How do check byte() is null in IIF condition in VB

Question

0.00/5 (No votes)

See more:

I have a column value in Hash format in db and column datatype is varbinary(8000).I convert it into byte array.

Problem is some time this column value has null value,now in my code I want to check if column value has null value then return default value of byte array,otherwise return column value using following code

What I have tried:

VB

<pre> objUser.Password_Hash = IIf(reader("Password_Hash") Is Nothing, {}, reader("Password_Hash"))

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

Posted 10-May-17 19:29pm

Sajid227

Updated 10-May-17 19:56pm

v2

Add a Solution

1 solution

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)

Sajid227 · Answer 1 · 2017-05-10T19:56:00

Solution 2

Here Is The Solution of this problem.

VB

objUser.Password_Hash = If(reader.IsDBNull(reader.GetOrdinal("Password_Hash")),
                           New Byte() {},
                           DirectCast(reader("Password_Hash"), Byte()))

Posted 10-May-17 19:56pm

Sajid227