fix #270

Author: xljiulang

WebApiClientCore.Test/Implementations/HttpApiRequestMessageTest.cs

@@ -1,9 +1,7 @@
 using System;
-using System.Text;
 using System.Threading.Tasks;
 using WebApiClientCore.Exceptions;
 using WebApiClientCore.Implementations;
-using WebApiClientCore.Internals;
 using Xunit;
 
 namespace WebApiClientCore.Test.Implementations
@@ -112,9 +110,9 @@ public async Task AddFormFiledAsyncTest()
         [Fact]
         public async Task AddFormDataTextTest()
         {
-            string get(string name, string value)
+            static string get(string name, string value)
             {
-                return $@"Content-Disposition: form-data; name=""{name}""{"\r\n\r\n"}{HttpUtil.UrlEncode(value, Encoding.UTF8)}";
+                return $@"Content-Disposition: form-data; name=""{name}""{"\r\n\r\n"}{value}";
             }
 
             var reqeust = new HttpApiRequestMessageImpl();
@@ -130,5 +128,19 @@ string get(string name, string value)
             Assert.Contains(get("age", "18"), body);
             Assert.Equal("multipart/form-data", reqeust.Content.Headers.ContentType!.MediaType);
         }
+         
+
+        [Fact]
+        public void AddFormDataTextEmptyCollectionTest()
+        {
+            var reqeust = new HttpApiRequestMessageImpl
+            {
+                Method = System.Net.Http.HttpMethod.Post,
+                RequestUri = new Uri("http://webapiclient.com")
+            };
+
+            reqeust.AddFormDataText([]);
+            Assert.Null(reqeust.Content);
+        }
     }
 }

WebApiClientCore/Implementations/HttpApiRequestMessageImpl.cs

@@ -180,13 +180,13 @@ public override void AddFormDataText(IEnumerable<KeyValue> keyValues)
             if (this.Content is not MultipartContent httpContent)
             {
                 httpContent = new FormDataContent();
-                this.Content = httpContent;
             }
 
             foreach (var keyValue in keyValues)
             {
                 var textContent = new FormDataTextContent(keyValue);
                 httpContent.Add(textContent);
+                this.Content = httpContent;
             }
         }