CRM Dynamics 2013 JavaScript Validate Minimum characters in free text field

Question

I have a simple validation that I need to perform on the form where it forces the user to have a minimum amount of character in a field, I have the below code as follows, but it does not work, I tried it on load and on save event but no luck, please assist.

function TemsAndCondtitionsValidation()
{
 var TermsandCon = Xrm.Page.getAttribute("new_termsconditions").getValue();
 if(TermsandCon.value.length < 140)
  {
    Xrm.Utility.alertDialog("The length of characters entered are less than the minimum requirement of 140 characters");
  }

}

Answer 1

如果new_termsconditions是text类型（单行或多行），则可以像下面这样简单地修复代码：

if(TermsandCon.length < 140)

Answer 2

Use the form editor to attach this function to your onsave event:

function TemsAndCondtitionsValidation(context)
{
    var termsConds = Xrm.Page.getAttribute("new_termsconditions").getValue();
    if(termsConds.length < 140)   {
        Xrm.Utility.alertDialog("The length of characters entered are less than the minimum requirement of 140 characters");
        context.getEventArgs().preventDefault(); // cancel save
    }
}