fields data during plugin update (pre-operation)

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  Hi a,

  Within the Pre-Operation Create step you need to look at the Target Image to see the values that are be sent to the database.

  Within the Pre-Operation Update step, you can still use the Target Image to see what values are being updated, but you must also use a registered 'PreEntityImage' to see the values that are already in the database.

  See: http://msdn.microsoft.com/en-us/library/gg309673.aspx

  hth,

  Scott

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  Scott Durow
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  • Proposed as answer by Sam - Inogic Friday, August 10, 2012 9:49 AM

  Friday, August 10, 2012 7:16 AM

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  hi, i did try your approach, i registered the preimage

  and i call it in the plugin by

           Entity pre = context.PostEntityImages["preroomrate"];
           throw new InvalidPluginExecutionException(((OptionSetValue)pre.Attributes["hello"]).Value.ToString());       

  i can receive the value of the field hello however the value is the one which still not updated. for example i changed hello from "you" to "world" so that the plugin is triggered, but the ((OptionSetValue)pre.Attributes["hello"]).Value.ToString() showed "you" but not "world"

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  a

  Tuesday, September 11, 2012 9:17 AM
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  Hi,

  The Target image will show what is being updates in the pipeline.

  Scott

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  Scott Durow
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  Tuesday, September 11, 2012 9:08 PM

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  i cannot say it is not correct

  however i still cannot achieve what i wanted

  by registering a pre-image

  i can read the target value as the modified value now in the pre-operation stage of plugin

  i can also read the previous value by using service.Retrieve.

  however i found that the target only contain the value that is begining modified by not included the other modified value

  for example. a, b ,c are modified, while a plugin is used to sum all of them up as a field value "d", thus the plugin will be triggered when a or b or c is updated

  scenario 1: (correct)

  a= 4   > =5 (update)

  b=4  > =4 (no update)

  c = 4  > =4 (no update)

  then d will be summed up correctly as 13

  scenario 1: (incorrect)

  a= 4   > =5 (update)

  b=4  > =5 (update)

  c = 4  > =5 (update)

  then d will be summed up incorrectly as 13, simply because i cannot the plugin session of "a is updated" doesn't contain the modfieid value of b and c

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  a

  Wednesday, September 19, 2012 7:04 AM
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  Hi,

  The PreImages and Target images are not dependant on each other. You will always be able to get the Target image to see what has been updated, but the PreImage you register will show you values before they were updated. To get the most recent values for a,b & c, you need to combine the PreImage and the Target, using the Target value if it exists, otherwise using the PreImage value. You shouldn't use a Retreive to get the values, but instead use the PreImage.

  hth,

  Scott

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  Scott Durow
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  Wednesday, September 19, 2012 1:54 PM

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  yes, but retrieve the modified value is only able to do in post-operation but not pre-operation of plugin pipeline stage.

  initially i intended to implement in pre operation as i dont want call one more update service only.

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  a

  Wednesday, October 17, 2012 7:37 AM
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  Hi,

  The Target entity will always contain the values being modified in the current pipeline - irrespective of stage. So you can access the modified values in the Pre-Operation.

  Scott

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  Scott Durow
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  • Marked as answer by verystupidguy Monday, October 22, 2012 6:41 AM

  Wednesday, October 17, 2012 7:42 AM

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