ASP. NET validation control

The benefits of the ASP. NET validation control: 1, the client server side will be verified at the same time. 2, simplify the check logic.

1,requiredfieldvalidator: non-null check

InitialValue: Default value. Cannot pass validation when the value of the control is equal to the default value. Text: Displays the error message.
Controltovalidat: Associates a control that requires validation.
2,rangevalidator: Between the given maximum and minimum values. Type: The type of data that needs to be validated.
MaximumValue: Maximum value.
MinimumValue: Minimum value. Non-null checks are not performed. If you want to make a non-null check, add the RequiredFieldValidator control 3,comparevalidator: To compare whether the relationship between two values satisfies or is a specified type of data. Type: The type of data that needs to be validated. Operator The property value of the comparison operator:

• DataTypeCheck: Comparing data is not this type.
• Equal: equals this value.
• GreaterThan: Greater than this value.
• Greaterthanequl: greater than or equal.
• LessThan: Less than.
• Lessthanequal: Less than equals.
• NotEqual: Not equal to.

ValueToCompare: Compare to which value ControlToCompare: compare to the value of another control. 4,regularexpressionvalidator: Verifies whether the data conforms to the regular expression. Validationexpression:[email protected]+5,customvalidator: Custom validation. Service-Side code:

protected void CustomValidator1_ServerValidate (object source, ServerValidateEventArgs args)        {            int month = Convert.ToInt32 (txtmonth.text);            int day = Convert.ToInt32 (txtday.text);            int[] Data ={            --------------------------------- int days = data[month-1];            Args. Isvalid= (Day <= days && Day >= 1);                    }

　　

Client code:

    <script type= "Text/javascript" >        function Dayvaild (src,args) {            var txtmonth = document.getElementById (" <%=txtmonth.clientid%> ");            var month = parseint (Txtmonth.value, ten)            var day = parseint (Args.value, ten)            var data = [31, 29, 31, 30, 31, 30, 31            ,------ var days = data[month-1];            Args. IsValid = (Day <= days && Day >= 1);        }    </script>