html As String = Await RenderViewToStringAsync("InvoiceTemplate", invoice)

        ' Configure PDF renderer with margins and paper size
        Dim renderer As New ChromePdfRenderer()
        renderer.RenderingOptions.MarginTop = 10
        renderer.RenderingOptions.MarginBottom = 10
        renderer.RenderingOptions.MarginLeft = 10
        renderer.RenderingOptions.MarginRight = 10
        renderer.RenderingOptions.PaperSize = IronPdf.Rendering.PdfPaperSize.Letter

        ' Convert HTML to PDF and return bytes
        Dim pdfDocument = renderer.RenderHtmlAsPdf(html)
        Return pdfDocument.BinaryData
    End Function

    ' Helper method to render a Razor view to string
    Private Async Function RenderViewToStringAsync(Of TModel)(viewName As String, model As TModel) As Task(Of String)
        Dim httpContext As New DefaultHttpContext With {.RequestServices = _serviceProvider}
        Dim actionContext As New ActionContext(httpContext, New RouteData(), New ActionDescriptor())

        Using stringWriter As New StringWriter()
            Dim viewResult = _razorViewEngine.FindView(actionContext, viewName, False)

            If Not viewResult.Success Then
                Throw New InvalidOperationException($"View '{viewName}' not found.")
            End If

            Dim viewDictionary As New ViewDataDictionary(Of TModel)(
                New EmptyModelMetadataProvider(), New ModelStateDictionary()) With {.Model = model}

            Dim viewContext As New ViewContext(actionContext, viewResult.View, viewDictionary,
                New TempDataDictionary(actionContext.HttpContext, _tempDataProvider),
                stringWriter, New HtmlHelperOptions())

            Await viewResult.View.RenderAsync(viewContext)
            Return stringWriter.ToString()
        End Using
    End Function
End Class

Imports IronPdf
Imports IronSoftware.Drawing

' Configure text-based headers and footers
Dim renderer As New ChromePdfRenderer()

' Set starting page number
renderer.RenderingOptions.FirstPageNumber = 1

' Add centered header with divider line
renderer.RenderingOptions.TextHeader = New TextHeaderFooter With {
    .CenterText = "CONFIDENTIAL - Internal Use Only",
    .DrawDividerLine = True,
    .Font = FontTypes.Arial,
    .FontSize = 10
}

' Add footer with date on left, page numbers on right
renderer.RenderingOptions.TextFooter = New TextHeaderFooter With {
    .LeftText = "{date} {time}",
    .RightText = "Page {page} of {total-pages}",
    .DrawDividerLine = True,
    .Font = FontTypes.Arial,
    .FontSize = 9
}

' Set margins to accommodate header/footer
renderer.RenderingOptions.MarginTop = 25
renderer.RenderingOptions.MarginBottom = 20

Imports IronPdf
Imports IronSoftware.Drawing

' Configure text-based headers and footers
Dim renderer As New ChromePdfRenderer()

' Set starting page number
renderer.RenderingOptions.FirstPageNumber = 1

' Add centered header with divider line
renderer.RenderingOptions.TextHeader = New TextHeaderFooter With {
    .CenterText = "CONFIDENTIAL - Internal Use Only",
    .DrawDividerLine = True,
    .Font = FontTypes.Arial,
    .FontSize = 10
}

' Add footer with date on left, page numbers on right
renderer.RenderingOptions.TextFooter = New TextHeaderFooter With {
    .LeftText = "{date} {time}",
    .RightText = "Page {page} of {total-pages}",
    .DrawDividerLine = True,
    .Font = FontTypes.Arial,
    .FontSize = 9
}

' Set margins to accommodate header/footer
renderer.RenderingOptions.MarginTop = 25
renderer.RenderingOptions.MarginBottom = 20

Imports IronPdf
Imports System

Dim renderer As New ChromePdfRenderer()

' Configure HTML header with logo and custom layout
renderer.RenderingOptions.HtmlHeader = New HtmlHeaderFooter With {
    .MaxHeight = 30,
    .HtmlFragment = "
<div style='display: flex; justify-content: space-between; align-items: center;
            width: 100%; font-family: Arial; font-size: 10px; color: #666;'>
    <img src='logo.png' style='height: 25px;'>
    <span>Company Name Inc.</span>
    <span>Invoice Report</span>
</div>",
    .BaseUrl = New Uri("C:\assets\images\").AbsoluteUri
}

' Configure HTML footer with page info and generation date
renderer.RenderingOptions.HtmlFooter = New HtmlHeaderFooter With {
    .MaxHeight = 20,
    .HtmlFragment = "
<div style='text-align: center; font-size: 9px; color: #999;
            border-top: 1px solid #ddd; padding-top: 5px;'>
    Page {page} of {total-pages} | Generated on {date}
</div>",
    .DrawDividerLine = False
}

