18 replies to this topic

[smarcus3]

In my program I am trying to add the following references. I use these for a c# program I use to get stock data. using System.Collections.Generic using System.Linq using System.Web using System.Web.UI using System.Xml.Linq Please help.

[smarcus3]

I need 2 more as well ... using System.Net; using System.Net.Mail;

[Chris Walker]

Hi smarcus3, Most/all of these are features which exist in the .NET Framework on the desktop, but not in the .NET Micro Framework. .NET Micro Framework is a subset of the full .NET Framework -- plus features designed expressly for microcontrollers (like analog inputs, input/output on MCU pins, PWM, etc.) Chris

[smarcus3]

Is there a way to get filestream?

[smarcus3]

I want to read in a page like this one ... http://www.google.co.../api?stock=GOOG

[smarcus3]

1 last thing the xml files should always be approx 1kb

[Chris Walker]

Is there a way to get filestream?

Sure thing. Pull in System.IO.dll.

Chris

[smarcus3]

I already have using system.io and it doesn't work. Do you mean something else?

[smarcus3]

Nevermind. Had a brain fart. I guess it happens at 230AM

[smarcus3]

My link is apparently a URI. Any ideas how to read it?

[Chris Walker]

My link is apparently a URI. Any ideas how to read it?

You can use System.Net.Sockets (or the HttpWebRequest class).

Take a look at the "SocketClint" sample in the .NET MF SDK.

Chris

[smarcus3]

where are those examples? Thanks for all the help.

[smarcus3]

nvm

[smarcus3]

That example seems to work for a webpage but not the uri page that just returns an xml

[smarcus3]

This code only get the first 2 lines of the xml file. Why is that??? StreamReader reader = new StreamReader(WebRequest.Create(url).GetResponse().GetResponseStream());

[smarcus3]

I believe I got it working using the HTTPWebRequest. I don't have my netduino here yet so I write my code using the .netMF side and paste it into a .net program to simulate the results.

Here is the code:

string url = "http://www.google.com/ig/api?stock=" + symbol;


            // used to build entire input
            StringBuilder sb = new StringBuilder();

            // used on each read operation
            byte[] buf = new byte[8192];

            // prepare the web page we will be asking for
            HttpWebRequest request = (HttpWebRequest)
                WebRequest.Create(url);

            // execute the request
            HttpWebResponse response = (HttpWebResponse)
                request.GetResponse();

            // we will read data via the response stream
            Stream resStream = response.GetResponseStream();

            string tempString = null;
            int count = 0;

            do
            {
                // fill the buffer with data
                count = resStream.Read(buf, 0, buf.Length);

                // make sure we read some data
                if (count != 0)
                {
                    // translate from bytes to ASCII text
                    tempString = Encoding.ASCII.GetString(buf, 0, count);

                    // continue building the string
                    sb.Append(tempString);
                }
            }
            while (count > 0); // any more data to read?

            string temp = sb.ToString();

And here is the stringbuilder class.

using System;
using Microsoft.SPOT;
using System.Collections;

namespace System.Text
{
 
        class StringBuilder
        {
            ArrayList m_charArray = new ArrayList();

            public StringBuilder()
            {
            }

            public StringBuilder(string value)
                : base()
            {
                Append(value);
            }

            public void Append(string value)
            {
                Char[] charArray = value.ToCharArray();
                Append(charArray, 0, charArray.Length);
            }

            public void Append(char[] value, int startIndex, int charCount)
            {
                for (int index = startIndex; index < startIndex + charCount; index++)
                    m_charArray.Add(value[index]);
            }

            public int Length
            {
                get
                {
                    return m_charArray.Count;
                }
            }

            public override string ToString()
            {
                return new string((char[])m_charArray.ToArray(typeof(char)));
            }
            }
        }
    

[Wasatch Wired]

Sure thing. Pull in System.IO.dll.

Chris

Can you explain "Pull in System.IO.dll"?
I am trying to write to an SD card on a Netduino Plus and I either get the error that I'm missing a namespace or dll, or when I go 'Project' -> 'Add Reference', I'm not sure what I'm supposed to do as there are a few tabs, but nothing that allows any adding of anything. I'm familiar with Eclipse, and Visual Studio is very new to me.

[Chris Walker]

HI Wasatch,

Can you explain "Pull in System.IO.dll"?
I am trying to write to an SD card on a Netduino Plus and I either get the error that I'm missing a namespace or dll, or when I go 'Project' -> 'Add Reference', I'm not sure what I'm supposed to do as there are a few tabs, but nothing that allows any adding of anything. I'm familiar with Eclipse, and Visual Studio is very new to me.

Oh, no problem. Right click on your References folder in the Solution Explorer pane and then select "Add References...". Click on the first tab (.NET). Scroll down to "System.IO", select it, and press OK.

Chris

[Teets]

I don't have my netduino here yet so I write my code using the .netMF side and paste it into a .net program to simulate the results.

You can run your MF code against the emulator... would be a more reliable approach, too.