public struct data
{
public int[] version;
public string[] pathh;
}
private data GetPath(string p)
{
data d = new data();
RegistryKey hkcu = Registry.CurrentUser;
RegistryKey software = hkcu.OpenSubKey("SOFTWARE");
RegistryKey gstar = software.OpenSubKey("123");
RegistryKey soft = gstar.OpenSubKey(p);
string[] middle = soft.GetSubKeyNames();
for (int i = 0; i <= middle.Length; i++)
{
d.version[i] = int.Parse(middle[i]);
}
for (int i = 0; i <= soft.SubKeyCount; i++)
{
RegistryKey zhcn = soft.OpenSubKey("zh_CN");
d.pathh[i] = zhcn.GetValue("location").ToString();
}
soft.Close();
gstar.Close();
software.Close();
hkcu.Close();
return d;
}
调试时在“d.version[i] = int.Parse(middle[i]);”处报错，提示“Object reference not set to an instance of an object.”
查了报错信息，说是因为没有实例化，可是我middle还有d都实例化了呀？

d 里面的 version 没有实例化

数组是引用类型，默认是个null，你这里要用的话需要自己初始化的。

好吧，可我的不定数组在定义的时候是不确定数组长度的……

public struct data
{
public int[] version;
public string[] pathh;
}
private data GetPath(string p)
{
data d = new data();
RegistryKey hkcu = Registry.CurrentUser;
RegistryKey software = hkcu.OpenSubKey("SOFTWARE");
RegistryKey gstar = software.OpenSubKey("123");
RegistryKey soft = gstar.OpenSubKey(p);
string[] middle = soft.GetSubKeyNames();
d.version = new int[middle.Length]; // 初始化 version 数组
d.pathh = new string[soft.SubKeyCount]; // 初始化 pathh 数组
for (int i = 0; i < middle.Length; i++)
{
d.version[i] = int.Parse(middle[i]);
}
for (int i = 0; i < soft.SubKeyCount; i++)
{
RegistryKey zhcn = soft.OpenSubKey("zh_CN");
d.pathh[i] = zhcn.GetValue("location").ToString();
}
soft.Close();
gstar.Close();
software.Close();
hkcu.Close();
return d;
}