Question

我刚开始学习C＃。我正在开发一个最初的程序，我需要一些帮助。不确定原因，但我在尝试编译代码时遇到以下错误：＆lt; 39,48＆gt; CS0234命名空间“System”中不存在类型或命名空间“Event”。不确定编译器是读错了还是错误输入了什么。无论如何，看看这个，让我知道你的想法。谢谢！

using System;
using System.Windows.Forms;

namespace HelloWin
{
  public class MyForm : Form
  {
    private TextBox txtEnter;
    private Label lblDisplay;
    private Button btnOK;

    public MyForm()
    {
      this.txtEnter = new TextBox();
      this.lblDisplay = new Label();
      this.btnOK = new Button();
      this.Text = "My HelloWin App!";

      // txtEnter
      this.txtEnter.Location = new System.Drawing.Point(16, 32);
      this.txtEnter.Size = new System.Drawing.Size(264, 20);

      // lblDisplay
      this.lblDisplay.Location = new System.Drawing.Point(16, 72);
      this.lblDisplay.Size = new System.Drawing.Size(264, 128);

      // btnOk
      this.btnOK.Location = new System.Drawing.Point(88, 224);
      this.btnOK.Text = "OK";
      this.btnOK.Click +=
          new System.EventHandler(this.btnOK_Click); 
      // MyForm
      this.Controls.AddRange(new Control[]{this.txtEnter, this.lblDisplay, this.btnOK});
    }

    static void Main ()
    {
      Application.Run(new MyForm());
    }
    private void btnOK_Click(object sender, System.Event.Args e)
    {
      lblDisplay.Text = txtEnter.Text + "\n" + lblDisplay.Text;
    }
  }
}

Answer 1

删除System.Event . Args e

上的第二个点

...
private void btnOK_Click(object sender, System.EventArgs e)
...

C＃基本程序

1 个答案: