Upload multiple image in multiple size with progress bar in asp.net

In asp.net there is not control to select multiple files and upload them once with progress bar, so we will use a small third party DLL to achieve this functionality. We will use Flajaxian FileUploader, you can download it from http://www.flajaxian.com

We will create three different images of size 100X100, 400X400 and original file, you can say thumbnail, medium size image and original image.

After downloading it extract the file and reference com.flajaxian.FileUploader.dll in your application.

Register it on your page or in web.config file

// On Page
<%@ Register TagPrefix="fjx" Namespace="com.flajaxian" 
   Assembly="com.flajaxian.FileUploader" %>

// In web.config file
<add tagPrefix="fjx" namespace="com.flajaxian" 
   assembly="com.flajaxian.FileUploader" />

We set all the required things and time to use this control on page, so add following to the page

<fjx:FileUploader ID="FileUploader1" runat="server" 
    TransparentBackground="true" 
    UseInsideUpdatePanel="true"
    AllowedFileTypes="Web Images :*.jpg;*.jpeg;*.png;*.gif"
    OnFileReceived="Uploaded_FileReceived"
    MaxFileSize="15MB" 
    MaxFileSizeReachedMessage="Sorry, file size is greater than 15 MB!"> 
</fjx:FileUploader>

As you can see here we are using different properties like

UseInsideUpdatePanel: if you want to use inside update panel then true otherwise false or omit it.

AllowedFileTypes: we can define the file types which we can accept

OnFileReceived: define a code behind method to track the uploaded file and then make entries into database, I am using then because I am saving all the files into folder then maintaining the path into a table (we will see this method latter)

Rest are self explanatory, so time to write code behind method to save the file path in database.

protected void Uploaded_FileReceived(object sender, 
                         com.flajaxian.FileReceivedEventArgs e)
{
   String ThumbPath = String.Empty; 
   String MediumPath = String.Empty;
   String OriginalPath = String.Empty;  

  // Create a file name from date time
   String FileName = String.Format("{0:yyyy}{0:MM}{0:dd}{0:HH}{0:mm}{0:ss}{0:fff}", DateTime.Now);

  using (System.Drawing.Image Img = System.Drawing.Image.FromStream(e.File.InputStream))
  {
    // Get file extension
    String fileExt = System.IO.Path.GetExtension(e.File.FileName).ToLower();

    ThumbPath  = String.Format("Images/{0}_thumb/{1}", FileName, fileExt);
    MediumPath = String.Format("Images/{0}_medium/{1}", FileName, fileExt);
    OriginalPath = String.Format("Images/{0}_original/{1}", FileName, fileExt);

    // Get thumb resolution
    Size ThumbNailSize100 = NewImageSize(Img.Height, Img.Width, 100, 100);
    using (System.Drawing.Image ImgThnail = new Bitmap(Img, ThumbNailSize100.Width, ThumbNailSize100.Height))
    {
        ImgThnail.Save(ThumbPath, Img.RawFormat);
    }

    Size ThumbNailSize400 = NewImageSize(Img.Height, Img.Width, 400, 400);
    using (System.Drawing.Image ImgThnail = new Bitmap(Img, ThumbNailSize400.Width, ThumbNailSize400.Height))
    {
      ImgThnail.Save(MediumPath, Img.RawFormat);
    }
    // Save original image, no need to calculate the size
    Img.Save(OriginalPath, Img.RawFormat);
  }
  // TODO:: Create method to save the records into database and call it here
  //SaveToDatabase(ThumbPath, MediumPath, OriginalPath);

Method to calculate the width and height of image for 100X100 and 400X400

#region[Resize the image]
public Size NewImageSize(int OriginalHeight, int OriginalWidth, 
        double thumbWidth, double thumbHeight)
{
    Size NewSize;
    double tempval;
    if (OriginalHeight > thumbHeight || OriginalWidth > thumbWidth)
    {
        if (OriginalHeight > OriginalWidth)
            tempval = thumbHeight / Convert.ToDouble(OriginalHeight);
        else
            tempval = thumbWidth / Convert.ToDouble(OriginalWidth);

        NewSize = new Size(Convert.ToInt32(tempval * OriginalWidth), 
         Convert.ToInt32(tempval * OriginalHeight));
    }
    else
        NewSize = new Size(OriginalWidth, OriginalHeight); return NewSize;
}
#endregion

Once you will download the DLL, it will have CSS as well so use them

Output:

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