How to open a document in c#

There are three ways to open a document: Using the System.IO.File class: Open and read the file contents. Using the System.IO.FileStream class: Provides lower-level file operations that allow reading, writing, and locating file contents. Use third-party libraries, such as DocumentFormat.OpenXml, to provide advanced functionality for specific file formats.

How to open a document using C

#Method 1: Using the System.IO.File class

The System.IO.File class provides convenient methods for opening files.

<code class="c#">using System.IO;

namespace OpenDocumentExample
{
    class Program
    {
        static void Main(string[] args)
        {
            // 打开文件
            string filePath = @"C:\path\to\document.txt";
            StreamReader file = new StreamReader(filePath);

            // 读取文件内容
            string contents = file.ReadToEnd();

            // 关闭文件
            file.Close();
        }
    }
}</code>

Method 2: Use the System.IO.FileStream class

The System.IO.FileStream class provides a lower-level method of opening files. FileStream can be used to read, write, and locate file contents.

<code class="c#">using System.IO;

namespace OpenDocumentExample
{
    class Program
    {
        static void Main(string[] args)
        {
            // 打开文件
            string filePath = @"C:\path\to\document.txt";
            FileStream fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read);

            // 读取文件内容
            byte[] buffer = new byte[fileStream.Length];
            fileStream.Read(buffer, 0, buffer.Length);
            string contents = System.Text.Encoding.UTF8.GetString(buffer);

            // 关闭文件
            fileStream.Close();
        }
    }
}</code>

Method 3: Use third-party libraries

There are also some third-party libraries that can provide more advanced file opening functions, such as libraries for specific file formats. A popular library is [DocumentFormat.OpenXml](https://www.nuget.org/packages/DocumentFormat.OpenXml).

<code class="c#">using DocumentFormat.OpenXml.Packaging;

namespace OpenDocumentExample
{
    class Program
    {
        static void Main(string[] args)
        {
            // 打开 Word 文档
            string filePath = @"C:\path\to\document.docx";
            using (WordprocessingDocument document = WordprocessingDocument.Open(filePath, false))
            {
                // 获取文档内容
                Body body = document.MainDocumentPart.Document.Body;
            }
        }
    }
}</code>

The above is the detailed content of How to open a document in c#. For more information, please follow other related articles on the PHP Chinese website!