Validation textField

Question

IHelo, 
 I new in Appian, and, I need to validate that in a texfield, the user on type characters,, I mean (oaoa, mama, ect), NO number. 
 is there a special functions? 
 
 Could you hlp me please?

GopalK · Answer

Hi , You can use below expression for your validation parameter, let me know if it helps. 
 if(
 a!isNullOrEmpty(
 tointeger(ri!text)
 ),
 null,
 "Please enter characters only"
)

Sandhya · Answer

Hi Gopal, 
 I am checking for Duplicates. How to validate "Dell" and "dell"? Right now, the text field is accepting both the entries. 
 Thanks

GopalK · Answer

Hi Sandhya, Please see below code, basically it checks whether a value exists or not in the array irrespective case, here main idea is to convert both array and value in upper or lower case to make common case. 
 a!localVariables(
 /* list of suppliers */
 local!supplierList: { "Dell", "Lenovo", "Hp" },
 /* Checks whether provided value exists or not in the given array */
 contains(
 touniformstring(
 a!forEach(
 items: local!supplierList,
 expression: upper(fv!item)
 )
 ),
 upper("dell")
 )
) 
 Replace array and value according to your data.

Validation textField

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