topic Re: How to display only selected features in a featureclass in C# in ArcObjects SDK Questions

How to display only selected features in a featureclass in C#

SreenivasaRaoPigili — Fri, 06 Jul 2012 01:42:00 GMT

Hi All,

    i have situation like, in one of my featureclass we have 100 features.
    Using queryfilter we have selected only 20 features from total 100 featrues

Currently i am seeing all 100 features with 20 selection.

   Now my problem is, i have to display only 20 features in map.

Thanks in advance.

Re: How to display only selected features in a featureclass in C#

AysberqTundra — Fri, 06 Jul 2012 03:48:33 GMT

Hello.

You can switch off symbol of layer from Symbol Selector -> Symbol Property Editor window. In this case all 100 features will not be shown. But the result of query filter will be shown.

Re: How to display only selected features in a featureclass in C#

SreenivasaRaoPigili — Fri, 06 Jul 2012 13:44:29 GMT

Hi ,

Thanks for your reply.
But I am working in ArcObjects using C#.

Can you please suggest in this regards.

Re: How to display only selected features in a featureclass in C#

KenBuja — Fri, 06 Jul 2012 14:01:20 GMT

Have you tried using an IFeatureLayerDefinition? This will display only the selected features as determined by a definition expression (which should be the same syntax as the whereclause in your queryfilter)

Re: How to display only selected features in a featureclass in C#

JamesCrandall — Fri, 06 Jul 2012 14:09:55 GMT

Use IFeaturelayerDefintion and set the .DefinitionExpression with your SQL

edit: oops sorry Ken, you were first!

Re: How to display only selected features in a featureclass in C#

SreenivasaRaoPigili — Wed, 11 Jul 2012 00:54:06 GMT

Hi,
   Thanks for your valuable suggestion.
   I have tried to use 'IFeatureLayerDefinition' in the below way.

                pFDef = (IFeatureLayerDefinition2)pFLayer2;
                pFDef.DefinitionExpression = "";
                pFDef.DefinitionExpression = "strColumn_Name='" + myObject.ToString() + "'";

                pActiveView = (IActiveView)pMap;
                pActiveView.Refresh();

But when i am running the code, in ArcMap I am getting ArcMap drawing error as "One or more layers failed to draw:"
Can you please suggest further.

Re: How to display only selected features in a featureclass in C#

KenBuja — Wed, 11 Jul 2012 12:19:39 GMT

There could be a couple of things at issue. Is 'strColumn_Name' the name of the field or a variable that hold the name of the field? If it's a variable, then you should use

pFDef.DefinitionExpression = strColumn_Name + "='" + myObject.ToString() + "'";

Is the field numeric instead of string? Then you would remove the single quotes from the string.

I would suggest comparing the DefinitionExpression value (use the debugging mode to see what it is exactly) with the expression that works properly in ArcMap

Re: How to display only selected features in a featureclass in C#

SreenivasaRaoPigili — Sat, 14 Jul 2012 10:37:14 GMT

Hi,
Thanks for your reply Ken. But I have crossed-check once again through debugging. I am getting the proper value into the DefinitionExpressioin.
Can anyone please share some sample code related to my problem.

Thanks.

Re: How to display only selected features in a featureclass in C#

SreenivasaRaoPigili — Thu, 19 Jul 2012 03:46:40 GMT

Hi All,
Thanks for your suggestions. Now it is working fine by using IFeatureLayerDefinition2.