怎样调用一个 动态创建的用户自定义控件 里的某个方法或事件?
怎样调用一个 动态创建的用户自定义控件 里的某个方法或事件?
protected void Page_Load(object sender, EventArgs e)
{
var a = LoadControl("001.ascx");
a.ID = "UC001";
this.Controls.Add(a);
}
protected void Button1_Click(object sender, EventArgs e)
{
var a = this.FindControl("UC001"); //这里竟然为null
想在这里调用PageLoad事件里创建的自定义控件001.ascx中的方法或者事件应该怎么做?
}
[解决办法]
- C# code
protected override void OnInit(EventArgs e) { var a = LoadControl("001.ascx"); a.ID = "UC001"; form1.Controls.Add(tb); base.OnInit(e); }
[解决办法]
<%@ Page Language="C#" %>
<%@ Reference Control="~/Controls/Spinner.ascx" %>
<script runat="server">
private ASP.Spinner Spinner1
protected void Page_Load(object sender, EventArgs e)
{
Spinner1 = (ASP.Spinner)LoadControl("~/Controls/Spinner.ascx");
}
protected void Button1_Click(object sender, EventArgs e)
{
PlaceHolder1.Controls.Add(Spinner1);
}
</script>
<html>
<head id="Head1" runat="server">
<title>Load User Control Programmatically</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:PlaceHolder runat="server" ID="PlaceHolder1" />
<br />
<asp:Button ID="Button1" runat="server"
Text="Click to Add User Control"
OnClick="Button1_Click" />
<br />
<br />
<asp:Label ID="Label1" runat="server" Text=""></asp:Label>
</div>
</form>
</body>