DevExpress WinForms：在ViewCaption旁添加新增行按钮

针对你使用嵌入式网格展示Issue→Invoice→Invoice Items三级数据，需要在详情ViewCaption旁添加新增按钮的需求，以下是几个可行的解决方向：

1. 自定义绘制ViewCaption并捕获点击事件 #

利用GridView的CustomDrawViewCaption事件手动绘制"+"按钮区域，再通过鼠标事件判断点击位置触发新增逻辑：

// 自定义绘制标题旁的+按钮
private void gridViewInvoice_CustomDrawViewCaption(object sender, DevExpress.XtraGrid.Views.Grid.CustomDrawViewCaptionEventArgs e)
{
    GridView view = sender as GridView;
    // 计算按钮位置（标题文本右侧）
    Rectangle btnRect = new Rectangle(e.Bounds.Right - 30, e.Bounds.Top, 25, e.Bounds.Height);
    // 绘制按钮背景和+符号
    e.Graphics.FillRectangle(Brushes.LightGray, btnRect);
    e.Graphics.DrawRectangle(Pens.Black, btnRect);
    e.Graphics.DrawString("+", new Font("Arial", 12), Brushes.Black, btnRect, new StringFormat { Alignment = StringAlignment.Center, LineAlignment = StringAlignment.Center });
    // 存储按钮区域供后续点击判断
    view.Tag = btnRect;
}

// 捕获鼠标点击事件判断是否点击了按钮
private void gridViewInvoice_MouseDown(object sender, MouseEventArgs e)
{
    GridView view = sender as GridView;
    Rectangle btnRect = view.Tag as Rectangle;
    if (btnRect != null && btnRect.Contains(e.Location))
    {
        // 执行新增Invoice的逻辑
        AddNewInvoice(view);
    }
}

2. 直接在ViewCaption容器中添加Button控件 #

通过查找GridView标题对应的Label控件的父容器，直接插入Button：

private void gridViewInvoice_VisibleChanged(object sender, EventArgs e)
{
    GridView view = sender as GridView;
    // 查找ViewCaption的Label控件
    Label captionLabel = view.Controls.OfType<Label>().FirstOrDefault(l => l.Name == "viewCaption");
    if (captionLabel != null && captionLabel.Parent.Controls.OfType<Button>().FirstOrDefault(b => b.Name == "btnAdd") == null)
    {
        Button btnAdd = new Button();
        btnAdd.Name = "btnAdd";
        btnAdd.Text = "+";
        btnAdd.Size = new Size(25, captionLabel.Height);
        btnAdd.Location = new Point(captionLabel.Right + 5, captionLabel.Top);
        btnAdd.Click += (s, args) => { AddNewInvoice(view); };
        captionLabel.Parent.Controls.Add(btnAdd);
    }
}

注意：需确保在视图可见时执行此逻辑，避免控件未初始化的问题。

3. 使用DetailDescriptor的自定义Header模板（适用于DevExpress明细描述器） #

如果你的三级数据是通过GridViewDetailDescriptor配置的，可以直接自定义明细视图的HeaderTemplate，在模板中加入Button：

// 代码方式创建自定义Header模板
GridViewDetailDescriptor invoiceDetailDescriptor = new GridViewDetailDescriptor();
// 创建模板控件
LayoutControl layout = new LayoutControl();
LayoutControlItem captionItem = new LayoutControlItem(layout, null);
captionItem.Text = "Invoices";
// 添加新增按钮
Button btnAdd = new Button();
btnAdd.Text = "+";
btnAdd.Click += (s, args) => { AddNewInvoice(invoiceDetailDescriptor.InnerView as GridView); };
LayoutControlItem btnItem = new LayoutControlItem(layout, btnAdd);
layout.AddItem(captionItem);
layout.AddItem(btnItem);
// 绑定模板到DetailDescriptor
invoiceDetailDescriptor.HeaderTemplate = new ControlTemplate(() => layout);
// 将DetailDescriptor绑定到顶级Issue视图
gridViewIssue.DetailDescriptor = invoiceDetailDescriptor;

这种方式更贴合DevExpress的组件设计，无需手动定位控件。

内容的提问来源于stack exchange，提问作者derYak