What exactly will contain and its use of object sender, EventArgs e as paramenter for Methods or Events

Posted by Girish578 under C# on 3/29/2010 | Views : 1982 | Status : [Member] | Replies : 2

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What exactly will contain and its use of object sender, EventArgs e as paramenter for Methods or Events ?

Please help me with an example in detail.

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Posted by: Raja on: 3/29/2010 [Member] Starter

0	To explain the answer of your question, take this example. Button <asp:Button id="btn" runat="Server" onclick="LoadData" /> Onclick Event protected void LoadData(object sender, EventArgs e) { // object - will be the button that fires this event // EventArgs - any arguments value can be accessed in to this method via CommandArguments property of the button } Hope this will help. Regards, Raja, USA Girish578, if this helps please login to Mark As Answer. \| Alert Moderator

To explain the answer of your question, take this example.

Button

<asp:Button id="btn" runat="Server" onclick="LoadData" />

Onclick Event

protected void LoadData(object sender, EventArgs e)

{

    // object -  will be the button that fires this event

    // EventArgs - any arguments value can be accessed in to this method via CommandArguments property of the button 

}

Hope this will help.

Regards,
Raja, USA

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Posted by: Sagarp on: 3/30/2010 [Member] Bronze

0	The EventArgs are arguments that the implementor of this event may find useful. With OnClick it contains nothing good, but in some events, like say in a GridView 'SelectedIndexChanged', it will contain the new index, or some other useful data. protected void btSomeButton_Click (object sender, EventArgs ea){ Button btnSomeButton = sender as Button; btnSomeButton.Text = "I was clicked!"; } Thanks SagarP http://www.emanonsolutions.net http://emanonsolutions.blogspot.com/ Girish578, if this helps please login to Mark As Answer. \| Alert Moderator

The EventArgs are arguments that the implementor of this event may find useful. With OnClick it contains nothing good, but in some events, like say in a GridView 'SelectedIndexChanged', it will contain the new index, or some other useful data.

protected void btSomeButton_Click (object sender, EventArgs ea){

   Button btnSomeButton = sender as Button;

   btnSomeButton.Text = "I was clicked!";

}

Thanks
SagarP
http://www.emanonsolutions.net
http://emanonsolutions.blogspot.com/

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