[英]Download file request returning JSON instead of file in ASP.NET Web API on server
[英]ASP .NET Web API Returning JSON file
我正在创建一个ASP.NET Web API服务端点,在该端点查询Oracle数据库并以JSON格式返回结果。
以下是我在Controller中使用的代码
public class SampleController : ApiController
{
public HttpResponseMessage Getdetails([FromUri] string[] id)
{
using (OracleConnection dbconn = new OracleConnection("DATA SOURCE=J;PASSWORD=C;PERSIST SECURITY INFO=True;USER ID=T"))
{
var inconditions = id.Distinct().ToArray();
var srtcon = string.Join(",", inconditions);
DataSet userDataset = new DataSet();
var strQuery = @"SELECT * from STCD_PRIO_CATEGORY where STPR_STUDY.STD_REF IN(" + srtcon + ")";
OracleCommand selectCommand = new OracleCommand(strQuery, dbconn);
OracleDataAdapter adapter = new OracleDataAdapter(selectCommand);
DataTable selectResults = new DataTable();
adapter.Fill(selectResults);
string result = JsonConvert.SerializeObject(selectResults);
string contentDisposition = "inline; filename=ProvantisStudyData.json";
//byte[] byteInfo = Encoding.ASCII.GetBytes(result);
HttpResponseMessage response = Request.CreateResponse(HttpStatusCode.OK, result, MediaTypeHeaderValue.Parse("application/json"));
response.Content.Headers.ContentDisposition = ContentDispositionHeaderValue.Parse(contentDisposition);
//response.Content.Headers.ContentLength = byteInfo.Length;
return response;
}
}
一切正常,但返回的结果格式如下
“ [{\\” CATEGORY \\“:\\”内部学习\\“,\\” SESSION_NUMBER \\“:7,\\” SESSION_START_DATE \\“:\\” 2015-02-13T00:00:00 \\“,\\” SESSION_START_TIME \\“: \\ “2015-02-13T10:33:59.288394 \\”,\\ “SESSION_END_DATE \\”:\\ “2015-02-13T00:00:00 \\”,\\ “SESSION_END_TIME \\”:\\“2015-02-13T12:11: 34 \\ “}]”
只是它会创建多余的引号和多余的转义字符( \\
)。 我是否需要进行操作以将其删除。
[{{“ CATEGORY”:“内部学习”,“ SESSION_NUMBER”:7,“ SESSION_START_DATE”:“ 2015-02-13T00:00:00”,“ SESSION_START_TIME”:“ 2015-02-13T10:33:59.288394”,“ SESSION_END_DATE “:” 2015-02-13T00:00:00" , “SESSION_END_TIME”: “2015-02-13T12:11:34”}]
那是因为您已经将数据序列化为JSON,然后尝试将其作为application/json
,这只会导致格式化程序将您的字符串转换为JSON格式的字符串。
所以基本上您正在将对象序列化为json字符串
[{{“ CATEGORY”:“内部学习”,“ SESSION_NUMBER”:7,“ SESSION_START_DATE”:“ 2015-02-13T00:00:00”,“ SESSION_START_TIME”:“ 2015-02-13T10:33:59.288394”,“ SESSION_END_DATE “:” 2015-02-13T00:00:00" , “SESSION_END_TIME”: “2015-02-13T12:11:34”}]
然后将json字符串序列化为序列化的json字符串
“ [{\\” CATEGORY \\“:\\”内部学习\\“,\\” SESSION_NUMBER \\“:7,\\” SESSION_START_DATE \\“:\\” 2015-02-13T00:00:00 \\“,\\” SESSION_START_TIME \\“: \\ “2015-02-13T10:33:59.288394 \\”,\\ “SESSION_END_DATE \\”:\\ “2015-02-13T00:00:00 \\”,\\ “SESSION_END_TIME \\”:\\“2015-02-13T12:11: 34 \\ “}]”
去掉..
string result = JsonConvert.SerializeObject(selectResults);
...,然后将selectResults
对象原样传递给响应,格式化程序将根据媒体类型进行其余操作。
//...other code removed for brevity
var response = Request.CreateResponse(HttpStatusCode.OK, selectResults, MediaTypeHeaderValue.Parse("application/json"));
ContentDispositionHeaderValue contentDisposition = null;
if (ContentDispositionHeaderValue.TryParse("inline; filename=ProvantisStudyData.json", out contentDisposition)) {
response.Content.Headers.ContentDisposition = contentDisposition;
}
return response;
例如,如果您将中介类型更改为xml,则响应将作为xml返回。
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