Comment Feed for Channel 9 - Building a Custom eBay Watch List Using the SOAP API http://ecn.channel9.msdn.com/o9/c4f/images/912397_100.jpg Channel 9 - Building a Custom eBay Watch List Using the SOAP API   Keeping a track on changes on eBay using its web service. Alan Lewis Alan Lewis Difficulty: Easy Time Required: 1-3 hours Cost: Free Software: Visual Studio Express Editions, eBay web service Hardware: Download: C# Download VB Download If you're like me, you're always keeping an eye on what's happening on eBay. Whenever I find something that I'm interested in tracking, I use eBay's Watch List feature to remember it for me. However, I find when I'm watching lots of items it's not so easy to sort, filter, and display them as I want. That's where eBay Web Services comes in. What I did was write a program to retrieve all my watch list items using SOAP. Now I have complete control to customize the display and add the feature I want to the interface. In this article I'll walk you how I did this using ASP.NET 2.0. You'll learn the basics of eBay Web Services and see how easy it is to customize eBay. Getting Registered with eBay To get started, register with the eBay Developers Program. Signing up for the program gives you access to the Sandbox, eBay's test environment that allows you to test your applications before taking them live. For this example, we want to pull down the real eBay Watch List data, so you need to get access to eBay's production environment. Register for access to the production eBay environment by submitting the Self-Certification Form. Once you complete this form you'll receive an email with instructions on how to retrieve your production developer keys. Follow those instructions, and once you've retrieved your keys save them in a text file for later use. Once you have access to the production environment, create an authentication token for your eBay username by going to http://cgi1.ebay.com/aw-cgi/eBayISAPI.dll?RegisterShow&ru=http%3A//www.ebay.com. (Sign up for eBay first if you haven't done so.) eBay Web Services uses authentication tokens for user authentication to keep your user data secure. This system allows authorized third party applications to make Web Services calls on your behalf without those third parties having access to your eBay username and password. Use the Single User Authentication Token tool to create an authentication token for your test user. In the tool, select the Production environment and enter the production developer keys you retrieved earlier. Go through the flow, and when you're done save the authentication token in the same place as you saved your developer keys. Accessing the eBay Web Service Now that you have all of that stuff out of the way, we're ready to go. eBay offers access to its web services through SOAP, XML, SDKs for .NET and Java, and even a REST API. For this example we'll be using the SOAP API. eBay exposes a WSDL file that you use to generate wrapper code for the SOAP API. In Visual Studio 2005 or Visual Web Developer 2005 Express Edition, first create a new Web Site, and then import the eBay WSDL file by right-clicking the web site root in the Solution Explorer, then selecting Add Web Reference...: In the Add Web Reference dialog, load the WSDL URL: http://developer.ebay.com/webservices/latest/eBaySvc.wsdl (Click image to zoom) It takes a few minutes to load the WSDL and generate the stubs from it. Once the WSDL is loaded, click Add Reference. If you get impatient with this process, just think: all this generated code is saving me time! A Custom Watch List Web Form The example we are creating displays the contents of your eBay watch list in a simple table. Create a new Web Form, and in the <div> element insert the following table: <asp:Table BorderWidth="1" BorderStyle="Solid" ID="Table1" GridLines="Both" runat="server"> <asp:TableRow> <asp:TableCell Text="Time Left" Width="90" Font-Bold="true" HorizontalAlign="Center"></asp:TableCell> <asp:TableCell Text="Title" Width="120" Font-Bold="true"> </asp:TableCell> <asp:TableCell Text="Price" Width="65" Font-Bold="true" HorizontalAlign="Center"></asp:TableCell> <asp:TableCell Text="Item ID" Width="80" Font-Bold="true" HorizontalAlign="Center"></asp:TableCell> </asp:TableRow></asp:Table>  The table headers are declared in the markup. The rest of the table rows with the watch list data will be added dynamically once the web service call is made. The generated code allows you to make calls to any of the 100+ methods exposed by the eBay SOAP API. Once you have figured out how to make one eBay Web Service call, the