Page. isvalid verify the verification control before determining whether the page is valid

Verify the verification control before determining whether the page is valid
If (page. isvalid)
Add:
Page. Validate ();

If the Code that is used to check whether the page is valid is not placed in the page_load method, but the click event processing of the submit button Program , and the causesvalidation of the submit button is not set to false (the default value is true), you can directly use page. isvalid to determine whether the page is valid, because the click event has automatically triggered the page. the Validate () method.