Encapsulation and application of data verification part in ASP.NET

Our business system involves a lot of form editing and verification. The simplest way is to use the data verification control that comes with asp.net, but this has the following three problems:

1. The verification control must be included in the design Adding it to the form and manually setting attributes such as data type, error message, etc. is quite cumbersome.

2 For an input box, we may have to check multiple items, such as: required, must be in date format, and must be greater than 2007-1-1. This requires adding multiple validation controls.

3 Business rules and forms are bound together, which is not conducive to maintenance and reuse.

The verification functions we hope for are:

1. The verification rules are separated from the form. Just draw the input box on the form. The verification control will be dynamically created according to the configuration file at runtime.

2 According to the verification rules, a default prompt message is generated: cannot be empty, wrong number type, must be between 1 and 100.

3 Flexible validation rule expressions: such as: range(1, 200), >=0.5, Mail(), Mobile(). Currently, conditions such as and, or are not

supported

For this reason, we have encapsulated this part of the function. When using it, you only need to

set the following in the xml file: control name, data type, whether it is required, and verification expression information.

Here is a quote:
<ValidateInfo>
<ControlName>Quantity of outlets</ControlName>
<DataType>Integer</DataType>
<Require>true</Require>
<Expression>range(1, 100)</Expression>
</ValidateInfo>

In the Page_Init event of the page, call the class method:
ValidateHelper.LoadFromFile("data verification_configuration.xml") can be used.

Class design:
//Configuration information class
classValidateInfo
{
public string ControlName;
public ValidationDataType DataType;
public string ErrorMessage;
public bool Require;
public string Expression;
}

//Validation control creation factory
public class ValidatorFactory
{
CreateRequiredFieldValidator();
CreateDateTypeCheckValidator();
CreateRangeValidator(string min, string max);
CreateCompareValidator(ValidationCompareOperator oper, string valueToCompare);
...
}

// Verification rule parser, creates verification controls based on configuration information
public class ValidatorParser
{
Parse(ValidateInfo info, ValidatorFactory factory);
...
}

// Read the configuration information and bind the verification control to the form
public class ValidateHelper
{
LoadFromFile(Page page, string fileName)
}