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Posted 14 May 2009

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Edit Microsoft Word Document From Your Application

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4.24/5 (16 votes)
14 May 2009CPOL1 min read
Create & edit Microsoft Word document from Windows application Form by using C#


I faced this problem when I was developing a small tool to write official letters. My requirements were, letter template & content can be changed any time and application will help to get only inputs like, sent to name, organization name, date, etc. and after that when user presses finish button, the letter should be ready for print out along with predefined content & inputs. 


To solve this, I used Microsoft VS 2005 with C# 2.0. 

Here are the steps I followed:  

Add Microsoft.Office.Interop.Word reference to the project from COM Component as follows:


This will automatically add VBIDE, Microsoft.Office.Core along with Microsoft.Office.Interop.Word as references.

Now create a Microsoft Word document with the fields <Name>, <Date>, <Subject> and letter body. Then place all 3 variables (I called these variables because these will be changed automatically based on user input) where they belong. I did the following:


Now design your form in VS IDE. I did it like this:


Using the Code

  1. Now let's do some coding…..ya….. so here is my sample coding.
    using Word = Microsoft.Office.Interop.Word;//<- this is what I am talking about
  2. Code behind the button:
    private void btnlettergen_Click(object sender, EventArgs e)
    //  create offer letter
    //  Just to kill WINWORD.EXE if it is running
    //  copy letter format to temp.doc
                        File.Copy("C:\\OfferLetter.doc", "c:\\temp.doc", true);   
    //  create missing object
                        object missing = Missing.Value;
    //  create Word application object
                        Word.Application wordApp = new Word.ApplicationClass();
    //  create Word document object
                        Word.Document aDoc = null;
    //  create & define filename object with temp.doc
                        object filename = "c:\\temp.doc";
    //  if temp.doc available
                        if (File.Exists((string)filename))  
                            object readOnly = false;
                            object isVisible = false;
    //  make visible Word application
                            wordApp.Visible = false;
    //  open Word document named temp.doc
                            aDoc = wordApp.Documents.Open(ref filename, ref missing, 
    			ref readOnly, ref missing,ref missing, ref missing, 
    			ref missing, ref missing, ref missing, ref missing, 
    			ref missing,ref isVisible, ref missing, ref missing, 
    			ref missing, ref missing);
    //  Call FindAndReplace()function for each change
                            this.FindAndReplace(wordApp, "<Date>", dtpDate.Text);
                            this.FindAndReplace(wordApp, "<Name>", txName.Text.Trim());
                            this.FindAndReplace(wordApp, "<Subject>", 
    //  save temp.doc after modified
                            MessageBox.Show("File does not exist.", 
    				"No File", MessageBoxButtons.OK, 
                    catch (Exception)
                        MessageBox.Show("Error in process.", "Internal Error", 
    			MessageBoxButtons.OK, MessageBoxIcon.Error);
  3. Create FindAndReplace():
    private void FindAndReplace(Word.Application wordApp, 
    			object findText, object replaceText)
                object matchCase = true;
                object matchWholeWord = true;
                object matchWildCards = false;
                object matchSoundsLike = false;
                object matchAllWordForms = false;
                object forward = true;
                object format = false;
                object matchKashida = false;
                object matchDiacritics = false;
                object matchAlefHamza = false;
                object matchControl = false;
                object read_only = false;
                object visible = true;
                object replace = 2;
                object wrap = 1;
                wordApp.Selection.Find.Execute(ref findText, ref matchCase,
                    ref matchWholeWord, ref matchWildCards, ref matchSoundsLike,
                    ref matchAllWordForms, ref forward, ref wrap, ref format,
                    ref replaceText, ref replace, ref matchKashida, 
    						ref matchDiacritics,
                    ref matchAlefHamza, ref matchControl);

Now check out your temp.doc file in C:\, all variables defined under ‘<>’ are replaced with the input values. How's that! 

So, enjoy your coding….. happy coding!


  • 14th May, 2009: Initial post


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


About the Author

Rudra Sankar
Software Developer
India India
I love coding.... yes.... I do....!

Comments and Discussions

Questionmissing download link Pin
developerc sapphire5-Jan-18 20:19
Memberdeveloperc sapphire5-Jan-18 20:19 
QuestionClearFormatting(), Marshal.ReleaseComObject(object) left out! Pin
kp4231-Aug-16 9:27
Memberkp4231-Aug-16 9:27 
QuestionHow to handle check box and radio button in same example? Pin
shiva22393-Apr-15 0:47
Membershiva22393-Apr-15 0:47 
QuestionHow do I replace the text which is in some font in Word Document? Pin
Nirajan Pant29-Dec-14 15:21
MemberNirajan Pant29-Dec-14 15:21 
GeneralMy vote of 1 Pin
Tony496613-Oct-14 2:25
MemberTony496613-Oct-14 2:25 
Questionmissing Pin
aalhanane18-Dec-13 12:32
Memberaalhanane18-Dec-13 12:32 
SuggestionCode doesn't work as expected Pin
Pavan Gayakwad20-Mar-13 0:36
MemberPavan Gayakwad20-Mar-13 0:36 
SuggestionFor those experiencing issues... Pin
Alejandro Miralles23-Nov-12 5:43
MemberAlejandro Miralles23-Nov-12 5:43 
QuestionRecive Error Pin
mymina10-Aug-12 17:18
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GeneralMy vote of 5 Pin
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Generaltank you Pin
morteza fakoor22-May-12 23:51
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QuestionError on execution Pin
Moneer Tarabishi4-Mar-12 1:31
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QuestionHow about using mail merge? Pin
Robert Hutch1-Mar-12 0:02
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GeneralMy vote of 5 Pin
poornesh sharma28-Feb-12 1:10
professionalpoornesh sharma28-Feb-12 1:10 
BugError in process Pin
Sarvesh Kumar Gupta18-Nov-11 23:47
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QuestionThank you! Pin
c4mel0t13-Jul-11 23:06
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GeneralEdit Microsoft Word Document From Your Application Pin
amitrajahuja23-Nov-10 3:36
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Generalquestion Pin
waelstaitieh5-Mar-10 22:57
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GeneralOffice Versions Pin
maspr20-May-09 3:13
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GeneralRe: Office Versions Pin
Jacques Bourgeois20-May-09 13:52
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GeneralRe: Office Versions Pin
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GeneralImages Pin
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GeneralOuch! PinPopular
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GeneralRe: Ouch! Pin
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GeneralRe: Ouch! Pin
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