HttpClient PostAsync无效的帖子格式

Question

我正在尝试使用HttpClient的PostAsync登录网站; 但总是失败,当我使用WireShark跟踪连接时,我发现它错误地发布了数据

码

var content = new FormUrlEncodedContent(new[] 
{
    new KeyValuePair<string, string>("value1", data1),
    new KeyValuePair<string, string>("value2", data2),
    new KeyValuePair<string, string>("value3", data3)
});

要么

var content = new List<KeyValuePair<string, string>>
{
    new KeyValuePair<string, string>("value1", data1), 
    new KeyValuePair<string, string>("value2", data2), 
    new KeyValuePair<string, string>("value3", data3)
};

用法

httpClient.PostAsync(postUri, content)

期望

value1=123456&value2=123456&value3=123456

现实

//It adds strange += which makes the post fail...
value1=123456&value2+=123456&value3+=123456

Answer 1

我知道这有效：

var values = new List<KeyValuePair<string, string>>();

values.Add(new KeyValuePair<string, string>("Item1", "Value1"));
values.Add(new KeyValuePair<string, string>("Item2", "Value2"));
values.Add(new KeyValuePair<string, string>("Item3", "Value3"));

using (var content = new FormUrlEncodedContent(values))
{
    client.PostAsync(postUri, content).Result)
}