[Solved] How and when to use IsContentValid?

[Alfa]

Hi,

In my application at the CurrentCellChange event , data is sent to Validation-Engine.

The Validation-Engine responses asynchronously.

So, i have to stop user from changing cell till i get the response back from engine.

There is no e.Cancel in CurrenetCellChanged event.

I thought of using IsContentValid of cell, I thought if I set it to true, the user will be locked in the cell.

Can you suggest something?

Rgds

Alfa.

[Nedyalko Nikolov]

Hello Alfa,

Unfortunately with the current version of RadGridView there is no way to use asynchronous validation. We will consider about some options in order to support such scenarios, but I cannot commit with any specific date. Meanwhile I can only suggest you to move validation logic to the UI level.

Greetings,
Nedyalko Nikolov
the Telerik team

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[Alfa]

Thanks Nedyalko,

I was not expecting inbuilt async validation support.

Can you help me out in few things

1) What is the use of IsContentValid?

2) Can I stop user from changing Cell? Is there any property like e.Cancel in CurrentCellChange?

3)Can I raise CellValidating event melodramatically?

Rgds

Alfa

[Pavel Pavlov]

Hello Alfa,

Here is some code which will keep the cell from changing :

public MainPage()
        {
            InitializeComponent();

            this.radGrid1.CellValidating += new EventHandler<Telerik.Windows.Controls.GridViewCellValidatingEventArgs>(radGrid1_CellValidating);
        }

        void radGrid1_CellValidating(object sender, Telerik.Windows.Controls.GridViewCellValidatingEventArgs e)
        {
            e.IsValid = false;
        }

Hope  you find it helpful.

Greetings,
Pavel Pavlov
the Telerik team

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[Alfa]

Thanks Pavel,

But all my question are still unanswered.

1) What is the use of IsContentValid?

2) Can I stop user from changing Cell? Is there any property like e.Cancel in CurrentCellChange?

    Are you guys planning to include e.Cancel in CurrentCellChange event?

3) Can I raise CellValidating event programmatically ?

Rgds

Alfa

[Pavel Pavlov]

Hello Alfa,

Straight to the answers:

1. IsContentValid is a property of the cell that controls the appearance of valid/invalid state of the cell. Setting this property would not affect any internal validation logic. It would affect only the visual appearance of the cell ( e.g. show hide invalid state visuals )

2. In my previous answer I have tried to demonstrate the most descent way of stopping the current cell from being changed

3. Unfortunately the CellValidating event is not intended to be used in this way ( e.g. being raised programmatically ) .

Regards,
Pavel Pavlov
the Telerik team

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[Alfa]

Thanks Pavel for straight answers.

If I do cell.CommitEdit(), will the CellValidating be raised? Is there any thing wrong in raising CellValidating in this way?

Rgds

Alfa

[Pavel Pavlov]

Hi Alfa,

Indeed calling CommitEdit would indirectly result in raising the cascade of validation logic - including the CellValidatingEvent. I believe there is nothing wrong in such approach .

Sincerely yours,
Pavel Pavlov
the Telerik team

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