Regarding Text Concat

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I'm a newbie to Mendix and I trying to achieve below condition, help me in setting it in a right way. I have four Text field like below, and each field has limitation to max 4 characters how can I concate them and add it as single value into a single Attribute. 
asked
2 answers
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Hi Selvakumar,

 

1.Create a new variable 

2.For concat use below expression

“trim($EntityName/Value1) + ' ' + trim($$EntityName/Value2)”

3.Assignee new value to new variable

answered
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For members referring this in future, please don’t add “” it may show you error.

 

Add your Action value just like below:

trim($Entity/Text1)+''+trim($Entity/Text2)+''+trim($Entity/Text3)+''+trim($Entity/Text4)

answered