rest is easy. The Page_Load method in the code behind file contains the following code that sets up the call (you'll find the complete code in the download that accompanies this article): Visual C# string endpoint = "https://api.ebay.com/wsapi";string callName = "GetMyeBayBuying";string siteId = "0";string appId = "YOUR_APPID"; // use your app ID string devId = "YOUR_DEVID"; // use your dev ID string certId = "YOUR_CERTIFICATE"; // use your cert ID string version = "437";// Build the request URL string requestURL = endpoint + "?callname=" + callName + "&siteid=" + siteId + "&appid=" + appId + "&version=" + version + "&routing=default";// Create the service eBayAPIInterfaceService service = new eBayAPIInterfaceService();// Assign the request URL to the service locator. service.Url = requestURL;// Set credentials service.RequesterCredentials = new CustomSecurityHeaderType();service.RequesterCredentials.eBayAuthToken = "YOUR_TOKEN"; // use your token service.RequesterCredentials.Credentials = new UserIdPasswordType();service.RequesterCredentials.Credentials.AppId = appId;service.RequesterCredentials.Credentials.DevId = devId;service.RequesterCredentials.Credentials.AuthCert = certId; Visual Basic Dim endpoint As String = "https://api.ebay.com/wsapi"Dim callName As String = "GetMyeBayBuying" Dim siteId As String = "0"Dim appId As String = "YOUR_APPID" 'TODO: Enter your AppID Dim devId As String = "YOUR_DEVID" 'TODO: Enter your DevID Dim certId As String = "YOUR_CERTIFICATE" 'TODO: Enter your CertIDDim version As String = "437"' Build the request URL Dim requestURL As String = endpoint _ & "?callname=" & callName _ & "&siteid=" & siteId _ & "&appid=" & appId _ & "&version=" & version _ & "&routing=default"' Create the service Dim service As New eBayAPIInterfaceService()With service ' Assign the request URL to the service locator. .Url = requestURL ' Set credentials .RequesterCredentials = New CustomSecurityHeaderType() .RequesterCredentials.eBayAuthToken = "YOUR_TOKEN" 'TODO: Enter your production token .RequesterCredentials.Credentials = New UserIdPasswordType() With .RequesterCredentials.Credentials .AppId = appId .DevId = devId .AuthCert = certId End WithEnd With Replace the "YOUR" strings with the developer keys and authentication token that you retrieved earlier. This code sets the SOAP header with the authentication information and creates the URL parameters that are passed in. The one line in this code that will change from call to call is this: Visual C#  string callName = "GetMyeBayBuying"; Visual Basic Dim callName As String = "GetMyeBayBuying" For whatever call you are making, set the callName accordingly. The GetMyeBayBuying call retrieves all sorts of information about items you have purchased, items in your watch list, items you are bidding on, and more. The call to GetMyeBayBuying is very simple: Visual C#  // Make the call to GetMyeBayBuying GetMyeBayBuyingRequestType buyingRequest = new GetMyeBayBuyingRequestType();ItemListCustomizationType watchListOptions = new ItemListCustomizationType();watchListOptions.Sort = ItemSortTypeCodeType.TimeLeft;buyingRequest.WatchList = watchListOptions;buyingRequest.Version = version;GetMyeBayBuyingResponseType buyingResponse = service.GetMyeBayBuying(buyingRequest);ItemType[] items = buyingResponse.WatchList.ItemArray; Visual Basic ' Make the call to GetMyeBayBuying Dim buyingRequest As New GetMyeBayBuyingRequestType()Dim watchListOptions As New ItemListCustomizationType()watchListOptions.Sort = ItemSortTypeCodeType.TimeLeftbuyingRequest.WatchList = watchListOptionsbuyingRequest.Version = versionDim buyingResponse As GetMyeBayBuyingResponseType = _ service.GetMyeBayBuying(buyingRequest)Dim items() As ItemType = buyingResponse.WatchList.ItemArray The instance of GetMyeBayBuyingRequestType contains the call input options. To specify that we want to retrieve the contents of the watch list, we set the WatchList property with the ItemListCustomizationType options that we have created. We also set the Version property to the same version string as we are passing in the URL. The eBayAPIInterfaceService object contains a method for each call exposed by the SOAP API, and each method takes a "request type" object as a parameter. We pass in the request object that we've created and set the result to an instance of GetMyeBayBuyingResponseType. Finally, we extract the watch list items from the WatchList.ItemArray property of the response object, and set it to an array of ItemType. Once we have retrieved the items, it is up to us to display the information we want or make further calculations: