File not found exception was unhandled (system.byte[])

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pictureBox1.Image = Image.FromFile(dataGridView1.SelectedRows[0].Cells["dgimg"].Value.ToString());

Note: Am going to get the grid-view data into picture box while fetching the data am facing system.Byte[] issue

What I have tried:

<pre>pictureBox1.Image = Image.FromFile(dataGridView1.SelectedRows[0].Cells["dgimg"].Value.ToString());

Note: Am going to get the grid-view data into picture box while fetching the data am facing system.Byte[] issue

Posted 20-Apr-20 20:52pm

Member 11297177

Updated 20-Apr-20 21:44pm

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3 solutions

Solution 2

I think you need at least 2 things

1) a try/catch exception handler around your file code

2) debug print the contents of the cell dataGridView1.SelectedRows[0].Cells["dgimg"].Value.ToString() and ensure the value represents a full & correct path to the file, not just a relative path .. btw, if you implemented item (1) and logged the exception, it would probably show the existing file path and from that you may get the issue

Posted 20-Apr-20 21:05pm

Garth J Lancaster

Updated 20-Apr-20 21:07pm

v3

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OriginalGriff · Accepted Answer · 2020-04-20T21:01:00

Look at the error message:

File not found exception was unhandled

It's couldn;t be any clearer if it tried: the file you told it to load the image from does not exist.

We can't help you with that: we don't have any access to your file system, or any idea what path you are feeding to the method - and you need both to try and work out what the problem might be.

So, it's going to be up to you.
Fortunately, you have a tool available to you which will help you find out what is going on: the debugger. If you don't know how to use it then a quick Google for "Visual Studio debugger" should give you the info you need.

Put a breakpoint on the first line in the function, and run your code through the debugger. Then look at your code, and at your data and work out what should happen manually. Then single step each line checking that what you expected to happen is exactly what did. When it isn't, that's when you have a problem, and you can back-track (or run it again and look more closely) to find out why.

Sorry, but we can't do that for you - time for you to learn a new (and very, very useful) skill: debugging!

Patrice T · Accepted Answer · 2020-04-20T21:45:00

Quote:
File not found exception was unhandled (system.byte[])

Which word you don't understand in "File not found" ?
You need to get the file name and check it:

C#

ImageFileName = dataGridView1.SelectedRows[0].Cells["dgimg"].Value.ToString();

By using an intermediate variable, you are able to print the file name you are looking for.

File not found exception was unhandled (system.byte[])

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