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A stream in .Net is a sequence of bytes. There are several types of streams. A common one is the MemoryStream which uses memory for its storage (as opposed to a file system, or something else). Several readers and writers require a stream as an input parameter, and you'll find that sometimes you'll just want to be able to easily convert from a string to a MemoryStream and back. Here are two easy utility methods to do that:
public static string GetStringFromMemoryStream(MemoryStream m)
{
if (m == null || m.Length == 0)
return null;
m.Flush();
m.Position = 0;
StreamReader sr = new StreamReader(m);
string s = sr.ReadToEnd();
return s;
}
public static MemoryStream GetMemoryStreamFromString(string s)
{
if (s == null || s.Length == 0)
return null;
MemoryStream m = new MemoryStream();
StreamWriter sw = new StreamWriter(m);
sw.Write(s);
sw.Flush();
return m;
}
We can easily test these with a round-trip method. Note that ideally we'd have one test for each specific method, but this is just for demo purposes:
[TestMethod]
public void Convert_RoundTrip()
{
string s1 = "Hello World!";
MemoryStream m = GetMemoryStreamFromString(s1);
Assert.AreEqual(12, m.Length);
string s2 = GetStringFromMemoryStream(m);
Assert.AreEqual(s1, s2);
}
