[libvirt] C# bindings (Was: First patch)

[arnaud.champion at devatom.fr]

?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 at devatom.fr>
 *   Jaromír Cervenka <cervajz at cervajz.com>
 *
 * 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 at devatom.fr>
Sent: Tuesday, October 19, 2010 9:59 PM
To: "Justin Clift" <jclift at redhat.com>
Cc: "Libvirt Developers Mailing List" <libvir-list at redhat.com>
Subject: Re: [libvirt] 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 at redhat.com>
> Sent: Tuesday, October 19, 2010 9:46 PM
> To: "Arnaud Champion" <arnaud.champion at devatom.fr>
> Cc: "Libvirt Developers Mailing List" <libvir-list at redhat.com>
> Subject: Re: [libvirt] 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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> libvir-list at redhat.com
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> 
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