Single line of text - Numerical characters only

Question

I have a single line of text column in my list called "Invoice Number" which only needs to contain numeric characters (0-9).

I have attempted using column validation with =ISNUMBER([Invoice Number]+0)

However using this formula still allows for the use of symbols. As long as there is at least 1 number in the text box it will allow you to save the item with the following symbols - . + £ $

everything I have found online suggests using the formula above but is there anyway to tweak this formula to prevent the use of these symbols?

Answer 1

Two solutions come to mind...

Check for the problem characters:

=AND(
     ISNUMBER(0+[Invoice Number]),
     ISERR(FIND("$",[Invoice Number])),
     ISERR(FIND(".",[Invoice Number])),
     ISERR(FIND(",",[Invoice Number]))
    )

If the invoice number is a known length, check for the valid characters. This checks the first four characters:

=NOT(OR(
        ISERR(FIND(MID([Invoice Number],1,1),"0123456789")),
        ISERR(FIND(MID([Invoice Number],2,1),"0123456789")),
        ISERR(FIND(MID([Invoice Number],2,1),"0123456789")),
        ISERR(FIND(MID([Invoice Number],4,1),"0123456789"))
     ))

Regular Expressions would be a real nice addition to SharePoint formulas!

Answer 2

Why haven't you used Number column? You can have min and max value set to 0 - 9 there. SharePoint will validate it by default.

Answer 3

Add this code to a Code Editor Web Part below the list form in your NewForm or EditForm:

[javascript]
<script type="text/javascript" src="/test/English/Javascript/jquery-1.4.2.min.js"></script>
<script type="text/javascript">
fields = init_fields_v2();

// Allow numbers only in text fields
// Array of FieldInternalNames to lilmit to numbers only
var arrToCheckForNum = [‘Title’,’Num’];
// Array of length of input string – set to 255 if you do not want to limit input length. Corresponds to the same array index in the "arrToCheckForNum"
var lengthOfInputNumber = [9,2];

$.each(arrToCheckForNum,function(idx,item){
$(fields[item]).find(‘input’).css({‘width’:’75px’});
$(fields[item]).find(‘input’).keyup(function(e){
var thisVal = $(this).val();
thisVal = thisVal.substring(0,lengthOfInputNumber[idx]);
$(this).val(thisVal.replace(/[^0-9]/g,”));
}).blur(function(){
var thisVal = $(this).val();
thisVal = thisVal.substring(0,lengthOfInputNumber[idx]);
$(this).val(thisVal.replace(/[^0-9]/g,”));
});
});

/*
LastMod: 07.05.2010
*/
function init_fields_v2(){
var res = {};
$("td.ms-formbody").each(function(){
var myMatch = $(this).html().match(/FieldName="(.+)"s+FieldInternalName="(.+)"s+FieldType="(.+)"s+/);
if(myMatch!=null){
// Display name
var disp = myMatch[1];
// FieldInternalName
var fin = myMatch[2];
// FieldType
var type = myMatch[3];
if(type==’SPFieldNote’){
if($(this).find(‘script’).length>0){
type=type+"_HTML";
}
}
if(type==’SPFieldLookup’){
if($(this).find(‘input’).length>0){
type=type+"_Input";
}
}
// Build object
res[fin] = this.parentNode;
res[fin].FieldDispName = disp;
res[fin].FieldType = type;
}
});
return res;
}
</script>
[/javascript]

The parameters “arrToCheckForNum” and “lengthOfInputNumber” must be changed depending on your needs.

The jQuery-library is found here. The pictures and the sourcecode refers to jquery-1.4.2.min. If you use another version, remember to update the script “src”.