如何在C＃中使用点击处理以编程方式在C＃中创建asp：button

Question

i write this code after many search but is not working
i need to create as asp:button programmatically and handling it

for(int i=0;i<DtShow.Rows.Count;i++)
        {
            Button btn = new Button
            {
                Text = "حذف",
                ID = i.ToString(),
                UseSubmitBehavior = false,
                CommandArgument =i.ToString(),
                CssClass = "btn btn-danger"
            };
            btn.Click +=new EventHandler(this.btn_Click);
            lstAccessDgv.Rows[i].Cells[2].Controls.Add(btn);
        }
 protected void btn_Click(object sender, EventArgs e)
    {
        Button b = (Button)sender;
        int id = Convert.ToInt32(b.ID);
        DtCode.Rows.RemoveAt(id);
        DtShow.Rows.RemoveAt(id);
        lstAccessDgv.Rows[id].Visible = false;
    }

why not call btn_Click?

Answer 1

Unfortunately your question doesn't make it clear what information you're looking for, however, since you did make a specific query, I'll address that.

why not call btn_Click?

Because the btn_Click event handler hasn't been bound to the button's click event.

That's why you need to do this when you create the button:

btn.Click +=new EventHandler(this.btn_Click);

This executes btn_Click when the button is clicked.

A thing to keep in mind, though, is that this function will execute for every button in the list so you need to make sure it does work that specifically relates to the list item to which the button belongs.