在c＃中使局部变量值全局化

I have the following code.In this code i am able to get the string value like 1,2,3 etc through the use of eventHandling.How i get the value is not important for now.What i need now is to be able to access this string value outside the page_load event like in the function myfun() as given below.How do i acheive that.

我有以下代码。在这段代码中,我能够通过使用eventHandling得到字符串值1,2,3等。我得到的值现在不重要。我现在需要的是能够在page_load事件之外访问此字符串值,如下面给出的函数myfun()中所示。我如何实现这一点。

protected void Page_Load(object sender, EventArgs e)
{

    hfm mymaster = (hfm)Page.Master;
    lcont lc = mymaster.getlcont();
    lc.myevent += delegate(string st)
     {
         //slbl.Text = st;

         string str =st;
      }
 }

   protectd void myfun()
   {
     //i want to access the string value "st" here.
   }

5 个解决方案

#1

You can do it in two ways as i see:

您可以通过以下两种方式完成此操作:

1) Pass as param:

1)作为参数传递:

protected void Page_Load(object sender, EventArgs e)
{

    hfm mymaster = (hfm)Page.Master;
    lcont lc = mymaster.getlcont();
    lc.myevent += delegate(string st)
     {
         //slbl.Text = st;

         string str =st;
         myfunc(str); // pass as param
      }
 }

 protectd void myfun(string str)  // see signature
 {
     //i want to access the string value "st" here.
 }

2) Make a class variable:

2)创建一个类变量:

string classvariable;
protected void Page_Load(object sender, EventArgs e)
{

    hfm mymaster = (hfm)Page.Master;
    lcont lc = mymaster.getlcont();
    lc.myevent += delegate(string st)
     {
         //slbl.Text = st;

         string str =st;
         classvariable = str; // set it here
     }
}

protectd void myfun()
{
   //i want to access the string value "st" here. // get it here
}

#2

In my experience, you would simply declare the variable you want global outside of the scope of the functions.

根据我的经验,您只需在函数范围之外声明您想要的全局变量。

IE: Whatever / wherever they are contained.

IE:无论在何处/何处包含它们。

string st; // St is declared outside of their scopes
protected void Page_Load(object sender, EventArgs e)
{}
   protectd void myfun()
   {
   }

#3

You can make it public:

你可以把它公之于众:

public - the member can be reached from anywhere. This is the least restrictive visibility. Enums and interfaces are, by default, publicly visible

公众 - 可以从任何地方联系到会员。这是限制性最小的可见性。默认情况下,枚举和界面是公开可见的

Example

<visibility> <data type> <name> = <value>;

public string name = "John Doe";

#4

Place your global (or class?) variable before the Page_Load or right after the Class declaration.

将您的全局(或类?)变量放在Page_Load之前或者在Class声明之后。

public partial class Index : System.Web.UI.Page
{
   private string str = "";

   protected void Page_Load(object sender, EventArgs e)
   {

      hfm mymaster = (hfm)Page.Master;
      lcont lc = mymaster.getlcont();
      lc.myevent += delegate(string st)
      {
          //slbl.Text = st;

         str =st;
      }
   }

   protectd void myfun()
   {
     //i want to access the string value "st" here.

     //value of st has been passed to str already in page_load.
     string newString = str;
   }

}

#5

A single change can make it possible. declare str as global variable

一次改变就可以实现。将str声明为全局变量

public class Form1
{
     string str = "";//Globel declaration of variable
    protected void Page_Load(object sender, EventArgs e)
    {
    }
}

#1