!2497 feat(#I4WV52): add GetKeyValue method on Utility extension class

* refactor: 合并单元测试
* test: 增加单元测试
* feat: 增加缓存方法
* feat: 增加 Lambda 扩展方法获得 Key 标签属性值

src/BootstrapBlazor/Extensions/LambdaExtensions.cs

@@ -3,6 +3,7 @@
 // Website: https://www.blazor.zone or https://argozhang.github.io/
 
 using BootstrapBlazor.Components;
+using System.ComponentModel.DataAnnotations;
 using System.Linq.Expressions;
 using System.Reflection;
 
@@ -600,4 +601,24 @@ public static class LambdaExtensions
         return false;
     }
     #endregion
+
+    /// <summary>
+    /// 获得 指定模型标记 <see cref="KeyAttribute"/> 的属性值
+    /// </summary>
+    /// <typeparam name="TModel"></typeparam>
+    /// <typeparam name="TValue"></typeparam>
+    /// <returns></returns>
+    public static Expression<Func<TModel, TValue>> GetKeyValue<TModel, TValue>(TModel model)
+    {
+        var type = model is not null ? model.GetType() : typeof(TModel);
+        Expression<Func<TModel, TValue>> ret = _ => default!;
+        var property = type.GetRuntimeProperties().FirstOrDefault(p => p.IsDefined(typeof(KeyAttribute)));
+        if (property != null)
+        {
+            var param = Expression.Parameter(typeof(TModel));
+            var body = Expression.Property(Expression.Convert(param, type), property);
+            ret = Expression.Lambda<Func<TModel, TValue>>(Expression.Convert(body, typeof(TValue)), param);
+        }
+        return ret;
+    }
 }

src/BootstrapBlazor/Services/CacheManager.cs

@@ -301,6 +301,25 @@ internal class CacheManager : ICacheManager
         });
         invoker(model, value);
     }
+
+    /// <summary>
+    /// 获得 指定模型标记 <see cref="KeyAttribute"/> 的属性值
+    /// </summary>
+    /// <typeparam name="TModel"></typeparam>
+    /// <typeparam name="TValue"></typeparam>
+    /// <param name="model"></param>
+    /// <returns></returns>
+    public static TValue GetKeyValue<TModel, TValue>(TModel model)
+    {
+        var type = model is object o ? o.GetType() : typeof(TModel);
+        var cacheKey = ($"Lambda-GetKeyValue-{type.FullName}", typeof(TModel));
+        var invoker = Instance.GetOrCreate(cacheKey, entry =>
+        {
+            entry.SetDynamicAssemblyPolicy(type);
+            return LambdaExtensions.GetKeyValue<TModel, TValue>(model).Compile();
+        });
+        return invoker(model);
+    }
     #endregion
 
     #region Lambda Sort

src/BootstrapBlazor/Utils/Utility.cs

@@ -4,6 +4,7 @@
 
 using Microsoft.AspNetCore.Components;
 using Microsoft.AspNetCore.Components.Rendering;
+using System.ComponentModel.DataAnnotations;
 using System.Data;
 using System.Linq.Expressions;
 using System.Reflection;
@@ -31,6 +32,15 @@ public static class Utility
     /// <returns></returns>
     public static string GetDisplayName(Type modelType, string fieldName) => CacheManager.GetDisplayName(modelType, fieldName);
 
+    /// <summary>
+    /// 获得 指定模型标记 <see cref="KeyAttribute"/> 的属性值
+    /// </summary>
+    /// <typeparam name="TModel"></typeparam>
+    /// <typeparam name="TValue"></typeparam>
+    /// <param name="model"></param>
+    /// <returns></returns>
+    public static TValue GetKeyValue<TModel, TValue>(TModel model) => CacheManager.GetKeyValue<TModel, TValue>(model);
+
     /// <summary>
     /// 
     /// </summary>

test/UnitTest/Utils/UtilityTest.cs

@@ -18,6 +18,18 @@ public class UtilityTest : BootstrapBlazorTestBase
         };
     }
 
+    [Fact]
+    public void GetKeyValue_Ok()
+    {
+        var foo = new Foo() { Id = 1 };
+        var v = Utility.GetKeyValue<Foo, int>(foo);
+        Assert.Equal(1, v);
+
+        object foo1 = new Foo() { Id = 2 };
+        v = Utility.GetKeyValue<object, int>(foo1);
+        Assert.Equal(2, v);
+    }
+
     [Fact]
     public void GetPropertyValue_Ok()
     {