Imports IronPdf
Imports System

Dim renderer As New ChromePdfRenderer()

' Configure HTML header with logo and custom layout
renderer.RenderingOptions.HtmlHeader = New HtmlHeaderFooter With {
    .MaxHeight = 30,
    .HtmlFragment = "
<div style='display: flex; justify-content: space-between; align-items: center;
            width: 100%; font-family: Arial; font-size: 10px; color: #666;'>
    <img src='logo.png' style='height: 25px;'>
    <span>Company Name Inc.</span>
    <span>Invoice Report</span>
</div>",
    .BaseUrl = New Uri("C:\assets\images\").AbsoluteUri
}

' Configure HTML footer with page info and generation date
renderer.RenderingOptions.HtmlFooter = New HtmlHeaderFooter With {
    .MaxHeight = 20,
    .HtmlFragment = "
<div style='text-align: center; font-size: 9px; color: #999;
            border-top: 1px solid #ddd; padding-top: 5px;'>
    Page {page} of {total-pages} | Generated on {date}
</div>",
    .DrawDividerLine = False
}

' Employee directory data models
Public Class EmployeeDirectoryModel
    Public Property Departments As List(Of Department) = New List(Of Department)()
    Public Property GeneratedDate As DateTime = DateTime.Now
End Class

' Department grouping with manager info
Public Class Department
    Public Property Name As String = String.Empty
    Public Property ManagerName As String = String.Empty
    Public Property Employees As List(Of Employee) = New List(Of Employee)()
End Class

' Individual employee details
Public Class Employee
    Public Property Name As String = String.Empty
    Public Property Title As String = String.Empty
    Public Property Email As String = String.Empty
    Public Property Phone As String = String.Empty
    Public Property PhotoUrl As String = String.Empty
    Public Property HireDate As DateTime
End Class

' Employee directory data models
Public Class EmployeeDirectoryModel
    Public Property Departments As List(Of Department) = New List(Of Department)()
    Public Property GeneratedDate As DateTime = DateTime.Now
End Class

' Department grouping with manager info
Public Class Department
    Public Property Name As String = String.Empty
    Public Property ManagerName As String = String.Empty
    Public Property Employees As List(Of Employee) = New List(Of Employee)()
End Class

' Individual employee details
Public Class Employee
    Public Property Name As String = String.Empty
    Public Property Title As String = String.Empty
    Public Property Email As String = String.Empty
    Public Property Phone As String = String.Empty
    Public Property PhotoUrl As String = String.Empty
    Public Property HireDate As DateTime
End Class

Imports IronPdf

Dim html As String = "<h1>Report</h1>"

' Configure renderer to wait for JavaScript execution
Dim renderer As New ChromePdfRenderer()
renderer.RenderingOptions.WaitFor.JavaScript(500) ' Wait 500ms for JS to complete
Dim pdf = renderer.RenderHtmlAsPdf(html)

Imports IronPdf

Dim html As String = "<h1>Report</h1>"

' Configure renderer to wait for JavaScript execution
Dim renderer As New ChromePdfRenderer()
renderer.RenderingOptions.WaitFor.JavaScript(500) ' Wait 500ms for JS to complete
Dim pdf = renderer.RenderHtmlAsPdf(html)

Imports IronPdf

' Combine multiple reports into a single PDF document
Public Function GenerateCombinedReport(sales As SalesReportModel, inventory As InventoryReportModel) As Byte()
    Dim renderer As New ChromePdfRenderer()

    ' Render each report section separately
    Dim salesPdf = renderer.RenderHtmlAsPdf(RenderSalesReport(sales))
    Dim inventoryPdf = renderer.RenderHtmlAsPdf(RenderInventoryReport(inventory))

    ' Merge PDFs into one document
    Dim combined = PdfDocument.Merge(salesPdf, inventoryPdf)
    Return combined.BinaryData
End Function

Imports IronPdf

' Combine multiple reports into a single PDF document
Public Function GenerateCombinedReport(sales As SalesReportModel, inventory As InventoryReportModel) As Byte()
    Dim renderer As New ChromePdfRenderer()

    ' Render each report section separately
    Dim salesPdf = renderer.RenderHtmlAsPdf(RenderSalesReport(sales))
    Dim inventoryPdf = renderer.RenderHtmlAsPdf(RenderInventoryReport(inventory))

    ' Merge PDFs into one document
    Dim combined = PdfDocument.Merge(salesPdf, inventoryPdf)
    Return combined.BinaryData
End Function

Imports IronPdf

' Generate PDF with automatic table of contents
Dim renderer As New ChromePdfRenderer()
renderer.RenderingOptions.TableOfContents = TableOfContentsTypes.WithPageNumbers
Dim pdf = renderer.RenderHtmlFileAsPdf("report.html")

