为什么 FileMode.Create 被另一个进程使用？

Question

所以我目前正在开发一个简单的应用程序，它可以截取我的桌面屏幕截图，然后我可以通过电子邮件将其快速发送给朋友或家人。

事情是这样的.. 当我按下 Inilizalize 按钮时，它运行通过这些方法..

        screenshot();
        setImage();
        saveScreenshot();
        sendScreenImage();

截取屏幕截图 > 将屏幕截图设置为图像容器中的来源 > 将内容保存在图像容器中 > 将其发送给我想要发送给的任何人。
简单吧？

一切都很好，假设我只是运行通过拍照并保存它，每次我按

截图时它可以替换（覆盖）旧的> 设置图像 > 保存屏幕截图

但是一旦我发送它（添加 sendScreenImage(); 方法）我就不能再覆盖旧图像因为它说正在使用该过程

Error message: The process cannot access the file because it is being used by another process.

而且它总是在同一行的同一位置向我抛出该错误

using (FileStream stream = new FileStream(path, FileMode.Create))

在 saveScreenshot() 中；

--问题--

用什么进程？我是否需要对使用该进程的东西进行多线程处理，还是我可以取消它？

using System;
using System.Windows;
using System.Windows.Media.Imaging;
using System.Windows.Forms;
using System.Threading;
using System.Net.Mail;
using System.Net;
using System.IO;
using AForge.Video;
using AForge.Video.DirectShow;
using System.Drawing;
using System.Windows.Media;
using System.Drawing.Imaging;
using System.Globalization;
using System.Windows.Data;
using System.Windows.Interop;
using System.Windows.Threading;
using WPFCSharpWebCam;

namespace WebcamApplication
{
    /// <summary>
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }


        #region methods
        private void initializeToolBtn_Click(object sender, RoutedEventArgs e)
        {
            screenshot();
            setImage();
            saveScreenshot();
            sendScreenImage();
        }
        private void screenshot()
        {
            SendKeys.SendWait("{PRTSC}");
        }

        private void setImage()
        {
            System.Windows.Clipboard.GetImage();
            var clipboardImage = System.Windows.Clipboard.GetImage();
            image.Source = clipboardImage;
        }


        private void saveScreenshot()
        {
            try
            {
                string path;
                path = "%AppData%\image.png"; // collection of paths
                path = Environment.ExpandEnvironmentVariables(path);

                var encoder = new PngBitmapEncoder();
                encoder.Frames.Add(BitmapFrame.Create((BitmapSource)image.Source));
                using (FileStream stream = new FileStream(path, FileMode.Create))
                    encoder.Save(stream);
                System.Windows.MessageBox.Show("Replaced the old screenshot");
                return;
            }
            catch (Exception ex)
            {
                System.Windows.MessageBox.Show(" saveScreenshot() went wrong " + ex.ToString());
            }
        }

        private void sendScreenImage()
        {
            try
            {
                System.Windows.Clipboard.GetImage();
                var clipboardImage = System.Windows.Clipboard.GetImage();
                image.Source = clipboardImage;

                string path;
                path = "%AppData%\image.png"; // collection of paths
                path = Environment.ExpandEnvironmentVariables(path);


                MailMessage msg = new MailMessage();
                msg.From = new MailAddress(emailfromTextbox.Text, "Screenshot Image");
                msg.To.Add(new MailAddress(emailTextbox.Text));
                msg.Subject = "SCreenshot Image";
                msg.Body = clipboardImage.ToString();
                msg.IsBodyHtml = true;

                AlternateView plainView = AlternateView.CreateAlternateViewFromString("This is my plain text content, viewable by those clients that don't support html", null, "text/plain");
                AlternateView htmlView = AlternateView.CreateAlternateViewFromString("Here is an embedded image.<img src=cid:companylogo>", null, "text/html");

                //create the LinkedResource(embedded image)
                LinkedResource logo = new LinkedResource(path);
                logo.ContentId = "image.png";
                //add the LinkedResource to the appropriate view

                htmlView.LinkedResources.Add(logo);

                msg.AlternateViews.Add(plainView);
                msg.AlternateViews.Add(htmlView);


                SmtpClient smtp = new SmtpClient();
                smtp.Host = "smtp.gmail.com";
                smtp.Port = 587;
                smtp.Credentials = new NetworkCredential(emailTextbox.Text, emailpasswordTextbox.Text);
                smtp.EnableSsl = true;
                smtp.Send(msg);
                System.Windows.MessageBox.Show("Done");
            }
            catch (Exception ex)
            {
                System.Windows.MessageBox.Show(ex.ToString(), "GMAIL Error" + ex.ToString());

            }
        }

Answer 1

LinkedResource 拥有读取附件的文件流。

您需要在发送电子邮件后在 using 块中处理它。

为什么 FileMode.Create 被另一个进程使用？

Why is the FileMode.Create being used in another process?

.net

c#

process

filestream

--问题--

用什么进程？我是否需要对使用该进程的东西进行多线程处理，还是我可以取消它？