ArcGIS 10 Addins write to a form

Question

Hi

I can't figure how to write the output after pressing a button to a form within my project, can anyone help with this?

I tought it ould be as simple as either addressing the dockable window (DocWindow) and then the listbox (lstResults) control but I just can't get it to work.

Any help appreciated.

Stephen

StephenBarrow · Answer

Thanks Sandhya

It is now coming back to me!  I now have the list box successfully listing the data.  I really tried to make a simple tack so complicated!

Cheers for your help.

Stephen

SandhyaYamarthi · Answer

Thanks for the help I didn't have the list control set to public so I changed this but I am still getting a null reference when I try to address it.

My code was quite similar to yours (VB.NET) and I now have:

Protected Overrides Sub OnClick()  
 Dim m As imap  
 Dim e As IEnumLayer  
 m = My.ArcMap.Document.FocusMap  
 e = m.Layers(Nothing, True)  
 e.Reset()  
 Dim layer As ILayer  
 layer = e.Next  
 Dim dockWindow As ESRI.ArcGIS.Framework.IDockableWindow  
 Dim dockWinID As UID = New UIDClass()  
 dockWinID.Value = My.ThisAddIn.IDs.pradDocWin  
 dockwindow = My.ArcMap.DockableWindowManager.GetDockableWindow(dockWinID)  
 While Not (layer Is Nothing)  
   dockWindow.docwinlistbox.items.add(layer.Name) 
 layer = e.Next  
 End While  
 dockWindow.Show(True)  
 End Sub

The red section holds the problem line with docwinlistbox coming out as a null - the list box is called this on the form - name property and as I mentioned before the Modifiers=Public now..

Thanks

Stephen

yes, there was an error at that line you wrote.
You should call the docwinlistbox with the Dockablewindow class itself, not with the object on the Dockable window.
For this to work, you need to create a static listbox variable on the dockablewindow class and assign the 'docwinlistbox' to it and then you can call the newly created static listbox variable to add the items.

code in the dockablewindow class:
public partial class pradDocWin: UserControl
{
 public static ListBox lb;

public pradDocWin(object hook)
{
 InitializeComponent();
 this.Hook = hook;
 lb = docwinlistbox;

}

So now replace that red line in the add-in button's class with the line below:

pradDocWin.lb.items.add(layer.Name)

Actually you need to clear existing list box items before adding the new items when you click the Add-in button to display the results list box on the form. Other wise, when you close the form and try to redisplay the form, the list box will have duplicate entries.

so you should write this code as:
pradDocWin.lb.items.clear( );
pradDocWin.lb.items.add(layer.Name)

hope it should work now!!

StephenBarrow · Answer

Good luck!

Thanks for the help I didn't have the list control set to public so I changed this but I am still getting a null reference when I try to address it.

My code was quite similar to yours (VB.NET) and I now have:

Protected Overrides Sub OnClick()
 Dim m As imap
 Dim e As IEnumLayer
 m = My.ArcMap.Document.FocusMap
 e = m.Layers(Nothing, True)
 e.Reset()
 Dim layer As ILayer
 layer = e.Next
 Dim dockWindow As ESRI.ArcGIS.Framework.IDockableWindow
 Dim dockWinID As UID = New UIDClass()
 dockWinID.Value = My.ThisAddIn.IDs.pradDocWin
 dockwindow = My.ArcMap.DockableWindowManager.GetDockableWindow(dockWinID)
 While Not (layer Is Nothing)
 dockWindow.docwinlistbox.items.add(layer.Name)
 layer = e.Next
 End While
 dockWindow.Show(True)
 End Sub

The red section holds the problem line with docwinlistbox coming out as a null - the list box is called this on the form - name property and as I mentioned before the Modifiers=Public now..

Thanks

Stephen