Question

在Program.cs中，Argument EventArgs 更改为 FormClosingEventArgs

private void Exit_Click(object sender, FormClosingEventArgs e) {   }

在Program.Designer.cs中，更改 Program.cs 会导致第9行出错

    private void InitializeComponent()
    {
        this.Exit = new System.Windows.Forms.Button();
        this.SuspendLayout();
        this.Exit.Location = new System.Drawing.Point(839, 275);
        this.Exit.Name = "Exit";
        this.Exit.Size = new System.Drawing.Size(169, 112);
        this.Exit.TabIndex = 0;
        this.Exit.Text = "Exit";
        this.Exit.UseVisualStyleBackColor = true;
        this.Exit.Click += new System.EventHandler(this.Exit_Click);     //ErrorPart
        this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
        this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
        this.ClientSize = new System.Drawing.Size(1020, 399);
        this.Controls.Add(this.Exit);
        this.Name = "Form1";
        this.Text = "Form1";
        this.ResumeLayout(false);
    }

Exisi错误CS0123：'Exit_Click'没有超载与委托'EventHandler'匹配。

每当我开始调试时，这将显示给我，我使用Visual Studio 2017，问题是什么？＃/ p>

Answer 1

由于Click的{{1}}处理程序不接受System.Windows.Forms.Control类型的参数，而是需要传递FormClosingEventArgs这样的EventArgs

private void Exit_Click(object sender, EventArgs e) {   }

简单来说，就像为string分配int值一样变量

有关详细信息，请参阅此内容 - https://msdn.microsoft.com/en-us/library/system.windows.forms.control.click(v=vs.110).aspx

当我将“EventArgs”的参数更改为“FormClosingEventArgs”时为什么会出错

1 个答案: