How to get sender's value

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In debugging a fired event, I viewed the object sender in the Watch window

C#

void SelectAssetGraphic(object sender, SelectionChangedEventArgs e) {  }

Under the sender, I could see Sender's items, e.g. one of them is GraphicsLayer.ID (its value='phones'). In the Immediate Winder, when I entered
sender.GraphicsLayer.ID
The returning message liked that:
'object' does not contain a definition for 'GraphicsLayer' and no extension method 'GraphicsLayer' accepting a first argument of type 'object' could be found (are you missing a using directive or an assembly reference?
What's the approach to get the value from sender? Thanks.

Posted 27-Jan-15 8:14am

s yu

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Sergey Alexandrovich Kryukov 27-Jan-15 14:36pm

This post lacks context. You never mentioned any code containing GraphicsLayer and the like.
—SA

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BacchusBeale · Answer 1 · 2015-01-27T08:54:00

Solution 1

object sender needs to be cast to the object that produced the event e.g

C#

Button b = (Button)sender;

That is if you know what object it is, otherwise do something like this:

C#

if(sender is Button)
{
Button b = (Button)sender;
}

Posted 27-Jan-15 8:54am

BacchusBeale

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s yu 28-Jan-15 15:15pm

Bacchus Beale: Thanks for your response. Actually, I tried the approach you posted but it does not work. The sender's type is ESRI.ArcGIS.Client.Toolkit.FeatureDataGrid. In the Locals window, under the sender, there is an item: GraphicsLayer. However, no matter how to try, I can't retrieve sender.GraphicsLayer.ID value. Thanks again.