How do I just refresh one feature layer using PartialRefresh

LimingWu

Hello,

I'm creating an ArcMap add-in for dynamically updating a feature layer. My map have many other layers. Every time I call ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeography, myFeatureLayer, null), all other layers are refreshed as well. How can I just refresh my layer? Thanks.

Hornbydd

If you look at the help file for IActiveView it is fairly clear that you need to ensure that the individual layers have their cached property set to True for partial refresh to take affect. Below is some VBA code to show you how to set this:

Public Sub <SPAN class="token function">test</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN>
 Dim pMXDocument As IpMXDocumentocument
 Set pMXDocument <SPAN class="operator token">=</SPAN> ThisDocument
 
 Dim pMap As IMap
 Set pMap <SPAN class="operator token">=</SPAN> pMXDocument<SPAN class="punctuation token">.</SPAN>FocusMap
 
 Dim pLayer As ILayer
 Set pLayer <SPAN class="operator token">=</SPAN> pMap<SPAN class="punctuation token">.</SPAN><SPAN class="token function">Layer</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">)</SPAN>
 
 Dim pActiveView As IActiveView
 Set pActiveView <SPAN class="operator token">=</SPAN> pMXDocument<SPAN class="punctuation token">.</SPAN>ActiveView
 
 ' whole screen refreshes
 pActiveView<SPAN class="punctuation token">.</SPAN>PartialRefresh esriViewGeography<SPAN class="punctuation token">,</SPAN> pLayer<SPAN class="punctuation token">,</SPAN> Nothing
MsgBox <SPAN class="string token">"now cached refresh"</SPAN>
 
 ' Ensure individual layer <SPAN class="keyword token">is</SPAN> cashed
 pLayer<SPAN class="punctuation token">.</SPAN>Cached <SPAN class="operator token">=</SPAN> True
 pActiveView<SPAN class="punctuation token">.</SPAN>PartialRefresh esriViewGeography<SPAN class="punctuation token">,</SPAN> pLayer<SPAN class="punctuation token">,</SPAN> Nothing
End Sub‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍<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>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

As a side note questions related to ArcObjects should be tagged as ArcObjects or posted in the ArcObjects SDK, you are more likely to capture the attention of the right sort of person.