页面刷新时如何留住密码框的内容

Question

Page_Load:
if (Request["Textbox1"]!null)
    TextBox1.Attribues["value"]=Request["TextBox1"].Tostring()

Answer 1

楼上大侠：
c:\inetpub\wwwroot\WebApplication1\WebForm2.aspx.cs(213): “System.Web.UI.WebControls.TextBox”并不包含对“Attribues”的定义

Answer 2

不会不包含Attributes吧你也可以这样啊TextBox1.text="...";

Answer 3

this.DepartmentID.Attributes.Add("value","123456");

Answer 4

http://expert.csdn.net/Expert/TopicView1.asp?id=2561040
使用里面的SafePwdBox

Answer 5

楼上很历害，可是我刚用ASP.NET，还不想使用第三方控件:)

Answer 6

Attribues敲错了，是Attributes
如loulanlouzhu(桃花潭水深千尺，不及阿勇念你情) 所说

Answer 7

这是原代码namespace Lostinet.Web
{
using System;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.ComponentModel; /// <summary>
/// SafePwdBox is input box that value not be clear when postback
/// </summary>
[DefaultEvent("ValueChanged")]
[DefaultProperty("Value")]
[ValidationProperty("Value")]
public class SafePwdBox : WebControl , IPostBackDataHandler
{
/// <summary>
/// char for mask at client
/// </summary>
static public char MaskChar
{
get
{
return '~';
}
} /// <summary>
/// .ctor
/// </summary>
public SafePwdBox():base(HtmlTextWriterTag.Input)
{
} /// <summary>
/// get the key for Cache
/// </summary>
protected string GetCacheKey()
{
string key=(string)ViewState["ck"];
if(key==null)
{
key=Guid.NewGuid().GetHashCode().ToString("x");
ViewState["ck"]=key;
ViewState.SetItemDirty("ck",true);
}
return key;
} /// <summary>
/// CacheTimeout
/// </summary>
[DefaultValue(30)]
public int CacheTimeout
{
get
{
return ct;
}
set
{
ct=value;
}
}
int ct=30; /// <summary>
/// is in design
/// </summary>
protected bool DesignMode
{
get
{
return (Site!=null&&Site.DesignMode)||Context==null||HttpContext.Current==null;
}
} /// <summary>
/// password
/// </summary>
[DefaultValue("")]
[Bindable(true)]
public string Value
{
get
{
if(DesignMode)
{
string v=(string)ViewState["v"];
return v==null?"":v;
}
else
{
string v=(string)Context.Cache[GetCacheKey()];
return v==null?"":v;
}
}
set
{
if(DesignMode)
{
ViewState["v"]=value;
}
else
{
Context.Cache.Insert(GetCacheKey(),value,null,DateTime.MaxValue,TimeSpan.FromMinutes(CacheTimeout),System.Web.Caching.CacheItemPriority.NotRemovable,null);
}
}
} static object EventValueChanged=new object(); /// <summary>
/// fired when value changed
/// </summary>
public event EventHandler ValueChanged
{
add
{
Events.AddHandler(EventValueChanged,value);
}
remove
{
Events.RemoveHandler(EventValueChanged,value);
}
} /// <summary>
/// fire ValueChanged
/// </summary>
protected virtual void OnValueChanged(EventArgs e)
{
EventHandler handler=(EventHandler)Events[EventValueChanged];
if(handler!=null)
handler(this,e);
} /// <summary>
/// override to render attributes
/// </summary>
protected override void AddAttributesToRender(HtmlTextWriter writer)
{
writer.AddAttribute(HtmlTextWriterAttribute.Name,UniqueID);
writer.AddAttribute(HtmlTextWriterAttribute.Type,"password",false);
writer.AddAttribute(HtmlTextWriterAttribute.Value,new string(MaskChar,Value.Length),false);
base.AddAttributesToRender(writer);
}
void IPostBackDataHandler.RaisePostDataChangedEvent()
{
OnValueChanged(EventArgs.Empty);
} bool IPostBackDataHandler.LoadPostData(string postDataKey, System.Collections.Specialized.NameValueCollection postCollection)
{
char mc=MaskChar;
string v=Value;
char[] nvs=postCollection[postDataKey].ToCharArray();
for(int i=0;i<v.Length&&i<nvs.Length;i++)
{
if(nvs[i]==mc)
nvs[i]=v[i];
}
string nv=new string(nvs);
if(v!=nv)
{
Value=nv;
return true;
}
return false;
}
}
}

Answer 8

to loulanlouzhu(桃花潭水深千尺，不及阿勇念你情) c:\inetpub\wwwroot\WebApplication1\WebForm2.aspx.cs(213): “System.Web.UI.WebControls.TextBox”并不包含对“DepartmentID”的定义

Answer 9

to loulanlouzhu(桃花潭水深千尺，不及阿勇念你情) c:\inetpub\wwwroot\WebApplication1\WebForm2.aspx.cs(213): “System.Web.UI.WebControls.TextBox”并不包含对“DepartmentID”的定义
－－－》》晕！！！！！！
  DepartmentID是你的密码文本框的ID，改 下就好了！