C#获取文件md5码

代码

/// <summary>
/// 原文链接：https://blog.csdn.net/makenothing/article/details/39493779
/// </summary>
/// <param name="fileName"></param>
/// <returns></returns>
/// <exception cref="Exception"></exception>
private static string GetMD5HashFromFile(string fileName)
{try{FileStream file = new FileStream(fileName, FileMode.Open);System.Security.Cryptography.MD5 md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();byte[] retVal = md5.ComputeHash(file);file.Close();StringBuilder sb = new StringBuilder();for (int i = 0; i < retVal.Length; i++){sb.Append(retVal[i].ToString("x2"));}return sb.ToString();}catch (Exception ex){throw new Exception("GetMD5HashFromFile() fail,error:" + ex.Message);}
}

选择文件

private void btnSelectFile1_Click(object sender, EventArgs e)
{using (OpenFileDialog openFileDialog = new OpenFileDialog()){openFileDialog.InitialDirectory = "C:\\Users\\jay.star\\Desktop"; // 初始目录openFileDialog.Title = "选择文件"; // 对话框标题openFileDialog.Filter = "所有文件(*.*)|*.*"; // 文件过滤器if (openFileDialog.ShowDialog() == DialogResult.OK){// 获取文件路径string filePath = openFileDialog.FileName;var md5Str = GetMD5HashFromFile(filePath);txtFile1.Text = md5Str;}}
}