C#：引用 Windows shell 接口

发布于 2024-08-15 10:46:12 字数 650 浏览 8 评论 0原文

我对 C# 还很陌生，我正在尝试完成一个我一直在从事的小项目，该项目使用少量 C# 代码来协助开发 Windows 桌面小工具。基本上，我正在尝试实现 IDesktopGadget 接口，以便我可以使用 RunGadget 方法。

以下是到目前为止我从阅读有关类似接口的信息中得到的信息：

[ComImport]
[Guid("C1646BC4-F298-4F91-A204-EB2DD1709D1A")]
[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
interface IDesktopGadget
{
    uint RunGadget([MarshalAs(UnmanagedType.LPWStr)] string gadgetPath);
}

不幸的是，当我尝试从中创建对象时出现错误：“无法创建抽象类或接口'GadgetTask.IDesktopGadget'的实例”< /code>

有人能指出我正确的方向，同时帮助我理解我做错了什么吗？

原文

I'm pretty new to C#, I'm trying to complete a little side project I've been working on that uses a small amount of C# code to assist the development of a Windows Desktop Gadget. Basically, I'm trying to implement the IDesktopGadget interface so that I can use the RunGadget method.

Here's what I got so far from reading information about similar interfaces:

[ComImport]
[Guid("C1646BC4-F298-4F91-A204-EB2DD1709D1A")]
[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
interface IDesktopGadget
{
    uint RunGadget([MarshalAs(UnmanagedType.LPWStr)] string gadgetPath);
}

Unfortunately, I get an error when I try and create an object from it: "Cannot create an instance of the abstract class or interface 'GadgetTask.IDesktopGadget'"

Can someone point me in the right direction and maybe help me understand what I'm doing wrong at the same time?

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身边 2024-08-22 10:46:12

实际上，您需要 DesktopGadget 对象的实现才能使用该界面。 MS 提供了一个标准 COM 对象来在 Windows 7 上执行此操作。您可以通过执行以下操作来创建实例：

Type t = Type.GetTypeFromCLSID(new Guid("924ccc1b-6562-4c85-8657-d177925222b6"));
IDesktopGadget dg = (IDesktopGadget)Activator.CreateInstance(t);

You actually need an implementation of the DesktopGadget object in order to use the interface. MS provide a standard COM object to do it on Windows 7. You can create an instance by doing something like:

Type t = Type.GetTypeFromCLSID(new Guid("924ccc1b-6562-4c85-8657-d177925222b6"));
IDesktopGadget dg = (IDesktopGadget)Activator.CreateInstance(t);

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困倦 2024-08-22 10:46:12

感谢您的指导。对于更直接的帮助，这对我有用：

IDesktopGadget.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;

namespace GadgetActivator
{
    [ComImport]
    [Guid("C1646BC4-F298-4F91-A204-EB2DD1709D1A")]
    [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]

    interface IDesktopGadget
    {
        uint RunGadget([MarshalAs(UnmanagedType.LPWStr)] string gadgetPath);
    }
}

Program.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;


namespace GadgetActivator
{
    class Program
    {
        static void Main(string[] args)
        {
            Type t = Type.GetTypeFromCLSID(new Guid("924ccc1b-6562-4c85-8657-d177925222b6"));
            IDesktopGadget dg = (IDesktopGadget)Activator.CreateInstance(t);
            dg.RunGadget(@"C:\Program Files\Windows Sidebar\Gadgets\xxxxxxxxx.Gadget");
        }
   }
}

Thanks for the guidance. For a little more straight forward help, this is what worked for me:

IDesktopGadget.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;

namespace GadgetActivator
{
    [ComImport]
    [Guid("C1646BC4-F298-4F91-A204-EB2DD1709D1A")]
    [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]

    interface IDesktopGadget
    {
        uint RunGadget([MarshalAs(UnmanagedType.LPWStr)] string gadgetPath);
    }
}

Program.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;


namespace GadgetActivator
{
    class Program
    {
        static void Main(string[] args)
        {
            Type t = Type.GetTypeFromCLSID(new Guid("924ccc1b-6562-4c85-8657-d177925222b6"));
            IDesktopGadget dg = (IDesktopGadget)Activator.CreateInstance(t);
            dg.RunGadget(@"C:\Program Files\Windows Sidebar\Gadgets\xxxxxxxxx.Gadget");
        }
   }
}

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