Microsoft Dynamics CRM (Archived)

Plugin - Check if attribute is NULL or EMPTY

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Posted on by Community Member

Hello,

I have this plugin code for CRM 4 which checks if field is null or empty:

public static bool CrmNullOrEmpty<T>(T attribute) where T : class

{
bool isNull = true;

if (attribute!= null)
{
if (attribute is CrmDateTime )
{
CrmDateTime crmDateTime = attribute as CrmDateTime;
isNull = crmDateTime.IsNull || crmDateTime.IsNullSpecified;
}
else if (attribute is Picklist)
{
Picklist sPicklist = attribute as Picklist;
isNull = sPicklist.IsNull || sPicklist.IsNullSpecified;
}
else if (attribute is Key)
{
Key key= attribute as Key;
isNull = key.Value == Guid.Empty;
}
.....//all other types

}

return isNull;

}

Plugin

EntityReference primarycontact = (EntityReference)entity["primarycontactid"];

if (!CrmNullOrEmpty(primarycontact))
//do something

How would you do this in CRM 2011?

Thank you.

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Surmeet Singh 3,075 on at

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Hi MIHAILO,

In CRM 2011, you just have to use

if(entity.Contains("primarycontactid")==false)

This piece of code is sufficient to detect that field is empty in case of false.

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Community Member on at

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Hi Surmeet,

Thank you for your reply.

I am familiar with that approach, but I am trying to find a way to check if attribute is NULL without using Entity.

The reason is, I have lots of function where I only pass attributes, not the whole entities.

Thank you

Mihailo

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Verified answer

Surmeet Singh 3,075 on at

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Hi Mihailo,

You can then use

string n=entity.GetAttributeValue<string>("fieldname");

if(n==null)

{

//your operation

}

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Soma Shekar 461 on at

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if(entity.attributes.contains("primarycontactid"))

{

//do something

}

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Community Member on at

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This is probably the way to do it.

Thank you

Mihailo

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JackofallTrades 110 on at

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This helped me to check if (entity.Contains("new_account_id") == false). if (entity.Contains("new_account_id") != null) does not work.

Thank you Mr Singh.

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Community Member on at

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Hi Jack

Entity accountentity = service.Retrieve("account", accountId, new ColumnSet(true));

if (accountentity.Attributes.Contains("new_account_id")&& accountentity.Attributes["new_account_id"]!=null)

{

}

Thanks

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