How to do a Mail Merge in C# using Interop.Word?

问题

I have a template in Word that would be used to print out invoices.

Now, I would like to know how to create a Word Document programmatically and copy the template content into the new document so that I still have a clean template, then replace placeholders that I have typed by using Mail.Merge. I found similar Mail.Merge questions but most require Spire components and I am not interested since it needs to be paid for. I am only a student. Others though, actually doesn't help that much.

The problems I am facing now are as follows:

Create a Word document
Copy template content into new document
How to add placeholder names into MailMerge since I'm very confused about this.
Do MailMerge

Here is the current code that I have concocted, this is actually the first time I have used Interops

Document document = new Document();
Microsoft.Office.Interop.Word.Application wordApp = new Microsoft.Office.Interop.Word.Application();
document = wordApp.Documents.Open(fileName);
string[] fieldNames = {"date_issued", "month_covered", "tuition", "lunchfee", "discount", "in_no", "student_no", "student_name", "amount_due", "amount_paid", "balance", "penalty", "status"};
string[] data = new string[25];
Range range;
document.MailMerge.Fields.Add(range, fieldNames[0]);
document.MailMerge.Execute();

I'm really confused on this part

document.MailMerge.Fields.Add(range, fieldNames[0]);

and I don't know what range is for

回答1:

If your template is an actual template and not a plain Word Document (with the extension .dotx or .dot, and not .docx/.doc), you don't need to copy anything. Just create a new document based on the template:

var doc = wordApp.Documents.Add("put template path here");

This will have the contents of your template. If you have used the Word UI to setup a mailmerge in the template (including the location of the data for the merge), that will also be carried over into the new document.

Then you can execute the mailmerge from C#:

doc.MailMerge.Execute();

来源：https://stackoverflow.com/questions/13180654/how-to-do-a-mail-merge-in-c-sharp-using-interop-word

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printing

interop

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