VB.NET Web Service / Web Form Errors

dhall4biz

I am having problems getting my web form (aspx file) reading a web service when published to my hosted web site (www.inflectionpoint.net). I can execute the web service (TestService.asmx) from both my local development environment (VS.NET 2004) and the hosted site. It generates the list of methods to select from and generates the resulting XML data (pulled from a remote database) when selecting a specific method. However, when I try to consume the XML data via a web form, I can only access the web form (TestServiceWebform.aspx) successfully from my _local_ development machine. When I publish the web form to the host site, I get various errors. **(See Error message below:)** Server Error in '/webservices/TestServiceWebApp' Application. -------------------------------------------------------------------------------- The request failed with HTTP status 404: Not Found. 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.Net.WebException: The request failed with HTTP status 404: Not Found. Source Error: An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below. Stack Trace: [WebException: The request failed with HTTP status 404: Not Found.] System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall) +1294 System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters) +218 TestServiceWebApp.TestService.MyTestService.GetIssuesData() in c:\inetpub\wwwroot\TestServiceWebApp\Web References\TestService\Reference.vb:42 TestServiceWebApp.GetTestServiceData.Page_Load(Object sender, EventArgs e) in c:\inetpub\wwwroot\TestServiceWebApp\TestServiceWebform.aspx.vb:40 System.Web.UI.Control.OnLoad(EventArgs e) +67 System.Web.UI.Control.LoadRecursive() +35 System.Web.UI.Page.ProcessRequestMain() +742 -------------------------------------------------------------------------------- Version Information: Microsoft .NET Framework Version:1.1.4322.573; ASP.NET Version:1.1.4322.947 **(End of Error message)** I suspect some of the issues are the folder/directory differences between my development and hosted environment (my local environment is "c:/localhost/TestServiceWebApp/" and my hosted environment is "http://inflectionpoint.net/webservices/TestServiceWebApp/", but that doesn't seem affect the XML web service application!) and/or how I am publishing the web form using FTP utility. XML Web service directory and file configuration: ../webservices/TestService/web.config ../webservices/TestService/TestService.asmx (and the rest of the VS project files) ../webservices/TestService/bin/TestService.dll ../webservices/TestService/bin/TestService.pdb Web Form/consumer directory and file configuration: ../webservices/TestServiceWebApp/web.config ../webservices/TestServiceWebApp/TestServiceWebform.aspx (and other VS project files) ../webservices/TestServiceWebApp/bin/TestServiceWebform.dll ../webservices/TestServiceWebApp/bin/TestServiceWebform.pdb I have moved the project files and web.config files all over the structure, with no success in getting the aspx file to work. The hosting service (CWI-Hosting) has confirmed they set up both application forlders as IIS Applications. I have searched all over for resolution to this type of issue. I suspect it may involve changing the Reference.Map or other configuration filesand/or their location in the folder structure. Many thanks.

2 Replies

Know the answer? Post it — somebody with the same question will find it here.

dhall4biz22y ago
I found the problem! My troubleshooting process: Since enabling Trace, the results mentioned "Reference.vb" file (line 42) and the "TestServicewebform.aspx.vb" file (line 40), that seemed like a good place to start. 1) I decided to look at the "Reference.vb" file first, since that error may have led to any/all subsequent errors generated. I looked the command (a method call) on line 42 which was: Dim results() As Object= Me.Invoke("GetIssuesData", New Object(-1) {}) The page seemed to have trouble finding the method to execute or the syntax may have been incorrectly set. a) The syntax, method names, and object information looked reasonable when compared to the structure defined in VS .NET (good, since this was pretty much out of my control since VS builds the code in the file!), so I figured the method was not being found. b) The function didn't use any path statements, so I looked in the lines _above_ line 42. All of the pathing statements ("RequestNameSpace:=", "ResponseNameSpace:=", etc.) seemed to refer to my website _name_ ("http://www.inflectionpoint.net/"..). 2) I looked in the Web Service's [Web Reference URL] property and noticed I had my site's _IP address_ entered instead of the site name. Hmmm... 3) I renamed my current web service reference (adding '_old' to the name) to preserve my existing settings (I'm paranoid about losing any/all work!). 4) I opened the 'Add Web Reference' wizard and mapped to my 'localhost' web service (my remote site's web service is not registered with UDDI yet). After it was recognized, I changed it to my remote site's URL (replacing 'localhost' with "www.inflectionpoint.net") and tested the connection (successfully). 5) I rebuilt the Solution and application and published via FTP. 6) After stopping an restarting the web site (I don't know if this is required or not, I just thought I'd do it to be thorough), I opened the URL to the aspx page and it pulled the data without errors! 7) I then disabled tracing in the web.config file. The sky is much bluer now (yes, even in December in Seattle) and the air seems much cleaner. Hope this helps others out there experiencing similar issues.
dhall4biz22y ago
Additional information - Using the Trace feature, I captured the following information in the 'Trace Information' section: * * * * * * Category: "Unhandled Execution Error" Information: The request failed with HTTP status 404: Not Found. at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall) at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters) at TestServiceWebApp.TestService.MyTestService.GetIssuesData() in c:\inetpub\wwwroot\TestServiceWebApp\Web References\TestService\Reference.vb:line 42 at TestServiceWebApp.GetTestServiceData.Page_Load(Object sender, EventArgs e) in c:\inetpub\wwwroot\TestServiceWebApp\TestServiceWebform.aspx.vb:line 40 at System.Web.UI.Control.OnLoad(EventArgs e) at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Page.ProcessRequestMain() * * * * * Line 41-44 in the "Reference.vb" file has: Public Function GetIssuesData() As System.Data.DataSet Dim results() As Object = Me.Invoke("GetIssuesData", New Object(-1) {}) Return CType(results(0),System.Data.DataSet) End Function Line 38-41 in the "TestServiceWebform.aspx.vb" file has: Dim ws As New TestService.MyTestService 'MyTestService is the 'TestService' WebService Method ctlIssuesDataGrid.DataSource = ws.GetIssuesData ctlIssuesDataGrid.DataBind() This would seem to be a pathing issue - the Web Service's method can not be found where .NET expects it to be. Just a hunch. Again, help is appreciated.