IVsExtensionManager.CreateExtension Method

Article
02/21/2011

Extension factory method.

Namespace: Microsoft.VisualStudio.ExtensionManager
Assembly: Microsoft.VisualStudio.ExtensionManager (in Microsoft.VisualStudio.ExtensionManager.dll)

Syntax

'Declaration
Function CreateExtension ( _
    extensionPath As String _
) As IExtension

IExtension CreateExtension(
    string extensionPath
)

IExtension^ CreateExtension(
    String^ extensionPath
)

abstract CreateExtension : 
        extensionPath:string -> IExtension

function CreateExtension(
    extensionPath : String
) : IExtension

Parameters

extensionPath
Type: System.String
Path of a VSIX manifest file.

Return Value

Type: Microsoft.VisualStudio.ExtensionManager.IExtension
The IExtension object that contains the metadata in the VSIX manifest for an extension.

Remarks

Although this API supports the Extension Manager infrastructure, we recommend that you do not use it because it is subject to change.

Examples

The following example uses GetEnabledExtensionContentLocations to get the locations of all extensions of a particular custom type. It then uses CreateExtension to access the other metadata for every extension found and get its name. After it saves the names and path information, it creates menu commands for each extension.

// This is the CommandID of the placeholder menu item, 
// as defined in the .vsct file.
int CmdIdBase = 0x103;

// These lists will store name and path information.
private ArrayList SkinNames = new ArrayList();
private ArrayList SkinPaths = new ArrayList();

// Call this from Initialize().
private void InitSkinList()
{
    var mcs = GetService(typeof(IMenuCommandService)) 
        as OleMenuCommandService;
    int counter = CmdIdBase;

    // Get the Extension Manager service.
    var ExtMgrSvc = GetService(typeof(SVsExtensionManager)) 
        as IVsExtensionManager;

    // Iterate through installed extensions.
    var attributes = new Dictionary<string, string>();
    attributes.Add("Type", "Skin");
    foreach (string SkinPath
        in ExtMgrSvc.GetEnabledExtensionContentLocations(
        "CustomExtension", attributes))
    {
        // Store the name and path information.
        SkinPaths.Add(SkinPath);
        SkinNames.Add(ExtMgrSvc.CreateExtension(SkinPath).Header.Name);

        // Create a CommandID for the new menu item.
        var cmdID = new CommandID(
            GuidList.guidVSSkinHostCmdSet, counter);

        // Create the menu item and add its event handlers.
        var mc = new OleMenuCommand(
            new EventHandler(OnSkinExec), cmdID);
        mc.BeforeQueryStatus += new EventHandler(OnSkinQueryStatus);
        mcs.AddCommand(mc);

        counter ++;
    }
}

private void OnSkinQueryStatus(object sender, EventArgs e)
{
    var menuCommand = sender as OleMenuCommand;
    if (null != menuCommand)
    {
        // Determine which menu item was queried.
        int skinIndex = menuCommand.CommandID.ID - this.CmdIdBase;
        if (skinIndex >= 0 && skinIndex < this.SkinNames.Count)
        {
            // Set the text.
            menuCommand.Text = this.SkinNames[skinIndex] as string;
        }
    }
}

private void OnSkinExec(object sender, EventArgs e)
{
    var menuCommand = sender as OleMenuCommand;
    if (null != menuCommand)
    {
        // Get the name of the skin from the menu item.
        string skinName = menuCommand.Text;

        // Locate the name in the list of skins. 
        int i = this.SkinNames.IndexOf(skinName);

        // Get the corrsponding path.
        var skinPath = SkinPaths[i] as string;

        if (SkinNames.Count > 0)
        {         
            if (File.Exists(skinPath) || Directory.Exists(skinPath))
            {
                // Put code here to apply the skin extension...
                MessageBox.Show("Skin " + skinName + " found:\r\n" 
                    + skinPath + ". \r\n\r\nApplying skin...");
            }
           else MessageBox.Show("Could not find skin " + skinName);
        }
    }
}

.NET Framework Security

Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.

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