将值存储在变量中 [英] store values in variable

问题描述

大家好，

如何存储Button_Click事件下的变量的值，以便可以将其再次用于另一个Button_Click事件?

Hello all,

How can I store the value of the variables which are under Button_Click event, so that I can use that value again for another Button_Click event ?

推荐答案

这取决于环境你在.
WinForms的过程与网站的过程非常不同.

对于WinForms，您需要做的就是将定义移到类级别，因此它不在click事件处理程序之内:

That depends on the environment you are in.
The procedure for WinForms is very different from the procedure for a web site.

For WinForms, all you need to do is move teh definition to class level, so it is not within the click event handler:

private int myInt = 6;
private void myButton_Click(object sender, EventArgs e)
    {
    myInt++;
    }

对于Web来说，它有点复杂，因为在将页面加载到客户端之后不维护类变量(并且它们将在回发之前全部重置).在这种情况下，请使用会话:

For Web, it is a bit more complex, because class variables are not maintained after a page is loaded to the client (and they will all be reset before a post back). In this case, use the Session:

   int myInt = Session["MyInt"];
...
   myInt++;
...
   Session["MyInt"] = myInt;

   // one button click
Session["op1"] = op1;
Session["op2"] = op2;
Session["op"] = op;

//another button click event
op1 = int.Parse(Session["op1"].ToString());
            op2 = int.Parse(Session["op2"].ToString());
            op = Session["op"].ToString();

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