WPF 判断当前应用被打包为 UWP 而运行

本文告诉大家如何在应用运行过程判断自己的 WPF 应用被转制为 UWP 应用运行

通过 kernel32 的 GetCurrentPackageFullName 方法即可判断，此方法要求是在 Win10 或以上版本才能使用哦。当然了，如果在 Win10 以下的版本，如 Win7 那默认就跑不了 UWP 应用，也就不需要判断了

判断代码如下

        const long APPMODEL_ERROR_NO_PACKAGE = 15700L;

        [DllImport("kernel32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
        static extern int GetCurrentPackageFullName(ref int packageFullNameLength, StringBuilder packageFullName);

        public bool IsRunningAsUwp()
        {
                int length = 0;
                StringBuilder sb = new StringBuilder(0);
                int result = GetCurrentPackageFullName(ref length, sb);

                sb = new StringBuilder(length);
                result = GetCurrentPackageFullName(ref length, sb);

                return result != APPMODEL_ERROR_NO_PACKAGE;
        }

在开始判断之前，先判断系统版本，代码如下

        public bool IsRunningAsUwp()
        {
            if (IsWindows7OrLower)
            {
                return false;
            }
            else
            {
                int length = 0;
                StringBuilder sb = new StringBuilder(0);
                int result = GetCurrentPackageFullName(ref length, sb);

                sb = new StringBuilder(length);
                result = GetCurrentPackageFullName(ref length, sb);

                return result != APPMODEL_ERROR_NO_PACKAGE;
            }
        }

        private bool IsWindows7OrLower
        {
            get
            {
                int versionMajor = Environment.OSVersion.Version.Major;
                int versionMinor = Environment.OSVersion.Version.Minor;
                double version = versionMajor + (double)versionMinor / 10;
                return version <= 6.1;
            }
        }