如何解决如何从此 HTTP POST Respose
我承认我是使用 HTTP POST 的新手……但我认为我已经正确发送了 HTTP POST 请求,在我的远程 Web 端函数中处理了它并返回了响应。
DataTable _table = new DataTable("responseValues");
DataColumn ColumnToken = new DataColumn("token",typeof(string));_table.Columns.Add(ColumnToken);
DataColumn ColumnMessage = new DataColumn("message",typeof(string)); _table.Columns.Add(ColumnMessage);
DaTarow newRow = _table.NewRow();
newRow["token"] = _token;
newRow["message"] = responseMessage.ToString();
_table.Rows.Add(newRow);
//Create a new response object to return to the HTTPPost request
HttpResponseMessage response = new System.Net.Http.HttpResponseMessage(System.Net.HttpStatusCode.OK);
//Populate .Content with json formatted data
// use system.net.http.Json
JsonSerializerOptions _JsonSerializerOptions = new JsonSerializerOptions();
_JsonSerializerOptions.PropertyNameCaseInsensitive = true;
_JsonSerializerOptions.PropertyNamingPolicy = JsonNamingPolicy.CamelCase;
response.Content = JsonContent.Create(inputValue: _table,options: _JsonSerializerOptions,mediaType: new MediaTypeHeaderValue("application/json"));
响应内容如下所示。我已经爆炸了,所以我可以理解它:
{
"version":"1.1","content":
{
"objectType":"System.Data.DataTable,System.Data.Common,Version=4.2.2.0,Culture=neutral,PublicKeyToken=b03f5f7f11d50a3a","value":
[
{
"token":"3669a2a1d397e83bcda5","message":"CONNECTION STATE = OpenSUCCESS. Token Created."
}
],"headers":
[
{
"key":"Content-Type",value":
[
"application/json"
]
}
]
},"statusCode":200,"reasonPhrase":"OK","headers":[],"trailingHeaders":[],"requestMessage":null,"isSuccessstatusCode":true
}
我的问题是我无法提取(反序列化)已序列化到其中的数据表。 根据我的尝试,我得到了 2 个不同的结果: 如果我试试这个:
_JsonSerializerOptions.PropertyNameCaseInsensitive = True
_JsonSerializerOptions.PropertyNamingPolicy = JsonNamingPolicy.CamelCase
Dim Rslt As DataTable = Await _Login_postResponse.Content.ReadFromJsonAsync(type:=GetType(System.Data.DataTable),options:=_JsonSerializerOptions)
但是如果我试试这个
Dim strRslt = Await _Login_postResponse.Content.ReadAsstringAsync
Dim Rslt As DataTable = Newtonsoft.Json.JsonConvert.DeserializeObject(Of DataTable)(strRslt)
我收到此错误:
读取数据表时出现意外的 JSON 标记。预期的 StartArray,得到 起始对象。路径 '',第 1 行,位置 1。
我已查看此帖子:StackOverflow 并尝试在响应中发回数据集:
结果是这个 response.content:
DataSet _dset = new DataSet();
DataTable _table = new DataTable("responseValues");
DataColumn ColumnToken = new DataColumn("token",typeof(string)); _table.Columns.Add(ColumnMessage);
DaTarow newRow = _table.NewRow();
newRow["token"] = _token;
newRow["message"] = responseMessage.ToString();
_table.Rows.Add(newRow);
_dset.Tables.Add(_table);
//Create a new response object to return to the HTTPPost request
HttpResponseMessage response = new System.Net.Http.HttpResponseMessage(System.Net.HttpStatusCode.OK);
//Populate .Content with json formatted data
// use system.net.http.Json
JsonSerializerOptions _JsonSerializerOptions = new JsonSerializerOptions();
_JsonSerializerOptions.PropertyNameCaseInsensitive = true;
_JsonSerializerOptions.PropertyNamingPolicy = JsonNamingPolicy.CamelCase;
response.Content = JsonContent.Create(inputValue: _dset,mediaType: new MediaTypeHeaderValue("application/json"));
{
"version":"1.1","content":
{
"objectType":"System.Data.DataSet,"value":
{
"responseValues":
[
{
"token":"64b2818c1b2d9d09eb42","message":"CONNECTION STATE = OpenSUCCESS. Token Created."
}
]
},"headers":
[
{
"key":"Content-Type","value":
[
"application/json"
]
}
]
},"isSuccessstatusCode":true
}
如果我使用这种方法反序列化:
Dim strRslt = Await _Login_postResponse.Content.ReadAsstringAsync
Dim Rslt As DataTable = Newtonsoft.Json.JsonConvert.DeserializeObject(Of DataTable)(strRslt)
我收到此错误:
读取数据表时出现意外的 JSON 标记。预期的 StartArray,得到 String。路径“版本”,第 1 行,位置 16。
Dim Rslt As DataSet = Await _Login_postResponse.Content.ReadFromJsonAsync(type:=GetType(System.Data.DataSet),options:=_JsonSerializerOptions)
我做错了什么?
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