I need send a IFeature element to a dockable window.

I tried creating a public static variable, in eManager Class, that is inicialized with a feature that catch a function:

public static IFeature pFeature;
    internal void ShowEntityDetails(IFeature feature)
        pFeature = feature;
        IDockableWindow dockWindow = GetDockWindow(ThisAddIn.IDs.GMREAddin_Modules_Model_View_vEntityDetails);

And I get it in dockable window construct of this way:

public vEntityDetails()
        IFeature pFeature = eManager.pFeature;
        if (pFeature == null) return;

        string streetName = pFeature.Value[pFeature.Fields.FindField("ALIAS")].ToString();

It only works the first time.

There any more professional way to do that?


There are several ways to skin this cat. I typically use an Addin Extension to manage most communications between components of the addin, including Dockable Windows.

In the Extension, for instance I have a global variable _DockWin and an Edit Event listener (where Events is the Editor cast as IEditEvents_Event):

private IDockableWindow _DockWin;

void Events_OnSelectionChanged()
    // See if dock win exists
    if (_DockWin == null) { _DockWin = GetDockWin(); }
    if (_DockWin == null) { return; }

    if (_Editor.SelectionCount > 0)
        // pass the edit selection to a  method in the dockable window

In the above method I first attempt to get a reference to the Dock Win before continuing, using this method:

private IDockableWindow GetDockWin()
    // Only get/create the dockable window if they ask for it
    if (_DockWin == null)
        UID dockWinId = new UID();
        dockWinId.Value = ThisAddIn.IDs.MyDockWinName;
        _DockWin = ArcMap.DockableWindowManager.GetDockableWindow(dockWinId);
    return _DockWin;

The AddSelection method in the dockable window looks like this, but can do anything you wish to pass the information to a control. In my case, I pass selected features to a TreeView control (similar to the Editor Attribute Window). You first declare a global control variable (_tv), and in the constructor method assign a value (in my case the name of the control is tv).

public static TreeView _tv;

public MyDockWinName(object hook)
    this.Hook = hook;

    _tv = this.tv;

internal static void AddSelection(IEnumFeature editSelection)
    IEnumFeature enumFeat = editSelection;
    IFeature feature;

    int idx = -1;
    IFeatureClass fc = null;
    while ((feature = enumFeat.Next()) != null)
        if (((IFeatureClass)feature.Class) != fc)
            idx += 1;
            fc = (IFeatureClass)feature.Class;
            TreeNode tn = new TreeNode();
            tn.Text = fc.AliasName;
            tn.Tag = fc;
        TreeNode child = new TreeNode();
        child.Text = feature.OID.ToString();
        child.Tag = feature;


    if (_tv.Nodes.Count > 0)
        _tv.SelectedNode = _tv.Nodes[0].Nodes[0];
  • Thanks my friend, I created static variables and referenced them in my construct. – Pilgrim May 11 '17 at 17:05

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