Re: C# bindings (Was: First patch)

[<arnaud.champion@xxxxxxxxxx>]

?Hi Justin,

I have written a little simple sample of using of C# bindings. In fact it is 
a sample project which connect to a clear TCP libvirt/qemu via 
virConnectOpen the list the storage pools. Here's the code :

/*
* Copyright (C)
*   Arnaud Champion <arnaud.champion@xxxxxxxxxx>
*   Jaromír Cervenka <cervajz@xxxxxxxxxxx>
*
* See COPYING.LIB for the License of this software
*
* Sample code for :
* Function :
*      virConnectOpen
*      virConnectNumOfStoragePools
*      virConnectListStoragePools
*/

using System;
using System.Windows.Forms;
using LibvirtBindings;

namespace virConnectOpen
{
   public partial class Form1 : Form
   {
       public Form1()
       {
           InitializeComponent();
       }

       private void btnConnect_Click(object sender, EventArgs e)
       {
           IntPtr conn = virConnect.Open(tbURI.Text);
           if (conn != IntPtr.Zero)
           {
               int numOfStoragePools = virConnect.NumOfStoragePools(conn);
               if (numOfStoragePools == -1)
                   ShowError("Unable to get the number of storage pools");
               string[] storagePoolsNames = new string[numOfStoragePools];
               int listStoragePools = virConnect.ListStoragePools(conn, ref 
storagePoolsNames, numOfStoragePools);
               if (listStoragePools == -1)
                   ShowError("Unable to list storage pools");
               foreach (string storagePoolName in storagePoolsNames)
                   lbStoragePool.Items.Add(storagePoolName);
           }
           else
           {
               ShowError("Unable to connect");
           }
       }

       private void ShowError(string message)
       {
           MessageBox.Show(message, "Error", MessageBoxButtons.OK, 
MessageBoxIcon.Error);
       }
   }
}


Also, the xls has some little change, you'll find the update joined to this 
email.

Regards,

Arnaud

--------------------------------------------------
From: <arnaud.champion@xxxxxxxxxx>
Sent: Tuesday, October 19, 2010 9:59 PM
To: "Justin Clift" <jclift@xxxxxxxxxx>
Cc: "Libvirt Developers Mailing List" <libvir-list@xxxxxxxxxx>
Subject: Re:  C# bindings (Was:  First patch)

> ?Well, I can make a little sample, with virConnectOpen instead of 
> virConnectOpenAuth, because virConnectOpenAuth cannot work without 
> callback handling, that's why it's larger. But I will be tomorrow ;) it's 
> time to sleep for me.
>
> --------------------------------------------------
> From: "Justin Clift" <jclift@xxxxxxxxxx>
> Sent: Tuesday, October 19, 2010 9:46 PM
> To: "Arnaud Champion" <arnaud.champion@xxxxxxxxxx>
> Cc: "Libvirt Developers Mailing List" <libvir-list@xxxxxxxxxx>
> Subject: Re:  C# bindings (Was:  First patch)
>
> > On 10/20/2010 05:08 AM, Justin Clift wrote:
> > > On 10/20/2010 04:57 AM, Eric Blake wrote:
> > > <snip>
> > > > > Ok, how's this?
> > > > >
> > > > > http://justinclift.fedorapeople.org/csharp/csharp.html
> > > >
> > > > Can we also include a sample program using the bindings, as is done in
> > > > http://justinclift.fedorapeople.org/csharp/python.html and
> > > > http://justinclift.fedorapeople.org/csharp/java.html?
> > >
> > > Good idea. Just added a space for one in the layout.
> > >
> > > Arnaud, would I be able to get an example program from you, for adding
> > > there? Is "virConnectOpenAuth" the correct kind of thing?
> >
> > Looked at the virConnectOpenAuth example (from Arnauds patches waiting
> > for review).  It doesn't seem like a suitable example for the web page,
> > as the example code is a lot longer/larger than we'd like for this.
> >
> > Arnaud, do you have time to create an extremely simple example?
> >
> > Something that shows the very minimum needed.  Sort of like this:
> > (I do not know C# at all though :>)
> >
> >   using System;
> >   using LibvirtBindings;
> >
> >   // Fill a virConnectAuth structure
> >   virConnectAuth auth = new virConnectAuth
> >   {
> >     cbdata = authData,  // The authData structure
> >     cb = AuthCallback,  // the method called by callbacks
> >     CredTypes = new[]
> >                     {
> >                       // The list of credentials types
> >                       virConnectCredentialType.VIR_CRED_AUTHNAME,
> >                       virConnectCredentialType.VIR_CRED_PASSPHRASE
> >                     }
> >   };
> >
> >   // Request the connection
> >   IntPtr conn = libVirt.virConnectOpenAuth(tbURI.Text, ref auth, 0);
> >
> >   // Get the pointer to the domain
> >   string domainName = new string "MyGuest";
> >   IntPtr domainPtr = libVirt.virDomainLookupByName(conn, domainName);
> >
> >   // Start the domain
> >   Int something = libVirt.virDomainCreate(domainPtr);
> >
> >   // Close the connection
> >   libVirt.virConnectClose(conn);
> >
> > ?
> >
> > Regards and best wishes,
> >
> > Justin Clift
>
> --
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Attachment: Bindings progress 20101020.xls
Description: MS-Excel spreadsheet

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