Default.aspx.vb

Imports System
Imports System.Collections.Generic
Imports System.IO
Imports System.Net
Imports System.Web.UI
Imports DevExpress.XtraRichEdit
Imports DevExpress.XtraRichEdit.API.Native

Public Partial Class _Default
    Inherits Page

    Private documentServer As RichEditDocumentServer = Nothing

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
        documentServer = New RichEditDocumentServer()
        If Request.QueryString.Count > 0 AndAlso Request.QueryString(0).StartsWith("preview") Then
            RefreshPreview(Request.QueryString(0))
        End If
    End Sub

    Private Sub RefreshPreview(ByVal previewName As String)
        Response.StatusCode = CInt(HttpStatusCode.OK)
        Response.ContentType = "text/html"
        Dim outputStream As Stream = ExecuteMerge(previewName, DocumentFormat.Html)
        outputStream.Seek(0, SeekOrigin.Begin)
        Copy(outputStream, Response.OutputStream)
        Response.End()
    End Sub

    Private Function ExecuteMerge(ByVal templateName As String, ByVal documentFormat As DocumentFormat) As Stream
        Dim result As Stream = New MemoryStream()
        Dim mailMergeOptions As MailMergeOptions = documentServer.CreateMailMergeOptions()
        If Equals(templateName, "preview1") Then
            documentServer.LoadDocument(Page.MapPath("~/App_Data/InvoicesDetail.rtf"))
            Dim invoices As List(Of Invoice) = New List(Of Invoice)(10)
            invoices.Add(New Invoice(0, "Invoice1", 10.0D))
            invoices.Add(New Invoice(1, "Invoice2", 15.0D))
            invoices.Add(New Invoice(2, "Invoice3", 20.0D))
            mailMergeOptions.DataSource = invoices
        ElseIf Equals(templateName, "preview2") Then
            documentServer.LoadDocument(Page.MapPath("~/App_Data/SamplesDetail.rtf"))
            mailMergeOptions.DataSource = ManualDataSet.CreateData().Tables(0)
        ElseIf Equals(templateName, "all") Then
            Dim part1 As Stream = ExecuteMerge("preview1", documentFormat)
            Dim part2 As Stream = ExecuteMerge("preview2", documentFormat)
            part1.Seek(0, SeekOrigin.Begin)
            part2.Seek(0, SeekOrigin.Begin)
            documentServer.LoadDocument(part1, documentFormat)
            documentServer.Document.AppendDocumentContent(part2, documentFormat)
            documentServer.SaveDocument(result, documentFormat)
            Return result
        End If

        documentServer.Options.Export.Html.EmbedImages = True
        mailMergeOptions.MergeMode = MergeMode.JoinTables
        documentServer.MailMerge(mailMergeOptions, result, documentFormat)
        Return result
    End Function

    Protected Sub btnDownload_Click(ByVal sender As Object, ByVal e As EventArgs)
        Dim outputStream As Stream = ExecuteMerge("all", DocumentFormat.Rtf)
        outputStream.Seek(0, SeekOrigin.Begin)
        Copy(outputStream, Response.OutputStream)
        Response.StatusCode = CInt(HttpStatusCode.OK)
        Response.ContentType = "application/rtf"
        Response.AddHeader("Content-Disposition", "attachment; filename=RichEditMailMerge.rtf")
        Response.End()
    End Sub
End Class