Develop Reference

How to load a System.Drawing.Bitmap object from an embedded Uri resource (png image)?

My .png image is stored on a Uri object and it has the following format
"pack://application:,,,/AppName.Modules.App.Shared;component/Images/AppName_logo.png"
How do I load this image onto a System.Drawing.Bitmap object?

Assuming you are using WPF, you can first load the image as a BitmapImage and then convert it.
See this answer to "Converting BitmapImage to Bitmap and vice versa"
BitmapImage bi = new BitmapImage(
new Uri("pack://application:,,,/AppName.Modules.App.Shared;component/Images/AppName_logo.png"));
Bitmap b = BitmapImage2Bitmap(bi);
private Bitmap BitmapImage2Bitmap(BitmapImage bitmapImage)
{
using (MemoryStream outStream = new MemoryStream())
{
BitmapEncoder enc = new BmpBitmapEncoder();
enc.Frames.Add(BitmapFrame.Create(bitmapImage));
enc.Save(outStream);
System.Drawing.Bitmap bitmap = new System.Drawing.Bitmap(outStream);
return new Bitmap(bitmap);
}
}

Converting FileStream to WriteableBitmap to JPEG to Byte Array for SSRS

I'm trying to save an Image to SQL Server so SSRS can read it. I need to convert to WriteableBitmap (and possibly JPEG?) so I can make changes to the image size before saving. However, when I try to pull the converted image out of SQL Server, it will not render in SSRS at all. What am I doing wrong?
byte[] m_Bytes = ReadToEnd(fileStream); //this works fine
WriteableBitmap bmp1 = new WriteableBitmap(166, 166);
bmp1.FromByteArray(m_Bytes); //this works fine
ExtendedImage image = bmp1.ToImage();
MemoryStream stream = new MemoryStream();
ImageTools.IO.Encoders.AddEncoder<JpegEncoder>();
JpegEncoder encoder = new JpegEncoder();
encoder.Encode(image, stream);
BitmapImage img = new BitmapImage();
img.SetSource(stream);
WriteableBitmap bmp2 = new WriteableBitmap(img);
byte[] buffer1 = bmp2.ToByteArray();
CurrentOrder.CompanyImage = buffer1; //this does save a byte array but it will not render in SSRS. If I set buffer1 to bmp1.ToByteArray() then it works fine but I am still unable to resize it using the resize method in WriteableEx without it not rendering in SSRS.
This is another try at the same thing and it won't render either:
And this is simpler and won't work either:
byte[] m_Bytes = ReadToEnd(fileStream);
WriteableBitmap bmp1 = new WriteableBitmap(166, 166);
bmp1.FromByteArray(m_Bytes);
WriteableBitmap resizedImage = bmp1.Resize(25, 25, WriteableBitmapExtensions.Interpolation.Bilinear);
byte[] buffer1 = resizedImage.ToByteArray();
CurrentOrder.CompanyImage = buffer1;

What you want is to resize 166x166 (or 25x25), export as byte[] and reload picture from this byte array ?
Can you try with BitmapImage ?
BitmapImage image = new BitmapImage();
image.SetSource(fileStream);
WriteableBitmap bitmap = new WriteableBitmap(image);
WriteableBitmap resizedBitmap = bitmap.Resize(25, 25, WriteableBitmapExtensions.Interpolation.Bilinear);
CurrentOrder.CompanyImage = resizedBitmap.ToByteArray();

Convert base64 string to image in C# on Windows Phone

I have a base64 string and I want convert that to an image and set the Source of an Image control to the result of that.
Normally I would do that using Image.FromStream, similar to this:
Image img;
byte[] fileBytes = Convert.FromBase64String(imageString);
using(MemoryStream ms = new MemoryStream())
{
ms.Write(fileBytes, 0, fileBytes.Length);
img = Image.FromStream(ms);
}
However, the Image.FromStream method does not exist on Windows Phone, and a casual search only turns up results that depend on that method.

