How to compare Perfix Number By Compare Validator ?

Question

I have Numbers begin perfix numbers if you try to inserted these numbers should be copmare perfix this numbers is barcode for a certain items

Abdalla Elawad · Answer

H Manas : No understand this code or i can't applied it  please more explain thank you

Manas Mohapatra · Answer

I think you can use CustomValidator control to implement it: server id= txtSmallNumber /> server id= txtBigNumber /> CustomValidator1 runat= server ControlToValidate= txtSmallNumber ErrorMessage= pleases check the same value beween two textbox Height= 21px Width= 154px ClientValidationFunction= checkData >Please input The following is the javascript validation function : function checkData(sourceargs) { args.IsValid= false ; var value1=document.getElementById(   ).value; var value2=document.getElementById(   ).value; // Ignoring first character for prefix...you can change as per your need value1 = str.substr(1 value1.length); value2 = str.substr(1 value2.length); if (value1.toUpperCase()==value2.toUpperCase()) args.IsValid= true ; }