XMLEnhance the DataSet XML Schema
Listing 1. You can enhance the DataSet XML schema the VS.NET designer generates to declare validation constraints at the field, row, table, and DataSet levels. ![]() <?xml version="1.0" encoding="utf-8" ?> <xs:schema ... omitted > <xs:element name="CustomerOrders" msdata:IsDataSet="true" msprop:ruleassembly="BoOrders" <!-- DS level validation --> msprop:ruleclass="ValidationRules.CValidateDs"> <xs:complexType> <xs:choice maxOccurs="unbounded"> <xs:element name="Customers" msprop:ruleassemblyrow="BoOrders" <!-- Row level validation --> msprop:ruleclassrow= "ValidationRules.customerrowvalidate" msprop:ruleassemblytable= "BoOrders" <!-- Table level validation --> msprop:ruleclasstable= "ValidationRules.customertablevalidate"> <xs:complexType> <xs:sequence> <xs:element name="ShipName" type= "xs:string" minOccurs="0" msprop:ruleassembly="BoOrders" <!-- Field level validation --> msprop:ruleclass= "ValidationRules.shipnamefieldvalidate" /> <xs:element name="Email" type= "xs:string" minOccurs="0" <!-- Field level validation using regular expressions --> msprop:regexpconstraint= "\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*" /> <!-- simple field validation: field can't be null --> <xs:element name="CompanyName" type="xs:string" msprop:required= "true"/> ... /> |