c# - WinForms AcceptButton 不工作？

Question

好吧，这让我很烦，我就是想不通哪里出了问题...

我做了两个表格。第一个表单只有一个简单的按钮，它可以像这样打开另一个对话框:

using (Form2 f = new Form2())
{
    if (f.ShowDialog() != DialogResult.OK)
        MessageBox.Show("Not OK");
    else
        MessageBox.Show("OK");
}

第二个是 Form2，上面有两个按钮。我所做的只是将表单 AcceptButton 设置为一个，将 CancelButton 设置为另一个。在我看来，这就是完成这项工作所需的全部。但是当我运行它时，我单击打开 Form2 的按钮。我现在可以单击设置为 CancelButton 的按钮，然后我会看到“Not OK”消息框。但是当我点击设置为 AcceptButton 的那个时，没有任何反应？Form2 的 InitializeComponent 代码如下所示:

private void InitializeComponent()
{
    this.button1 = new System.Windows.Forms.Button();
    this.button2 = new System.Windows.Forms.Button();
    this.SuspendLayout();
    // 
    // button1
    // 
    this.button1.Location = new System.Drawing.Point(211, 13);
    this.button1.Name = "button1";
    this.button1.Size = new System.Drawing.Size(75, 23);
    this.button1.TabIndex = 0;
    this.button1.Text = "button1";
    this.button1.UseVisualStyleBackColor = true;
    // 
    // button2
    // 
    this.button2.DialogResult = System.Windows.Forms.DialogResult.Cancel;
    this.button2.Location = new System.Drawing.Point(130, 13);
    this.button2.Name = "button2";
    this.button2.Size = new System.Drawing.Size(75, 23);
    this.button2.TabIndex = 1;
    this.button2.Text = "button2";
    this.button2.UseVisualStyleBackColor = true;
    // 
    // Form2
    // 
    this.AcceptButton = this.button1;
    this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
    this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
    this.CancelButton = this.button2;
    this.ClientSize = new System.Drawing.Size(298, 59);
    this.Controls.Add(this.button2);
    this.Controls.Add(this.button1);
    this.Name = "Form2";
    this.Text = "Form2";
    this.Load += new System.EventHandler(this.Form2_Load);
    this.ResumeLayout(false);
}

除了添加这两个按钮并设置 AcceptButton 和 CancelButton 之外，我什么也没做。为什么它不起作用？

Answer 1

仅仅设置AcceptButton/CancelButton 是不够的。这只是告诉应该在 Enter/Esc 上调用哪个按钮。您必须设置按钮的 DialogResult 属性。