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ASP.NET MVC: ValidationSummary The ValidationSummary() extension method displays a summary of all validation errors on a web page as an unordered list element. It can also be used to display custom error messages.

ValidationSummary Properties It is used to set keyboard shortcut for the control. It is used to set background color of the control. It is used to set border color of the control. It is used to set font for the control text.

The validation summary tag helper targets the HTML div element, and is used to render a summary of form validation error messages. A ValidationSummary enumeration that specifies what validation errors to display. For more information on the various types of error (model or property), see the Validation topic.

The ValidationSummary control is used to display a summary of all the validation control error messages in a single control on web forms in asp.net. In other word we can say the validationSummary control is a summary of all the validation control error messages display on web forms.

The validation summary tag helper targets the HTML <div> element and is used to display the all of forms validation error messages at one place. Each error message is displayed in an unordered list. The asp-validation-summary tag helper is placed at the top of the form so as to display the error message.

A validation summary report (VSR) is a crucial document that summarizes the results and conclusions of the validation activities for a computer system. It demonstrates that the system meets its intended use and complies with the applicable regulations and standards.

You can summarize the error messages from a group of validators on a Web page by assigning the ValidationSummary control to a validation group by setting the ValidationGroup property. The summary can be displayed as a list, as a bulleted list, or as a single paragraph, based on the DisplayMode property.