Question

我有以下代码。在这段代码中，我可以通过使用eventHandling来获取字符串值1,2,3等。我现在得到的值并不重要。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.
   }

Answer 1

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：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()
   {
   }

Answer 2

您可以公开：

公开 - 可以从任何地方联系到该成员。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

示例

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

或

public string name = "John Doe";

Answer 3

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;
   }

}

Answer 4

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)
    {
    }
}

Answer 5

我可以通过两种方式完成这项工作：

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）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
}

在c＃中使局部变量值全局化

5 个答案: