ApiParameterContext增加ParameterName属性；

ApiRequestContext增加TryGetArgument方法；

Author: xljiulang

WebApiClientCore.Extensions.JsonRpc/Internals/JsonRpcParameters.cs

@@ -22,7 +22,7 @@ public object ToJsonRpcParams(JsonRpcParamsStyle paramsStyle)
             }
             else
             {
-                return this.ToDictionary(item => item.Parameter.Name, item => item.ParameterValue);
+                return this.ToDictionary(item => item.ParameterName, item => item.ParameterValue);
             }
         } 
     }

WebApiClientCore/ApiParameterContext.cs

@@ -10,31 +10,43 @@ namespace WebApiClientCore
     public class ApiParameterContext : ApiRequestContext
     {
         /// <summary>
-        /// 参数索引
+        /// 获取参数描述
         /// </summary>
-        private readonly int index;
+        public ApiParameterDescriptor Parameter { get; }
 
         /// <summary>
-        /// 获取参数描述
+        /// 获取参数名
         /// </summary>
-        public ApiParameterDescriptor Parameter => this.ApiAction.Parameters[index];
+        public string ParameterName => this.Parameter.Name;
 
         /// <summary>
         /// 获取参数值
         /// </summary>
-        public object? ParameterValue => this.Arguments[index];
+        public object? ParameterValue => this.Arguments[this.Parameter.Index];
+
 
         /// <summary>
         /// Api参数上下文
         /// </summary>
         /// <param name="context">上下文</param>
         /// <param name="parameterIndex">参数索引</param>
         public ApiParameterContext(ApiRequestContext context, int parameterIndex)
+            : this(context, context.ApiAction.Parameters[parameterIndex])
+        {
+        }
+
+        /// <summary>
+        /// Api参数上下文
+        /// </summary>
+        /// <param name="context">上下文</param>
+        /// <param name="parameter">参数描述</param>
+        public ApiParameterContext(ApiRequestContext context, ApiParameterDescriptor parameter)
             : base(context.HttpContext, context.ApiAction, context.Arguments, context.Properties)
         {
-            this.index = parameterIndex;
+            this.Parameter = parameter;
         }
 
+
         /// <summary>
         /// 序列化参数值为utf8编码的Json
         /// </summary>
@@ -108,7 +120,7 @@ public IList<KeyValue> SerializeToKeyValues()
             return this.HttpContext
                 .ServiceProvider
                 .GetKeyValueSerializer()
-                .Serialize(this.Parameter.Name, this.ParameterValue, options);
+                .Serialize(this.ParameterName, this.ParameterValue, options);
         }
     }
 }

WebApiClientCore/ApiRequestContext.cs

@@ -1,4 +1,5 @@
-using System.Net.Http;
+using System;
+using System.Net.Http;
 
 namespace WebApiClientCore
 {
@@ -53,6 +54,39 @@ protected ApiRequestContext(HttpContext httpContext, ApiActionDescriptor apiActi
             this.Properties = properties;
         }
 
+        /// <summary>
+        /// 尝试根据参数名获取参数值
+        /// </summary>
+        /// <param name="parameterName">参数名</param> 
+        /// <param name="value">值</param>
+        /// <returns></returns>
+        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>
+        /// <param name="parameterName">参数名</param>
+        /// <param name="comparer">比较器</param>
+        /// <param name="value">值</param>
+        /// <returns></returns>
+        public bool TryGetArgument(string parameterName, StringComparer comparer, out object? value)
+        {
+            for (var i = 0; i < this.ApiAction.Parameters.Count; i++)
+            {
+                if (comparer.Equals(parameterName, this.ApiAction.Parameters[i].Name))
+                {
+                    value = this.Arguments[i];
+                    return true;
+                }
+            }
+
+            value = null;
+            return false;
+        }
+
         /// <summary>
         /// 返回请求使用的HttpCompletionOption
         /// </summary> 