Visual C#  // Add table rowsfor (int i = 0; i < items.Length; i++){ TableCell timeLeftCell = new TableCell(); DateTime endTime = items[i].ListingDetails.EndTime; DateTime now = DateTime.Now; // Display that the item has ended, or how much time is left if (endTime < now) { timeLeftCell.Text = "Ended"; } else { TimeSpan timeLeft = endTime - now; string timeLeftDisplay = ""; int days = timeLeft.Days; if (days > 0) timeLeftDisplay += days.ToString() + " days, "; int hours = timeLeft.Hours; if (hours > 0) timeLeftDisplay += hours.ToString() + " hours"; int minutes = timeLeft.Minutes; if (minutes > 0 && days == 0) timeLeftDisplay += ", " + minutes.ToString() + " min"; int seconds = timeLeft.Seconds; if (days == 0 && hours == 0) timeLeftDisplay += ", " + seconds.ToString() + " sec"; timeLeftCell.Text = timeLeftDisplay; } // Display the item title TableCell titleCell = new TableCell(); titleCell.Text = items[i].Title; // Display the current price TableCell currentPriceCell = new TableCell(); currentPriceCell.Text = items[i].SellingStatus.CurrentPrice.Value.ToString(); // Display the Item ID TableCell itemIDCell = new TableCell(); itemIDCell.Text = "<a href=\"http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=" + items[i].ItemID + "\">" + items[i].ItemID + "</a>"; TableRow row = new TableRow(); if ((i % 2) == 1) { row.BackColor = System.Drawing.Color.LightGray; } row.Cells.Add(timeLeftCell); row.Cells.Add(titleCell); row.Cells.Add(currentPriceCell); row.Cells.Add(itemIDCell); Table1.Rows.Add(row); } Visual Basic ' Add table rowsFor i As Integer = 0 To items.Length - 1 Step i + 1 Dim timeLeftCell As New TableCell() Dim endTime As DateTime = items(i).ListingDetails.EndTime Dim now As DateTime = DateTime.Now ' Display that the item has ended, or how much time is left If endTime < now Then timeLeftCell.Text = "Ended" Else Dim timeLeft As TimeSpan = endTime - now Dim timeLeftDisplay As String = String.Empty Dim days As Integer = timeLeft.Days If days > 0 Then timeLeftDisplay &= days.ToString() & " days, " End If Dim hours As Integer = timeLeft.Hours If hours > 0 Then timeLeftDisplay &= hours.ToString() & " hours" End If Dim minutes As Integer = timeLeft.Minutes If minutes > 0 And days = 0 Then timeLeftDisplay &= ", " & minutes.ToString() & " min" End If Dim seconds As Integer = timeLeft.Seconds If days = 0 And hours = 0 Then timeLeftDisplay &= ", " & seconds.ToString() & " sec" End If timeLeftCell.Text = timeLeftDisplay End If ' Display the item title Dim titleCell As New TableCell() titleCell.Text = items(i).Title ' Display the current price Dim currentPriceCell As New TableCell() currentPriceCell.Text = items(i).SellingStatus.CurrentPrice.Value.ToString() ' Display the Item ID Dim itemIDCell As New TableCell() itemIDCell.Text = "<a href=""http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=" _ & items(i).ItemID & """>" & items(i).ItemID & "</a>" Dim row As New TableRow() If (i Mod 2) = 1 Then row.BackColor = System.Drawing.Color.LightGray End If With row.Cells .Add(timeLeftCell) .Add(titleCell) .Add(currentPriceCell) .Add(itemIDCell) End With Table1.Rows.Add(row)Next The most complex code in this example actually has nothing to do with the web service call: the end time is passed back as a DateTime, but we want to show how much time is left for each item. First, for items that have not already ended, we calculate a TimeSpan between now and the end time. Then, we apply some simple heuristics on that TimeSpan to create a more friendly string representation. Modern platforms like .NET make it easy to get data from web services, so you'll often find yourself spending much more time manipulating the data that you've retrieved. Each cell in the table row is represented by a TableCell object. For each field in each item that we retrieve, a TableCell is created and its Text property is populated with what we want to display. We then create a TableRow object and call the Add method on its Cells property. And last, we add the row to the Rows property on the Table1 object that is declared on the form. That's it! With one simple form and little more than 100 lines of code, you have a working application that integrates with eBay Web Services to do something useful. In a future article I'll show you how to integrate other calls and use more sophisticated XML processing to add unique features not available in the standard eBay watch list. en Sat, 25 May 2013 00:58:52 GMT Sat, 25 May 2013 00:58:52 GMT Rev9 Re: Building a Custom eBay Watch List Using the SOAP API Looks like from the error you're attempting to subtract 2 date objects.

