Color Detection in WPF

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I have done a project in Visual C# Express 2010. When we move a mouse pointer on to the image and click on a image, the color under the mouse pointer would be displayed and R,G,B values can be displayed in a textbox.

But I am unable to do the same project in Silverlight Application i.e., WPF by Visual Web Developer 2010. Can anybody help me regarding this?

I can post the whole code to individual e-mail, if I get any response to this question.

Posted 19-Apr-11 19:29pm

Member 7810323

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Bruno Tagliapietra 22-Apr-11 10:04am

try sending code in a zip file at bruno.tagliapietra@gmail.com

if you're sending a whole solution folder, "Clean" away the exe files from visual studio first.

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sudheer muhammed · Answer 1 · 2011-04-25T00:44:00

Solution 1

You can use tooltip and bind the RGB values as tooltip text .
Can you tell which control is used for displaying the color ?

Posted 25-Apr-11 0:44am

sudheer muhammed

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Member 7810323 26-Apr-11 19:56pm

I have used the below code.

WriteableBitmap wb = new WriteableBitmap(image1, null);
double x = e.GetPosition(this).X;
double y = e.GetPosition(this).Y;
textBox1.Text = x.ToString();
textBox2.Text = y.ToString();

int col = wb.Pixels[(int)(y * image1.Width) + (int)x];
textBox3.Text = ((col >> 16) & 0xFF).ToString() + " " +
((col >> 8) & 0xFF).ToString() + " " +
((col >> 0) & 0xFF).ToString();

Can anybody please modify this code to get the color at a particular pixel from the image. and I should be able to display the RGB values of that color too.

Abhinav S · Answer 2 · 2011-04-25T01:02:00

Solution 2

This[^] might be possible using the WriteableBitmap class.

Posted 25-Apr-11 1:02am

Abhinav S

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Member 7810323 26-Apr-11 19:56pm

I have used the below code.

WriteableBitmap wb = new WriteableBitmap(image1, null);
double x = e.GetPosition(this).X;
double y = e.GetPosition(this).Y;
textBox1.Text = x.ToString();
textBox2.Text = y.ToString();

int col = wb.Pixels[(int)(y * image1.Width) + (int)x];
textBox3.Text = ((col >> 16) & 0xFF).ToString() + " " +
((col >> 8) & 0xFF).ToString() + " " +
((col >> 0) & 0xFF).ToString();

Can anybody please modify this code to get the color at a particular pixel from the image. and I should be able to display the RGB values of that color too.