The DevExpress ASP.NET Form Layout (ASPxFormLayout) control allows you to build adaptive edit forms with ease. The Form Layout can collapse its content from several to one column. To enable this functionality, set the AdaptivityMode property to SingleColumnWindowLimit.
When adaptive mode is enabled, the Form Layout control automatically changes its layout when the browser window is resized. When the browser window inner width is less than or equal to the value specified by the SwitchToSingleColumnAtWindowInnerWidth property, control content is reordered into one column. The editor captions are displayed above or below the editor (based on the initial position).
The Form Layout adaptivity settings can be accessed by the SettingsAdaptivity property.
In this demo, the Form Layout control displays its editors in one column when the browser window width is less than 800 pixels.