Microsoft Dynamics CRM (Archived)

How can we set lookup field as NULL in plugin.

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Posted on by Abhishek Bihani

255

Hello,

Can we set Look field as Null or empty to remove link between two entities using plugin in CRM 2013.

Trying this code but failed as Invalid Cast Exception.

caseEntity.Attributes[EntityAttributeConstants.CaseRelatedLog] = null;

service.Update(caseEntity);

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Guido Preite 54,086 Moderator on at

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EntityAttributeConstants.CaseRelatedLog is a string containing the EXACT logical name of the lookup field?

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Royal King 27,686 on at

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setting null value should clear lookup value. I would suggest checking the attribute name (lookup field attribute name in the case entity).

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Abhishek Bihani 255 on at

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Yes. it contains exact logical name.

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Royal King 27,686 on at

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When you go to case entity customization-> fields, does this attribute type shows as lookup? Also make sure attribute name is all in lower case letters.

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Guido Preite 54,086 Moderator on at

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then post the exact exception and the full code of this plugin (and also under which message it's triggered)

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Abhishek Bihani 255 on at

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Yes Chitra .. it is lookup type field & also attribute name is in small letters as well.

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Royal King 27,686 on at

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May be issue is caused by some other attribute value not with this lookup value. Like Guido mentioned post the plugin code may be that will help to direct to find an issue.

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Abhishek Bihani 255 on at

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Hi Chitra/Guido,

Below line of code I am using, on update of case entity.

EntityCollection entityCollection = GetCaseEntity(currentCaseEntity, service);

if (entityCollection != null)

{

if (entityCollection.Entities.Count > 0)

{

foreach (Entity caseEntity in entityCollection.Entities)

{

bool cancelRelatedLogs = caseEntity.Attributes.Contains("cancelrelatedlog_att") ? (bool)caseEntity["cancelrelatedlog_att"] : false;

if (cancelRelatedLogs == false)

{

caseEntity.Attributes["relatedlogid_att"] = null;

service.Update(caseEntity);

}

}

}

}

System.InvalidCastException: Microsoft Dynamics CRM has experienced an error. Reference number for administrators or support: #B495F49A

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Guido Preite 54,086 Moderator on at

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cancelrelatedlog_att and relatedlogid_att are not valid field names

or you post your REAL code (full) or we are not able to help you.

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Abhishek Bihani 255 on at

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Hi Guido,

It is valid field names(just without publisher as prefix) & real code as well.

please see my corrected field names.

cancelrelatedlog_att = wrg_cancelrelatedlog_att

relatedlogid_att = wrg_relatedlogid_att

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