将值传递给按钮 [英] Pass Values to Button

问题描述

大家好！如何将值传递给按钮单击？

Hi Everyone! How can i pass values to button click?

public Testing(string passvalue) //passvalue is "Hello"
       {
           MessageBox.Show(passvalue);  // Show "Hello"
           InitializeComponent();
       }

private void btnSubmit_Click(object sender, EventArgs e) 
        {
            Messagebox.Show(passvalue); // the name 'passvalue' does not exist in the current context
        }

请给我一些想法或解决方案。

谢谢！

Please give me idea or solutions.
Thanks!

推荐答案

您必须在课堂上创建一个字段，如下所示：

You would have to make it a field in your class, like this:

public class TestForm : Form
{
    private string passvalue = "Hello World!";

    public Testing()
       {
           MessageBox.Show(passvalue);  // Show "Hello"
           InitializeComponent();
       }
 
    private void btnSubmit_Click(object sender, EventArgs e) 
        {
            Messagebox.Show(passvalue); 
        }
}

或者如果你想获得一点点发烧友......

Or if you want to get a little fancier...

public class TestForm : Form
{
    public TestForm()
    {
        InitializeComponents();

        btnSubmit.Tag = "Hello World";   //You can set this anywhere in code.
    }

    public void Testing(string passvalue)
       {
           MessageBox.Show(passvalue);
           InitializeComponent();
       }
 
    private void btnSubmit_Click(object sender, EventArgs e) 
        {
            Messagebox.Show(((Button)sender).Tag.ToString()); 
        }
}

你可以先声明一个变量说：string temp;



然后在Testing方法中，将passvalue的值赋给temp：temp = passvalue;



最后，在你的按钮点击事件：MessageBox.Show（temp）;

You can first declare a variable say: string temp;

then in the Testing method, assign the value of passvalue to temp: temp = passvalue;

lastly, in your button click event: MessageBox.Show(temp);

这篇关于将值传递给按钮的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！