Web - How to add a new grid row inline instead of showing a DetailView after the New action is clicked

Hello Jorge,

Thank you for the clarification. In this case, you can handle the NewObjectAction.Executing event to cancel New Action executing and use the Access Grid Control Properties to access ASPxGridView and use the AddNewRow method.
Here is a code snippet for the ViewController:

C#
protected override void OnActivated() {  
    base.OnActivated();  
    Frame.GetController<NewObjectViewController>().NewObjectAction.Executing += new System.ComponentModel.CancelEventHandler(NewObjectAction_Executing);  
}  
void NewObjectAction_Executing(object sender, System.ComponentModel.CancelEventArgs e) {  
    e.Cancel = true;  
    ASPxGridListEditor listEditor = ((ListView)View).Editor as ASPxGridListEditor;  
    if(listEditor != null) listEditor.Grid.AddNewRow();  
}  

I have attached a video that illustrates this approach.

Update:

In newer versions, you can implement this on the client side to achieve better performance. Use the SupportClientScriptsExtensions.SetClientScript extension method to execute a custom script when the New action is clicked:

C#
using System;  
using DevExpress.ExpressApp;  
using DevExpress.ExpressApp.SystemModule;  
using DevExpress.ExpressApp.Actions;  
using DevExpress.ExpressApp.Web.Editors.ASPx;  
using DevExpress.Web;  

namespace MainDemo.Module.Web {  
    public class StartInlineEditingController : ViewController<ListView> {  
        public StartInlineEditingController() {  
            TargetViewNesting = Nesting.Nested;  
        }  
        protected override void OnViewControlsCreated() {  
            base.OnViewControlsCreated();  
            if (((IModelListViewNewItemRow)View.Model).NewItemRowPosition != NewItemRowPosition.None) {  
                ASPxGridListEditor gridListEditor = View.Editor as ASPxGridListEditor;  
                if (gridListEditor != null) {  
                    gridListEditor.Grid.Load += Grid_Load;  
                }  
            }  
        }  
        private void Grid_Load(object sender, EventArgs e) {  
            ASPxGridView gridView = (ASPxGridView)sender;  
            gridView.Load -= Grid_Load;  
            NewObjectViewController newObjectViewController = Frame.GetController<NewObjectViewController>();  
            if (newObjectViewController != null) {  
                newObjectViewController.NewObjectAction.SetClientScript(gridView.ClientID + ".AddNewRow();", false);  
            }  
        }  
    }  
}