Read WebService List<> data

  • Thread starter Thread starter Peter
  • Start date Start date
P

Peter

I have a WebService which returns a List of RunningReport class
How do I read this XML data on the client side. How do I convert
List<RunningReport> from the WebService side to List<RunningReport> on the
client side

I have tried the following:

List<RunningReport> reportList = null;

localhost.ReportService localrs = new localhost.ReportService();
localrs.Url = GetServiceURL();
reportList = localrs.RunningReports();


but I am getting the following error

Error 67 Cannot implicitly convert type 'localhost.RunningReport[]' to
'System.Collections.Generic.List<Reports.Modules.RunningJobs.RunningReport>


Thank You

Peter


//////////////// Heres' the XML data from the WebService
///////////////////////////////////

<?xml version="1.0" encoding="utf-8" ?>
ArrayOfRunningReport xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xmlns="http://wsinc.com/webservices/">
<RunningReport>
<ReportID>0</ReportID>
<CreatedBy>12</CreatedBy>
<ItemId>1</ItemId>
<OutputType>PDF</OutputType>
</RunningReport>
<RunningReport>
<ReportID>0</ReportID>
<CreatedBy>12</CreatedBy>
<ItemId>2</ItemId>
<OutputType>PDF</OutputType>
</RunningReport>
</ArrayOfRunningReport>


///////////////////////////////////// Here's the class that the Webservice
is returning: ////////////////////////////////////////////

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ReportInfoLib
{
[Serializable]
public class RunningReport
{
private string _reportName;
private int _reportID;
private int _createdBy;
private string _discription;
private int _itemId;
private DocumentTypeEnum _outputType;
private string _printerName;
private string _trayName;
private string _emailList;
private List<ParameterNameValue> _pnv;

public string ReportName
{
get { return this._reportName; }
set { this._reportName = value; }
}

public int ReportID
{
get { return this._reportID; }
set { this._reportID = value; }
}

public int CreatedBy
{
get { return this._createdBy; }
set { this._createdBy = value; }
}

public string Discription
{
get { return this._discription; }
set { this._discription = value; }
}

public int ItemId
{
get { return this._itemId; }
set { this._itemId = value; }
}

public ReportInfoLib.DocumentTypeEnum OutputType
{
get { return this._outputType; }
set { this._outputType = value; }
}

public string PrinterName
{
get { return this._printerName; }
set { this._printerName = value; }
}

public string TrayName
{
get { return this._trayName; }
set { this._trayName = value; }
}

public string EmailList
{
get { return this._emailList; }
set { this._emailList = value; }
}

public
System.Collections.Generic.List<ReportInfoLib.ParameterNameValue> Pnv
{
get { return this._pnv; }
set { this._pnv = value; }
}
}
}
 
Peter said:
I have a WebService which returns a List of RunningReport class
How do I read this XML data on the client side. How do I convert
List<RunningReport> from the WebService side to List<RunningReport> on the
client side
Click to expand...

Sorry, it doesn't work this way.

The client has no idea what type the server is using. Remember that the
client could be running Java, in which case, it certainly doesn't know
anything about List<RunningReport>.

What the client _does_ know about is the XML Schema that it gets from the
WSDL file that it gets from the server when you use Add Web Reference. That
schema will have a section similar to this:

<xs:element name="ArrayOfRunningReport">
<xs:complexType>
<xs:sequence>
<xs:element minOccurs="0" maxOccurs="unbounded" type="RunningReport"/>
</xs:sequence>
</xs:complexType>
</xs:element>

Notice the total lack of mention of List<T>.

Using ASMX web services (which you seem to be doing), that will always
translate into RunningReport[] on the client. If you were using WCF, you'd
be able to tell it to use List<T> instead. Since you're using the old stuff,
you'll have to fake it:

List<RunningReport> reportList ; //= null; Don't do this. The
default is null, besides, it gets overwritten

localhost.ReportService localrs = new localhost.ReportService();
localrs.Url = GetServiceURL();
RunningReports[] reportsArray = localrs.RunningReports();
reportList = new List<RunningReports>(reportsArray);
 
John Saunders said:
Peter said:
I have a WebService which returns a List of RunningReport class
How do I read this XML data on the client side. How do I convert
List<RunningReport> from the WebService side to List<RunningReport> on
the client side
Click to expand...

Sorry, it doesn't work this way.

The client has no idea what type the server is using. Remember that the
client could be running Java, in which case, it certainly doesn't know
anything about List<RunningReport>.

