使用多個字符串參數調用Post Web API？

Question

我們如何調用以下Web API？

[HttpPost]
public bool ValidateAdmin(string username, string password)
{
    return _userBusinessObject.ValidateAdmin(username, password);
}

我已經編寫了以下代碼，但無法正常工作404 (Not Found)

string url = string.Format("api/User/ValidateAdmin?password={0}", password);
HttpResponseMessage response = Client.PostAsJsonAsync(url, username).Result;
response.EnsureSuccessStatusCode();
return response.Content.ReadAsAsync<bool>().Result;

編輯：
我不確定網址是否正確，但顯示404 (Not Found)

Answer 1

我確實在類似情況下為我這樣做：

MediaTypeFormatter jsonFormatter = new JsonMediaTypeFormatter();
HttpContent datas = new ObjectContent<dynamic>(new { 
    username= username, 
    password= password}, jsonFormatter);

var client = new HttpClient();

client.DefaultRequestHeaders.Accept.Add(
    new MediaTypeWithQualityHeaderValue("application/json"));

var response = client.PostAsync("api/User/ValidateAdmin", datas).Result;

if (response != null)
{
    try
    {
        response.EnsureSuccessStatusCode();
        return response.Content.ReadAsAsync<bool>().Result;

        ...