While there is no built-in methods to limit text input in this manner, you can use JavaScript-based solutions because our ASPxMemo control renders the regular HTML textarea element. So any solution applicable to this HTML element is also applicable to the ASPxMemo control. For example:
javascript - Limit number of lines in textarea and Display line count using jQuery - Stack Overflow
javascript - textarea with limited lines and char limits - Stack Overflow
The attached solution illustrates how to apply this logic to the ASPxMemo control.
See Also:
E4334 - How to set the text max length in the ASPxMemo control
E1424 - How to implement the "characters remaining" functionality for ASPxTextBox and ASPxMemo using MaxLength
javascript - Limit number of lines in textarea and Display line count using jQuery - Stack Overflow
javascript - textarea with limited lines and char limits - Stack Overflow
The attached solution illustrates how to apply this logic to the ASPxMemo control.
See Also:
E4334 - How to set the text max length in the ASPxMemo control
E1424 - How to implement the "characters remaining" functionality for ASPxTextBox and ASPxMemo using MaxLength