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HashTable in Web Service Messages   Related Types This message was discovered on ASPFriends.com 'aspngwebservices' list. KHALLERAN@hklaw.com Any idea why this code returns the following error? [WebMethod] public System.Collections.Hashtable GetUserInfo(string UserID) { System.Collections.Hashtable Info=new System.Collections.Hashtable(); Info.Add("FName","Kevin"); return Info; } Server Error in '/UserInfo' Application. _____ The type System.Collections.Hashtable is not supported because it implements IDictionary. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.NotSupportedException: The type System.Collections.Hashtable is not supported because it implements IDictionary. Source Error: Kevin A. Halleran Holland & Knight LLP Internet Programmer Reply to this message...        Tim and Anne Royal did you make sure to reference the System.Collections namespace in your file? using System.Web; using System.Collections; using System.Web.UI; etc etc... the system collections namespace isn't implicitly added to web services like it is non-code behind aspx files. i got tripped ont hat, too, until I added the reference as per above. Then, you should be able to use the Hashtable object *and* you don't have to preface it (instead of System.Collections.Hashtable, you can just use Hashtable if you prefer). tim ----- Original Message ----- From: Click here to reveal e-mail address To: aspngwebservices Sent: Monday, July 15, 2002 10:18 AM Subject: [aspngwebservices] HashTable in Web Service Any idea why this code returns the following error? [WebMethod] public System.Collections.Hashtable GetUserInfo(string UserID) { System.Collections.Hashtable Info=new System.Collections.Hashtable(); Info.Add("FName","Kevin"); return Info; } Server Error in '/UserInfo' Application. ------------------------------------------------------------------------------ The type System.Collections.Hashtable is not supported because it implements IDictionary. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.NotSupportedException: The type System.Collections.Hashtable is not supported because it implements IDictionary. Source Error: Kevin A. Halleran Holland & Knight LLP Internet Programmer | [aspngwebservices] member Click here to reveal e-mail address = YOUR ID | http://www.asplists.com/asplists/aspngwebservices.asp = JOIN/QUIT | http://www.asplists.com/search = SEARCH Archives Reply to this message...        KHALLERAN@hklaw.com Thank you for the response. Yes the collections reference is in my project. The code works from both a windows form and a web form. Just not from a web service. Any help would be appreciated. Kevin -----Original Message----- From: Tim and Anne Royal [mailto:Click here to reveal e-mail address] Sent: Monday, July 15, 2002 6:28 PM To: aspngwebservices Subject: [aspngwebservices] Re: HashTable in Web Service did you make sure to reference the System.Collections namespace in your file? using System.Web; using System.Collections; using System.Web.UI; etc etc... the system collections namespace isn't implicitly added to web services like it is non-code behind aspx files. i got tripped ont hat, too, until I added the reference as per above. Then, you should be able to use the Hashtable object *and* you don't have to preface it (instead of System.Collections.Hashtable, you can just use Hashtable if you prefer). tim ----- Original Message ----- From: Click here to reveal e-mail address <mailto:Click here to reveal e-mail address> To: aspngwebservices <mailto:Click here to reveal e-mail address> Sent: Monday, July 15, 2002 10:18 AM Subject: [aspngwebservices] HashTable in Web Service Any idea why this code returns the following error? [WebMethod] public System.Collections.Hashtable GetUserInfo(string UserID) { System.Collections.Hashtable Info=new System.Collections.Hashtable(); Info.Add("FName","Kevin"); return Info; } Server Error in '/UserInfo' Application. _____ The type System.Collections.Hashtable is not supported because it implements IDictionary. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.NotSupportedException: The type System.Collections.Hashtable is not supported because it implements IDictionary. Source Error: Kevin A. Halleran Holland & Knight LLP Internet Programmer | [aspngwebservices] member Click here to reveal e-mail address = YOUR ID | http://www.asplists.com/asplists/aspngwebservices.asp = JOIN/QUIT | http://www.asplists.com/search = SEARCH Archives | [aspngwebservices] member Click here to reveal e-mail address = YOUR ID | http://www.asplists.com/asplists/aspngwebservices.asp = JOIN/QUIT | http://www.asplists.com/search = SEARCH Archives Reply to this message...        Robert Chartier IDictionary cannot be serialized via XML, you will not be able to use the hastable for a parameter over web services. change the data type to something that can be serialized. At 10:33 AM 7/16/2002 -0400, you wrote: [Original message clipped] Robert Chartier Author and Developer 604-975-5590 Click here to reveal e-mail address http://www.aspalliance.com/nothingmn/ Reply to this message...        Tim and Anne Royal doh! sorry, i just remembered, you can't return a hashTable in a web service. you'll have to return an array instead. Web Services are quite limited in what they can return, and any of the collections based stuff can be used, but not returned. At least that's what it was for me when calling web services from GET or POST requests. SOAP may be richer in what types it can return, but definitely for the first two are limited. tim ----- Original Message ----- From: Click here to reveal e-mail address To: aspngwebservices Sent: Tuesday, July 16, 2002 7:33 AM Subject: [aspngwebservices] Re: HashTable in Web Service Thank you for the response. Yes the collections reference is in my project. The code works from both a windows form and a web form. Just not from a web service. Any help would be appreciated. Kevin -----Original Message----- From: Tim and Anne Royal [mailto:Click here to reveal e-mail address] Sent: Monday, July 15, 2002 6:28 PM To: aspngwebservices Subject: [aspngwebservices] Re: HashTable in Web Service did you make sure to reference the System.Collections namespace in your file? using System.Web; using System.Collections; using System.Web.UI; etc etc... the system collections namespace isn't implicitly added to web services like it is non-code behind aspx files. i got tripped ont hat, too, until I added the reference as per above. Then, you should be able to use the Hashtable object *and* you don't have to preface it (instead of System.Collections.Hashtable, you can just use Hashtable if you prefer). tim ----- Original Message ----- From: Click here to reveal e-mail address To: aspngwebservices Sent: Monday, July 15, 2002 10:18 AM Subject: [aspngwebservices] HashTable in Web Service Any idea why this code returns the following error? [WebMethod] public System.Collections.Hashtable GetUserInfo(string UserID) { System.Collections.Hashtable Info=new System.Collections.Hashtable(); Info.Add("FName","Kevin"); return Info; } Server Error in '/UserInfo' Application. ---------------------------------------------------------------------------- The type System.Collections.Hashtable is not supported because it implements IDictionary. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.NotSupportedException: The type System.Collections.Hashtable is not supported because it implements IDictionary. Source Error: Kevin A. Halleran Holland & Knight LLP Internet Programmer | [aspngwebservices] member Click here to reveal e-mail address = YOUR ID | http://www.asplists.com/asplists/aspngwebservices.asp = JOIN/QUIT | http://www.asplists.com/search = SEARCH Archives | [aspngwebservices] member Click here to reveal e-mail address = YOUR ID | http://www.asplists.com/asplists/aspngwebservices.asp = JOIN/QUIT | http://www.asplists.com/search = SEARCH Archives | [aspngwebservices] member Click here to reveal e-mail address = YOUR ID | http://www.asplists.com/asplists/aspngwebservices.asp = JOIN/QUIT | http://www.asplists.com/search = SEARCH Archives Reply to this message...     System.Collections.Hashtable System.Collections.IDictionary System.NotSupportedException Ad MBR BootFX Best-of-breed application framework for .NET projects, developed by Matthew Baxter-Reynolds and MBR IT

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