HttpWebRequest on Compact Framework: The operation has timed-out
With .Net Compact Framework I developed an application that is doing a webrequest on interval bases. With the webrequest I sent data by providing some arguments inside the querystring. I am not interested in the response and therefore I did not assign the GetResponse() return value. I use the following code:
<br />
HttpWebRequest webRequest;</p>
<p>try<br />
{<br />
webRequest = WebRequest.Create("http://someurl.com/with.aspx?querystring=value");<br />
webRequest.Method = "GET";<br />
webRequest.KeepAlive = false;<br />
webRequest.GetResponse();<br />
}<br />
catch (Exception e){<br />
//Something goes wrong. Implement handling of this exception<br />
}<br />
finally {<br />
webRequest = null; //To clear up the webrequest<br />
}<br />
This code works… for only 2 times. The third time it is executed I get a: The operation has timed-out exception. It looks like the GetResponse() method keeps a connection (or socket) open which make it not possible to make new connection at the third time the method is executed. I solved this problem by assigning the GetResponse() value to a WebRequest variable and execute the Close() method inside the finally part of the try catch:
<br />
HttpWebRequest webRequest;<br />
WebResponse webResponse = null; //Need to assign this as null otherwise it does not compile<br />
try<br />
{<br />
webRequest = WebRequest.Create("http://someurl.com/with.aspx?querystring=value");<br />
webRequest.Method = "GET";<br />
webRequest.KeepAlive = false;<br />
webResponse = webRequest.GetResponse(); //Assign to webResponse<br />
}<br />
catch (Exception e){<br />
//Something goes wrong. Implement handling of this exception<br />
}<br />
finally {<br />
if(webResponse != null)<br />
{<br />
webResponse.Close(); //Close webresponse connection<br />
}</p>
<p> webResponse = null; //To clear up the webresponse<br />
webRequest = null; //To clear up the webrequest<br />
}<br />
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