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Drag & Drop into a DockPane

AlexWie

Hello,

does anyone have a working example to drag a FeatureClass into a textbox on a DockPane so that the path appears in the textbox? The only drag and drop example is an Excel example that does not address a DockPane.

And in the documentation, a parameter of type DropData should be specified for the OnDrop function. Here, however, only a DropInfo object is possible ...?

public override void OnDrop(DropData dropInfo)     {       foreach (var item in dropInfo.Items)       {         if (System.IO.Path.GetExtension(item.Data as string) == ".aprx")           item.Handled = true;       }     }

And with the DropInfo object I get neither a reference to the text box, nor to the FeatureClass.

Thank you

Alex

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AbhijeetNandeshwar1

Hello @UmaHarano ,

Hope you are doing well.

First of all thank you for your insights regarding this problem. As you have mentioned in one of the post that

"Dragging from Contents pane is not yet supported using the public API. It will be available with 2.5 that is scheduled to be released in Jan 2020."

Is Public API for Dragging from Contents pane is available? If yes, Then could you please help me with the resources.

Thanks,

Abhijeet

Dragging from TOC.png

AlexWie

perfect. thanks

UmaHarano

Hi Alex,

I have attached a modified DragAndDrop sample that shows you how to drag and drop content from the Map's TOC.

To use the sample:

1. From the Add-In tab, click the Drag and Drop TOC Items button. A dockpane with a text box will show up.
2. Drag any layer(s) from the active map's TOC into the dockpane's text box..
3. The text box in the dockpane will list information about the map members being dragged and dropped.

Thanks

Uma

DragAndDrop.zip

AlexWie

Dear Uma,

is there maybe an example for the TOCDragData interface?

Thanks

Alex

AlexWie

Thank you! One last question. How can I get a reference to the controls (DataGrid, TextBox ...)? The TargetItem and VisualTargetItem Object return only null values.

Alex

UmaHarano

Hi Alex,

When you add the reference to Esri.ArcGIS.ItemIndex.dll, the Copy Local attribute needs to be set to "False". This will fix the issue you are experiencing.

Note: As a precaution, after you change this attribute, clean up your AssemblyCache folder in this location - C:\Users\UserName\AppData\Local\ESRI\ArcGISPro\AssemblyCache (One time only after this setting change).

Thanks

Uma

AlexWie

Unfortunately, when calling the ItemInfoValue method, the error occurs:

Method not found: ESRI.ArcGIS.ItemIndex.ItemInfoValue
ArcGIS.Desktop.Core.ClipboardItem.get_ItemInfoValue()

UmaHarano

Hi Alex,

Dockpanes support drag drop. This wiki page helps you implement drag and drop to dockpanes and to specific controls as such text boxes on the pane. ProGuide: DockPanes - Support drag and drop

Additionally, in your OnDrop override, here is the code snippet to use to access the feature class item being dropped:

<SPAN class="keyword token">public</SPAN> <SPAN class="keyword token">override</SPAN> <SPAN class="keyword token">void</SPAN> <SPAN class="token function">OnDrop</SPAN><SPAN class="punctuation token">(</SPAN>DropInfo dropInfo<SPAN class="punctuation token">)</SPAN>
   <SPAN class="punctuation token">{</SPAN>
      <SPAN class="comment token">//eg, if you are accessing a dropped file</SPAN>
      <SPAN class="keyword token">string</SPAN> filePath <SPAN class="operator token">=</SPAN> dropInfo<SPAN class="punctuation token">.</SPAN>Items<SPAN class="punctuation token">[</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">.</SPAN>Data<SPAN class="punctuation token">.</SPAN><SPAN class="token function">ToString</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
      <SPAN class="keyword token">string</SPAN> path <SPAN class="operator token">=</SPAN> <SPAN class="string token">""</SPAN><SPAN class="punctuation token">;</SPAN>
      <SPAN class="keyword token">if</SPAN> <SPAN class="punctuation token">(</SPAN>dropInfo<SPAN class="punctuation token">.</SPAN>Data <SPAN class="keyword token">is</SPAN> List<SPAN class="operator token"><</SPAN>ClipboardItem<SPAN class="operator token">></SPAN> clipboardItems<SPAN class="punctuation token">)</SPAN>
        <SPAN class="punctuation token">{</SPAN>             
           <SPAN class="keyword token">var</SPAN> thisItem <SPAN class="operator token">=</SPAN> clipboardItems<SPAN class="punctuation token">.</SPAN><SPAN class="token function">FirstOrDefault</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
           path <SPAN class="operator token">=</SPAN> thisItem<SPAN class="punctuation token">.</SPAN>ItemInfoValue<SPAN class="punctuation token">.</SPAN>catalogPath<SPAN class="punctuation token">;</SPAN> <SPAN class="comment token">//Use this at 2.3. Add reference to Esri.ArcGIS.ItemIndex.dll found in the bin folder of Pro installation location</SPAN>
           path <SPAN class="operator token">=</SPAN> thisItem<SPAN class="punctuation token">.</SPAN>CatalogPath<SPAN class="punctuation token">;</SPAN> <SPAN class="comment token">//At 2.4 use this instead.</SPAN>
           ArcGIS<SPAN class="punctuation token">.</SPAN>Desktop<SPAN class="punctuation token">.</SPAN>Framework<SPAN class="punctuation token">.</SPAN>Dialogs<SPAN class="punctuation token">.</SPAN>MessageBox<SPAN class="punctuation token">.</SPAN><SPAN class="token function">Show</SPAN><SPAN class="punctuation token">(</SPAN>$<SPAN class="string token">"Dropped {path} from Catalog"</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
       <SPAN class="punctuation token">}</SPAN>
       <SPAN class="comment token">//set to true if you handled the drop</SPAN>
       dropInfo<SPAN class="punctuation token">.</SPAN>Handled <SPAN class="operator token">=</SPAN> <SPAN class="keyword token">true</SPAN><SPAN class="punctuation token">;</SPAN>
<SPAN class="punctuation token">}</SPAN>‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍<SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

Thanks

Uma

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