我有这个代码,我用来读取上传的文件,但我需要获取图像的大小,但不知道我可以使用什么代码
HttpFileCollection collection = _context.Request.Files;
for (int i = 0; i < collection.Count; i++)
{
HttpPostedFile postedFile = collection[i];
Stream fileStream = postedFile.InputStream;
fileStream.Position = 0;
byte[] fileContents = new byte[postedFile.ContentLength];
fileStream.Read(fileContents, 0, postedFile.ContentLength);
我可以正确地获取文件但是如何检查它的图像(宽度和大小)先生?
答案 0 :(得分:36)
首先你必须写下图像:
System.Drawing.Image image = System.Drawing.Image.FromStream (new System.IO.MemoryStream(byteArrayHere));
然后你有了:
image.Height.ToString();
和
image.Width.ToString();
注意:您可能需要添加一项检查,以确保它是上传的图片?
答案 1 :(得分:4)
HttpPostedFile file = null;
file = Request.Files[0]
if (file != null && file.ContentLength > 0)
{
System.IO.Stream fileStream = file.InputStream;
fileStream.Position = 0;
byte[] fileContents = new byte[file.ContentLength];
fileStream.Read(fileContents, 0, file.ContentLength);
System.Drawing.Image image = System.Drawing.Image.FromStream(new System.IO.MemoryStream(fileContents));
image.Height.ToString();
}