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Symptom
XMLSerializer object Try serialization
When the NameValueCollection object, the following exception error message appears:
An Unhandled Exception of Type 'System.invalidOperationException' Occurred In System.xml.dll
Additional Information: You Must Implement The Add (System.String) Method on System.Collections.Specialized.NameValueCollection Because It inherits from iCault.
the reason
NameValueCollection is not directly realized
ICollection interface. in contrast,
NameValueCollection extension
NameObjectCollectionBase. This will be realized
Icollection interface, and
Replenishment in the NameValueCollection class
Add (system.string) method. In use
XMLSerializer
XMLSERIALIZER trial
NameValueCollection serialization or reverse sequence is general
Icollection. So it looks for default
Add (System.String). if there is not
ADD (System.String) method will exceed.
Alternative ways to resolve this issue, please use
The SOAPFormatter class is serialized instead of using XML for serialization.
Pay attention to use
SOAPFormatter class, you must add a reference to System.Runtime.Soap.dll.
Visual C # .NET code
The following code describes how to use in Visual C # .NET
SOAPFORMATTER:
Using system;
Using system.io;
USING SYSTEM.XML;
Using system.xml.serialization;
Using system.collections.specialized;
Using system.Runtime.Serialization.formatters.soap;
Namespace myconsoleApplication
{
Class class1
{
[Stathread]
Static void main (string [] args)
{
// defining a namevaluecollection Object
NameValueCollection namvalcoll = new namevalueCollection ();
// address Some Sample Data to NameValueCollection Object
Namvalcoll.Add ("Name1", "Value1");
// Serializing NameValueCollection Object By Using SoapFormatter
SOAPFORMATTER sf = new soapformatter ();
Stream strm1 = file.open (@ "c: /datasoap.xml", filemode.openorcreate, fileaccess.readwrite; sf.serialize (strM1, namvalcoll);
Strm1.close ();
// end of soap serialization
// deserializing the xml file into namevaluecollection Object
// by Using SoapFormatter
SOAPFORMATTER SF1 = New SOAPFORMATTER ();
Stream strM2 = file.open (@ "c: /datasoap.xml", filemode.open, fileaccess.read;
NameValueCollection Namvalcoll1 = (NameValueCollection) sf1.deserialize (STRM2);
Strm2.close ();
// end of soap deserialization
}
}
}
Visual Basic .NET code
The following code describes how to use in Visual Basic .NET
SOAPFORMATTER:
Imports system
Imports system.io
Imports System.xml.Serialization
Imports system.collections.specialized
Imports system.Runtime.Serialization.Formatters.soap
Module Module1
Sub main ()
'Defining a namevaluecollection Object
DIM NAMVALCOLL AS New NameValueCollection ()
'Adding Some Sample Data To NameValueCollection Object
Namvalcoll.Add ("Name1", "Value1")
'Serializing NameValueCollection Object by Using SOAPFORMATTER
DIM sf as soapformatter = new soapformatter ()
DIM STRM1 As Stream = file.open ("C: /Datasoapvb.xml", FileMode.Openorcreate, FileAccess.Readwrite
sf.serialize (strM1, namvalcoll)
Strm1.close ()
'End of SOAP SERIALIZATION
'DeSerializing the XML File Into NameValueCollection Object
'by Using SoapFormatter
DIM SF1 As SOAPFORMATTER = New soapFormatter ()
DIM STRM2 AS Stream = file.open ("C: /DataSoAppvb.xml", FileMode.Open, FileAccess.Read
DIM NAMVALCOLL1 AS NameValueCollection = sf1.deserialize (STRM2)
Strm2.close ()
'End of soap deserialization
End Sub
End module
This phenomenon is designed to make.
More information
Steps to reproduce the problem Start Microsoft Visual Studio .NET. On the File menu, point to "New" and click Project. Below "Project Types", click Visual C # items or "Visual Basic Project", and then click Console Application below "Template". Name the project MyConsoleApplication, then click OK. Replace existing code to: Visual C # .NET code Using system;
Using system.io;
Using system.xml.serialization;
Using system.collections.specialized;
Namespace myconsoleApplication
{
Class class1
{
[Stathread]
Static void main (string [] args)
{
// defining a namevalueCollection Object.
NameValueCollection namvalcoll = new namevalueCollection ();
// address Some Sample Data to NameValueCollection Object
Namvalcoll.Add ("Name1", "Value1");
// serializing the namevalueCollection Object Using XMLSerializer
XMLSerializer myserializer = new xmlserializer (TypeF (NameValueCollection);
Stream strm1 = file.open (@ "c: /datasoap.xml", filemode.openorcreate, fileaccess.readwrite;
MySerializer.Serialize (strM1, namvalcoll);
Strm1.close ();
}
}
}
Use Visual Basic .NET code IMPORTS SYSTEM
Imports system.io
Imports System.xml.Serialization
Imports system.collections.specialized
Module Module1
Sub main ()
'Defining a namevaluecollection object.
DIM Namvalcoll As New NameValueCollection
'Adding Some Sample Data To NameValueCollection Object
Namvalcoll.Add ("Name1", "Value1")
'Serializing The NameValueCollection Object Using XMLSerigIzer
DIM MySerializer As New XMLSerializer (gettype (NameValueCollection)
DIM STRM1 AS stream
Strm1 = file.open ("C: /DataSoap.xml", FileMode.Openorcreate, FileAccess.Readwrite)
MySerializer.Serialize (Strm1, Namvalcoll)
Strm1.close ()
End Sub
End module
On the Debug menu, click Start. At this point, the exception error message described in the "Symptom" section described herein will appear.
Refer to other information, click the article number below to see the article in the Microsoft Knowledge Base: 323503 Webcast: XML Serialization and Sample Code
314150 Info: Roadmap for XML Serialization in the .NET Framework
The information in this article applies to:
Microsoft Visual Basic .NET (2003) Microsoft Visual Basic .NET (2002) Microsoft Visual C # .NET (2003) Microsoft Visual C # .NET (2002) