1.我們經常有這樣的情形：
就是使用者註冊時由於某個資訊填寫錯誤要重新填寫。但是這個過程經過了伺服器PostBack。所以密碼框就清空了。因為PostBack的時候，如果TextBox的TextMode為Password的話，是沒有value屬性傳遞的，所以密碼框是空的。其實這個問題是可以解決的。
2.：
普通情況下不能儲存密碼：
經過處理後可以儲存密碼
代碼：
後台代碼
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Runtime.Remoting;
using System.Runtime.Remoting.Lifetime;
using System.IO;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
this.Password.Attributes.Add("value", Request["Password"]);//對密碼框添加的事件
}
protected void Button1_Click(object sender, EventArgs e)
{
}
}
前台代碼
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!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>儲存密碼框的小技巧 http://blog.csdn.net/21aspnet/ 清清月兒</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Label ID="Label1" runat="server" Text="請輸入密碼"></asp:Label>
<asp:TextBox ID="Password" runat="server" TextMode="Password"></asp:TextBox>
<asp:Button ID="Button1" runat="server" Text="提交" OnClick="Button1_Click" /></div>
</form>
</body>
</html>
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