Web Forms Validation
ASP.NET Web Forms - Validation Server Control
Validation server control is used to validate user input.
Validation Server Control
Validation Server Control is used to validate the data of the input control. If the data fails validation, an error message is displayed to the user.
The syntax for creating a Validation server control is:
<asp:control_name id="some_id" runat="server" />
| Validation Server Control | Description |
|---|---|
| CompareValidator | Compare the value of one input control with another Compare the value of the input control or a fixed value |
| CustomValidator | Allows you to write a method to handle the validation of the input value |
| RangeValidator | Checks whether the user input value is between two values |
| RegularExpressionValidator | Ensures that the value of the input control matches the specified Pattern |
| RequiredFieldValidator | Make the input control a required (required) field |
| ValidationSummary | Shows a report of all validation errors in a web page |
