Invalid length for a base-64 char array or string.

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public ActionResult CreditNote(string CNId)
{
Int64 crnId = 0;
//try
//{
if (!string.IsNullOrEmpty(CNId))
{
crnId = Convert.ToInt64(System.Text.Encoding.UTF8.GetString((Convert.FromBase64String(CNId))));
}

What I have tried:

public ActionResult CreditNote(string  CNId)
        {
            Int64 crnId = 0;
            //try
            //{
                if (!string.IsNullOrEmpty(CNId))
                {
                    crnId = Convert.ToInt64(System.Text.Encoding.UTF8.GetString((Convert.FromBase64String(CNId))));
                }

Posted 11-Mar-19 20:16pm

Member 12183079

Updated 11-Mar-19 20:27pm

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Peter_in_2780 · Answer 1 · 2019-03-11T20:27:00

Solution 1

Base64 strings must be a multiple of 4 characters, and I'm guessing your CNId is not. See Base64 - Wikipedia[^] for a good description of the Base64 rules, including padding.

Posted 11-Mar-19 20:27pm

Peter_in_2780