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Using Property Grid in C#
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lpereira View Drop Down
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Joined: 21 February 2005
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Points: 2 		Post Options Post Options   Thanks (0) Thanks(0)   Quote lpereira Quote  Post ReplyReply Direct Link To This Post Topic: Using Property Grid in C#
    Posted: 21 February 2005 at 4:52pm

I am using the property grid in a c#application. I need to be able to validate data that a user enters for a propertygrid item and then notify the user if its invalid data. I added the valuechanged event to my code, however there is no way to identify which item was the one modified. Is there a way to do this?

Thanks.
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Boyd View Drop Down
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Points: 285 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Boyd Quote  Post ReplyReply Direct Link To This Post Posted: 21 February 2005 at 6:39pm
I don't have the documents in front of me right now, but I believe the EventArgs for the 'ValueChanged' event will include a reference to the item that was modified.
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ianp View Drop Down
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Points: 119 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ianp Quote  Post ReplyReply Direct Link To This Post Posted: 22 February 2005 at 3:27am

The ValueChanged event in VB6 should be:

Private Sub PropertyGrid1_ValueChanged(ByVal Item As XtremePropertyGrid.IPropertyGridItem)


End Sub
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Boyd View Drop Down
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Points: 285 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Boyd Quote  Post ReplyReply Direct Link To This Post Posted: 22 February 2005 at 12:18pm

I finally got back in front of a PC with Codejock installed, so here's an update about detecting a value change in C#.

Indeed, the 'item' that was changed is exposed in the event args.  An event handler might look like the following:

private void axPropertyGrid_ValueChanged(object sender, AxXtremePropertyGrid._DPropertyGridEvents_ValueChangedEvent e)
{
    Console.WriteLine("Value Changed for " + e.item.Caption);
}



Edited by Boyd
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bluelizard View Drop Down
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Points: 2 		Post Options Post Options   Thanks (0) Thanks(0)   Quote bluelizard Quote  Post ReplyReply Direct Link To This Post Posted: 24 March 2005 at 4:14pm
I'm using PropertyGrid in C# too.  The main problem with the ValueChanged event, as currently implemented, is that it's not that easy to find out what the value was before it was edited, so that if the data entered is invalid, you can set it back.  My hack around it is to store the current data value in the Tag property, and upon validation, change the value of the Tag property, otherwise reset the value back to what's in the Tag property.  Kinda hackish, but whatever works.

BlueLizard
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