The following demo project shows how to upload a Word document file to a web server and then use Microsoft.Office.Interop.Word to read the file.
Pre-requisites:
- MS Word installed on Web Server computer. (Open Word to ensure that no MessageBox appears--such as "Microsoft Word isn't your default program for viewing and editing documents...")
- Website contains a folder named: Uploads
Create an ASP .NET Web Application
VS 2017:
- Open Visual Studio
- Expand Installed
- Expand Visual C#
- Click Web
- Select ASP.NET Web Application (.NET Framework)
- Click OK
- Select Empty
- Click OK
VS 2019:
- Open Visual Studio
- Click Continue without code
- Click File
- Select New
- Select Project
- C# Windows Web
- Click ASP .NET Web Application (.NET Framework)
- Click Next
- Specify project name (name: AspNetWebApp2)
- Click Create
- Click Empty
- Uncheck Configure for HTTPS
- Click Create
Note: From this point forward, the process is the same for both VS 2017 and VS 2019.
Add WebForm:
- In VS menu, click Project
- Select Add New Item
- Select Web Form (name: default.aspx)
- Click Add
Open Solution Explorer
- In VS menu, click View
- Select Solution Explorer
In Solution Explorer, double-click "default3.aspx". Replace the code with the following:
default3.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default3.aspx.cs" Inherits="AspNetWebApp2.Default3" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<h3> File Upload:</h3>
<br />
<asp:FileUpload ID="FileUpload1" runat="server" />
<br /><br />
<asp:Button ID="btnsave" runat="server" onclick="btnsave_Click" Text="Save" style="width:85px" />
<br /><br />
<asp:Label ID="lblmessage" runat="server" />
</div>
<div>
<h2>Data:</h2>
<div>
<asp:TextBox ID="textBoxData" runat="server" Height="336px" TextMode="MultiLine" Width="603px"></asp:TextBox>
</div>
</div>
</form>
</body>
</html>
Add a reference (Microsoft Word xx.0 Object Library)
- In VS menu, click Project
- Select Add Reference
- Expand COM
- Check Microsoft Word xx.0 Object Library (ex: Microsoft Word 16.0 Object Library)
In Solution Explorer, double-click "default3.aspx.cs" and replace the code with the following:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Text;
using System.Diagnostics;
using System.IO;
using System.Runtime.InteropServices;
using Word = Microsoft.Office.Interop.Word;
namespace AspNetWebApp2
{
public partial class Default3 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void btnsave_Click(object sender, EventArgs e)
{
bool isVisible = true;
StringBuilder sb = new StringBuilder();
Word.Application wordApp = null;
Word.Document doc = null;
Word.Documents documents = null;
if (FileUpload1.HasFile)
{
try
{
sb.AppendFormat(" Uploading file: {0}", FileUpload1.FileName);
//saving the file
string localDir = System.IO.Path.Combine(Server.MapPath("."), "Uploads");
if (!System.IO.Directory.Exists(localDir))
{
string errMsg = String.Format("<script>alert('Error - Folder does not exist ({0})');</script>", localDir.Replace(@"\",@"\\"));
Response.Write(errMsg);
}
string localFn = System.IO.Path.Combine(Server.MapPath("."), "Uploads", FileUpload1.FileName);
FileUpload1.SaveAs(localFn);
//Showing the file information
sb.AppendFormat("<br/> Save As: {0}", FileUpload1.PostedFile.FileName);
sb.AppendFormat("<br/> File type: {0}", FileUpload1.PostedFile.ContentType);
sb.AppendFormat("<br/> File length: {0}", FileUpload1.PostedFile.ContentLength);
sb.AppendFormat("<br/> File name: {0}", FileUpload1.PostedFile.FileName);
wordApp = new Word.Application();
//suppress displaying alerts (such as prompting to overwrite existing file)
wordApp.DisplayAlerts = Word.WdAlertLevel.wdAlertsNone;
//set Word visibility
//wordApp.Visible = false;
wordApp.Visible = isVisible;
if (wordApp != null)
{
if (File.Exists(localFn))
{
StringBuilder sbData = new StringBuilder();
doc = wordApp.Documents.Open(localFn, System.Reflection.Missing.Value, false, System.Reflection.Missing.Value, System.Reflection.Missing.Value, System.Reflection.Missing.Value, System.Reflection.Missing.Value, System.Reflection.Missing.Value, System.Reflection.Missing.Value, System.Reflection.Missing.Value, System.Reflection.Missing.Value, isVisible, System.Reflection.Missing.Value, System.Reflection.Missing.Value, System.Reflection.Missing.Value, System.Reflection.Missing.Value);
//doc = documents.Open(localFn);
doc.Activate();
foreach (Word.Paragraph p in doc.Content.Paragraphs)
{
Debug.WriteLine(p.Range.Text);
//Response.Write(p.Range.Text);
sbData.AppendLine(p.Range.Text);
}
textBoxData.Text = sbData.ToString();
}
else
{
Debug.WriteLine("Error: Filename '" + localFn + "' doesn't exist.");
}
}
}
catch (Exception ex)
{
sb.Append("<br/> Error <br/>");
sb.AppendFormat("Unable to save file <br/> {0}", ex.Message);
}
finally
{
if (doc != null)
{
doc.Close();
}
if (documents != null)
{
documents.Close();
}
if (wordApp != null)
{
wordApp.Quit();
wordApp = null;
}
}
}
else
{
lblmessage.Text = sb.ToString();
}
Debug.WriteLine(sb.ToString());
}
}
}
Resources:
