If your WCF service is unexpectedly receiving a null parameter value, try this…

An interesting problem ate up an hour and a half of my life yesterday morning. It was all to do with a WCF service.

The parameter that I was carefully formulating on one end of the wire and passing to my service proxy was not being received by my service at the other end - instead it was getting a null value. It worked the day before - why had it stopped working overnight?

After much head-scratching, I thought of checking the history of our Server project in the Source code repository. That gave me the clue I needed. In the file containing the interface which defines the service's contract, I noticed that the name of the parameter on the method in question had been changed.

Unable to translate Unicode character \uDBC0 at index to specified code page.

This error will come when we are doing some data encoding in HTML encoding in ASP.net. The following code is solution for the same...


string asAscii = Encoding.ASCII.GetString(
Encoding.Convert(
Encoding.UTF8,
Encoding.GetEncoding(
Encoding.ASCII.EncodingName,
new EncoderReplacementFallback(string.Empty),
new DecoderExceptionFallback()
),
Encoding.UTF8.GetBytes(line)
)

this might be save your time.....

Happy Coding..

Thanks,
Rajesh