C＃如何检查注册表值是否存在？ [英] C# How To Check If Registry Value Exist?

问题描述

大家好。

我想知道如何检查C＃中是否存在Registry值。

i知道如何在VB中执行此操作：

Hello all.
I would like to know how to check if a Registry value exist in C#.
i know how to do this in VB:

If Microsoft.Win32.Registry.GetValue("HKEY_CURRENT_USER\Software\Number Averaging Program", "SpeechEnable", Nothing) Is Nothing Then
    MsgBox("There Are No Registry Settings To Delete!", Microsoft.VisualBasic.MsgBoxStyle.OkOnly, "Number Averaging Program")
Else
    Microsoft.Win32.Registry.CurrentUser.DeleteSubKey("Software\Number Averaging Program")
    MsgBox("Registry Settings Cleared Successfully!", Microsoft.VisualBasic.MsgBoxStyle.OkOnly, "Number Averaging Program")
End If

但是我怎么用C＃做这个？

这是我到目前为止（它在C＃中）：

But how would i do this in C#?
Here is what i have so far(its in C#):

if (Microsoft.Win32.Registry.GetValue("HKEY_CURRENT_USER\\Software\\On Screen Keyboard", "SpeechSave", null) is Nullable)
{
    Registry.SetValue("HKEY_CURRENT_USER\\Software\\On Screen Keyboard\\Directories", "DictationEnabled", false);
}

感谢您的所有帮助。

Thanks for all of your help in advance.

推荐答案

你只需要添加使用到Microsoft.Win32命名空间（VB.NET项目由deafult），其余是相同的...

All you need is to add using to Microsoft.Win32 namespace (VB.NET project has it by deafult) and the rest is the same...

using Microsoft.Win32;

// ...

if (Registry.GetValue(@"HKEY_CURRENT_USER\Software\Key-Name", "Value-Name", null) == null)
{
  // ...
}

MasterCodeon365写道：

MasterCodeon365 wrote:

可以为Nullable

is Nullable

有你的问题 - 这不是你在C＃中检查 null / Nothing 的方式。

There's your problem - that's not how you check for null / Nothing in C#.

if (Registry.GetValue("HKEY_CURRENT_USER\\Software\\Number Averaging Program", "SpeechEnable", null) == null)
{
    MessageBox.Show("There Are No Registry Settings To Delete!", "Number Averaging Program");
}
else
{
    Registry.CurrentUser.DeleteSubKey("Software\\Number Averaging Program");
    MessageBox.Show("Registry Settings Cleared Successfully!", "Number Averaging Program");
}

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