Rename projects to FileShare

FileShare-PC/ViewLocator.cs

@@ -0,0 +1,53 @@
+using Avalonia.Controls;
+using Avalonia.Controls.Templates;
+using FileShare_PC.ViewModels;
+using System;
+using System.Diagnostics.CodeAnalysis;
+
+namespace FileShare_PC
+{
+    /// <summary>
+    /// Given a view model, returns the corresponding view if possible.
+    /// </summary>
+    [RequiresUnreferencedCode(
+        "Default implementation of ViewLocator involves reflection which may be trimmed away.",
+        Url = "https://docs.avaloniaui.net/docs/concepts/view-locator")]
+    /// <summary>
+    /// 视图定位器，根据 ViewModel 类型自动查找对应的 View，
+    /// 实现 IDataTemplate 以支持 Avalonia 的数据模板机制。
+    /// </summary>
+    public class ViewLocator : IDataTemplate
+    {
+        /// <summary>
+        /// 根据 ViewModel 实例构建对应的 View 控件。
+        /// 约定：将 ViewModels 命名空间中的 ViewModel 替换为 Views 命名空间中的同名 View。
+        /// </summary>
+        /// <param name="param">ViewModel 实例。</param>
+        /// <returns>对应的 View 控件；若未找到则返回 TextBlock 显示错误信息。</returns>
+        public Control? Build(object? param)
+        {
+            if (param is null)
+                return null;
+
+            var name = param.GetType().FullName!.Replace("ViewModel", "View", StringComparison.Ordinal);
+            var type = Type.GetType(name);
+
+            if (type != null)
+            {
+                return (Control)Activator.CreateInstance(type)!;
+            }
+
+            return new TextBlock { Text = "Not Found: " + name };
+        }
+
+        /// <summary>
+        /// 判断数据对象是否为 ViewModel 类型（以 "ViewModel" 结尾）。
+        /// </summary>
+        /// <param name="data">要判断的数据对象。</param>
+        /// <returns>是否为 ViewModel。</returns>
+        public bool Match(object? data)
+        {
+            return data is ViewModelBase;
+        }
+    }
+}