Rijndael算法报错"要解密的数据的长度无效"

[黄诚实]

调用解密方法的时候，报错"要解密的数据的长度无效"，本人菜鸟，希望高手指点~

        public static string Encrypt(string toEncrypt)
        {
            byte[] keyArray = UTF8Encoding.UTF8.GetBytes("12345678901234567890123456789012");
            byte[] toEncryptArray = System.Text.Encoding.UTF8.GetBytes(toEncrypt);
            RijndaelManaged rDel = new RijndaelManaged();
            rDel.Key = keyArray;
        
            rDel.Mode = CipherMode.ECB;
            rDel.Padding = PaddingMode.PKCS7;

            ICryptoTransform cTransform = rDel.CreateEncryptor();
            byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
            return Convert.ToBase64String(resultArray,0,resultArray.Length);
            //return UTF8Encoding.UTF8.GetString(resultArray);
           // return Encoding.UTF8.GetString(resultArray);
           
        }

        public static string Decrypt(string toDecrypt)
        {
            byte[] keyArray = UTF8Encoding.UTF8.GetBytes("12345678901234567890123456789012");
            byte[] toEncryptArray = System.Text.Encoding.UTF8.GetBytes(toDecrypt);
            RijndaelManaged rDel = new RijndaelManaged();
            rDel.Key = keyArray;
            rDel.Mode = CipherMode.ECB;
            rDel.Padding = PaddingMode.PKCS7;

            ICryptoTransform cTransform = rDel.CreateDecryptor();
            byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);

            return UTF8Encoding.UTF8.GetString(resultArray);
        }

[NdscFaineant]

byte[] toEncryptArray = System.Text.Encoding.UTF8.GetBytes(toDecrypt);
改为byte[] toEncryptArray = Convert.FromBase64String(toDecrypt);

[黄诚实]

行了，谢谢，是啥原理

[NdscFaineant]

加密时return Convert.ToBase64String(resultArray,0,resultArray.Length);是转换成Base64字符串，
解密时要做反向的变换，从Base64字符串转换成字节。

[黄诚实]

谢谢大师