是否可以将单个System.Web.HttpPostedFileBase图像（任何类型）转换为位图对象？

Question

OK, so as the title suggests, I am attempting to convert a single System.Web.HttpPostedFileBase posted image (any type) to a bitmap object. I basically need to do this in order to close the object after I save the file.

Here is my code so far:

var PortraitImage = Request.Files["PortraitImageSelector"];
string FileName = Guid.NewGuid().ToString() + Path.GetExtension(PortraitImage.FileName);
string PortraitImageFullLocation = Path.Combine(Server.MapPath(_VirtualPath), FileName);
string PortraitImageURL = string.Format("{0}/{1}", _VirtualPath, FileName);

using (var bmp = new Bitmap(PortraitImageFullLocation))
{
    bmp.Save(PortraitImageFullLocation);
}

Unfortunately, when I run this I get an exception stating the following:

{"Parameter is not valid."}
    Data: {System.Collections.ListDictionaryInternal}
    HResult: -2147024809
    HelpLink: null
    InnerException: null
    Message: "Parameter is not valid."
    ParamName: null
    Source: "System.Drawing"
    StackTrace: "   at System.Drawing.Bitmap..ctor(String filename)\r\n   at johneschultz.Areas.Admin.Controllers.EmployeeController.Edit(EmployeeViewModel EmployeeData) in Z:\\_Profile Storage\\Projects\\johneschultz\\johneschultz\\Areas\\Admin\\Controllers\\EmployeeController.cs:line 552"
    TargetSite: {Void .ctor(System.String)}

Answer 1

To save the HttpPostedFileBase as a BitMap , simply use the InputStream because BitMap has a constructor which takes a Stream :

using (System.Drawing.Bitmap bmp = new System.Drawing.Bitmap(this.Request.Files[0].InputStream))
{
    bmp.Save("whatever.bmp", System.Drawing.Imaging.ImageFormat.Bmp);
}