Pass variable with onclick method in asp.net

Question

I create a button dynamically and I want when my button click and onclick event fired, a variable pass with this event.

Button btn = new Button();
btn.Click += new EventHandler(Button_Click);
//btn.Click += new EventHandler(Button_Click(32)); <-- I want something like this
divUserUploadedList.Controls.Add(btn);

And this is Onclick event:

protected void Button_Click(object sender, EventArgs e)
{
    //I want to access that value here
}

where does the value come from? Does it come from user input, or is it constant value - does the value ever change? — user1666620
– user1666620, Commented May 20, 2015 at 11:25
You can subscribe to an event, you cannot pass arguments. Why 32? — Tim Schmelter
– Tim Schmelter, Commented May 20, 2015 at 11:26
@user1666620 This value is id of a row from a table and yes its change — Hossein Rashno
– Hossein Rashno, Commented May 20, 2015 at 11:29
@TimSchmelter 32 is just example, Its id of some rows from a table. These buttons already have an event and they can successfully fire that event — Hossein Rashno
– Hossein Rashno, Commented May 20, 2015 at 11:31
you can do this through button's CommanArgument property. — Mirza Danish Baig
– Mirza Danish Baig, Commented May 20, 2015 at 11:31

Mirza Danish Baig · Accepted Answer · 2015-05-20 11:32:39Z

3

You can do this by using CommandArgument property

protected void Page_Load(object sender, EventArgs e)
        {
            Button btn = new Button();
            btn.Click += btn_Click;
            btn.CommandArgument = "12"; //<-- you can pass argument like this
            divUserUploadedList.Controls.Add(btn);

        }

        void btn_Click(object sender, EventArgs e)
        {
            Button btn = sender as Button;
            string value = btn.CommandArgument;
        }

answered May 20, 2015 at 11:32

Mirza Danish Baig

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1 Comment

Hossein Rashno Over a year ago

Yes tnx, That's what I need

Ashutosh Vyas · Accepted Answer · 2015-05-20 11:31:40Z

2

What you are looking for is probably the CommandArgument property.

https://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.button.commandargument%28v=vs.110%29.aspx

answered May 20, 2015 at 11:31

Ashutosh Vyas

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