BUG: Strongly-typed DataTable GetSchemaSerializable method

  • Thread starter Thread starter Guest
  • Start date Start date
G

Guest

Hi,

I've created a strongly-typed DataSet that contains one DataTable. My
intent is to return this DataTable from a WebService that will be consumed by
a Windows Form. In my windows application, when I add a reference to the Web
Service, the proxy code that is generated in the Reference.vb file throws the
following errors:

"sub 'ReadXmlSerializable' cannot be declared 'Overrides' because it does
not override a sub in a base class."

AND

"Protected Overrides Function GetSchemaSerializable() As
System.Xml.Schema.XmlSchema' cannot override 'Protected Overridable Function
GetSchemaSerializable() As System.Xml.Schema.XmlSchema' because they differ
by their return types."

I can workaround this by removing the overrides directive from these
methods, but a warning is then generated saying they should be marked with
the overrides directive.

I was having this problem earlier today in the Designer.vb file associated
with the .xsd file of my DataSet before the WebService project was added to
the solution and got rid of it by deleting everything and starting with a
fresh solution and recreating my strongly-typed DataSet.

I'm a bit farther along in the solution this time, so starting over again is
not an option. In the meantime I can live with the warnings, but I have
about 20 or 30 more strongly-typed DataSets and DataTables to create, so a
fix for this would be great.

Thanks.
 
Hello,

Did you work with VS.NET 2003 or 2005? I create a test solution in VS.NEt
2005, but I didn't find the problem when there is following code in the
Reference.vb file:

<System.Diagnostics.DebuggerNonUserCodeAttribute()> _
Protected Overrides Sub ReadXmlSerializable(ByVal reader As
System.Xml.XmlReader)
If (Me.DetermineSchemaSerializationMode(reader) =
System.Data.SchemaSerializationMode.IncludeSchema) Then
Me.Reset
Dim ds As System.Data.DataSet = New System.Data.DataSet
ds.ReadXml(reader)
If (Not (ds.Tables("Table1")) Is Nothing) Then
MyBase.Tables.Add(New
Table1DataTable(ds.Tables("Table1")))
End If
Me.DataSetName = ds.DataSetName
Me.Prefix = ds.Prefix
Me.Namespace = ds.Namespace
Me.Locale = ds.Locale
Me.CaseSensitive = ds.CaseSensitive
Me.EnforceConstraints = ds.EnforceConstraints
Me.Merge(ds, false, System.Data.MissingSchemaAction.Add)
Me.InitVars
Else
Me.ReadXml(reader)
Me.InitVars
End If
End Sub

Luke Zhang
Microsoft Online Community Support

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Hi Luke,

I'm using VS 2005, and here are the two methods that are giving the error
message in the Reference.vb file that I have, let me know if you want me to
send you full source code:

<System.Diagnostics.DebuggerNonUserCodeAttribute()> _
Protected Overrides Sub ReadXmlSerializable(ByVal reader As
System.Xml.XmlReader)
If (Me.DetermineSchemaSerializationMode(reader) =
System.Data.SchemaSerializationMode.IncludeSchema) Then
Me.Reset()
Dim ds As System.Data.DataSet = New System.Data.DataSet
ds.ReadXml(reader)
If (Not (ds.Tables("CdInsurance")) Is Nothing) Then
MyBase.Tables.Add(New CdInsuranceDataTable(ds.Tables("CdInsurance")))
End If
Me.DataSetName = ds.DataSetName
Me.Prefix = ds.Prefix
Me.Namespace = ds.Namespace
Me.Locale = ds.Locale
Me.CaseSensitive = ds.CaseSensitive
Me.EnforceConstraints = ds.EnforceConstraints
Me.Merge(ds, False, System.Data.MissingSchemaAction.Add)
Me.InitVars()
Else
Me.ReadXml(reader)
Me.InitVars()
End If
End Sub

<System.Diagnostics.DebuggerNonUserCodeAttribute()> _
Protected Overrides Function GetSchemaSerializable() As
System.Xml.Schema.XmlSchema
Dim stream As System.IO.MemoryStream = New System.IO.MemoryStream
Me.WriteXmlSchema(New System.Xml.XmlTextWriter(stream, Nothing))
stream.Position = 0
Return System.Xml.Schema.XmlSchema.Read(New
System.Xml.XmlTextReader(stream), Nothing)
End Function
 
Thank you for the information. In your reference.vb, is the proxy class
definition like:

Partial Public Class Service
Inherits System.Web.Services.Protocols.SoapHttpClientProtocol

Also, in the referece list of current winform project, right click the
"system.web.services" and select properties, is its version "v2.0.50727"?
And its path is
"\WINDOWS\Microsoft.NET\Framework\v2.0.50727\System.Web.Services.dll"

Luke Zhang
Microsoft Online Community Support

==================================================
When responding to posts, please "Reply to Group" via your newsreader so
that others may learn and benefit from your issue.
==================================================

(This posting is provided "AS IS", with no warranties, and confers no
rights.)
 
Thanks. I may need to review your actual code to narrow down the problem.
Can you send me the web service project, if it wasn't too large. To get my
actual email, please remove the string "online".

Regards,

Luke Zhang
Microsoft Online Community Support

==================================================
When responding to posts, please "Reply to Group" via your newsreader so
that others may learn and benefit from your issue.
==================================================

(This posting is provided "AS IS", with no warranties, and confers no
rights.)
 
Hello Jason,

I sorry to say that I still didn't find the attachments files you sent to
my hotmail box.

Anyway, I sent you a sample which on my side don't have the problem. You
may set up it on your server to see if it can work . Also, if you keep the
web service and create a new winform project, add the web reference,
compile it, can you reproduce the problem?

Regards,

Luke


Luke Zhang
Microsoft Online Community Support

==================================================
When responding to posts, please "Reply to Group" via your newsreader so
that others may learn and benefit from your issue.
==================================================

(This posting is provided "AS IS", with no warranties, and confers no
rights.)
 
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