!1897 feat(#I4BS60): add a method that get current item of tab

* refactor: 重命名 GetActiveTab 方法
* refactor: 重构 获取当前 tab 方法
* doc: 添加 tab 页面资源文件
* feat: Tab 组件添加获得当前 Tab 的方法

src/BootstrapBlazor.Shared/Locales/en.json

@@ -701,6 +701,7 @@
     "Method6": "Close the current tab method",
     "Method7": "Close other tab methods",
     "Method8": "Close all tab methods",
+    "Method9": "Get current tab methods",
     "BackAddTabText": "I am a new Tab with the name {0}",
     "BackText1": "Counter",
     "BackText2": "Weather forecast",

src/BootstrapBlazor.Shared/Locales/zh.json

@@ -701,6 +701,7 @@
     "Method6": "关闭当前标签页方法",
     "Method7": "关闭其他标签页方法",
     "Method8": "关闭所有标签页方法",
+    "Method9": "获得当前标签页方法",
     "BackAddTabText": "我是新建的 Tab, 名称是 {0}",
     "BackText1": "计数器",
     "BackText2": "天气预报",

src/BootstrapBlazor.Shared/Pages/Samples/Tabs.razor.cs

@@ -273,6 +273,12 @@ namespace BootstrapBlazor.Shared.Pages
                 Parameters = "",
                 ReturnValue = "Task"
             },
+            new MethodItem() {
+                Name = nameof(Tab.GetActiveTab),
+                Description = Localizer["Method9"]!,
+                Parameters = "",
+                ReturnValue = "Tabitem"
+            },
         };
     }
 }

src/BootstrapBlazor/Components/Tab/Tab.razor.cs

@@ -606,6 +606,12 @@ namespace BootstrapBlazor.Components
             }
         }
 
+        /// <summary>
+        /// 获得当前活动 Tab
+        /// </summary>
+        /// <returns></returns>
+        public TabItem? GetActiveTab() => _items.FirstOrDefault(s => s.IsActive);
+
         private void ActiveTabItem(TabItem item)
         {
             _items.ForEach(i => i.SetActive(false));