dotnet and byte arrays

[ypuech]

Hi Ben,

I've tried to get this working but it seems that the "byte" value is auto converted to Int32 by MAXScript :D.
There's several problem with dotNet in MAXScript in this kind of case. It's the same problem when we want to build an object array : object[].

[ypuech]

So, I think that the best solution is to create a .NET class library (C#/VB.NET) that does the job for you.
In MAXScript you can pass it the string you want to post as a web request and in C#/VB.NET the encoding stuff is done.

[Bennels]

Thanks ypuech, I'll look into this, as it's has been a long few days trouble shooting this problem.

I went to your website, seems you have some reading material on this very process. :)

I'll let you know how I go.

Thanks!

[ypuech]

Hi Ben,

Yes I've written the article Using a .Net 2.0 Class Library in MASXcript (http://ypuechweb.free.fr/Files/dotNetClassLibraryHello.zip).
I think it will help some scripters that do not know advanced/windows programming.

[rdg]

Yannick,

thank you.
I still haven't installed my max 9, but after reading your pdf I am eager for it ...

Georg

[Bennels]

Ok, so I've installed MS Visual C# Express and I've built an assembly. However, I can't seem to get the security web permissions working... And there seems to be little help available on the topic.
Here's what I have so far. It throws an exception when you try to connect()


#region Referenced Assemblies
using System;
using System.Net;
using System.IO;
using System.Text;
using System.Security.Permissions;
#endregion // Referenced Assemblies

// [assembly: WebPermissionAttribute(SecurityAction.RequestMinimum, Unrestricted = true)] // This doesn't work either.
// Usage in maxscript:
// request = dotNetObject "Wrangler.webrequest"
// request.url = "http://10.1.1.3"
// request.postdata = "project_id=hello"
// print (request.connect())

namespace wrangler
{
public class webrequest
{
private string url;
private string postdata;
public string Url { get { return url; } set { url = value; } }
public string Postdata { get { return postdata; } set { postdata = value; } }

#region Methods

public string connect()
{


//try
//{
// Create a WebPermission.instance.
WebPermission myWebPermission = new WebPermission(NetworkAccess.Connect, "http://10.1.1.3");
myWebPermission.AddPermission(NetworkAccess.Accept, "http://10.1.1.3");
myWebPermission.Demand();

// Everything after this should have permission to access http://10.1.1.3

// Create a 'WebRequest' object with the specified url.
WebRequest myWebRequest = WebRequest.Create("http://10.1.1.3");

UTF8Encoding utf8 = new UTF8Encoding();

// Encode the string.
Byte[] postBuffer = utf8.GetBytes(this.postdata);

// Set properties of the WebRequest.
myWebRequest.Method = "POST";
myWebRequest.ContentType = "application/x-www-form-urlencoded";
myWebRequest.ContentLength = postBuffer.Length;
myWebRequest.Timeout = 5000; // 5 seconds

Stream newStream = myWebRequest.GetRequestStream();
newStream.Write(postBuffer, 0, postBuffer.Length);

// Close the Stream object.
newStream.Close();

// Assign the response object of 'WebRequest' to a 'WebResponse' variable.
WebResponse myWebResponse = myWebRequest.GetResponse();
Stream responseStream = myWebResponse.GetResponseStream();

Encoding encode = System.Text.Encoding.GetEncoding("utf-8");

StreamReader readStream = new StreamReader(responseStream, encode);
String htmlString = readStream.ReadToEnd();

readStream.Close();

return htmlString;

//}
//catch
//{
// return "No access";
//}

}

#endregion // Methods
}
}


Any help would be appeciated.

[ypuech]

Hi Ben,

The problem in MAXScript is that you cannot debug the class library. So, the better solution is to test/debug it in C#; to view where the system throws an exception in connect().

I'm not very experienced in web development with .NET framework; you can find many .NET samples at http://www.codeproject.com/
There's many others interesting websites/communities covering .NET.


It's better to use the properties :
request.url = "http://10.1.1.3" -> request.Url
request.postdata = "project_id=hello" -> request.Postdata

MAXScript allows the access of private data ?!

[Bennels]

Hi ypuech,

I've got it all sussed now... the permission problem was coming down to the location of the dll file, which was on a network drive, while it needed to be a sub dir of the 3dsmax root.

So now I can start learning some more dotnet, it really is quite powerful. Particularly in addition to maxscript.

Thanks for your help.

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