表格申请注册表项

如何解决表格申请注册表项

我有

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Media;
using Microsoft.Win32;

namespace Just_play_sounds_2
{
    public partial class Form1 : Form
    {

        private SoundPlayer soundPlayer;
        private RegistryKey reg;

        public Form1()
        {
            InitializeComponent();

            this.WindowState = FormWindowState.Minimized;
        }

        private void Form1_Load(object sender,EventArgs e)
        {
            this.Hide();

            reg = Registry.CurrentUser.OpenSubKey("SOFTWARE\\Microsoft\\Windows\\CurentVersion\\Run",true);
            reg.SetValue("Play sounds",Application.ExecutablePath.ToString());
        }
    }
}

并且正在标记这行代码

reg.SetValue("Play sounds",Application.ExecutablePath.ToString());

我已经尽一切努力使它正常工作，但它根本无法工作。我搜索了所有可以找到的东西，为此我真的可以使用一些帮助。如果您回答此问题，可以告诉我我的注册表代码做错了什么。

错误代码

System.NullReferenceException
  HResult=0x80004003
  Message=Object reference not set to an instance of an object.
  Source=Just play sounds 2
  StackTrace:
   at Just_play_sounds_2.Form1.Form1_Load(Object sender,EventArgs e) in D:\Projects\Just play sounds 2\Just play sounds 2\Form1.cs:line 37
   at System.Windows.Forms.Form.OnLoad(EventArgs e)
   at System.Windows.Forms.Form.OnCreateControl()
   at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
   at System.Windows.Forms.Control.CreateControl()
   at System.Windows.Forms.Control.WmShowWindow(Message& m)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
   at System.Windows.Forms.Form.WmShowWindow(Message& m)
   at System.Windows.Forms.Form.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd,Int32 msg,IntPtr wparam,IntPtr lparam)
   at System.Windows.Forms.UnsafeNativeMethods.SendMessage(HandleRef hWnd,Int32 wParam,Int32 lParam)
   at System.Windows.Forms.Form.SetVisibleCore(Boolean value)
   at System.Windows.Forms.Control.set_Visible(Boolean value)
   at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason,ApplicationContext context)
   at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason,ApplicationContext context)
   at System.Windows.Forms.Application.Run(Form mainForm)
   at Just_play_sounds_2.Program.Main() in D:\Projects\Just play sounds 2\Just play sounds 2\Program.cs:line 19

解决方法

通过您的编辑，现在我可以看到您的问题是What is a NullReferenceException,and how do I fix it?的重复项。最可能是因为reg变量是null，这又很可能是由于我已经提到过的印刷错误。 –彼得·杜尼奥（Peter Duniho）