增加DataCollection.TryGetValue<T>()重载方法；

增加ApiRequestContext.TryGetArgument<T>()重载方法；

Author: xljiulang

WebApiClientCore/ApiRequestContext.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Diagnostics.CodeAnalysis;
 using System.Net.Http;
 
 namespace WebApiClientCore
@@ -65,6 +66,39 @@ public bool TryGetArgument(string parameterName, out object? value)
             return this.TryGetArgument(parameterName, StringComparer.Ordinal, out value);
         }
 
+        /// <summary>
+        /// 尝试根据参数名获取参数值
+        /// </summary>
+        /// <typeparam name="TValue"></typeparam>
+        /// <param name="parameterName">参数名</param> 
+        /// <param name="value">值</param>
+        /// <returns></returns>
+        public bool TryGetArgument<TValue>(string parameterName, [MaybeNull] out TValue value)
+        {
+            return this.TryGetArgument(parameterName, StringComparer.Ordinal, out value);
+        }
+
+        /// <summary>
+        /// 尝试根据参数名获取参数值
+        /// </summary>
+        /// <typeparam name="TValue"></typeparam>
+        /// <param name="parameterName">参数名</param>
+        /// <param name="comparer">比较器</param>
+        /// <param name="value">值</param>
+        /// <returns></returns>
+        public bool TryGetArgument<TValue>(string parameterName, StringComparer comparer, [MaybeNull] out TValue value)
+        {
+            if (this.TryGetArgument(parameterName, comparer, out var objValue) && objValue is TValue tValue)
+            {
+                value = tValue;
+                return true;
+            }
+
+            value = default;
+            return false;
+        }
+
+
         /// <summary>
         /// 尝试根据参数名获取参数值
         /// </summary>

WebApiClientCore/DataCollection.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Diagnostics;
+using System.Diagnostics.CodeAnalysis;
 using System.Linq;
 
 namespace WebApiClientCore
@@ -51,20 +52,36 @@ public bool ContainsKey(object key)
         }
 
         /// <summary>
-        /// 读取指定的键并强制转换为目标类型
+        /// 读取指定的键并尝试转换为目标类型
+        /// 失败则返回目标类型的default值
         /// </summary>
-        /// <typeparam name="T"></typeparam>
+        /// <typeparam name="TValue"></typeparam>
         /// <param name="key">键</param>
         /// <returns></returns>
-        public T Get<T>(object key)
+        [return: MaybeNull]
+        public TValue Get<TValue>(object key)
         {
-#nullable disable
-            if (this.TryGetValue(key, out var value))
+            this.TryGetValue<TValue>(key, out var value);
+            return value;
+        }
+
+        /// <summary>
+        /// 尝试获取值
+        /// </summary>
+        /// <typeparam name="TValue"></typeparam>
+        /// <param name="key">键</param>
+        /// <param name="value">值</param>
+        /// <returns></returns>
+        public bool TryGetValue<TValue>(object key, [MaybeNull] out TValue value)
+        {
+            if (this.TryGetValue(key, out var objValue) && objValue is TValue tValue)
             {
-                return value == null ? default : (T)value;
+                value = tValue;
+                return true;
             }
-            return default;
-#nullable enable
+
+            value = default;
+            return false;
         }
 
         /// <summary>

WebApiClientCore/System.Net.Http/HttpResponseMessageExtensions.cs

@@ -115,7 +115,7 @@ public static async Task SaveAsAsync(this HttpResponseMessage httpResponse, Stre
                 {
                     recvSize += length;
                     await destination.WriteAsync(buffer, 0, length, cancellationToken).ConfigureAwait(false);
-                    await destination.FlushAsync(cancellationToken);
+                    await destination.FlushAsync(cancellationToken).ConfigureAwait(false);
                 }
 
                 progressChanged.Invoke(new HttpProgress(fileSize, recvSize, isCompleted));