Error: Unable to cast object of type 'System.Int32' to type 'System.Byte[]'

Question

1.00/5 (1 vote)

See more:

ASP.NET

Line 54: <itemtemplate>
Line 55: <asp:Image ID="Image1" runat="server" ImageUrl='<%# "data:b/jpg;base64," + Convert.ToBase64String((byte[])Eval("a")) %>' Height="150px" Width="150px"/>
Line 56: </itemtemplate>

Posted 7-Oct-15 2:58am

Member 12039969

Updated 7-Oct-15 3:04am

Naveen.Sanagasetti

v2

Add a Solution

Comments

Member 12039969 7-Oct-15 9:00am

there i convert it as base64, but also it gives a same error

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Kornfeld Eliyahu Peter · Answer 1 · 2015-10-07T03:07:00

Solution 1

It seems that Eval("a") (whatever it is) returns an Int32 value...You can not cast an int to a byte array - you need to convert it...
Try this:

C#

BitConverter.GetBytes(Eval("a"))

https://msdn.microsoft.com/en-us/library/de8fssa4(v=vs.110).aspx[^]

Posted 7-Oct-15 3:07am

Kornfeld Eliyahu Peter

CPallini · Answer 2 · 2015-10-07T03:08:00

Solution 2

You may use the BitConverter class[^].

Posted 7-Oct-15 3:08am

CPallini