Adding to detail grid ... how to obtain Parent model for use with detail grid new model?

[Rob]

Couple of questions:

1.  When working Add command for a detail templated grid, the args parameter doesn't provide for the parent model so there is no way to quickly determine values needed from the parent that will populate the child/detail (like primary key values on a composite key).  I guess I can manually track "current parent row" via OnRowClick but that seems a bit tedious?  Surely there is an easier approach?  I was expecting the OnCreate for detail grid to provide parent object/model as part of the event parameters, but that doesn't seem to be the case.

2.  When working EditMode=InCell on a detail grid, my expectations was that when I click on an empty grid it would automatically put me into EditMode (Add) for a new detail row, but that doesn't seem to be the case?  I have to go thru the OnCreate (which doesn't provide for parent model).

I was reading thru your documentation here and here but they weren't useful for is a real world scenario as none of the examples show "Add" case on a detail item that relies on a parent key value to build a composite key when the data is actually saved to a database.

Any clean suggestions other than tracking "current parent row" via OnRowClick?

Rob.

[Hristian Stefanov]

Hi Rob,

Accessing Parent Model in Detail Grid

The following article shows how you can use data from the parent grid while editing a child grid: Hierarchy Editing.

Automatically Entering EditMode in Empty Detail Grid

For EditMode=InCell, where you want the grid to automatically enter edit mode when it's empty, you can achieve this by programmatically adding a new row when the grid is detected to be empty. Detect when the detail grid is empty and trigger the addition of a new row. You can handle this logic in the OnRead event or when rendering the grid.

Here's a basic example:

@code {
    private bool IsDetailGridEmpty = true; // Flag to check if the grid is empty

    private void OnReadHandler()
    {
        if (IsDetailGridEmpty)
        {
            // Logic to add a new row
            AddNewDetailRow();
        }
    }

    private void AddNewDetailRow()
    {
        // Add a new row to the detail grid's data source
    }
}

This method provides control over when a new row is added, facilitating automatic entry into edit mode.

Regards,
Hristian Stefanov
Progress Telerik

[Rob]

Hi Hristian,

Worked perfectly, thank you!

Rob