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Many controls of same type using one common event in codebehind

Hi All,

  I would like to have multiple bottons on one ASPX form. As well, very similar activity would happen during the onclick event of the buttons. I am much too lazy to retype the same code for each of the onclick events. How can I use the same onlick event for all of my buttons and just pass a parameter to the onclick event?

  So, for example, I will have the following in the codebehind:
protected System.Web.UI.WebControls.Button Button1;
protected System.Web.UI.WebControls.Button Button2;
protected System.Web.UI.WebControls.Button Button3;

private void ButtonX_Click(object sender, System.EventArgs e)
{
   
   //send additional parameter value A, B, or C, depending on the button

    ......

   //call next function...

            
}

What code adjustments should I made?
TIA,
DoughBoy
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DoughBoy
Asked:
DoughBoy
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1 Solution
 
purpleblobCommented:
Not sure if this is what you want - if what you want is to have all buttons go to the same click event then create a Click event for one button then for each other button from the drop down (when you single click on the Click event for each button) simply choose the Click event you've already created.

Now within the event you can simply test the sender to see which button has been pressed and branch to the relevent code.

i.e.

if(sender == button1)
{
}
else if(sender == button2)

...

Hope this helps
0
 
DoughBoyAuthor Commented:
Hi purpleblob,

  Thanks for your suggestion, but I am hoping to avoid creating even multiple onclick events.

Regards,
DoughBoy
0
 
purpleblobCommented:
This requires only a single onclick method but handles the different functionality within the single onclick event thus

private void OnClick(object sender, System.EventArgs e)
{
   if(sender == button1)
   {
   }
   else if(sender == button2)
   ...
}

Therefore when you assignthe click event to a button you simply select this OnClick methid - thus all onclick's get routed to this single method.
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DoughBoyAuthor Commented:
ok, thanks. then what would the onclick call look like in the aspx page? <asp:button onclick=??? id=somebutton additionalparamter???=???>
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purpleblobCommented:
Well the onlick would be in the asp:button it'd be in code behind and thus bound in the InitializeComponent with regards the additonal parameter - surely you can simply do something like

private void OnClick(object sender, System.EventArgs e)
{
   string addtional = null;
   if(sender == button1)
   {
      additional = "do something"
   }
   else if(sender == button2)
   ...
}

Or you don't need the additional parameter because you know which button was pressed via the sender parameter so you should be able to make code decision due to this.
0

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