encode and decode error: invalid character in a base-64 string.

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Hello guys,

can u suggest me how to solved this error.

Error: "Invalid character in a Base-64 string".

I am sending query string in encoded format and Retrieved it on another page and decode it.Encode and Decode is performed using two methods mentions bellowed.

C#

txtclientcode.Text = Page.Request.Form["clientcode"].ToString();
TextBox1.Text = DecodeTo64UTF8(txtclientcode.Text.ToString());

and methods are

C#

private static string EncodeTo64UTF8(string str)
{

    byte[] toEncode2Bytes = System.Text.Encoding.UTF8.GetBytes(str);

    string sReturnValue = System.Convert.ToBase64String(toEncode2Bytes);

    return sReturnValue;

}

private static string DecodeTo64UTF8(string eValue)
{

   byte[] encodedDataBytes = System.Convert.FromBase64String(eValue);

   string sReturnValue = System.Text.Encoding.UTF8.GetString(encodedDataBytes);

   return sReturnValue;

}

Thanks,
Pinank Kella.

Posted 19-Jul-12 20:21pm

Pratham4950

Updated 19-Jul-12 20:41pm

Tejas Vaishnav

v2

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Christian Graus · Answer 1 · 2012-07-19T20:38:00

Solution 1

The error means that your encoded string going in, is broken. It's probably been modified along the way, use the debugger to check the value coming out against what comes out of the encode method.

Posted 19-Jul-12 20:38pm

Christian Graus

Comments

Pratham4950 20-Jul-12 3:07am

No, when I try on local host then I have getting right value. but when I upload this code that time this error is occurred.

Tejas Vaishnav · Answer 2 · 2012-07-19T20:54:00

i tried to check your code.
but it's working fine, so i think there is some thing wrong to your another code for sending query string or anything else.

i test it like this and it will working fine.

C#

private static string EncodeTo64UTF8(string str)
        {
            byte[] toEncode2Bytes = System.Text.Encoding.UTF8.GetBytes(str);

            string sReturnValue = System.Convert.ToBase64String(toEncode2Bytes);

            return sReturnValue;
        }

        private static string DecodeTo64UTF8(string eValue)
        {

            byte[] encodedDataBytes = System.Convert.FromBase64String(eValue);

            string sReturnValue = System.Text.Encoding.UTF8.GetString(encodedDataBytes);

            return sReturnValue;

        }

        protected void EncodeDecodTest()
        {
            string str = "id=43&name='xyz'";
            string encode = EncodeTo64UTF8(str);
            string decode = DecodeTo64UTF8(encode);
        }

IMeaw · Answer 3 · 2014-02-27T21:19:00

Solution 3

I want to decrypt password is "ฆฉ but error Invalid character a Base - 64 bit .how to do decrypt password?

Posted 27-Feb-14 21:19pm

IMeaw