Now I can get all device information use mip sdk like username,password… But I don’t know which device belong to our manufacturer. And I need to control the device that belong to our manufacturer
Assuming you are using the Configuration API since you have access to the user name and password in a component integration?
In any case that would be the best way to go as you in there also have access to the driver being used by the hardware.
Try have a look at the ConfigurationItems.Hardware class (http://doc.developer.milestonesys.com/html/index.html?base=miphelp/class_video_o_s_1_1_platform_1_1_configuration_items_1_1_hardware.html&tree=tree_search.html?search=configurationitems). There you will find a property named HardwareDriverPath, which allows you to look up the driver being used for that particular piece of hardware. You can then either use that path to create the corresponding ConfigurationItems.HardwareDriver object in which you will be able to read information about the hardware vendor, or you can simply look at the GUID contained in the HardwareDriverPath and compare it to the one(s) that corresponds to the driver(s) made for your company.