| <?xml version="1.0" encoding="UTF-8"?> | 
| <ValidationRule xmlns="http://soap.sforce.com/2006/04/metadata"> | 
|     <fullName>DateCheck</fullName> | 
|     <active>true</active> | 
|     <description>验证发货日期是否为空</description> | 
|     <errorConditionFormula>ISPICKVAL(Order_type__c, '订单'  )&&  Deliver_date__c = null</errorConditionFormula> | 
|     <errorDisplayField>Deliver_date__c</errorDisplayField> | 
|     <errorMessage>请选择希望发货日期</errorMessage> | 
| </ValidationRule> |