c#中portabledeviceapi怎么使用

在C#中使用PortableDeviceAPI可以通过以下步骤进行：

添加对PortableDeviceApiLib库的引用。可以通过右键点击项目，选择“添加引用”，然后在COM选项卡中找到“PortableDeviceApiLib”并添加。

在代码中创建PortableDeviceManager对象，并使用其方法连接到设备。例如：

PortableDeviceManager deviceManager = new PortableDeviceManager();deviceManager.RefreshDeviceList();// 获取设备列表string[] deviceIds = new string[1];uint count = 1;deviceManager.GetDevices(deviceIds, ref count);// 连接到设备PortableDevice device = new PortableDevice();device.Open(deviceIds[0]);

使用PortableDevice对象进行操作，如获取设备信息、列举文件、上传和下载文件等。例如：

// 获取设备名称string deviceName;device.GetDeviceFriendlyName(out deviceName);// 列举设备中的文件IPortableDeviceContent content;device.Content(out content);IPortableDeviceProperties properties;content.Properties(out properties);IPortableDevicePropVariantCollection objectIds = new PortableDeviceTypesLib.PortableDevicePropVariantCollection() as IPortableDevicePropVariantCollection;content.EnumObjects(0, deviceIds[0], null, out objectIds);uint numObjects;objectIds.GetCount(out numObjects);for (uint i = 0; i < numObjects; i++){var propertyValue = new PortableDeviceApiLib._tagpropertykey();objectIds.GetAt(i, out propertyValue);IPortableDeviceProperties currentProperties;content.Properties(out currentProperties);PortableDeviceApiLib.IPortableDeviceValues values;currentProperties.GetValues(propertyValue.ToString(), null, out values);// 获取文件名string fileName;values.GetStringValue(ref PortableDevicePKeys.WPD_OBJECT_NAME, out fileName);Console.WriteLine("文件名：" + fileName);}// 上传文件到设备PortableDeviceApiLib.IPortableDeviceContent2 content2 = device as PortableDeviceApiLib.IPortableDeviceContent2;PortableDeviceApiLib.IStream wpdStream;content2.CreateObjectWithPropertiesAndData(PortableDevicePKeys.WPD_OBJECT_FORMAT_UNSPECIFIED,"test.jpg",null,out wpdStream,0);FileStream fileStream = new FileStream("test.jpg", FileMode.Open, FileAccess.Read);byte[] buffer = new byte[4096];int bytesRead;do{bytesRead = fileStream.Read(buffer, 0, buffer.Length);IntPtr pcbWritten = IntPtr.Zero;wpdStream.Write(buffer, (uint)bytesRead, pcbWritten);} while (bytesRead > 0);wpdStream.Commit(0);Marshal.ReleaseComObject(wpdStream);

以上是PortableDeviceAPI的基本用法，你可以根据自己的需求进行扩展和修改。