You can use a method like this:
public static BitmapImage base64image(string base64string)
{
byte[] fileBytes = Convert.FromBase64String(base64string);
using (MemoryStream ms = new MemoryStream(fileBytes, 0, fileBytes.Length))
{
ms.Write(fileBytes, 0, fileBytes.Length);
BitmapImage bitmapImage = new BitmapImage();
bitmapImage.SetSource(ms);
return bitmapImage;
}
}
Add an image to your XAML, such as this:
<Image x:Name="myWonderfulImage" />
You can then set the source, like this:
myWonderfulImage.Source = base64image(yourBase64string);

BitmapImage PixelWidth and PixelHeight property from UriSource

I have this:
BitmapImage bi = new BitmapImage();
bi.CreateOptions = BitmapCreateOptions.None;
bi.UriSource = new Uri(url, UriKind.RelativeOrAbsolute);
,where url =www.xyz.com/abc.jpg
My question is "How to get the bi.PixelWidth and bi.PixelHeight?" because both are coming as zero. I want to resize big images in to thumbnails.
I have tried this one.

I am fairly new to WP7 development. I cam across this issue and is actually still trying to figure out how to do this.
But I could get it to work with WritableBitmap like so :
Uri uri = new Uri("/image.jpg", UriKind.Relative);
BitmapImage bitmapImage = new BitmapImage();
bitmapImage.CreateOptions = BitmapCreateOptions.None;
bitmapImage.UriSource = uri;
WriteableBitmap img = new WriteableBitmap(bitmapImage);
using (MemoryStream ms = new MemoryStream())
{
// write an image into the stream
Extensions.SaveJpeg(img, ms, img.PixelWidth, img.PixelHeight, 0, 100);
byte[] byteArray = ms.ToArray();
}

How to put image in a picture box from a byte[] in C#

I've a byte array which contains an image binary data in bitmap format. How do I display it using the PictureBox control in C#?
I went thru a couple of posts listed below but not sure if I need to convert the byte array into something else before sending it to a picturebox. I'd appreciate your help. Thanks!
How to put image in a picture box from Bitmap
Load Picturebox Image From Memory?

This function converts byte array into Bitmap which can be use to set the Image Property of the picturebox.
public static Bitmap ByteToImage(byte[] blob)
{
MemoryStream mStream = new MemoryStream();
byte[] pData = blob;
mStream.Write(pData, 0, Convert.ToInt32(pData.Length));
Bitmap bm = new Bitmap(mStream, false);
mStream.Dispose();
return bm;
}
Sample usage:
pictureBox.Image = ByteToImage(byteArr); // byteArr holds byte array value

byte[] imageSource = **byte array**;
Bitmap image;
using (MemoryStream stream = new MemoryStream(imageSource))
{
image = new Bitmap(stream);
}
pictureBox.Image = image;

using System.IO;
byte[] img = File.ReadAllBytes(openFileDialog1.FileName);
MemoryStream ms = new MemoryStream(img);
pictureBox1.Image = Image.FromStream(ms);
or you can access like this directly,
pictureBox1.Image = Image.FromFile(openFileDialog1.FileName);

You can also convert pictureBox image to byte array like this,
MemoryStream ms = new MemoryStream();
pictureBox1.Image.Save(ms,System.Drawing.Imaging.ImageFormat.Jpeg);
byte[] img = ms.ToArray();

The ImageConverter class in the System.Drawing namespace can do the conversion:
byte[] imageArray = **byte array**
ImageConverter converter = new ImageConverter();
pictureButton.Image = (Image)converter.ConvertFrom(imageArray);

If you want to use BinaryReader to convert then use like this,
FileStream fs = new FileStream(openFileDialog1.FileName, FileMode.Open, FileAccess.Read);
BinaryReader br = new BinaryReader(fs);
byte[] img = br.ReadBytes((int)fs.Length);

Try this for Converting Bitmap Images to array of bytes for jpeg pictures and png file types:
public byte[] UdfConvertPicToByte(Bitmap bitmapImages)
{
using (MemoryStream stream = new MemoryStream())
{
bitmapImages.Compress(Bitmap.CompressFormat.Png, 0, stream);
byte[] bitmapData = stream.ToArray();
bitmap.Compress(Bitmap.CompressFormat.Jpeg, 50, stream);
bitmapData = stream.ToArray();
return bitmapData;
}
}