Object reference not set to an instance of an object

Question

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using System;
using System.Drawing;
using System.IO;
using System.Collections;
using System.ComponentModel;


	/// <summary>
	/// Description of ImageConverter.
	/// </summary>
	public class ImageConverter
	{
		public ImageConverter()
		{
		}
        public byte[] imageToByteArray(System.Drawing.Image imageIn)
        {
            using (var ms = new MemoryStream())
            {
                imageIn.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg); //right here
                return ms.ToArray();
            }
        }

What I have tried:

I dont really know why it throws that exception. Please help me guys

Posted 21-Sep-16 21:54pm

Member 12724527

Updated 21-Sep-16 22:14pm

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Comments

InbarBarkai 22-Sep-16 4:10am

Is imageIn null?

Member 12724527 22-Sep-16 4:35am

Hey, I think you're right. I think I forgot to set a default Image. Silly me. Thanks bro

2 solutions

Solution 1

Possibly because imageIn doesn't contain a reference to a valid object.
You should post error message full details in order to get better help.

Posted 21-Sep-16 22:12pm

CPallini

Comments

Member 12724527 22-Sep-16 4:33am

That's all that i have noticed I probably missed something.

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Alex Banu · Accepted Answer · 2016-09-21T22:14:00

try like this, and check VS console for exception:

C#

public byte[] imageToByteArray(System.Drawing.Image imageIn)
        {
           if (imageIn!=null){
            using (var ms = new MemoryStream())
            {
                try{
                  imageIn.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg); //right here
                
                  return ms.ToArray();
                 }
                 catch(Exception ex){
                 Console.WriteLine("See me:"+ex.Message);
                  }
            }
           } else return null;
        }