下面是我在自定义控件中使用控件状态的简单代码,
[DefaultProperty("Text")]
[ToolboxData("<{0}:WebCustomControl1 runat=server></{0}:WebCustomControl1>")]
public class WebCustomControl1 : WebControl
{
[Bindable(true)]
[Category("Appearance")]
[DefaultValue("")]
[Localizable(true)]
public string Text
{
get { return text; }
set { text = value; }
}
private string text;
protected override void RenderContents(HtmlTextWriter output)
{
output.Write(Text);
}
protected override void OnInit(System.EventArgs e)
{
base.OnInit(e);
Page.RequiresControlState(this);
}
protected override object SaveControlState()
{
object baseSate = base.SaveControlState();
return new Pair(baseSate, Text);
}
protected override void LoadControlState(object savedState)
{
Pair value = savedState as Pair;
text = value.Second;
}
}
但它似乎不起作用.. SaveControlState和LoadControlState没有触发。有人能帮助我吗?
以下是aspx代码。这是我使用自定义控件的地方。
<%@ Page Language="C#" AutoEventWireup="true" EnableViewState="true" CodeBehind="Default.aspx.cs" Inherits="WebApplication1._Default" %>
<%@ Register Assembly="WebApplication1" Namespace="WebApplication1" TagPrefix="cc1" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
</head>`enter code here`
<body>
<form id="form1" runat="server">
<div>
<cc1:WebCustomControl1 ID="WebCustomControl1_1" runat="server" />
<asp:Button ID="Button1" runat="server" Text="Button" /></div>
</form>
</body>
</html>
答案 0 :(得分:7)
您致电RequiresControlState
确定是否已注册指定的Control对象以参与控制状态管理。
但你应该致电RegisterRequiresControlState
将控件注册为必须持久控制状态的控件。