WebApiClientCore/Attributes/FormDataTextAttribute.cs

@@ -69,7 +69,7 @@ public override Task OnRequestAsync(ApiRequestContext context)
         /// <returns></returns>
         public Task OnRequestAsync(ApiParameterContext context)
         {
-            context.HttpContext.RequestMessage.AddFormDataText(context.Parameter.Name, context.ParameterValue?.ToString());
+            context.HttpContext.RequestMessage.AddFormDataText(context.ParameterName, context.ParameterValue?.ToString());
             return Task.CompletedTask;
         }
     }

WebApiClientCore/Attributes/FormFieldAttribute.cs

@@ -68,7 +68,7 @@ public override async Task OnRequestAsync(ApiRequestContext context)
         /// <returns></returns>
         public async Task OnRequestAsync(ApiParameterContext context)
         {
-            await context.HttpContext.RequestMessage.AddFormFieldAsync(context.Parameter.Name, context.ParameterValue?.ToString()).ConfigureAwait(false);
+            await context.HttpContext.RequestMessage.AddFormFieldAsync(context.ParameterName, context.ParameterValue?.ToString()).ConfigureAwait(false);
         }
     }
 }

WebApiClientCore/Attributes/ParameterAttributes/JsonFormDataTextAttribute.cs

@@ -16,7 +16,7 @@ public class JsonFormDataTextAttribute : ApiParameterAttribute
         public sealed override Task OnRequestAsync(ApiParameterContext context)
         {
             var json = context.SerializeToJson();
-            var fieldName = context.Parameter.Name;
+            var fieldName = context.ParameterName;
             var fildValue = Encoding.UTF8.GetString(json);
             context.HttpContext.RequestMessage.AddFormDataText(fieldName, fildValue);
 

WebApiClientCore/Attributes/ParameterAttributes/JsonFormFieldAttribute.cs

@@ -16,7 +16,7 @@ public class JsonFormFieldAttribute : ApiParameterAttribute
         public sealed override async Task OnRequestAsync(ApiParameterContext context)
         {
             var json = context.SerializeToJson();
-            var fieldName = context.Parameter.Name;
+            var fieldName = context.ParameterName;
             var fildValue = Encoding.UTF8.GetString(json);
             await context.HttpContext.RequestMessage.AddFormFieldAsync(fieldName, fildValue).ConfigureAwait(false);
         }

WebApiClientCore/Attributes/ParameterAttributes/UriAttribute.cs

@@ -21,7 +21,7 @@ public override Task OnRequestAsync(ApiParameterContext context)
         {
             if (context.ParameterValue == null)
             {
-                throw new ArgumentNullException(context.Parameter.Name);
+                throw new ArgumentNullException(context.ParameterName);
             }
 
             if (context.Parameter.Index > 0)

WebApiClientCore/BuildInProxies/Invokers/ContextInvoker.cs

@@ -76,7 +76,7 @@ private static InvokeDelegate<ApiRequestContext> BuildRequestHandler()
             {
                 foreach (var parameter in context.ApiAction.Parameters)
                 {
-                    var ctx = new ApiParameterContext(context, parameter.Index);
+                    var ctx = new ApiParameterContext(context, parameter);
                     foreach (var attr in parameter.Attributes)
                     {
                         await attr.OnRequestAsync(ctx).ConfigureAwait(false);

WebApiClientCore/Parameters/FormDataFile.cs

@@ -94,7 +94,7 @@ public FormDataFile(Func<Stream> streamFactory, string? fileName)
         public Task OnRequestAsync(ApiParameterContext context)
         {
             var stream = this.streamFactory();
-            context.HttpContext.RequestMessage.AddFormDataFile(stream, context.Parameter.Name, this.EncodedFileName, this.ContentType);
+            context.HttpContext.RequestMessage.AddFormDataFile(stream, context.ParameterName, this.EncodedFileName, this.ContentType);
             return Task.CompletedTask;
         }