还是关于在 Page_Load 中定义了一个 linkbutton,然后我在 button_click_upload() 中如何调用它

parsely 2003-08-29 11:30:36

你好，多谢你们的帮助，我照你说的做了，把 linkbutton 放在了下面

protected void button_click_upload(Object sender, EventArgs e)
{

LinkButton myLinkButton = new LinkButton();
myLinkButton.ID = "myLink";
myLinkButton.Text = "取消";
myLinkButton.Visible=false;
myLinkButton.Click += new EventHandler(this.Process);
this.Controls[1].Controls.Add(myLinkButton);

，不过，当点击这个 linkbutton 时，并没有执行以下这段程序啊

private void Process(object sender,EventArgs e)
{
upload_file.Visible=true;
Button1.Visible=true;

Info.Visible=false;
}

如果把

LinkButton myLinkButton = new LinkButton();
myLinkButton.ID = "myLink";
myLinkButton.Text = "取消";
myLinkButton.Visible=false;
myLinkButton.Click += new EventHandler(this.Process);
this.Controls[1].Controls.Add(myLinkButton);

以上代码放在 page_load 里就可以，这是为什么啊，不好意思，我把那个帖子给结了，所以只好重新问了，真的不好意思，谢谢！

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saucer 2003-08-30

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<%@ Page Language="C#" %>
<script runat="server">

public bool ButtonCreated
{
get
{
object o = ViewState["ButtonCreated"];
if ( o == null)
return false;
else
return (bool)ViewState["ButtonCreated"];
}
set
{
ViewState["ButtonCreated"] = value;
}
}
protected void Page_Load(Object sender, EventArgs e)
{
if (ButtonCreated)
CreateButton();
}

void CreateButton()
{
LinkButton myLinkButton = new LinkButton();
myLinkButton.ID = "myLink";
myLinkButton.Text = "click me";
//myLinkButton.Visible=false;
myLinkButton.Click += new EventHandler(this.Process);
form1.Controls.Add(myLinkButton);
}
protected void button_click_upload(Object sender, EventArgs e)
{
if (!ButtonCreated)
{
CreateButton();
ButtonCreated = true;
}
}

private void Process(object sender,EventArgs e)
{
Response.Write("linkbutton is clicked at " + DateTime.Now.ToString());
}

</script>
<html>
<head>
</head>
<body>
<form runat="server" id="form1">
<asp:Button id=btn text="create link button" runat=server onclick="button_click_upload" />
</form>
</body>
</html>