What the client _does_ know about is the XML Schema that it gets from the
WSDL file that it gets from the server when you use Add Web Reference.
That schema will have a section similar to this:

<xs:element name="ArrayOfRunningReport">
<xs:complexType>
<xs:sequence>
<xs:element minOccurs="0" maxOccurs="unbounded" type="RunningReport"/>
</xs:sequence>
</xs:complexType>
</xs:element>

Notice the total lack of mention of List<T>.

Using ASMX web services (which you seem to be doing), that will always
translate into RunningReport[] on the client. If you were using WCF, you'd
be able to tell it to use List<T> instead. Since you're using the old
stuff, you'll have to fake it:

List<RunningReport> reportList ; //= null; Don't do this. The
default is null, besides, it gets overwritten

localhost.ReportService localrs = new localhost.ReportService();
localrs.Url = GetServiceURL();
RunningReports[] reportsArray = localrs.RunningReports();
reportList = new List<RunningReports>(reportsArray);
Click to expand...

Thank You for your help!

This the following line does not work:
RunningReports[] reportsArray = localrs.RunningReports();

Cannot implicitly convert type 'localhost.RunningReport[]' to
'Reports.Modules.RunningJobs.RunningReport[]'
 
Hi Peter,

The problem you encountered, is caused by XML webservice does not expose
implement details to client(only expose WSDL service description) for
interop purpose. Therefore, for any custom types used in webservice, by
default the client-side will generate a light weight delegate class to
represent it. That's why, for your scenario, it reports the following error:

================
Cannot implicitly convert type 'localhost.RunningReport[]' to
'Reports.Modules.RunningJobs.RunningReport[]'
===============

here the "localhost.RunningReport" type is generated by the webservice
client proxy(add webreference), while
"Reports.Modules.RunningJobs.RunningReport" is your own type(the type used
at server-side).

Currently one way to overcome this problem is manually modify the
auto-generated webservice proxy's source code. You can change the return
type from the "localhost.RunningReport[]" to
"Reports.Modules.RunningJobs.RunningReport[]". The drawback of this is
when you update the webservice refefence, your change will be overwritten.
To avoid this, you can add a partial class file for the webservice clienet
proxy class, and add a new method (the same signature and attributes as the
original webmethod), and chang the return type to the one you want.

Hope this helps.

Sincerely,

Steven Cheng

Microsoft MSDN Online Support Lead


Delighting our customers is our #1 priority. We welcome your comments and
suggestions about how we can improve the support we provide to you. Please
feel free to let my manager know what you think of the level of service
provided. You can send feedback directly to my manager at:
(e-mail address removed).

==================================================
Get notification to my posts through email? Please refer to
http://msdn.microsoft.com/en-us/subscriptions/aa948868.aspx#notifications.
==================================================
This posting is provided "AS IS" with no warranties, and confers no rights.
--------------------
From: "Peter" <[email protected]>
References: <[email protected]>
Click to expand...
Subject: Re: Read WebService List<> data
Date: Thu, 9 Oct 2008 21:19:42 -0500
Click to expand...
John Saunders said:
Peter said:
I have a WebService which returns a List of RunningReport class
How do I read this XML data on the client side. How do I convert
List<RunningReport> from the WebService side to List<RunningReport> on
the client side
Click to expand...

Sorry, it doesn't work this way.

The client has no idea what type the server is using. Remember that the
client could be running Java, in which case, it certainly doesn't know
anything about List<RunningReport>.

What the client _does_ know about is the XML Schema that it gets from the
WSDL file that it gets from the server when you use Add Web Reference.
That schema will have a section similar to this:

<xs:element name="ArrayOfRunningReport">
<xs:complexType>
<xs:sequence>
<xs:element minOccurs="0" maxOccurs="unbounded" type="RunningReport"/>
</xs:sequence>
</xs:complexType>
</xs:element>

Notice the total lack of mention of List<T>.

Using ASMX web services (which you seem to be doing), that will always
translate into RunningReport[] on the client. If you were using WCF, you'd
be able to tell it to use List<T> instead. Since you're using the old
stuff, you'll have to fake it:

List<RunningReport> reportList ; //= null; Don't do this. The
default is null, besides, it gets overwritten

localhost.ReportService localrs = new localhost.ReportService();
localrs.Url = GetServiceURL();
RunningReports[] reportsArray = localrs.RunningReports();
reportList = new List<RunningReports>(reportsArray);
Click to expand...

Thank You for your help!

This the following line does not work:
RunningReports[] reportsArray = localrs.RunningReports();

Cannot implicitly convert type 'localhost.RunningReport[]' to
'Reports.Modules.RunningJobs.RunningReport[]'
Click to expand...
 
