Month: February 2017

Hi,

Whenever i tried using query expression for retrieve multiple operations, came to know some interesting facts which exists and hence would like to share with you all.

As you already know Query expression was used when dealing with a little complex query, lets see this in action

Basic query expression example

//  Query using ConditionExpression and FilterExpression
ConditionExpression condition1 = new ConditionExpression();
condition1.AttributeName = "lastname";
condition1.Operator = ConditionOperator.Equal;
condition1.Values.Add("Brown");            

FilterExpression filter1 = new FilterExpression();
filter1.Conditions.Add(condition1);

QueryExpression query = new QueryExpression("contact");
query.ColumnSet.AddColumns("firstname", "lastname");
query.Criteria.AddFilter(filter1);
query.NoLock = true;//Condition to prevent occurrence of deadlocks, distinct was 
used to retrieve unique columnsets in the query

EntityCollection result1 = _serviceProxy.RetrieveMultiple(query);

Reference: https://msdn.microsoft.com/en-us/library/microsoft.xrm.sdk.query.queryexpression.aspx 

https://mscrmmindfire.wordpress.com/2013/11/26/avoiding-deadlock-in-plugins/

http://www.resultondemand.nl/support/sdk/f5d2195b-8cae-49d6-a493-6f8b92e7f54e.htm

Hope this helps some one…