.NET Tutorials, Forums, Interview Questions And Answers
Welcome :Guest
Sign In
Win Surprise Gifts!!!

Top 5 Contributors of the Month
david stephan
Gaurav Pal
Post New Web Links

retrieving ListItem GUID with ListData.svc WCF service

Posted By:      Posted Date: October 28, 2010    Points: 0   Category :SharePoint



for a project I have to consume the ListData.svc service. I can retrieve the Lists and ListItems without any problem, but what i really need is the sharepoint unique identifier of a list or ListItem. I need these to pass through to an other custom sharepoint WCF service.

I can't use the sharepoint dll's because the application is a client side application that doesn't run on the sharepoint server itself.

Any ideas on how I can get those GUIDS?

View Complete Post

More Related Resource Links

Retrieving Managed Metadata fields with ListData.svc?

Hi I'm facing an issue by using the ListData.svc. I've created a custom ContentType with some fields of the Managed Metadata type, when accessing the ListData.svc the normal fields (Picture, Text etc.) are retrieved perfectly but the Managed Metadata fields are not part of the XML - how to retrieve these? I've googled for the last couple of hours with no luck and i'm a bit surprised if no one else have been facing this issue.   Thanks!

Windows Service Applications Tutorials

You can easily create services by creating an application that is installed as a service. For example, suppose you want to monitor performance counter data and react to threshold values. You could write a Windows Service application that listens to the performance counter data, deploy the application, and begin collecting and analyzing data.

WCF Tip: Using Properties in Service Contracts

you'll notice all of the Service Contracts are implemented with interfaces containing only methods. For the longest time I thought that's all that was supported, until I thought about it a little more. In C# land, properties are simply wrappers around a get method and set method, so why wouldn't we be able to use properties in a service contract? Well the answer is we can.

Realizing a Service-Oriented Architecture with .NET

This article is meant to be a practical discussion guide to building a .NET application in a service-oriented architecture. We will consider real-world goals, real-world obstacles, and experience-based solutions. I quickly concede the approaches discussed here are not exhaustive or infallible. This paper is focused on application development, not application integration. We will specifically consider architectural issues and component design issues.

The Potential of Web Services

Web Service for uploading documents into SharePoint

WS UploadService is a web service written for Microsoft Office SharePoint Server 2007 and Windows SharePoint Services 3.0 and is meant for uploading documents into SharePoint. I have just uploaded the zip file to GotDotNet.com so it will take some time before the zip file appears in the list of downloads. For the time being, you can download the zip file from the following location

Creating and Using an ASP.NET Web Service in Visual Web Developer

In addition to letting you create Web pages, Microsoft Visual Studio also lets you create Web services that use ASP.NET XML. Creating a Web service in Visual Studio is similar to creating a Web page. You can also use the Microsoft Visual Web Developer Web development tool to reference and use Web services that are in a Visual Web Developer solution, on your local computer or in a local or external UDDI directory. In this walkthrough, you will create the Web service in one solution and use it in another.

Tasks illustrated in this walkthrough include:

Creating a simple XML Web service in Visual Web Developer.

Creating a separate Web site that uses the Web service.

Retrieving a variable from a previous page



I'm looking to have a search page where a user will select an item from a listview, then then taken to another page that wil display data based on their original selection.

A user will type in a string and be presented with a list of usernames that are like that string, when they select a user name who's profile they would like to view I would like the page that they're taken to, to be that users profile.

How would I transfer the variable from the search page to the profile page, and when I work on the profile page, how can I access that variable?


AutoGenerateSelectButton="False" ignored when using Domain Service


Crosspost from RIA Services forum: http://forums.silverlight.net/forums/t/196466.aspx

I'm creating a Dynamic Data application in VS2010 and have recently switched to using a Domain Service to give greater control over the data presented to the client. I've noticed that the AutoGenerate<Action>Button attributes on my GridView are being ignored. The presence of the Edit and Delete buttons appear to be contingent on the existence of Update and Delete methods on the partial classes autogenerated in the Domain Service, but i'm not seeing how to control the generation of the Select button. Is there a way to control this from within the Domain Service class?

Error: Encountered multiple versions of the same assembly with GUID...try pre-importing...TlbImp


Hi!  Can someone tell me how I can troubleshoot the following error: "Encountered multiple versions of the same assembly with GUID...try pre-importing one of these assemblies".

The website developed in VS 2010 (.Net 3.5). This error is only received on my workstation.  Another person developing the site does not experience this issue at all.  Also, not sure if this matters, but on my workstation the 'Assembly Information...' dialog contains no values even though the 'AssemblyInfo.vb' file does specify values for the title, desc, etc.  The GUID being referenced in the error is the main project of the three projects within the solution.

I tried looking through the GAC, but do not see any references to the projects or DLLs in the VS solution and am not sure what else/where to look.

