动态创建的 Button, 怎么动态添加 OnClick 事件
这里无效, 怎么才能引用 CheckLogin 方法?
//smtButton.OnClick=this.CheckLogin;

如下:
public void CheckLogin(Object s, EventArgs e)
{

}

public void Login(PlaceHolder LoginPh)
{
Literal Br=new Literal();
Br.Text= " <br/> ";

Literal ltUsername=new Literal();
ltUsername.Text= "Username: ";

Literal ltPassword=new Literal();
ltPassword.Text= " <br/> Password: ";

TextBox Username=new TextBox();
Username.ID= "Username ";

TextBox Password=new TextBox();
Password.TextMode=TextBoxMode.Password;
Password.ID= "Password ";

Button smtButton=new Button();
smtButton.Text= "login now ";
//smtButton.OnClick=this.CheckLogin;

LoginPh.Controls.Add(ltUsername);
LoginPh.Controls.Add(Username);
LoginPh.Controls.Add(ltPassword);
LoginPh.Controls.Add(Password);
LoginPh.Controls.Add(Br);
LoginPh.Controls.Add(smtButton);
}

[解决办法]
vb.net

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim btn As New Button
btn.ID = "btn1 "
btn.Text = "btn1 "
form1.Controls.Add(btn)
AddHandler btn.Click, AddressOf btn1_Click
End Sub

Public Sub btn1_click(ByVal sender As Object, ByVal e As EventArgs)
For Each ctl As Control In form1.Controls
If (ctl.GetType Is GetType(System.Web.UI.WebControls.Button)) Then
If CType(ctl, Button).ID = "btn1 " Then
Response.Write(CType(ctl, Button).ID)
End If
End If
Next
End Sub
[解决办法]
this.smtButton.Click += new System.EventHandler(this.CheckLogin);