[MarmiteX1]

Hi,

I am developing a Zoo Database System and I have developed functionality to allow a user to write the title to an image and I can apply this to multiple images but i want to do in an efficient way.

Currently i write the title to multiple images by allowing the user to specify a directory in a textbox, creating the image objects and then outputing each image to chosen directory but I want to update the images property info where they're currently located.

So say i have 10 images in C:\SomeFolder\, if i select Save button on my form,the property information of the images that are located at in that folder should be updated.

I can save a single image to a chosen location by using a SaveFileDialog control with the following code:

private void saveJpeg(string path, Bitmap img, long quality)
{
   // Encoder parameter for image quality
   EncoderParameter qualityParam = new EncoderParameter(Encoder.Quality, quality);

   // Jpeg image codec
   ImageCodecInfo jpegCodec = this.getEncoderInfo("image/jpeg");

   if(jpegCodec == null)
      return;

   EncoderParameters encoderParams = new EncoderParameters(1);
   encoderParams.Param[0] = qualityParam;

   img.Save(path, jpegCodec, encoderParams);
}

private ImageCodecInfo getEncoderInfo(string mimeType)
{
   // Get image codecs for all image formats
   ImageCodecInfo[] codecs = ImageCodecInfo.GetImageEncoders();

   //Loop through codec to get correct one
   for (int i = 0; i < codecs.Length; i++)
      if (codecs[i].MimeType == mimeType)
         return codecs[i];
   return null;
}

I would appreciate if somebody could advise please on the above.

Thanks

This post has been edited by MarmiteX1: 05 March 2010 - 12:30 PM

[MarmiteX1]

*Update*

I dont know whether i should post it here or in a seperate post but anyway here i go:

I have had a go at it and does work to an extent but a problem occurs when you try to "save"/ write the images back to the folder they were originally located in.

The message i get is the following:

Quote

A generic error occured in GDI+
A first chance exception of type 'System.Runtime.InteropServices.ExternalException' occurred in System.Drawing.dll
System.Drawing
A first chance exception of type 'System.Runtime.InteropServices.ExternalException' occurred in System.Drawing.dll
System.Drawing

Error code: -2147467259

" at System.Drawing.Image.Save(String filename, ImageCodecInfo encoder, EncoderParameters encoderParams)\r\n
at System.Drawing.Image.Save(String filename, ImageFormat format)\r\n at ZooSystem.ImageViewer.ApplyChanges()
in E:\\ZooSystem\\\ImageViewer.cs:line 520"

I have checked the permissions for each of the images in the folder and they all have FullControl/Read/Write/Modify permissions enabled but the folder has "Read-Only" enabled.

The folder was created on the Internal Hard drive of the computer and I am using Windows Vista Home Premium 32-bit. I am using MS VS 2008 Pro edition which i run in Admin mode.

If i save the images to another folder say one of the Public folders then the above exception is not thrown.

But I would like to save my images to the same folder if possible?

How could i go about doing this? I would appreciate if somebody could help me with the above. I have been trying to fix it for past 2 hours.

Here is the code:

private void ApplyChanges()
{
//check if the destination folder in the textbox is blank in order to save a single image
//using the Save-file dialog feature.
if(txtBoxOut.Text.Equals("")
{
  //here i write the title to the global image by calling a write method

  //show the save file dialog and check if result is OK.
   //call the custom save method 
    if(sfd.ShowDialog()==DialogResult.OK)
    {
        
       this.SaveTheImage(sfd.FileName,this.bmp);
    }
  
}
else if(txtBoxOut.Text != "")
{

   string destFolder = txtBoxOut.text
   foreach(string filePath in filePaths)
   {
      this.bmp = Image.FromFile(filePath);
      string fileName = Path.GetFileName(filePath);
      
     try 
     {

       //write the title to the global image

       //check folder
      if(destFolder.EndsWith("\\")
      {
        //use the inbuilt save method
        this.bmp.Save(destFolder+fileName+ImageFormat.Jpeg);
      }
      else
      {
        this.bmp.Save(destFolder+"\\"+fileName+ImageFormat.Jpeg);
        
      }

     }
     catch(Exception ex)
     {

        Console.WriteLine(ex.message.ToString());
     }

   }
 }
}

[MarmiteX1]

Hi,

Apologies for the double posting but i just thought it may be best to post this as a seperate thread.

I recently posted a thread about writing a title to more than image at the same time.

Now i have had a go at it and does work to an extent but a problem occurs when you try to "save"/ write the images back to the folder they were originally located in.

The message i get is the following:

Quote

A generic error occured in GDI+
A first chance exception of type 'System.Runtime.InteropServices.ExternalException' occurred in System.Drawing.dll
System.Drawing
A first chance exception of type 'System.Runtime.InteropServices.ExternalException' occurred in System.Drawing.dll
System.Drawing

Error code: -2147467259

" at System.Drawing.Image.Save(String filename, ImageCodecInfo encoder, EncoderParameters encoderParams)\r\n
at System.Drawing.Image.Save(String filename, ImageFormat format)\r\n at ZooSystem.ImageViewer.ApplyChanges()
in E:\\ZooSystem\\\ImageViewer.cs:line 520"

I have checked the permissions for each of the images in the folder and they all have FullControl/Read/Write/Modify permissions enabled but the folder has "Read-Only" enabled.

The folder was created on the Internal Hard drive of the computer and I am using Windows Vista Home Premium 32-bit. I am using MS VS 2008 Pro edition which i run in Admin mode.

If i save the images to another folder say one of the Public folders then the above exception is not thrown.

But I would like to save my images to the same folder if possible?

How could i go about doing this? I would appreciate if somebody could help me with the above. I have been trying to fix it for past 2 hours.

Thanks,

Here is the code:

private void ApplyChanges()
{
//check if the destination folder in the textbox is blank in order to save a single image
//using the Save-file dialog feature.
if(txtBoxOut.Text.Equals("")
{
  //write the title to the global image by calling appropriate method

  //show the save file dialog and check if result is OK.
   //call the custom save method 
    if(sfd.ShowDialog()==DialogResult.OK)
    {
        
       this.SaveTheImage(sfd.FileName,this.bmp);
    }
  
}
else if(txtBoxOut.Text != "")
{

   string destFolder = txtBoxOut.text
   foreach(string filePath in filePaths)
   {
      this.bmp = Image.FromFile(filePath);
      string fileName = Path.GetFileName(filePath);
      
     try 
     {

       //write the title to the global image

       //check folder
      if(destFolder.EndsWith("\\")
      {
        //use the inbuilt save method
        this.bmp.Save(destFolder+fileName+ImageFormat.Jpeg);
      }
      else
      {
        this.bmp.Save(destFolder+"\\"+fileName+ImageFormat.Jpeg);
        
      }

     }
     catch(Exception ex)
     {

        Console.WriteLine(ex.message.ToString());
     }

   }
 }
}

[Searock]

That's weird.

Can you tell me the full path of the folder.

Try to delete it and then try to create the same folder again

[MarmiteX1]

Searock, on 05 March 2010 - 06:31 PM, said:

That's weird.

Can you tell me the full path of the folder.

Try to delete it and then try to create the same folder again

The full path is the following:

C:\Users\<username>\Pictures\Animals

I deleted the folder and made a new folder but the problem still persists.

I am still investigating the problem.

[Ferencn]

Where exactly are the files located on your system?
Still sounds like lack of permission to me, especially since you can save them to another folder without problems.