Merge (Combine) multiple RTF files into one (single) using C# and VB.Net in ASP.Net

Hi dnnyobi,

Refer below sample code.

Namespaces

C#

using System.IO;

VB.Net

Imports System.IO

Code

C#

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        string[] allRTFDocument = Directory.GetFiles(Server.MapPath("~/Files"), "*.rtf");
        Merge(allRTFDocument, Server.MapPath("~/Folder/Final.rtf"), true);
    }
}

public static void Merge(string[] filesToMerge, string outputFilename, bool insertPageBreaks)
{
    object missing = System.Type.Missing;
    object pageBreak = Microsoft.Office.Interop.Word.WdBreakType.wdSectionBreakNextPage;
    object outputFile = outputFilename;
    Microsoft.Office.Interop.Word._Application wordApplication = new Microsoft.Office.Interop.Word.Application();
    try
    {
        Microsoft.Office.Interop.Word.Document wordDocument = wordApplication.Documents.Add(
                                        ref missing
                                    , ref missing
                                    , ref missing
                                    , ref missing);
        Microsoft.Office.Interop.Word.Selection selection = wordApplication.Selection;
        int documentCount = filesToMerge.Length;
        int breakStop = 0;
        foreach (string file in filesToMerge)
        {
            breakStop++;
            selection.InsertFile(file, ref missing, ref missing, ref missing, ref missing);
            if (insertPageBreaks && breakStop != documentCount)
            {
                selection.InsertBreak(ref pageBreak);
            }
        }
        wordDocument.SaveAs(
                    ref outputFile
                    , ref missing
                    , ref missing
                    , ref missing
                    , ref missing
                    , ref missing
                    , ref missing
                    , ref missing
                    , ref missing
                    , ref missing
                    , ref missing
                    , ref missing
                    , ref missing
                    , ref missing
                    , ref missing
                    , ref missing);
        wordDocument = null;
    }
    catch (Exception ex)
    {
        throw ex;
    }
    finally
    {
        wordApplication.Quit(ref missing, ref missing, ref missing);
    }
}

VB.Net

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
    If Not Me.IsPostBack Then
        Dim allRTFDocument As String() = Directory.GetFiles(Server.MapPath("~/Files"), "*.rtf")
        Merge(allRTFDocument, Server.MapPath("~/Folder/Final.rtf"), True)
    End If
End Sub

Public Shared Sub Merge(ByVal filesToMerge As String(), ByVal outputFilename As String, ByVal insertPageBreaks As Boolean)
    Dim missing As Object = System.Type.Missing
    Dim pageBreak As Object = Microsoft.Office.Interop.Word.WdBreakType.wdSectionBreakNextPage
    Dim outputFile As Object = outputFilename
    Dim wordApplication As Microsoft.Office.Interop.Word._Application = New Microsoft.Office.Interop.Word.Application()
    Try
        Dim wordDocument As Microsoft.Office.Interop.Word.Document = wordApplication.Documents.Add(missing, missing, missing, missing)
        Dim selection As Microsoft.Office.Interop.Word.Selection = wordApplication.Selection
        Dim documentCount As Integer = filesToMerge.Length
        Dim breakStop As Integer = 0
        For Each file As String In filesToMerge
            breakStop += 1
            selection.InsertFile(file, missing, missing, missing, missing)

            If insertPageBreaks AndAlso breakStop <> documentCount Then
                selection.InsertBreak(pageBreak)
            End If
        Next
        wordDocument.SaveAs(outputFile, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing)
        wordDocument = Nothing
    Catch ex As Exception
        Throw ex
    Finally
        wordApplication.Quit(missing, missing, missing)
    End Try
End Sub