Recently I change the FeatureLayer.DefinitionExpression(set FeatureLayer.DefinitionExpression="*****" then FeatureLayer.DefinitionExpression="") it will catch a exception with message "write protected memory. This usually indicates that other memory has been damaged" showed.
Thank you for the same and for my question
Thank you, Xiaoguang for reporting this bug.
I'm able to repro the issue that AccessViolationException is thrown when DefinitionExpression is cleared when LabelsEnabled is true in v100.
Fortunately, this is no longer reproducible in Update 1. However when using v100, to workaround this bug meanwhile, you can mark LabelsEnabled false if the new DefinitionExpression will be empty and set it back to true.
<SPAN class="keyword token">if</SPAN> <SPAN class="punctuation token">(</SPAN><SPAN class="keyword token">string</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="token function">IsNullOrEmpty</SPAN><SPAN class="punctuation token">(</SPAN>clause<SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">&&</SPAN> isLabelsEnabled<SPAN class="punctuation token">)</SPAN> layer<SPAN class="punctuation token">.</SPAN>LabelsEnabled <SPAN class="operator token">=</SPAN> <SPAN class="keyword token">false</SPAN><SPAN class="punctuation token">;</SPAN> layer<SPAN class="punctuation token">.</SPAN>DefinitionExpression <SPAN class="operator token">=</SPAN> clause<SPAN class="punctuation token">;</SPAN> <SPAN class="keyword token">if</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="keyword token">string</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="token function">IsNullOrEmpty</SPAN><SPAN class="punctuation token">(</SPAN>clause<SPAN class="punctuation token">)</SPAN><SPAN class="operator token">&&</SPAN> isLabelsEnabled<SPAN class="punctuation token">)</SPAN> layer<SPAN class="punctuation token">.</SPAN>LabelsEnabled <SPAN class="operator token">=</SPAN> <SPAN class="keyword token">true</SPAN><SPAN class="punctuation token">;</SPAN><SPAN class="line-numbers-rows"><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN></SPAN>
Are properties FeatureLayer.LabelsEnabled and FeatureLayer.DefinitionExpression conflicted?
Hi Jennifer
I noticed that when I set the property FeatureLayer.LabelsEnabled then update the definition expression will catch a exception, remove property FeatureLayer.LabelsEnabled codes go well, is the LabelsEnabled matters in update the definition expression
What version of the API are you using? I'm not able to reproduce with released version v100 with the following code.
To use, hit "Enter" key to execute update on FeatureLayer.DefinitionExpression, should only display states that begin with 'N'
Clearing the text and hit "Enter" again, should display all states.
I'm able to update the definition expression without issue.
Can you share some repro code or try code below to see if you can get the an exception? Thanks.
xmlns:esri="http://schemas.esri.com/arcgis/runtime/2013"> <SPAN class="token tag"><SPAN class="token tag"><SPAN class="punctuation token"><</SPAN>Grid</SPAN><SPAN class="punctuation token">></SPAN></SPAN> <SPAN class="token tag"><SPAN class="token tag"><SPAN class="punctuation token"><</SPAN><SPAN class="namespace token">esri:</SPAN>MapView</SPAN> <SPAN class="attr-name token"><SPAN class="namespace token">x:</SPAN>Name</SPAN><SPAN class="attr-value token"><SPAN class="punctuation token">=</SPAN><SPAN class="punctuation token">"</SPAN>MyMapView<SPAN class="punctuation token">"</SPAN></SPAN> <SPAN class="punctuation token">/></SPAN></SPAN> <SPAN class="token tag"><SPAN class="token tag"><SPAN class="punctuation token"><</SPAN>StackPanel</SPAN> <SPAN class="attr-name token">VerticalAlignment</SPAN><SPAN class="attr-value token"><SPAN class="punctuation token">=</SPAN><SPAN class="punctuation token">"</SPAN>Top<SPAN class="punctuation token">"</SPAN></SPAN> <SPAN class="attr-name token">HorizontalAlignment</SPAN><SPAN class="attr-value token"><SPAN class="punctuation token">=</SPAN><SPAN class="punctuation token">"</SPAN>Right<SPAN class="punctuation token">"</SPAN></SPAN><SPAN class="punctuation token">></SPAN></SPAN> <SPAN class="token tag"><SPAN class="token tag"><SPAN class="punctuation