I'm trying to send a JSON string, from an Android 2.3 application, using Java 1.5, converted into a byte[] to an ASP.NET WebService method that is waiting for a POST Base64Binary stream.
Here is my Java code to encode the JSON string :
String encoded = Base64.encodeToString(me.getValue().getBytes(), Base64.DEFAULT);
me is my JSON string.
Here is the error I'm getting from ASP.NET :
System.ArgumentException: Cannot convert eyJJZEV0YXRJbnNwZWN0aW9uIjoiMSIsIkFwcGxpY2FibGUiOiJUcnVlIiwiSWRFdGF0IjoiMSIsIklkVGFzayI6IjczOCIsIkRhdGVEZXJuaWVyTW9kaWYiOiIyMDExLTEyLTA5IDIwOjA5OjIyIiwiSWRDb250cmF0IjoiMzg1NTYiLCJJZFRhc2tDb250cmF0IjoiNDc5ODExMSJ9 to System.Byte.
Parameter name: type ---> System.FormatException: Input string was not in a correct format.
at System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal)
at System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info)
at System.Byte.Parse(String s, NumberStyles style, NumberFormatInfo info)
at System.String.System.IConvertible.ToByte(IFormatProvider provider)
at System.Convert.ChangeType(Object value, Type conversionType, IFormatProvider provider)
at System.Web.Services.Protocols.ScalarFormatter.FromString(String value, Type type)
--- End of inner exception stack trace ---
at System.Web.Services.Protocols.ScalarFormatter.FromString(String value, Type type)
at System.Web.Services.Protocols.ValueCollectionParameterReader.Read(NameValueCollection collection)
at System.Web.Services.Protocols.HtmlFormParameterReader.Read(HttpRequest request)
at System.Web.Services.Protocols.HttpServerProtocol.ReadParameters()
at System.Web.Services.Protocols.WebServiceHandler.CoreProcessRequest()
Any idea why I'm getting this error (I can't control the .NET side) ?
Thanks! Nicolas.
I faced a similar problem before. I had implemented a code on Android to do SHA-1 hashing using Base64.
I was also doing SHA-1 hashing on server side in my web service method in .NET
Here is what my server side code looks like (.asmx web service)
public class Service1 : System.Web.Services.WebService
{
[WebMethod]
public string HashCode(string str)
{
string rethash = "";
try
{
System.Security.Cryptography.SHA1 hash = System.Security.Cryptography.SHA1.Create();
System.Text.ASCIIEncoding encoder = new System.Text.ASCIIEncoding();
byte[] combined = encoder.GetBytes(str);
hash.ComputeHash(combined);
rethash = Convert.ToBase64String(hash.Hash);
}
catch (Exception ex)
{
string strerr = "Error in HashCode : " + ex.Message;
}
return rethash;
}
}
This worked for me and I could compute the hash of my byte array properly.
Hope this gives you some idea,
Cheers
All the best
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