If I delete the copy of the solution on my local machine and pull down a copy from source control (AnkhSVN) the solution will build with no error.  Once I make any changes, such as adding a new aspx file, then the error is received.

I can provide any additional information needed.

Any framework for creating a job scheduler service?


Just curious to know if there was any official Microsoft code blocks, classes, or such for writing a service that runs other assemblies or WCF services?  That can be configured easily from a web page, pre-coded, for running tasks at certain times on certain recurring intervals?  I've already built one but am open to anything done better- which I'm sure there is.  Thanks!!!

Convert WCF service to self hosting application


 I created project as a  WCF Service application and now according to recuriment that needs to be converted as a self hosting application

How can i do this?

Converting WCF service app to Self hosting app?

WCF Data Service to JSON example? v4


I would like to take WCF Data Service and produce JSON output to consume on various mobile apps.

Can anyone give me a how-to on the JSON part?  I.e., what is different than normal XML outut?



Problem to obtain client IP on web service



I'm having problems to obtain the client IP on web service. Here's my scenario:

One server with Windows 2003, hosting the web service using .Net Framework 2.0, with IP and host name ServerTransaction.
Other server with Windows 2003, hosting a web application using .Net Framework 2.0, that consuming the web service on  ServerTransaction, with IP and host name ServerApplication.
Many other computers on the local network (IPs:,,, ...) acessing the web application on ServerApplication.

On the code of the web service I've tried to use HttpContext.Current.Request.UserHostAddress or HttpContext.Current.Request.ServerVariables("REMOTE_ADDR") or HttpContext.Current.Request.ServerVariables("HTTP_X_FORWARDED_FORR"), but always I can only get the IP of ServerApplication (

Any idea or tip?

Thanks and sorry for my bad english.

A lengthy operation in an ASP.NET web service


I've built an ASP.NET web service with .NET 2.0 (an asmx file). I invoke a web service method using Ajax. The method takes a substantial amount of time to execute (5 minutes to 1 hour). I believe it's not a good idea to "hang" the web request for so long.
I'm wondering if the web service method could spawn an additional process which in turn would execute the lengthy operation and notify the web service once the operation is completed.
Are there any good practices regarding this kind of functionality?


.Net Frameword 4 SOAP Web Service



We want to upgrade from VS2005 to VS2010. Before we do that, I would like some clarity about some things.


Can we build typical SOAP webservices with the 4 Framework as I could with 2.0?


Would a WCF Service allow me to have both REST/SOAP services in one application?


Is Framework 4 ONLY for REST services and I need to stick to 3.5 for SOAP?


I downloaded the free Web Developer 2010, but I cannot seem to get anywhere trying to figure this out.


Thanks for any input.





problem compiling web service


Using Visual Studio 2010.

I created a webservice GetDemographicData asmx, GetDemographicData asmx.cs and then used wsdl to create a proxy, then used csc.exe to create dll.

first time when I generate proxy, it looks and works fine, but when I make some changes to my webservice and regenerate proxy the following problems occur:

1.I lost the function: public DataSet Get_GetDemographicData(string CaseNum, int Version)
2. The namespace changed to my-labs

Why?? Please see my code below:

Any help is appreciated. Thanks.

<%@ WebService Language="C#" CodeBehind="~/App_Code/GetDemographicData.cs" Class="GetDemographicData" %>
GetDemographicData.cs was created under AppDataas follows:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Services;
using System.Configuration;
using System.Data.SqlClient;
using System.Data;

/// <summary>
/// Summary description for GetCurrentReportVersion
/// </summary>
[WebService(Namespace = "http://localhost/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
// To allow this Web Service to be called from script, using ASP.NET AJAX, u

problem in consuming WCF service through Window application


I have a silverlight application and WCF service all made in VS 2010 , i had hosted my site to web server which contain Window 2008 and IIS 7.0

now the problem is i have another application which is a window application developed in VS2008 , when i try to add the service reference it gives me error


The document at the url was not recognized as a known document type.

The error message from each known type may help you fix the problem:

- Report from 'DISCO Document' is 'There was an error downloading 'http://dev_qa.emspa.com/HRDev3/Service.svc?disco'.'.

  - The request failed with HTTP status 400: Bad Request.

- Report from 'WSDL Document' is 'The document format is not recognized (the content type is 'text/html; charset=UTF-8').'.

- Report from '' is 'The document format is not recognized (the content type is 'text/html; charset=UTF-8').'.

- Report from 'XML Schema' is 'The document format is not recognized (the content type is 'text/html; charset=UTF-8').'.

Metadata contains a reference that cannot be resolved: ''.

Content Type application/soap+xml; charset

ASP.NetWindows Application  .NET Framework  C#  VB.Net  ADO.Net  
Sql Server  SharePoint  Silverlight  Others  All   

Hall of Fame    Twitter   Terms of Service    Privacy Policy    Contact Us    Archives   Tell A Friend