A DevExpress validation summary, which is represented by the ASPxValidationSummary control, allows you to summarize validation errors from multiple controls and then displays them in a single block. This helps you to organize screen space more effectively if validation is required for several editors.
Three Render Modes
You can specify the manner in which validation error texts are presented within the ASPxValidationSummary's panel. They can be displayed as the following elements:
Showing Error Texts as Links
Validation error texts can also serve as links. In this case, clicking a link moves focus to the corresponding invalid editor.
Validate on Leave
You can force DevExpress editors be validated on the fly (on changing value), without the necessity of a validate request.