Populate attribute value with the value of other fields in same feature service

Permanently deleted user

16 Juni 2016 19:02

I have an editable feature service for address points. The attributes included in this layer include fields for each address element individually as well as a field for the full address. I am trying to figure out a way, either by add new feature using feature template or creating a workflow, that the user can enter the values for address number, road name, prefix, etc and the field 'FullAddress' can be automatically populated by concatenating the inputs from the other fields. 

 

 I started a workflow where I queried to select a single address point and returned all fields. I then take that query result and do the following assign. 

 

         Value (InAgruement):

 

 query_result.Features(0).Attributes("PREADDRNUM,ADDRNUM,ADDRNUMSUF,FULLNAME,UNITTYPE,UNITID").ToString

 

          To (Out Arguement):

 

strFullAddr

 

Am I on the right track with this method? If so, how can I take the strFullAddr string and pass it into the field for "FULLADDR" in my feature service.

 

Thanks

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  Permanently deleted user

  16 Juni 2016 19:58

  Hi Lauren,

   

  If you want to concatenate a bunch of strings together, then you would have to split up your Value input to this:

   

  string.Format("{0}, {1}, {2}, {3}, {4}, {5}", query_result.Features(0).Attributes("PREADDRNUM"), query_result.Features(0).Attributes("ADDRNUM"), query_result.Features(0).Attributes("ADDRNUMSUF"), query_result.Features(0).Attributes("FULLNAME"), query_result.Features(0).Attributes("UNITTYPE"), query_result.Features(0).Attributes("UNITID"))

   

  The Attributes method does not take this many columns at once so it will error out.

   

  After you have generated the strFullAddr string, you can assign it to a feature by:

   

  1. Querying for the feature you want to add the full address to

   

  2. use an Assign activity to assign the new value to the feature like this: 

   

  To = featureSet.Features.First().Attributes("FULLADDR")

   

  Value = strFullAddr

   

  3. Then use the UpdateFeatures activity to commit the changes. 

   

  If you want more information, this code gallery sample demonstrates on how to update features:

   

  https://support.geocortex.com/essentialsGSCCodeGallery?sub-nav=codegall&main-nav=essentials&#!/feedtype=SINGLE_ARTICLE_DETAIL&criteria=BESTANSWERS&id=kA4600000004EWUCA2

   

  I hope this helps.

   

  Regards, 

   

  Carmen

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  Permanently deleted user

  20 Juni 2016 14:03

  Thank you, this helps a lot.

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  Permanently deleted user

  20 Juni 2016 22:13

  I got the concatenate to work and update the feature to commit the changes. Is there a way to account for fields that have a null value without adding a space in the concatenated string. For example, if the address does not have a suffix, I don't want a space to be added where that value would go. Any suggestions?

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  Tom Neer

  20 Juni 2016 22:21

  IF(fs.Feature(i).Attributes("fieldname") is Nothing,"",fs.Feature(i).Attributes("fieldname").ToString())

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  Permanently deleted user

  21 Juni 2016 12:54

  Hi Lauren, 

   

  I would do what Tom has suggested and include an IF activity per parameter to catch whether the value is NULL or empty. If you have 6 parameters, then you would have 6 IF activities. The condition would be something like this:

   

  query_result.Features(0).Attributes("PREADDRNUM").ToString.IsNullOrEmpty

   

  Then: leave this section empty and it would allow the workflow to just continue

   

  Else: Use an assign activity here where strFullAddr = strFullAddr + query_result.Features(0).Attributes("PREADDRNUM").ToString

   

  I hope this helps.

   

  Regards, 

   

  Carmen

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  Permanently deleted user

  21 Juni 2016 15:37

  I set up each of the 6 if statements as follows...

   

  Condition: query_result.Features(0).Attributes("ADDRNUM").ToString.IsNullOrEmpty

   

  Then: empty

   

  Else: Assign activity

   

          To: strFullAddr

   

          Value: strFullAddr + query_result.Features(0).Attributes("PREADDRNUM").ToString

   

  I am getting an error from my If statement that the "Object Reference is not set to instance of an object". I am having some trouble figuring out how to fix this. My initial thought was that is has something to do with the Attributes("ADDRNUM") portion of the condition?

   

   

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  Permanently deleted user

  21 Juni 2016 15:46

  Hi Lauren, 

   

  If that's the case then I would try replacing all your IF activities to using the TRY/CATCH activity. What that error means is we are trying to assign it a value that does not exist. So if the query_result.Features(0).Attributes("ADDRNUM") produces a NULL value, then we cannot convert it into a string to see if it is empty or not. That is what I think is causing the error. The try/catch activity would eliminate that issue. 

   

  Regards, 

   

  Carmen

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  Permanently deleted user

  21 Juni 2016 17:49

  Perfect, that makes sense. Thanks again.

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