为usercontrol中的fileupload设置postback（用于updatepane中）

原创:

<%@ Control Language="C#" AutoEventWireup="true" CodeFile="Upload.ascx.cs" Inherits="Upload" %>

<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>

<asp:FileUpload ID="FileUpload1" runat="server" />

<asp:Button ID="Button1" runat="server" Text="Button" onclick="Button1_Click" />

<asp:Button ID="Button2" runat="server" Text="Button" onclick="Button2_Click" />

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default5.aspx.cs" Inherits="Default5" %>

<%@ Register TagPrefix="Joey" TagName="Upload" Src="~/Upload.ascx" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">

<title>Untitled Page</title>

</head>

<body>

<asp:ScriptManager ID="ScriptManager1" runat="server" />

<div>

<asp:UpdatePanel ID="UpdatePanel1" runat="server">

<Joey:Upload runat="server" ID="Joey1" />

</ContentTemplate>

</asp:UpdatePanel>

</div>

</form>

</body>

</html>

using System;

using System.Collections;

using System.Configuration;

using System.Data;

using System.Linq;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.HtmlControls;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Xml.Linq;

public partial class Upload : System.Web.UI.UserControl

{

protected override void OnLoad(EventArgs e)

{

base.OnLoad(e);

ScriptManager manager = ScriptManager.GetCurrent(this.Page);

if (manager != null)

{

manager.RegisterPostBackControl(this.Button1);

}

protected void Button1_Click(object sender, EventArgs e)

{

if (this.FileUpload1.HasFile)

{

this.TextBox1.Text = "yes";

}

else

{

this.TextBox1.Text = "no";

}

protected void Button2_Click(object sender, EventArgs e)

{