前面用iframe实现了多标签页,这次是不用iframe实现的多标签页.参考了一下Ant Design Blazor.
基本功能已经都实现了不论是标签滚动、激活、左移、右移、关闭其他,还是在内容页跳转、新增、关闭标签都有实现。
已经可以用来做实际项目
源码地址: https://github.com/liningit/BlazorWebassemblyMultiPagesTabNoIframe
实现原理是新建一个类继承RouteView,在此类里面的Render方法中可以通过RouteData获取当前路由对应的对象.然后生成RenderFragment.
然后将其保存到List中,然后循环显示出来.对于未激活的通过display:none隐藏就可以了,这样哪怕切换标签状态也是保存的并不会刷新
public class ReuseTabsRouteView : RouteView
{
[Inject]
public TabSetTool TabSetTool { get; set; }
[Inject]
public NavigationManager Navmgr { get; set; }
protected override void Render(RenderTreeBuilder builder)
{
var layoutType = RouteData.PageType.GetCustomAttribute<LayoutAttribute>()?.LayoutType ?? DefaultLayout;
var body = CreateBody(RouteData, Navmgr.Uri);
builder.OpenComponent<CascadingValue<ReuseTabsRouteView>>(0);
builder.AddAttribute(1, "Name", "RouteView");
builder.AddAttribute(2, "Value", this);
builder.AddAttribute(3, "ChildContent", (RenderFragment)(b =>
{
b.OpenComponent(20, layoutType);
b.AddAttribute(21, "Body", body);
b.CloseComponent();
}));
builder.CloseComponent();
var url = "/" + Navmgr.ToBaseRelativePath(Navmgr.Uri);
if (url != "/#")
{
var selTab = TabSetTool.Pages.FirstOrDefault(m => m.Url == url && (m.Title == TabSetTool.Title || string.IsNullOrEmpty(m.Title)));
if (selTab == null)
{
TabSetTool.Pages.Add(new Tab
{
Body = body,
Url = url,
Title = TabSetTool.Title,
IsActive = true,
});
}
else
{
selTab.Title = TabSetTool.Title;
selTab.Body = body;
selTab.IsActive = true;
}
}
}
private RenderFragment CreateBody(RouteData routeData, string url)
{
return builder =>
{
builder.OpenComponent(0, routeData.PageType);
foreach (var routeValue in routeData.RouteValues)
{
builder.AddAttribute(1, routeValue.Key, routeValue.Value);
}
builder.CloseComponent();
};
}
}
App.razor中将RouteView改成ReuseTabsRouteView.
另外要注意TabSet中一定要有
[CascadingParameter(Name = "RouteView")]
public ReuseTabsRouteView RouteView { get; set; }
这两句,要不然页面会不更新