You should not use Session in ASMX web services or any web service for that matter. It goes against best practices and therefore you should rethink the design. Can you explain why Session is required?
Keep in mind, Session uses state on the client (cookie) and the server (memory). The cookie unlocks the user's memory location. You need to pass the cookie on each and every request from the client. This means the client must persist the data.
IMHO, if the client is already persisting the data then there is no reason to use Session as you are storing the same data in two different locations.
i thought the coding above can work inside the .asmx page but actually no.
my question is how to call session in .asmx page ?
According to your code, I create a sample using the following code, it seems that
the web service (.asmx page) and the web page should in the same project.
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[System.ComponentModel.ToolboxItem(false)]
// To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line.
[System.Web.Script.Services.ScriptService]
public class WebService1 : System.Web.Services.WebService
{
[WebMethod(EnableSession =true)]
public string SayHello(string name)
{
string datetime = "Null";
if (Session["Date"] != null)
datetime = Session["Date"].ToString();
return string.Format("Hello {0}, Login time: {1}", name, datetime);
}
}
The screenshot as below:
Besides, if you want to share the session value from different project, I suggest you could try to use DataBase.
Best regards,
Dillion
MSDN Community Support
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how to call session in .asmx page ?
Aug 07, 2017 07:29 AM|wibowowiwit|LINK
Hi guys,
in general we can call session using this code :
i thought the coding above can work inside the .asmx page but actually no.
my question is how to call session in .asmx page ?
Thank You & Regards,
Wibowo Wiwit
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Re: how to call session in .asmx page ?
Aug 07, 2017 07:40 AM|XIII|LINK
Hi,
should be
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Re: how to call session in .asmx page ?
Aug 07, 2017 07:56 AM|wibowowiwit|LINK
Hi Kris,
thank for you answer.
it does't work.
i also add [WebMethod(EnableSession = true)]
but does't work to get session.
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Re: how to call session in .asmx page ?
Aug 07, 2017 08:03 AM|XIII|LINK
Hi,
What error do you get?
Also check if you get the needed cookie for the session in your browser. You can make use of the F12 tools of your browser of choice to look that up.
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Re: how to call session in .asmx page ?
Aug 07, 2017 11:29 AM|mgebhard|LINK
You should not use Session in ASMX web services or any web service for that matter. It goes against best practices and therefore you should rethink the design. Can you explain why Session is required?
Keep in mind, Session uses state on the client (cookie) and the server (memory). The cookie unlocks the user's memory location. You need to pass the cookie on each and every request from the client. This means the client must persist the data.
IMHO, if the client is already persisting the data then there is no reason to use Session as you are storing the same data in two different locations.
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Re: how to call session in .asmx page ?
Aug 10, 2017 08:38 AM|Zhi Lv - MSFT|LINK
Hi Wibowo Wiwit,
According to your code, I create a sample using the following code, it seems that the web service (.asmx page) and the web page should in the same project.
Code in web page:
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script> <script type="text/javascript"> $(function () { $("#Button1").click(function () { $.ajax({ type: "POST", url: "../Web_Service/WebService1.asmx/SayHello", data: '{name: "' + "AAA" + '"}', contentType: "application/json; charset=utf-8", dataType: "json", success: function (response) { $("#div_MethondResult").html(response.d); }, failure: function (response) { $("#div_MethondResult").html(response.d); } }); return false; }); }); </script> <asp:Button ID="Button1" runat="server" Text="Button" /> <div id="div_MethondResult"> </div>Code in web page code behind:
protected void Page_Load(object sender, EventArgs e) { Session["Date"] = DateTime.Now.ToString(); }Code in web Service:
[WebService(Namespace = "http://tempuri.org/")] [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)] [System.ComponentModel.ToolboxItem(false)] // To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line. [System.Web.Script.Services.ScriptService] public class WebService1 : System.Web.Services.WebService { [WebMethod(EnableSession =true)] public string SayHello(string name) { string datetime = "Null"; if (Session["Date"] != null) datetime = Session["Date"].ToString(); return string.Format("Hello {0}, Login time: {1}", name, datetime); } }The screenshot as below:
Besides, if you want to share the session value from different project, I suggest you could try to use DataBase.
Best regards,
Dillion
Please remember to click "Mark as Answer" the responses that resolved your issue.
If you have any compliments or complaints to MSDN Support, feel free to contact MSDNFSF@microsoft.com.