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In asp mvc ,I add text to the image and return MemoryStream,download file show unknown file format

.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty height:90px;width:728px;box-sizing:border-box;

0

In asp mvc,I added the text to the image and then returned the MemoryStream ,
but when I opened the downloaded image, the file show unknown file format,image size only 1.33kb.

if I use Image.Save(filePath) ,it work well.

public ActionResult ReturnImage()

 Image img = Image.FromFile("image.jpg");
 string firstText = "Hello";
 string secondText = "World";

 PointF firstLocation = new PointF(10f, 10f);
 PointF secondLocation = new PointF(10f, 50f);

 using (MemoryStream ms = new MemoryStream())
 using (Graphics graphics = Graphics.FromImage(img))
 using (Font arialFont = new Font("Arial", 10))
 
 graphics.DrawString(firstText, arialFont, Brushes.Blue, firstLocation);
 graphics.DrawString(secondText, arialFont, Brushes.Red, secondLocation);
 img.Save(ms, ImageFormat.Jpeg);
 //img.Save(@"C:UsersAdministratorDesktop07.jpg");
 ms.Position = 0;
 return File(ms, "APPLICATION/OCTET-STREAM");
 

[enter image description here][1]

asp.net-mvc-4

share|improve this question

asked Mar 22 at 3:58

doneselfdoneself

11

add a comment | 

0

In asp mvc,I added the text to the image and then returned the MemoryStream ,
but when I opened the downloaded image, the file show unknown file format,image size only 1.33kb.

if I use Image.Save(filePath) ,it work well.

public ActionResult ReturnImage()

 Image img = Image.FromFile("image.jpg");
 string firstText = "Hello";
 string secondText = "World";

 PointF firstLocation = new PointF(10f, 10f);
 PointF secondLocation = new PointF(10f, 50f);

 using (MemoryStream ms = new MemoryStream())
 using (Graphics graphics = Graphics.FromImage(img))
 using (Font arialFont = new Font("Arial", 10))
 
 graphics.DrawString(firstText, arialFont, Brushes.Blue, firstLocation);
 graphics.DrawString(secondText, arialFont, Brushes.Red, secondLocation);
 img.Save(ms, ImageFormat.Jpeg);
 //img.Save(@"C:UsersAdministratorDesktop07.jpg");
 ms.Position = 0;
 return File(ms, "APPLICATION/OCTET-STREAM");
 

[enter image description here][1]

asp.net-mvc-4

share|improve this question

asked Mar 22 at 3:58

doneselfdoneself

11

add a comment | 

In asp mvc,I added the text to the image and then returned the MemoryStream ,
but when I opened the downloaded image, the file show unknown file format,image size only 1.33kb.

if I use Image.Save(filePath) ,it work well.

public ActionResult ReturnImage()

 Image img = Image.FromFile("image.jpg");
 string firstText = "Hello";
 string secondText = "World";

 PointF firstLocation = new PointF(10f, 10f);
 PointF secondLocation = new PointF(10f, 50f);

 using (MemoryStream ms = new MemoryStream())
 using (Graphics graphics = Graphics.FromImage(img))
 using (Font arialFont = new Font("Arial", 10))
 
 graphics.DrawString(firstText, arialFont, Brushes.Blue, firstLocation);
 graphics.DrawString(secondText, arialFont, Brushes.Red, secondLocation);
 img.Save(ms, ImageFormat.Jpeg);
 //img.Save(@"C:UsersAdministratorDesktop07.jpg");
 ms.Position = 0;
 return File(ms, "APPLICATION/OCTET-STREAM");
 

[enter image description here][1]

asp.net-mvc-4

share|improve this question

asked Mar 22 at 3:58

doneselfdoneself

11

public ActionResult ReturnImage()

 Image img = Image.FromFile("image.jpg");
 string firstText = "Hello";
 string secondText = "World";

 PointF firstLocation = new PointF(10f, 10f);
 PointF secondLocation = new PointF(10f, 50f);

 using (MemoryStream ms = new MemoryStream())
 using (Graphics graphics = Graphics.FromImage(img))
 using (Font arialFont = new Font("Arial", 10))
 
 graphics.DrawString(firstText, arialFont, Brushes.Blue, firstLocation);
 graphics.DrawString(secondText, arialFont, Brushes.Red, secondLocation);
 img.Save(ms, ImageFormat.Jpeg);
 //img.Save(@"C:UsersAdministratorDesktop07.jpg");
 ms.Position = 0;
 return File(ms, "APPLICATION/OCTET-STREAM");
 

[enter image description here][1]

share|improve this question

asked Mar 22 at 3:58

doneselfdoneself

11

share|improve this question

asked Mar 22 at 3:58

doneselfdoneself

11

asked Mar 22 at 3:58

doneselfdoneself

11

asked Mar 22 at 3:58

doneselfdoneself

11