Word Interop C#: Insert new page using existing page

Question

I have a word template file which contains a table and it has 11 rows and 3 columns. So there are 33 cells in table on first page. I fill these cell with some data, however if n

Answer 1

An other approach, is that you can Add the template file to the Document instead of opening it, and then just use Range.InsertFile to insert the template file after a page break on each time you reach the last cell of the table. I used a while loop just to keep your current flow and enumerating the items by using an index variable.

private static string FillTemplate(List clients, string fileName)
{
    //Filled document file name
    var savedFileName = string.Empty;
    //Search template file in current directory
    var templateFilePath = System.AppDomain.CurrentDomain.BaseDirectory + "templateFile.doc";

    //#region Generate file for labels

    object missing = System.Type.Missing;
    // Create Word application
    WORD._Application app = new WORD.Application();

    try
    {
        Print("Creating label document.");
        // Create new file
        //WORD._Document doc = app.Documents.Open(templateFilePath);
        // Instead of creating a new file, just add our template to the document
        WORD._Document doc = app.Documents.Add(templateFilePath);

        //Print("Creating app selection object");
        WORD.Selection selection = app.Selection;

        //If the template file contains tables
        if (selection.Tables.Count > 0)
        {
            //Use first table
            //Table's are accessed with starting index as 1 not 0
            var tableToUse = selection.Tables[selection.Tables.Count];

            //Counter for number of parent caregivers inserted
            var counter = 0;
            //Number of parent caregivers
            var numberOfParentCaregivers = clients.Count;
            //Loop on each row

            int rowIndex = 1, columnIndex = 1;

            while (counter < numberOfParentCaregivers)
            {
                if(columnIndex > tableToUse.Columns.Count)
                {
                    // Reset column index if we have reached the last column
                    columnIndex = 1;
                    // And go to the next row
                    rowIndex++;

                    if(rowIndex > tableToUse.Rows.Count)
                    {
                        // Reset row index if we have reached the last row
                        rowIndex = 1;
                        // Go the the end of the document, add a page break and insert our empty table template
                        object startPoint = 0;
                        WORD.Range range = doc.Range(ref startPoint, ref missing);
                        range.Collapse(WORD.WdCollapseDir‌​ection.wdCollapseEnd‌​);
                        range.InsertBreak(WORD.WdBreakTyp‌​e.wdSectionBreakNext‌​Page);
                        range.InsertFile(templateFilePath);
                        // Assign the new inserted template table to our current table to use
                        tableToUse = range.Tables[selection.Tables.Count];
                    }
                }

                var parentCaregiver = clients[counter];

                Print("Generating label to add to document.");

                //Get label to add to document
                var labelToAdd = string.Format("{0} {1},{6}{2},{6} {3}, {4} {5}", parentCaregiver.Parent1LastName, parentCaregiver.Parent1FirstName,
                    parentCaregiver.Parent1StreetAddress, parentCaregiver.Parent1City, parentCaregiver.Parent1State, parentCaregiver.Parent1Zip, Environment.NewLine);

                //Print(string.Format("Adding label {0} at {1}, {2} position.", labelToAdd, rowIndex, columnIndex));

                //Get cell to set value
                var tableCell = tableToUse.Cell(rowIndex, columnIndex);
                //Set text in cell
                tableCell.Range.Text = labelToAdd;
                //Middle align text
                tableCell.Range.ParagraphFormat.Alignment = WORD.WdParagraphAlignment.wdAlignParagraphCenter;

                Print(string.Format("Label added {0} at {1}, {2} position.", labelToAdd, rowIndex, columnIndex));
                // Increate items counter and columns counter on each loop
                counter++;
                columnIndex++;
            }
        }

        // Set file name to save
        savedFileName = string.Format(@"{0}{1}{2}", Path.GetTempPath(), fileName, Path.GetExtension(templateFilePath));
        object fname = savedFileName;
        Print(string.Format("Saving new document at {0}", savedFileName));
        // SaveAs new file
        doc.SaveAs(ref fname, 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);
        Print(string.Format("{0} saved successfully.", savedFileName));
        app.Documents.Close(ref missing, ref missing, ref missing);
    }
    catch (Exception exc)
    {
        Print("Exception while generating label document");
        Print(exc.ToString());
        //Set file Name to empty string
        savedFileName = string.Empty;
    }
    finally
    {
        // Close Word application
        app.Quit(ref missing, ref missing, ref missing);
        Marshal.ReleaseComObject(app);
        app = null;
        GC.Collect();
        GC.WaitForPendingFinalizers();
        GC.Collect();
        GC.WaitForPendingFinalizers();
    }

    //Return saved file name
    return savedFileName;
}