如何从注册表中获取密钥的默认值

Question

I am trying get the (Default) key value from the HKEY_CLASSES_ROOT and the code snippet I tried is as below,

using (var key = Registry.ClassesRoot.OpenSubKey(@"Excel.Application\\CurVer"))
{
    var defvalue = key?.GetValue("(Default)");
    if (defvalue != null)
    {
    }
}

Always the defvalue is coming as null. I am not able trace out what mistake I am doing.

Could anyone please help me to resolve this.

Answer 1

Instead of using "(Default)" you need to use an emtpy string "".

using (var key = Registry.ClassesRoot.OpenSubKey(@"Excel.Application\\CurVer"))
{
    var defvalue = key?.GetValue("");
    if (defvalue != null)
    {
    }
}

Answer 2

您还可以尝试使用“String.Empty”来获取注册表的“（默认）”值，而不是在代码中访问“（默认）”。