如何在PreSaveAction中实现多个SharePoint表单验证

Question

So first, I know nothing about Javascript other than what I find on the web.

I have a SharePoint form and I'm trying to implement specific validations when a user presses "Save."

These are:

1. Two specific fields of the form can't be the same value.
2. The dropdown list value (which is a lookup column) cannot say "Select from list" which is the default option.

There's already a PreSaveAction that prevents it from being saved if there are no documents attached, which works perfectly.

However, when I try to add one of the additional validations (again based on what I find on the web) under the PreSaveAction , none of them work.

I have the form element names, but can't seem to get it to work.

Edit based on comment: The latest code I tried is:

<script type="text/javascript" language="javascript">

function PreSaveAction() {
if (document.getElementById('idAttachmentsRow').style.display=='none' )
 {
 alert('Please attach supporting documents.');
 return false ;
}
else {  return true;  }
}

   {
     if($("select[title='Vendor & Co Code'] option:selected").val() == '~Select Vendor from List')
     {
        alert("Please select vendor.")
        return false;
     }
    else
    {
    return true;
    }

  }

The document attachment part works on it own, but when I added the later, neither worked.

Answer 1

Your function is not not correct.

Try script below.

<script type="text/javascript">
        function PreSaveAction() {
            if (document.getElementById('idAttachmentsRow').style.display=='none' )
            {
                alert('Please attach supporting documents.');
                return false ;
            }
            if ($("select[title='Vendor & Co Code'] option:selected").val() == '~Select Vendor from List') {
                alert("Please select vendor.")
                return false;
            }
            else {
                return true;
            }
        }
    </script>