POST Rest API 調用 servicenow 使用 C#

Question

我正在嘗試將信息發送到 servicenow 中的事件隊列，如下所示。 但我收到的消息是

Id = 3，狀態 = WaitingForActivation，方法 =“{null}”，結果 =“{尚未計算}”。

有什么建議么？

public void PostEvent()     
{            
    string jsonFilePath = @"{""records"": [{""source"": ""Test"",""event_class"": ""Test Class"",""node"": ""test"",""message_key"": ""Test Incident for Test 1"",""severity"": ""5"",""description"": ""Test Incident for Test 1 Desc"",""additional_info"":'{""name"": ""Test System"",""short_des"": ""Test Incident for Test 1 Short Desc"",""ASSIGNMENT_GROUP"": ""xyz""}'}]}";
            
    var client = new HttpClient();
    client.BaseAddress = new Uri("https://abcdev.service-now.com/api/global/em/jsonv2");
    client.DefaultRequestHeaders.Clear();
    var jsonBody = (new JavaScriptSerializer()).Serialize(jsonFilePath);
    client.PostAsync("test", new StringContent(jsonBody, Encoding.UTF8, "application/json"));
}

Answer 1

您正在使用 Post 的異步版本而不等待它。 使您的方法async Task並await /或在最后一行之后放置.Result （這樣您就可以等待同步代碼中的異步調用）。 但是更喜歡 await 而不是 Result（錯誤處理不同）

Answer 2

您正在使用POST的異步版本，因此您必須將 function 創建為異步版本，並且必須等待 Post function。

public async Task PostEvent()     
{            
    string jsonFilePath = @"{""records"": [{""source"": ""Test"",""event_class"": ""Test Class"",""node"": ""test"",""message_key"": ""Test Incident for Test 1"",""severity"": ""5"",""description"": ""Test Incident for Test 1 Desc"",""additional_info"":'{""name"": ""Test System"",""short_des"": ""Test Incident for Test 1 Short Desc"",""ASSIGNMENT_GROUP"": ""xyz""}'}]}";
            
    var client = new HttpClient();
    client.BaseAddress = new Uri("https://abcdev.service-now.com/api/global/em/jsonv2");
    client.DefaultRequestHeaders.Clear();
    var jsonBody = (new JavaScriptSerializer()).Serialize(jsonFilePath);
    await client.PostAsync("test", new StringContent(jsonBody, Encoding.UTF8, "application/json"));
}

您還可以使用不帶 await 關鍵字的 post 的異步版本。 但為此你必須添加 aviator Result 。 這將等到請求執行完成。

public void PostEvent()     
{            
    string jsonFilePath = @"{""records"": [{""source"": ""Test"",""event_class"": ""Test Class"",""node"": ""test"",""message_key"": ""Test Incident for Test 1"",""severity"": ""5"",""description"": ""Test Incident for Test 1 Desc"",""additional_info"":'{""name"": ""Test System"",""short_des"": ""Test Incident for Test 1 Short Desc"",""ASSIGNMENT_GROUP"": ""xyz""}'}]}";

    var client = new HttpClient();
    client.BaseAddress = new Uri("https://abcdev.service-now.com/api/global/em/jsonv2");
    client.DefaultRequestHeaders.Clear();
    var jsonBody = (new JavaScriptSerializer()).Serialize(jsonFilePath);
    client.PostAsync("test", new StringContent(jsonBody, Encoding.UTF8, "application/json")).Result;
}