Mail Merge Using C#

I was looking for doing a mail merge application and went through the web and found a good article from Microsoft link .This automates Microsoft Word to perform Mail Merge using C#.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using Word = Microsoft.Office.Interop.Word;namespace mailmersamp1
public partial class Form1 : Form
public Form1()

Word.Application wrdApp;
Word._Document wrdDoc;
Object oMissing = System.Reflection.Missing.Value;
Object oFalse = false;

private void InsertLines(int LineNum)
int iCount;

// Insert “LineNum” blank lines.
for (iCount = 1; iCount {

private void FillRow(Word._Document oDoc, int Row, string Text1, string Text2, string Text3, string Text4)
// Insert the data into the specific cell.
oDoc.Tables[1].Cell(Row, 1).Range.InsertAfter(Text1);
oDoc.Tables[1].Cell(Row, 2).Range.InsertAfter(Text2);
oDoc.Tables[1].Cell(Row, 3).Range.InsertAfter(Text3);
oDoc.Tables[1].Cell(Row, 4).Range.InsertAfter(Text4);

private void CreateMailMergeDataFile()
Word._Document oDataDoc;
int iCount;
Object oName = “C:\TempDoc.doc”;
Object oHeader = “FirstName, LastName, Address, CityStateZip”; wrdDoc.MailMerge.CreateDataSource(ref oName, ref oMissing,ref oMissing, ref oHeader, ref oMissing, ref oMissing,ref oMissing, ref oMissing, ref oMissing);

// Open the file to insert data.
oDataDoc = wrdApp.Documents.Open(ref oName, ref oMissing,ref oMissing, ref oMissing, ref oMissing, ref oMissing,ref oMissing, ref oMissing, ref oMissing, ref oMissing,ref oMissing, ref oMissing, ref oMissing, ref oMissing,ref oMissing, ref oMissing);

for (iCount = 1; iCount {
oDataDoc.Tables[1].Rows.Add(ref oMissing);
// Fill in the data.

FillRow(oDataDoc, 2, “Roy”, “John”,”45 Main Street”, “Chennai, IND 6399873″);
FillRow(oDataDoc, 3, “Jan”, “Mike”,”34 cross Street”, “Trichy, IND 620006″);

// Save and close the file.
oDataDoc.Close(ref oFalse, ref oMissing, ref oMissing);

private void button1_Click(object sender, System.EventArgs e)
Word.Selection wrdSelection;
Word.MailMerge wrdMailMerge;
Word.MailMergeFields wrdMergeFields;
Word.Table wrdTable;
string StrToAdd;

wrdApp = new Word.Application();
wrdApp.Visible = false;

// Add a new document.
wrdDoc = wrdApp.Documents.Add(ref oMissing, ref oMissing,ref oMissing, ref oMissing);

wrdSelection = wrdApp.Selection;
wrdMailMerge = wrdDoc.MailMerge;

// Create a MailMerge Data file.

// Create a string and insert it into the document.
StrToAdd = “Mail Merge”;
wrdSelection.ParagraphFormat.Alignment =Word.WdParagraphAlignment.wdAlignParagraphCenter;


// Insert merge data.
wrdSelection.ParagraphFormat.Alignment =
wrdMergeFields = wrdMailMerge.Fields;
wrdMergeFields.Add(wrdSelection.Range, “FirstName”);
wrdSelection.TypeText(” “);
wrdMergeFields.Add(wrdSelection.Range, “LastName”);

wrdMergeFields.Add(wrdSelection.Range, “Address”);
wrdMergeFields.Add(wrdSelection.Range, “CityStateZip”);


// Right justify the line and insert a date field
// with the current date.
wrdSelection.ParagraphFormat.Alignment =

Object objDate = “dddd, MMMM dd, yyyy”;
wrdSelection.InsertDateTime(ref objDate, ref oFalse, ref oMissing,
ref oMissing, ref oMissing);


// Justify the rest of the document.
wrdSelection.ParagraphFormat.Alignment =

wrdSelection.TypeText(“Dear “);
wrdMergeFields.Add(wrdSelection.Range, “FirstName”);

// Create a string and insert it into the document.
StrToAdd = “Thank you for using Mail Merge.”;


// Insert a new table with 3 rows and 4 columns.
wrdTable = wrdDoc.Tables.Add(wrdSelection.Range, 3, 4,
ref oMissing, ref oMissing);

// Set the column widths.
wrdTable.Columns[1].SetWidth(100, Word.WdRulerStyle.wdAdjustNone);
wrdTable.Columns[2].SetWidth(100, Word.WdRulerStyle.wdAdjustNone);
wrdTable.Columns[1].SetWidth(100, Word.WdRulerStyle.wdAdjustNone);
wrdTable.Columns[2].SetWidth(100, Word.WdRulerStyle.wdAdjustNone);

// Set the shading on the first row to light gray.
wrdTable.Rows[1].Cells.Shading.BackgroundPatternColorIndex =

// Bold the first row.
wrdTable.Rows[1].Range.Bold = 1;

// Center the text in Cell (1,1).
wrdTable.Cell(1, 1).Range.Paragraphs.Alignment =

// Fill each row of the table with data.
FillRow(wrdDoc, 1, “Number”, “Name”,”Dept”,”Note”);
FillRow(wrdDoc, 2, “100”, “abc”,”Cse”,”New”);
FillRow(wrdDoc, 3, “101”, “def”,”Ece”,”New”);

// Go to the end of the document.
Object oConst1 = Word.WdGoToItem.wdGoToLine;
Object oConst2 = Word.WdGoToDirection.wdGoToLast;
wrdApp.Selection.GoTo(ref oConst1, ref oConst2, ref oMissing, ref oMissing);

// Create a string and insert it into the document.
StrToAdd = “n For additional information regarding the ” +
“Mail Merge, ” + “you can visit our Web Site at “;

// Insert a hyperlink to the Web page.
Object oAddress = “”;
Object oRange = wrdSelection.Range;
wrdSelection.Hyperlinks.Add(oRange, ref oAddress, ref oMissing,
ref oMissing, ref oMissing, ref oMissing);

// Create a string and insert it into the document
StrToAdd = “. Thank you for your interest in Mail Merge. rnrn” +
“Sincerely,rn” + “Jackrn”;

// Perform mail merge.
wrdMailMerge.Destination = Word.WdMailMergeDestination.wdSendToNewDocument;
e(ref oFalse);

// Close the original form document.
wrdDoc.Saved = true;
wrdDoc.Close(ref oFalse, ref oMissing, ref oMissing);

// Makes the merged doc visible
wrdApp.Visible = true;

// Release References.
wrdSelection = null;
wrdMailMerge = null;
wrdMergeFields = null;
wrdDoc = null;
wrdApp = null;

// Clean up temp file.

Download Zip

Note :

We get a error when the concatenated fields string length exceeds 255. To Overcome we can use excel as datasource instead of word.

Using Excel as Datasource

3 thoughts on “Mail Merge Using C#

  1. Just killing some in between class time on Stumbleupon and I found your post . Not typically what I prefer to learn about, but it was definitely worth my time. Thanks.

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