C# .NET StreamReader() returning literal length of buffer as a string instead of actual stream data-CodePudding

I'm not even sure how to adequately describe this problem. In reading a stream, the text string I am building in chunks is just the literal length of the buffer, over and over again.

string json = "";

context.Request.InputStream.Position = 0;

using (StreamReader inputStream = new StreamReader(context.Request.InputStream)) {

    while (inputStream.Peek() >= 0) {

        char[] buffer = new char[4096];

        json  = inputStream.Read(buffer, 0, buffer.Length);

        System.Console.WriteLine(jsonInput.Length);

    }

}

// json = "40964096409640964096 ... 4096"

Any idea what's wrong here?

Thanks

CodePudding user response：

inputStream.Read(buffer, 0, buffer.Length); returns the number of bytes read from the stream, which is 4096 as long as there's data available. The operator on string in json = ... does an implicit conversion to string, so what you're summing up in the json variable is really a concatenation of the buffer length. What you want to do is to concatenate the buffer instead, eg with

int dataRead = inputStream.Read(buffer, 0, buffer.Length);
json  = Encoding.ASCII.GetString(buffer, 0, dataRead);