asmx webservice doesn't read postdata

asmx, asp.net, web-services, webforms

Solution

Adding this solved the problem

// goto beginning of the inputstream
HttpContext.Current.Request.InputStream.Position = 0;

// convert postdata to dictionary
string data = new StreamReader(HttpContext.Current.Request.InputStream).ReadToEnd();

For some reason the 'cursor' of the inputstream is on the last position and `ReadToEnd()` results in reading an empty string.

Problem

I have an .asmx webservice that works fine except it doesn't read prostdata. It looks like this: ``` namespace mynamespace.liby { [ScriptService] [WebService(Namespace = "http://tempuri.org/")] [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)] [System.ComponentModel.ToolboxItem(false)] public class json : System.Web.Services.WebService { [WebMethod] [ScriptMethod(ResponseFormat = ResponseFormat.Json)] public List<sp_tech_keywordSearch_Result> search() { const string KEY = "key"; var key = string.Empty; // convert postdata to dictionary // this piece of code works fine in my asp.net MVC controller but not here :-( string data = new StreamReader(HttpContext.Current.Request.InputStream).ReadToEnd(); Dictionary<string, string> postData = JsonConvert.DeserializeObject<Dictionary<string, string>>(data); if (postData.ContainsKey(KEY)) { key = postData[KEY]; } var db = new my_Entities(); var result = db.sp_myStoredProcedure(key); return result.ToList(); } } } ``` If I comment out the line ``` // if (postData.ContainsKey(KEY)) { key = postData[KEY]; } ``` the procedure is called without parameter and returns a list of values. But when I keep this line it throws an error saying `postData` is null. When i check it in debug mode I see that `data` is an empty string. I call this service with angular like this: ``` callService: function () { var postData = new Object(); postData.key =4; return $http({ method: 'POST', url: MY_SERVICE, data: postData }) .then(function (obj) { _Result = obj.data.d; return true; }, function (err) { _Result = []; console.log('serviceError'); return false; }); }, ``` My guess is that my code for reading postdata is wrong somehow. I have the same code running in an ASP.NET MVC controller and it works fine there. Does anyone have an idea on how to fix this?

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