Imports IronPdf

' Generate PDF with automatic table of contents
Dim renderer As New ChromePdfRenderer()
renderer.RenderingOptions.TableOfContents = TableOfContentsTypes.WithPageNumbers
Dim pdf = renderer.RenderHtmlFileAsPdf("report.html")

Imports IronPdf
Imports System.Collections.Concurrent
Imports System.Threading.Tasks

' Generate multiple invoices in parallel using async processing
Public Async Function GenerateInvoiceBatchAsync(invoices As List(Of InvoiceModel)) As Task(Of List(Of ReportResult))
    Dim results As New ConcurrentBag(Of ReportResult)()

    ' Process invoices concurrently with controlled parallelism
    Await Task.Run(Async Function()
                       Await Parallel.ForEachAsync(invoices,
                           New ParallelOptions With {.MaxDegreeOfParallelism = Environment.ProcessorCount},
                           Async Function(invoice, token)
                               ' Each thread gets its own renderer instance
                               Dim renderer As New ChromePdfRenderer()
                               Dim html As String = BuildInvoiceHtml(invoice)
                               Dim pdf = Await renderer.RenderHtmlAsPdfAsync(html)

                               ' Save individual invoice PDF
                               Dim filename As String = $"Invoice_{invoice.InvoiceNumber}.pdf"
                               Await pdf.SaveAsAsync(filename)

                               results.Add(New ReportResult With {.InvoiceNumber = invoice.InvoiceNumber, .Success = True})
                           End Function)
                   End Function)

    Return results.ToList()
End Function

Imports IronPdf
Imports System.Collections.Concurrent
Imports System.Threading.Tasks

' Generate multiple invoices in parallel using async processing
Public Async Function GenerateInvoiceBatchAsync(invoices As List(Of InvoiceModel)) As Task(Of List(Of ReportResult))
    Dim results As New ConcurrentBag(Of ReportResult)()

    ' Process invoices concurrently with controlled parallelism
    Await Task.Run(Async Function()
                       Await Parallel.ForEachAsync(invoices,
                           New ParallelOptions With {.MaxDegreeOfParallelism = Environment.ProcessorCount},
                           Async Function(invoice, token)
                               ' Each thread gets its own renderer instance
                               Dim renderer As New ChromePdfRenderer()
                               Dim html As String = BuildInvoiceHtml(invoice)
                               Dim pdf = Await renderer.RenderHtmlAsPdfAsync(html)

                               ' Save individual invoice PDF
                               Dim filename As String = $"Invoice_{invoice.InvoiceNumber}.pdf"
                               Await pdf.SaveAsAsync(filename)

                               results.Add(New ReportResult With {.InvoiceNumber = invoice.InvoiceNumber, .Success = True})
                           End Function)
                   End Function)

    Return results.ToList()
End Function

Imports System
Imports System.Threading
Imports System.Threading.Tasks
Imports Microsoft.Extensions.DependencyInjection

' Background service for scheduled report generation
Public Class DailyReportService
    Inherits BackgroundService

    Private ReadOnly _serviceProvider As IServiceProvider

    Protected Overrides Async Function ExecuteAsync(stoppingToken As CancellationToken) As Task
        While Not stoppingToken.IsCancellationRequested
            ' Calculate next run time (6 AM daily)
            Dim nextRun = DateTime.Now.Date.AddDays(1).AddHours(6)
            Await Task.Delay(nextRun - DateTime.Now, stoppingToken)

            ' Create scoped service for report generation
            Using scope = _serviceProvider.CreateScope()
                Dim reportService = scope.ServiceProvider.GetRequiredService(Of IReportGenerationService)()

                ' Generate and distribute daily report
                Dim salesReport = Await reportService.GenerateDailySalesSummaryAsync()
                ' Email or save reports as needed
            End Using
        End While
    End Function
End Class

Imports System
Imports System.Threading
Imports System.Threading.Tasks
Imports Microsoft.Extensions.DependencyInjection

' Background service for scheduled report generation
Public Class DailyReportService
    Inherits BackgroundService

    Private ReadOnly _serviceProvider As IServiceProvider

    Protected Overrides Async Function ExecuteAsync(stoppingToken As CancellationToken) As Task
        While Not stoppingToken.IsCancellationRequested
            ' Calculate next run time (6 AM daily)
            Dim nextRun = DateTime.Now.Date.AddDays(1).AddHours(6)
            Await Task.Delay(nextRun - DateTime.Now, stoppingToken)

            ' Create scoped service for report generation
            Using scope = _serviceProvider.CreateScope()
                Dim reportService = scope.ServiceProvider.GetRequiredService(Of IReportGenerationService)()

                ' Generate and distribute daily report
                Dim salesReport = Await reportService.GenerateDailySalesSummaryAsync()
                ' Email or save reports as needed
            End Using
        End While
    End Function
End Class