Question

我正在使用C＃开发一个asp.net应用程序。我创建了一个.aspx页面，并在页面的不同位置放置了四个按钮。在服务器端，我想只为所有四个按钮使用一次点击事件。

这是我的代码：

aspx页面

<asp:Button ID="Button1" runat="server" CommandArgument="Button1" onClick = "allbuttons_Click" />
<asp:Button ID="Button2" runat="server" CommandArgument="Button2" onClick = "allbuttons_Click" />
<asp:Button ID="Button3" runat="server" CommandArgument="Button3" onClick = "allbuttons_Click" />
<asp:Button ID="Button4" runat="server" CommandArgument="Button4" onClick = "allbuttons_Click" />

cs page

protected void allbuttons_Click(object sender, EventArgs e)
{
    //Here i want to know which button is pressed
    //e.CommandArgument gives an error
}

Answer 1

@Tejs的评论是正确的，看起来你想要这样的东西：

protected void allbuttons_Click(object sender, EventArgs e)
{
    var argument = ((Button)sender).CommandArgument;
}

Answer 2

使用

OnCommand =

和

protected void allbuttons_Click(object sender, CommandEventArgs e) { }

Answer 3

实际上，您根本不需要传递CommandArgument来知道您按下了哪个按钮。您可以获得如下按钮的ID：

string id = ((Button)sender).ID;

Answer 4

您可以按如下方式将命令文本分配给按钮：

protected void allbuttons_Click(Object sender, CommandEventArgs e) {
    switch(e.CommandName) {
        case "Button1":
            Message.Text = "You clicked the First button";
            break;
        case "Button2":
            Message.Text = "You clicked the Second button";
            break;
        case "Button3":
            Message.Text = "You clicked Third button";
            break;
        case "Button4":
            Message.Text ="You clicked Fourth button";
            break;
    }
}

e.CommandArgument for asp按钮不起作用

4 个答案: