I have A|B|C|D.....|Z link buttons on web forms . Now i have to add single event in code behind to handles all link buttons. How to do with C# asp.net
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3 Answers
If you didn't mean on dynamicaly setting events, you just set the same ethod in OnClick event for all buttons:
<asp:LinkButton id="btnA" Text="A" runat="server" OnClick="myMethod" />
<asp:LinkButton id="btnB" Text="B" runat="server" OnClick="myMethod" />
in code behind:
potected void myMethod(object sender, EventArgs e)
{
....
}
This should work...
Also, instead of OnClick, you could set CommandName and additionaly set CommandArgument for each LinkButton, to pass different parameters. Then, in code behind method signature, you should set CommandEventArgs instead of EventArgs.
3 Comments
nirav patel
But how to find which button is pressed?
Goran
I have just edited my answer, I think you should find the answer in using CommandName and set CommandArguments for each button.
pStan
This worked great. I just had to convert the code to VB since the customer is using that for everything. Also I used the link button text to determine what was clicked like so: Dim LetterSelected as String = Directcast(sender, LinkButton).Text.ToString().Trim()
Associate the eventhandler of these Buttons or LinkButtons at Page_Init and check the sender control that made the request.
protected void Page_Init()
{
LinkButton1.Click += Link_Click;
LinkButton2.Click += Link_Click;
LinkButton3.Click += Link_Click;
LinkButton4.Click += Link_Click;
}
cast the control according to your postback enabled controls either it is button or linkbutton and check for some control perperty of that control to identify that control.
private void Link_Click(object sender, EventArgs e)
{
LinkButton button = sender as LinkButton;
if (button.Text == "LinkButton1")
{
Response.Write("<script>alert('link1');</script>");
}
else if (button.Text == "LinkButton2")
{
Response.Write("<script>alert('link2');</script>");
}
}
you can check for the control as:
Button button = (Button)sender;
if(button is Button1)
{
..
}
Comments
Use like :
button1.Click += new EventHandler(Button_Click);
button2.Click += new EventHandler(Button_Click);
button3.Click += new EventHandler(Button_Click);
......
That would subscribe all the events to the single event handler. You can get which button has been clicked on event handler :-
private void Button_Click(object sender, System.EventArgs e)
{
Button b = (Button) sender;
Label1.Text = b.ID;
}
2 Comments
nirav patel
i have implemented in my code. But handler event is not called when click on particular button..
nirav patel
button1.Click += new System.EventHandler(this.someEventHandler); button2.Click += new System.EventHandler(this.someEventHandler); button3.Click += new System.EventHandler(this.someEventHandler); should be put into Page_Init() method then it's works..Thanks