Switch to a DateTime object and you'll be able to do that.  Something along the lines of

DateTime.Now - start

posted by Clint

]]> http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633326004000000000 Fri, 07 Dec 2007 05:00:00 GMT http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633326004000000000 Clint Re: Building a Custom eBay Watch List Using the SOAP API i am getting "application name invalid"..error...i passed all four parameters i.e APPID,DEVID,CERTID and AUTHtOKEN...but it fires above error

posted by daivagna

]]> http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633335508000000000 Tue, 18 Dec 2007 05:00:00 GMT http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633335508000000000 daivagna Re: Building a Custom eBay Watch List Using the SOAP API @daivagna and @haojian jin:  are you sure you have eBayAuthToken property using your ebay auth token?

If you're still having problems contact us @ via the contact link at the top of the blog.  I'll email you from there.

posted by Clint

]]> http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633343284000000000 Thu, 27 Dec 2007 05:00:00 GMT http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633343284000000000 Clint Re: Building a Custom eBay Watch List Using the SOAP API I am meeting with the same problem with daivagna .

There is a error called "application name invalid".

posted by haojian jin

]]> http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633343284000000000 Thu, 27 Dec 2007 05:00:00 GMT http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633343284000000000 haojian jin Re: Building a Custom eBay Watch List Using the SOAP API Very Good Sample. its working fine. But can any body will help me to get the order Details using the same process ? i have tried alot but... i am not getting any response.

please help me. ...

posted by Ranjit

]]> http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633345876000000000 Sun, 30 Dec 2007 05:00:00 GMT http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633345876000000000 Ranjit Re: Building a Custom eBay Watch List Using the SOAP API Hi. I have a question. How can i finish the search function like the one in ebayDesktop.Which api can lead me there? Waiting for response . i will very appreciate your help if u can contact me @ email.

posted by haojian jin

]]> http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633351924000000000 Sun, 06 Jan 2008 05:00:00 GMT http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633351924000000000 haojian jin Re: Building a Custom eBay Watch List Using the SOAP API Does anybody tried this on Visual Studio 2008 ?  If I try to build it, the build hangs and takes 100% resources.

On 2005 eveything is OK.

posted by Victor

]]> http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633354516000000000 Wed, 09 Jan 2008 05:00:00 GMT http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633354516000000000 Victor Re: Building a Custom eBay Watch List Using the SOAP API @Victor:  This happened to me when I was adding the reference, but it built fine under VS 2008.  The ebay API takes a bit to download.  That could be it.  I think it took me about 15+ minutes when I did it.

posted by Clint

]]> http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633358836000000000 Mon, 14 Jan 2008 05:00:00 GMT http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633358836000000000 Clint Re: Building a Custom eBay Watch List Using the SOAP API 1) Hi! I am confuse with the callName.

string callName = "GetMyeBayBuying";

Where can i find the call name?

2) I had a "Application name invalid." Server error page.

posted by Xavier

]]> http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633371796000000000 Tue, 29 Jan 2008 05:00:00 GMT http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633371796000000000 Xavier Re: Building a Custom eBay Watch List Using the SOAP API System.NullReferenceException: Object reference not set to an instance of an object.

ItemType items = buyingResponse.WatchList.ItemArray;

i am having problem with this line..

please help!!

very urgent!!

thanks

posted by simster

]]> http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633372660000000000 Wed, 30 Jan 2008 05:00:00 GMT http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633372660000000000 simster Re: Building a Custom eBay Watch List Using the SOAP API The following line of code is giving me a hell of a time:

eBayAPIInterfaceService service = new eBayAPIInterfaceService();

Yields ->

The type or namespace name 'eBayAPIInterfaceService' could not be found (are you missing a using directive or an assembly reference?)

I can't find any resources to explain where/what the assembly is.

I

posted by Barry

]]> http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633381300000000000 Sat, 09 Feb 2008 05:00:00 GMT http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633381300000000000 Barry Re: Building a Custom eBay Watch List Using the SOAP API @Xavier: No clue why it does that, you may want to contact Alan who wrote the article.

@simster:  You're watchlist may be null which may imply you got zero search results from a quick glance.

posted by Clint

]]> http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633383892000000000 Tue, 12 Feb 2008 05:00:00 GMT http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633383892000000000 Clint Re: Building a Custom eBay Watch List Using the SOAP API @Barry:  Are you copying code or did you use the source we provided?  If you are just copying code, did you include the web service then at the top of the class include the using block to say You're using the ebay API?

posted by Clint

]]> http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633383892000000000 Tue, 12 Feb 2008 05:00:00 GMT http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633383892000000000 Clint Re: Building a Custom eBay Watch List Using the SOAP API @Barry:

This worked for me.

using ebayTest.com.ebay.developer;

ebayTest is my project name.  My web service name is com.ebay.developer too.

This is from a fresh project too.

posted by Clint

]]> http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633384756000000000 Wed, 13 Feb 2008 05:00:00 GMT http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633384756000000000 Clint Re: Building a Custom eBay Watch List Using the SOAP API @Coding4Fun

I am copying the C# code from the blocks above.

