Edit Microsoft Word Document From Your Application

Rudra Sankar

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14 May 2009CPOL1 min read

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Create & edit Microsoft Word document from Windows application Form by using C#

Introduction

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.

Background

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

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

Code behind the button:

//	
private void btnlettergen_Click(object sender, EventArgs e)
{
//  create offer letter
                try
                {
//  Just to kill WINWORD.EXE if it is running
                    killprocess("winword");	
//  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);
                        aDoc.Activate();
//  Call FindAndReplace()function for each change
                        this.FindAndReplace(wordApp, "<Date>", dtpDate.Text);
                        this.FindAndReplace(wordApp, "<Name>", txName.Text.Trim());
                        this.FindAndReplace(wordApp, "<Subject>", 
					txtSubject.Text.Trim());
//  save temp.doc after modified
                        aDoc.Save();
                    }
                    else
                        MessageBox.Show("File does not exist.", 
				"No File", MessageBoxButtons.OK, 
				MessageBoxIcon.Information);
                    killprocess("winword");
                }
                catch (Exception)
                {
                    MessageBox.Show("Error in process.", "Internal Error", 
			MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
}

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);
}