C# 我应该在 asp.net 中声明会话变量的位置
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Where I should declare a session variable in asp.net
提问by Vaibhav Jain
I am building a Asp.net Application. I need to save a HashTable in a session.
我正在构建一个 Asp.net 应用程序。我需要在会话中保存一个 HashTable。
At page load i am writing
在页面加载时我正在写
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
Session["AttemptCount"]=new Hashtable(); //Because of this line.
}
}
Here problem is, when a user refresh the page, session["AttemptCount"] also get refreshed. I want to know where should I declare
这里的问题是，当用户刷新页面时， session["AttemptCount"] 也会刷新。我想知道我应该在哪里申报
Session["AttemptCount"]=new Hashtable();
So that my seesion do not get refeshed.
这样我的视力就不会被刷新。
EDITIn Global.asax, this session will get started, as soon as user opens the website. I want to creat this session only if user go to a particular page. i.e Login.aspx
编辑在 Global.asax 中，一旦用户打开网站，此会话就会开始。我只想在用户转到特定页面时创建此会话。即登录.aspx
采纳答案by Naeem Sarfraz
Do it in the Session_Startmethod in your Global.asaxlike so...
Session_Start在你的Global.asax的方法中这样做......
protected void Session_Start(object sender, EventArgs e)
{
Session["AttemptCount"]=new Hashtable();
}
Update:
更新：
Then simply just do a check to see if the session variable exists, if it doesn't only then create the variable. You could stick it in a property to make things cleaner like so...
然后只需检查会话变量是否存在，如果不存在，则仅创建变量。你可以把它粘在一个属性里，让事情变得更干净……
public Hashtable AttemptCount
{
get
{
if (Session["AttemptCount"] == null)
Session["AttemptCount"]=new Hashtable();
return Session["AttemptCount"];
}
}
And then you could just call on the property AttemptCountwherever you need like so...
然后你可以AttemptCount像这样在任何你需要的地方打电话给财产......
public void doEvent(object sender, EventArgs e)
{
AttemptCount.Add("Key1", "Value1");
}
回答by Ryan O'Neill
Look at Global.asax and the Application_Started (I think) and there is one for session started too.
查看 Global.asax 和 Application_Started（我认为），也有一个用于会话启动。
回答by Pharabus
test if it exists first
首先测试它是否存在
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
if(Session["AttemptCount"] == null)
{
Session["AttemptCount"]=new Hashtable(); //Because of this line.
}
}
}
though the session_start is better, you only need to uses it on one page but you can create it for each session.
尽管 session_start 更好，但您只需在一页上使用它，但您可以为每个会话创建它。
回答by M4N
You could make a property like this in your page:
您可以在页面中创建这样的属性：
protected Hashtable AttemptCount
{
get
{
if (Session["AttemptCount"] == null)
Session["AttemptCount"] = new Hashtable();
return Session["AttemptCount"] as Hashtable;
}
}
then you can use it without having to worry:
那么您就可以使用它而不必担心：
protected void Page_Load(object sender, EventArgs e)
{
this.AttemptCount.Add("key", "value");
}
回答by Shiv Shankar Mahla
Hashtable hastable_name=new Hashtable()
Session["AttemptCount"]=hastable_name
