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解決了下面的第一個問題，但我仍然需要能夠重新調整大小/重新縮放我的代碼在將物理文件保存到服務器時所用的圖像。現在它已被 存儲在數據庫中它不起作用..重新調整大小並將圖像保存到數據庫中
我在我的代碼中看到我沒有通過重新縮放圖像到InputStream中，我通過原始文件基地..有可能以某種方式傳遞newImage作爲其不同類型的..
我真的有麻煩從數據庫中存儲/檢索圖像。最初，我有允許上傳圖像的代碼，調整到所需的尺寸並將其存儲爲物理文件。但現在我需要將圖像保存到數據庫（MS SQL）。
我使用MVC2 .NET 3.5
我的代碼是有點不同的圖像的跨界混搭上傳所以裸跟我:)
下面是上傳控制器：
[HttpPost]
public ActionResult ImageUpload(HttpPostedFileBase fileBase, PhotoViewModel photoViewModel)
{
if (photoViewModel.Button == "Upload")
{
photoViewModel.ImageValid = "Valid";
ImageService imageService = new ImageService();
if (fileBase != null && fileBase.ContentLength > 0 && fileBase.ContentLength <= 2097152 && fileBase.ContentType.Contains("image/"))
{
Path.GetExtension(fileBase.ContentType);
var extension = Path.GetExtension(fileBase.FileName);
if (extension.ToLower() != ".jpg" && extension.ToLower() != ".gif") // only allow these types
{
photoViewModel.ImageValid = "Not Valid";
ModelState.AddModelError("Photo", "Wrong Image Type");
return View(photoViewModel);
}
EncoderParameters encodingParameters = new EncoderParameters(1);
encodingParameters.Param[0] = new EncoderParameter(Encoder.Quality, 100L); // Set the JPG Quality percentage
ImageCodecInfo jpgEncoder = imageService.GetEncoderInfo("image/jpeg");
var uploadedimage = Image.FromStream(fileBase.InputStream, true, true);
Bitmap originalImage = new Bitmap(uploadedimage);
Bitmap newImage = new Bitmap(originalImage, 274, 354);
Graphics g = Graphics.FromImage(newImage);
g.InterpolationMode = InterpolationMode.HighQualityBilinear;
g.DrawImage(originalImage, 0, 0, newImage.Width, newImage.Height);
var streamLarge = new MemoryStream();
newImage.Save(streamLarge, jpgEncoder, encodingParameters);
var fileExtension = Path.GetExtension(extension);
string newname;
if (photoViewModel.photoURL != null)
{
newname = photoViewModel.photoURL;
}
else
{
newname = Guid.NewGuid() + fileExtension;
}
//changed this up now, so it stores the image in db as apposed to physical path
photoViewModel.photo = newname;
photoViewModel.ContentType = fileBase.ContentType;
Int32 length = fileBase.ContentLength;
byte[] tempImage = new byte[length];
fileBase.InputStream.Read(tempImage, 0, length);
photoViewModel.ImageData = tempImage;
TempImageUpload tempImageUpload = new TempImageUpload();
tempImageUpload.TempImageData = tempImage;
tempImageUpload.ContentType = photoViewModel.ContentType;
photoViewModel.TempImageId = _service.InsertImageDataBlob(tempImageUpload);
originalImage.Dispose();
streamLarge.Dispose();
return View(photoViewModel);
}
if (fileBase != null)
{
if (fileBase.ContentLength > 0) ModelState.AddModelError("Photo", "Image size too small");
if (fileBase.ContentLength <= 2097152) ModelState.AddModelError("Photo", "Image size too big");
if (fileBase.ContentType.Contains("image/")) ModelState.AddModelError("Photo", "Wrong Image Type");
}
else ModelState.AddModelError("Photo", "Please upload a image");
if (!ModelState.IsValid)
{
photoViewModel.ImageValid = "Not Valid";
return View(photoViewModel);
}
}
return View(photoViewModel);
}
這裏是我的倉庫類：
public int InsertImageDataBlob(TempImageUpload tempImageUpload)
{
int ReturnedPhotoId;
try
{
var phototempdata = new Photo
{
ImageData = tempImageUpload.TempImageData,
contentType = tempImageUpload.ContentType,
dateUploaded = DateTime.Now
};
_db.Photos.InsertOnSubmit(phototempdata);
Save();
ReturnedPhotoId = phototempdata.id;
return ReturnedPhotoId;
}
catch (Exception ex)
{
//ErrorLogging;
}
return 0;
}
和圖像數據數據庫中的字段（圖像類型）將填充數據。
任何援助將不勝感激，我正在逐漸變灰！
感謝
通過這個http://stackoverflow.com/questions/880515/display-image-from-database-in-asp-mvc – maztt
去嘗試把'fileBase .InputStream.Seek（0，SeekOrigin.Begin）;'b efore'fileBase.InputStream.Read（tempImage，0，length）;'語句？ –
您正在從同一個流中讀取兩次，可能在DB中存儲空字節。 –