blocks|key|2033833|text|尝尝这个。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2033834|int+counter+=+Int32.Parse(Session["counter"].ToString());+//Session["counter"]+may+be+null

Session["counter"]+=+%2B%2Bcounter;|code-block|syntax|javascript|2033835|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Try this.

<pre><code>int counter = Int32.Parse(Session["counter"].ToString()); //Session["counter"] may be null

Session["counter"] = ++counter;
</code></pre>

blocks|key|5611980|text|int+counter=1;
Session["counter"]=counter;|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|5611981|当您想要更新该值时，读取该值并将其转换为int，然后递增，保存回来|unstyled|5611982|if(Session["counter"]!=null)
{
+counter=Convert.ToInt32(Session["counter"]);
}
counter%2B%2B;
Session["counter"]=counter;|5611983|编辑:根据注释，这是您可以检查计数器值的方式。我将检查封装在两个方法中，以设置和获取，您甚至可以像其他人提到的那样使用属性。|offset|length|style|BOLD|5611984|private+int+GetLoginAttempts()
{
++++int+counter=0;
++++if(Session["counter"]!=null)
++++{
+++++counter=Convert.ToInt32(Session["counter"]);
++++}
++return+counter;
}
private+void+IncreaseLoginAttempts()
{
+++if(Session["counter"]!=null)
+++{
+++++counter=Convert.ToInt32(Session["counter"]);
+++}
+++counter%2B%2B;
+++Session["counter"]=counter;
}|5611985|当用户尝试登录(在您的按钮单击/操作方法中)时，检查当前值|5611986|+++if(GetLoginAttempts()==3)
+++{
++++++++//This+means+user+already+tried+3+times,+show+him+a+message+!
+++}
+++else
+++{
++++++++//Do+the+login+process,+If+login+fails,+increase+the+counter+
+++++++IncreaseLoginAttempts()
+++}|5611987|entityMap^0|0|0|0|0|3|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|X|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|Y|8|@]|9|@]|A|$B|C]]|$1|I|3|J|5|F|7|Z|8|@$K|10|L|11|M|N]]|9|@]|A|$]]|$1|O|3|P|5|6|7|12|8|@]|9|@]|A|$B|C]]|$1|Q|3|R|5|F|7|13|8|@]|9|@]|A|$]]|$1|S|3|T|5|6|7|14|8|@]|9|@]|A|$B|C]]|$1|U|3|-4|5|F|7|15|8|@]|9|@]|A|$]]]|V|$]]

<pre><code>int counter=1;
Session["counter"]=counter;
</code></pre>

When you want to update that, read the value and convert it to int and then increase, save back

<pre><code>if(Session["counter"]!=null)
{
 counter=Convert.ToInt32(Session["counter"]);
}
counter++;
Session["counter"]=counter;
</code></pre>

EDIT : As per the comment, This is how you can check the counter value. I wrapped the checking inside 2 methods to set and get, you can even use Properties as others mentioned.

<pre><code>private int GetLoginAttempts()
{
 int counter=0;
 if(Session["counter"]!=null)
 {
 counter=Convert.ToInt32(Session["counter"]);
 }
 return counter;
}
private void IncreaseLoginAttempts()
{
 if(Session["counter"]!=null)
 {
 counter=Convert.ToInt32(Session["counter"]);
 }
 counter++;
 Session["counter"]=counter;
}
</code></pre>

and when user tries to login( in your button click / action method ), check the Current value 

<pre><code> if(GetLoginAttempts()==3)
 {
 //This means user already tried 3 times, show him a message !
 }
 else
 {
 //Do the login process, If login fails, increase the counter 
 IncreaseLoginAttempts()
 }
</code></pre>

blocks|key|2039355|text|您可以通过将其包装在属性中来实现它，如下所示：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2039356|++++public+int+PasswordAttempts
++++{
++++++++get
++++++++{
++++++++++++if+(Session["PasswordAttempts"]+==+null)
++++++++++++++++Session["PasswordAttempts"]+=+0;

++++++++++++return+(int)Session["PasswordAttempts"];
++++++++}
++++++++set
++++++++{
++++++++++++Session["PasswordAttempts"]+=+value;
++++++++}
++++}

++++protected+void+Submit_Click(object+sender,+EventArgs+e)
++++{
++++++++PasswordAttempts%2B%2B;
++++}|code-block|syntax|javascript|2039357|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

You could implement it by wrapping it in a property as so:

<pre><code> public int PasswordAttempts
 {
 get
 {
 if (Session["PasswordAttempts"] == null)
 Session["PasswordAttempts"] = 0;

 return (int)Session["PasswordAttempts"];
 }
 set
 {
 Session["PasswordAttempts"] = value;
 }
 }

 protected void Submit_Click(object sender, EventArgs e)
 {
 PasswordAttempts++;
 }
</code></pre>

blocks|key|1572197|text|private+Int16+Counter
{
++++get
++++{
++++++++if+(ViewState["Counter"]+==+null)
++++++++++++return+0;
++++++++else
++++++++++++return+Convert.ToInt16(ViewState["Counter"]);
++++}
++++set
++++{
++++++++Int16+counter+=+0;
++++++++if+(ViewState["Counter"]+==+null)
++++++++++++counter+=+0;
++++++++else
++++++++++++counter+=+Convert.ToInt16(ViewState["Counter"]);
++++++++ViewState["Counter"]+=+counter+%2B+1+%2B+value;
++++}
}
if(counter+==+3)
{
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1572198|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>private Int16 Counter
{
 get
 {
 if (ViewState["Counter"] == null)
 return 0;
 else
 return Convert.ToInt16(ViewState["Counter"]);
 }
 set
 {
 Int16 counter = 0;
 if (ViewState["Counter"] == null)
 counter = 0;
 else
 counter = Convert.ToInt16(ViewState["Counter"]);
 ViewState["Counter"] = counter + 1 + value;
 }
}
if(counter == 3)
{
}
</code></pre>

Alright so I have a task, that I have to let the client try to enter the password 3 times, if he doesn't enter the right password in 3 times, it will redirect him to another page, The thing is that I don't know how can I use the session, how can I do like ++ or something.

<pre><code>Session["counter"] = 0;
</code></pre>

And I am trying to do the following:

<pre><code>Session["counter"]++;
</code></pre>

How can I detect if the client tried to enter the password 3 times?
Thanks

Adding to the session number

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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好的，所以我有一个任务，我必须让客户端尝试输入密码3次，如果他在3次中没有输入正确的密码，它会将他重定向到另一个页面，问题是我不知道如何使用会话，我如何像++或其他东西。Session["counter"] = 0;我正在尝试做以下几件事：Session["counter"]++;如何检测客户端是否尝试输入密码3次？谢...

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