asp.net - 在 ASP.NET 中动态添加命令按钮

Question

我有一个带有动态创建的命令按钮的页面。

我需要动态连接一个单击事件，以便我可以获取所单击按钮的 CommandArgument。

Button b = new Button();
b.ID = "btnTrigger2";
b.CssClass = "hiddenBtn";
b.CommandName = "lbl3";
b.Click += new EventHandler(btnTrigger_Click);

问题是最后一行 - 我无法以这种方式连接 EventHandler - 我需要使用标准 EventArgs 而不是 CommandEventArgs。

有人对让它发挥作用有什么建议吗？一定有办法...

编辑

我想我会发布最终有效的代码，以防其他人尝试做同样的事情。

`字符串 tabLoadedScript = string.Empty; 字符串 postBackScript = string.Empty;

string script = " <script language='javascript' type='text/javascript'>" + System.Environment.NewLine;
script += "function clientActiveTabChanged(sender, args) {" + System.Environment.NewLine;


int i = 0;

foreach(TabPanel tp in tc1.Tabs)
    {
    Button b = new Button();
    b.ID = "btn" + tp.ClientID;
    b.CssClass = "hiddenBtn";
    b.CommandName = tp.ID;
    b.Command += btnTrigger_Click;
    this.form1.Controls.Add(b);
    AsyncPostBackTrigger trg = new AsyncPostBackTrigger();
    trg.ControlID = "btn" + tp.ClientID;

    tabLoadedScript += "var isTab" + tp.ClientID + "loaded=$get('" + tp.Controls[0].ClientID + "');" + System.Environment.NewLine;
    postBackScript += "if(!isTab" + tp.ClientID + "loaded && sender.get_activeTabIndex() == " + i + ") {" + System.Environment.NewLine;
    postBackScript += "__doPostBack('" + b.ClientID + "','');}" + System.Environment.NewLine;
    i++;
    }
script += tabLoadedScript;
script += postBackScript;
script += "}" + System.Environment.NewLine;
script += "</script>";

this.ClientScript.RegisterClientScriptBlock(this.GetType(), "cs", script, false);

protected void btnTrigger_Click(对象发送者, CommandEventArgs e) { 系统.Threading.Thread.Sleep(2500); 面板 ctrl = (面板) FindControlRecursive(this, "pnl"+ e.CommandName); ctrl.Visible = true; }

public static Control FindControlRecursive(Control Root, string Id)
    {

    if(Root.ID == Id)
        return Root;

    foreach(Control Ctl in Root.Controls)
        {

        Control FoundCtl = FindControlRecursive(Ctl, Id);
        if(FoundCtl != null)
        return FoundCtl;

        }
    return null;

    }

`

Answer 1

您仍然可以使用传递给点击处理程序的第一个参数来访问 CommandArgument。

类似于:

protected void btnTrigger_Click(object sender, EventArgs e)
{
  Button btnTrigger = sender as Button;
  String commandArgument = btnTrigger.CommandArgument;
  .
  .
  .
  .
  //Other code....

}