I add the Service Reference from http://developer.ebay.com/webservices/latest/eBaySvc.wsdl

And as far as namespaces, the only 3 I can find are:

using eBay.ServiceReference;

using eBay.Properties;

using eBay;

However I might be missing something, I can't find the eBayAPIInterfaceService object in the entire eBay namespace

I'm using VS 2008, .NET 3.5 if that would make a difference

posted by Barry

]]> http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633384756000000000 Wed, 13 Feb 2008 05:00:00 GMT http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633384756000000000 Barry Re: Building a Custom eBay Watch List Using the SOAP API I just tried the C# version from the download link above.

I am using VS 2008 Express.

I created a New Web site, imported the WSDL file as above.

Copied the source code from the download.

Inserted my AUTHID etc.

When compiling, I get one error on line 11

Line 11 is in Default.aspx.cs

using eBayWebServices;

Error 1 The type or namespace name 'eBayWebServices' could not be found (are you missing a using directive or an assembly reference?)

posted by Marty

]]> http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633402900000000000 Wed, 05 Mar 2008 05:00:00 GMT http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633402900000000000 Marty Re: Building a Custom eBay Watch List Using the SOAP API Hi

I left a question a few days ago and it has not shown up.

Any reason why?

posted by Marty

]]> http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633404628000000000 Fri, 07 Mar 2008 05:00:00 GMT http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633404628000000000 Marty Re: Building a Custom eBay Watch List Using the SOAP API @Marty:  Sorry, I was at Mix 08 and am only now catching up.  When you created your web service, what did you name it?  That is what your using block for that should be.  The author of this article renamed his from the default generated to "eBayWebService"

Do me a favor, type "using " then hit control-space.  I'll bet your'll see one of the items in the list be the item that you named your web service.

posted by Clint

]]> http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633405492000000000 Sat, 08 Mar 2008 05:00:00 GMT http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633405492000000000 Clint Re: Building a Custom eBay Watch List Using the SOAP API HI,

Figured you must have been away.

I am new to all this so be gentle with me.

When creating the Web service, is that when you are doing the

Add Web Reference?

Where do I type the using CRTL-space?

Marty

posted by Marty

]]> http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633406356000000000 Sun, 09 Mar 2008 05:00:00 GMT http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633406356000000000 Marty Re: Building a Custom eBay Watch List Using the SOAP API @Marty:  Email me by clicking the contact button up on the top and we'll take this offline from this thread.  I'll be able to respond quicker then I'll post a response on this thread on how we fixed the issue.

I'll be able to do a screen cast possibly to help out and talk you through it.

posted by Clint

]]> http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633407184000000000 Mon, 10 Mar 2008 04:00:00 GMT http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633407184000000000 Clint Re: Building a Custom eBay Watch List Using the SOAP API @Desperate Student TT:  Put in a break point, I bet your WatchList is null.

You'll need to do more defensive coding and verify the buyingResponse.WatchList != null before moving foward

posted by Clint

]]> http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633542832000000000 Thu, 14 Aug 2008 04:00:00 GMT http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633542832000000000 Clint Re: Building a Custom eBay Watch List Using the SOAP API I have this error!!

Object reference not set to an instance of an object.

Line 51:        ItemType[] items = buyingResponse.WatchList.ItemArray;

HELP PLS T.T

posted by Desperate Student TT

]]> http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633542832000000000 Thu, 14 Aug 2008 04:00:00 GMT http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633542832000000000 Desperate Student TT Re: Building a Custom eBay Watch List Using the SOAP API solved this problem

Line 51:        ItemType[] items = buyingResponse.WatchList.ItemArray

replace it with this code

 if (buyingResponse.WatchList != null)

       {

           items = buyingResponse.WatchList.ItemArray;

       }

and  if (items != null), put this 'if' loop to cover the entire 'add table raw' code

posted by Bun

]]> http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633554064000000000 Wed, 27 Aug 2008 04:00:00 GMT http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c633554064000000000 Bun Re: Building a Custom eBay Watch List Using the SOAP API @Hemanth one question is are you sure what you're querying has values getting returned?

Does the source code download work?

posted by Clint

]]> http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c634056912000000000 Thu, 01 Apr 2010 04:00:00 GMT http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c634056912000000000 Clint Re: Building a Custom eBay Watch List Using the SOAP API Getting null values in response then how could i get items, where i have given valid production appid, devid & certid with relative usertoken.

Please guide me

posted by Hemanth

]]> http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c634056912000000000 Thu, 01 Apr 2010 04:00:00 GMT http://channel9.msdn.com/coding4fun/articles/Building-a-Custom-eBay-Watch-List-Using-the-SOAP-API#c634056912000000000 Hemanth