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This post is related to/same as a previous post VB: Opens Office Documents in Web Browser Control

Use the following steps to create a C# application that opens Office documents:

1. Start Visual Studio and create a new C# project.  Form1 created by default.
2. From the Components toolbox, Add an instance of the WebBrowser control, CommonDialog control, and a CommandButton to Form1.
3. Next, add the following code into the Code window for Form1:

object oDocument;
 
private void button1_Click(object sender, EventArgs e)
 {
 string sFileName;
 openFileDialog1.FileName = "";
 openFileDialog1.ShowDialog();
 sFileName = openFileDialog1.FileName;
 
 if (sFileName.Length!=0)
 {
 oDocument = null;
 webBrowser1.Navigate(sFileName);
 }
 }
 
 private void Form1_Load(object sender, EventArgs e)
 {
 openFileDialog1.Filter = "Office Documents " + " " + "(*.doc, *.xls, *.ppt)|*.doc;*.xls;*.ppt";
 openFileDialog1.FilterIndex = 1;
 
 }
 
 private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
 {
 oDocument = webBrowser1.Document;
 
 }

1. Press F5 to run the project. When you select the Browse button, the Open dialog box appears allowing you to navigate to a Word, Excel or PowerPoint file.
2. Choose Open and the document should open inside the WebBrowser control.