"Steven Cheng" said:
Hi Peter,

The problem you encountered, is caused by XML webservice does not expose
implement details to client(only expose WSDL service description) for
interop purpose. Therefore, for any custom types used in webservice, by
default the client-side will generate a light weight delegate class to
represent it. That's why, for your scenario, it reports the following
error:

================
Cannot implicitly convert type 'localhost.RunningReport[]' to
'Reports.Modules.RunningJobs.RunningReport[]'
===============

here the "localhost.RunningReport" type is generated by the webservice
client proxy(add webreference), while
"Reports.Modules.RunningJobs.RunningReport" is your own type(the type used
at server-side).

Currently one way to overcome this problem is manually modify the
auto-generated webservice proxy's source code. You can change the return
type from the "localhost.RunningReport[]" to
"Reports.Modules.RunningJobs.RunningReport[]". The drawback of this is
when you update the webservice refefence, your change will be overwritten.
To avoid this, you can add a partial class file for the webservice clienet
proxy class, and add a new method (the same signature and attributes as
the
original webmethod), and chang the return type to the one you want.
Click to expand...

As Steven has said, this will not work, as it will be overwritten every time
you update your web reference.

The correct solution is simply to use:

localhost.RunningReports[] reportsArray = localrs.RunningReports();
 
John Saunders said:
"Steven Cheng" said:
Hi Peter,

The problem you encountered, is caused by XML webservice does not expose
implement details to client(only expose WSDL service description) for
interop purpose. Therefore, for any custom types used in webservice, by
default the client-side will generate a light weight delegate class to
represent it. That's why, for your scenario, it reports the following
error:

================
Cannot implicitly convert type 'localhost.RunningReport[]' to
'Reports.Modules.RunningJobs.RunningReport[]'
===============

here the "localhost.RunningReport" type is generated by the webservice
client proxy(add webreference), while
"Reports.Modules.RunningJobs.RunningReport" is your own type(the type
used
at server-side).

Currently one way to overcome this problem is manually modify the
auto-generated webservice proxy's source code. You can change the return
type from the "localhost.RunningReport[]" to
"Reports.Modules.RunningJobs.RunningReport[]". The drawback of this is
when you update the webservice refefence, your change will be
overwritten.
To avoid this, you can add a partial class file for the webservice
clienet
proxy class, and add a new method (the same signature and attributes as
the
original webmethod), and chang the return type to the one you want.
Click to expand...

As Steven has said, this will not work, as it will be overwritten every
time you update your web reference.

The correct solution is simply to use:

localhost.RunningReports[] reportsArray = localrs.RunningReports();
Click to expand...

Thank You for your help, that worked!

I also switched to WCF, which works very nice.
 
Hi Peter,

I'm glad that you've got it working. If there is anything else need help
later, welcome to post here.

Sincerely,

Steven Cheng

Microsoft MSDN Online Support Lead


Delighting our customers is our #1 priority. We welcome your comments and
suggestions about how we can improve the support we provide to you. Please
feel free to let my manager know what you think of the level of service
provided. You can send feedback directly to my manager at:
(e-mail address removed).


--------------------
From: "Peter" <[email protected]>
References: <[email protected]>
Click to expand...
<[email protected]>
<[email protected]>
Subject: Re: Read WebService List<> data
Date: Fri, 10 Oct 2008 16:17:19 -0500
Click to expand...
John Saunders said:
"Steven Cheng" said:
Hi Peter,

The problem you encountered, is caused by XML webservice does not expose
implement details to client(only expose WSDL service description) for
interop purpose. Therefore, for any custom types used in webservice, by
default the client-side will generate a light weight delegate class to
represent it. That's why, for your scenario, it reports the following
error:

================
Cannot implicitly convert type 'localhost.RunningReport[]' to
'Reports.Modules.RunningJobs.RunningReport[]'
===============

here the "localhost.RunningReport" type is generated by the webservice
client proxy(add webreference), while
"Reports.Modules.RunningJobs.RunningReport" is your own type(the type
used
at server-side).

Currently one way to overcome this problem is manually modify the
auto-generated webservice proxy's source code. You can change the return
type from the "localhost.RunningReport[]" to
"Reports.Modules.RunningJobs.RunningReport[]". The drawback of this is
when you update the webservice refefence, your change will be
overwritten.
To avoid this, you can add a partial class file for the webservice
clienet
proxy class, and add a new method (the same signature and attributes as
the
original webmethod), and chang the return type to the one you want.
Click to expand...

As Steven has said, this will not work, as it will be overwritten every
time you update your web reference.

The correct solution is simply to use:

localhost.RunningReports[] reportsArray = localrs.RunningReports();
Click to expand...

Thank You for your help, that worked!

I also switched to WCF, which works very nice.
Click to expand...
 
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