ck11926375的专栏

ASP.NET Application,Session,Cookie和ViewState等对象用法和区别

ck11926375 — Mon, 10 May 2010 16:33:00 +0800

在ASP.NET中，有很多种保存信息的内置对象，如:Application,Session,Cookie,ViewState和Cache等。下面分别介绍它们的用法和区别。

方法

信息量大小

作用域和保存时间

应用范围

保存位置

Application

任意大小

整个应用程序的生命期

整个应用程序/所有用户

服务器端

Cache

任意大小

可以根据需要设定

整个应用程序/所有用户

服务器端

Session

小量,简单的数据

用户活动时间+一段延迟时间(一般为20分钟)

单个用户

服务器端

Cookie

POST上传

ck11926375 — Tue, 23 Mar 2010 15:55:00 +0800

private Boolean UploadFile()
    {
        Boolean flag = false;
        try
        {
            foreach (string f in Request.Files.AllKeys)
            {

                HttpPostedFile postFile = Request.Files[f];
                if (postFile.ContentLength > 10)
                {
                    #region get new filename
                    string txtFilePath = postFile.FileName;

WebService上传文件

ck11926375 — Tue, 23 Mar 2010 15:42:00 +0800

webservice:

[WebService(Namespace = "http://127.0.0.1/")]    //调用此web service的地址
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
public class Service : System.Web.Services.WebService
{
    public Service()
    {

        //如果使用设计的组件，请取消注释以下行
        //InitializeComponent();
    }

    ///
    /// 上传
    ///
    ///

asp.net 输出XML文件

ck11926375 — Sun, 07 Mar 2010 15:56:00 +0800

private void WriteXML() { StringBuilder sb = new StringBuilder(); sb.Append(" "); sb.Append("

document.getElementsByName() 兼容

ck11926375 — Mon, 18 Jan 2010 10:53:00 +0800

var getElementsByName = function(tag, name){
var returns = document.getElementsByName(name);
if(returns.length > 0) return returns;
returns = new Array();
var e = document.getElementsByTagName(tag);
for(var i = 0; i
if(e[i].getAttribute("name") == name){
returns[returns.length] = e[i];
}
}
return returns;
}
alert(getElementsByName("div","odiv").length); // IE:4 FF:4

短信分割

ck11926375 — Tue, 05 Jan 2010 15:32:00 +0800

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.Collections.Generic;
///
/// checkSms 的摘要说明
///
public class checkSms
{
public checkSms()
{
//

获取操作系统版本号

ck11926375 — Fri, 25 Dec 2009 13:11:00 +0800

function TForm1.GetOSVersion:String;
var OSVersion:TOSVersionInfo;
begin
OSVersion.dwOSVersionInfoSize:=SizeOf(OSVersion);
GetVersionEx(OSVersion);
case OSVersion.dwPlatformId of
    VER_PLATFORM_WIN32_WINDOWS: Result:='WIN';
    VER_PLATFORM_WIN32_NT:      Result:='NT';
    else                        Result:='WIN32';
end;
Result:=Result+IntToStr(OSVersion.dwMajorVersion)+'.'+IntToStr(OSVersion.dwMinorVersion)

母版页使用

ck11926375 — Tue, 01 Dec 2009 09:53:00 +0800

1.母版页访问内容页面
((TextBox)this.ContentPlaceHolder1.FindControl("TextBox1")).Text

2.内容页面访问母版页
((TextBox)((MasterPage)Master).FindControl("TextBox1")).Text

文件查找FindFirst FindNext

ck11926375 — Sun, 26 Jul 2009 22:06:00 +0800

unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;
type
TForm1 = class(TForm)
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
    procedure SearchNext(filename : string);
    Function GetHardDiskPartitionInfo(const DriveLetter:Char;
                                  var VolumeName,VolumeSerialNumber,PartitionType:string;