token"><</SPAN>TextBox</SPAN> <SPAN class="attr-name token">Text</SPAN><SPAN class="attr-value token"><SPAN class="punctuation token">=</SPAN><SPAN class="punctuation token">"</SPAN>STATE_NAME LIKE <SPAN class="punctuation token">'</SPAN>N%<SPAN class="punctuation token">'</SPAN><SPAN class="punctuation token">"</SPAN></SPAN> <SPAN class="attr-name token">Width</SPAN><SPAN class="attr-value token"><SPAN class="punctuation token">=</SPAN><SPAN class="punctuation token">"</SPAN>250<SPAN class="punctuation token">"</SPAN></SPAN> <SPAN class="attr-name token">KeyUp</SPAN><SPAN class="attr-value token"><SPAN class="punctuation token">=</SPAN><SPAN class="punctuation token">"</SPAN>OnKeyUp<SPAN class="punctuation token">"</SPAN></SPAN><SPAN class="punctuation token">/></SPAN></SPAN> <SPAN class="token tag"><SPAN class="token tag"><SPAN class="punctuation token"></</SPAN>StackPanel</SPAN><SPAN class="punctuation token">></SPAN></SPAN> <SPAN class="token tag"><SPAN class="token tag"><SPAN class="punctuation token"></</SPAN>Grid</SPAN><SPAN class="punctuation token">></SPAN></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 class="keyword token">public</SPAN> <SPAN class="token function">MainWindow</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN> <SPAN class="token function">InitializeComponent</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN> MyMapView<SPAN class="punctuation token">.</SPAN>Map <SPAN class="operator token">=</SPAN> <SPAN class="keyword token">new</SPAN> <SPAN class="token class-name">Map</SPAN><SPAN class="punctuation token">(</SPAN>Basemap<SPAN class="punctuation token">.</SPAN><SPAN class="token function">CreateTopographic</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN> MyMapView<SPAN class="punctuation token">.</SPAN>Map<SPAN class="punctuation token">.</SPAN>OperationalLayers<SPAN class="punctuation token">.</SPAN><SPAN class="token function">Add</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="keyword token">new</SPAN> <SPAN class="token class-name">FeatureLayer</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="keyword token">new</SPAN> <SPAN class="token class-name">Uri</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="string token"><SPAN>"</SPAN><A class="jive-link-external-small" href="https://community.esri.com/external-link.jspa?url=http%3A%2F%2Fsampleserver6.arcgisonline.com%2Farcgis%2Frest%2Fservices%2FCensus%2FMapServer%2F3" target="_blank">http://sampleserver6.arcgisonline.com/arcgis/rest/services/Census/MapServer/3</A><SPAN>"</SPAN></SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN> <SPAN class="punctuation token">}</SPAN> <SPAN class="keyword token">private</SPAN> <SPAN class="keyword token">void</SPAN> <SPAN class="token function">OnKeyUp</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="keyword token">object</SPAN> sender<SPAN class="punctuation token">,</SPAN> KeyEventArgs e<SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN> <SPAN class="keyword token">if</SPAN><SPAN class="punctuation token">(</SPAN>e<SPAN class="punctuation token">.</SPAN>Key <SPAN class="operator token">==</SPAN> Key<SPAN class="punctuation token">.</SPAN>Enter<SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN> <SPAN class="keyword token">var</SPAN> clause <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">(</SPAN>TextBox<SPAN class="punctuation token">)</SPAN>sender<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">.</SPAN>Text<SPAN class="punctuation token">.</SPAN><SPAN class="token function">Trim</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN> <SPAN class="keyword token">var</SPAN> layer <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">(</SPAN>FeatureLayer<SPAN class="punctuation token">)</SPAN>MyMapView<SPAN class="punctuation token">.</SPAN>Map<SPAN class="punctuation token">.</SPAN>OperationalLayers<SPAN class="punctuation token">[</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">;</SPAN> layer<SPAN class="punctuation token">.</SPAN>DefinitionExpression <SPAN class="operator token">=</SPAN> clause<SPAN class="punctuation token">;</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></SPAN></SPAN>
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