参考链接 https://stackoverflow.com/questions/6773866/download-file-and-automatically-save-it-to-folder
public class MyWebBrowser : WebBrowser { /// <summary> /// The URLMON library contains this function, URLDownloadToFile, which is a way /// to download files without user prompts. The ExecWB( _SAVEAS ) function always /// prompts the user, even if _DONTPROMPTUSER parameter is specified, for "internet ///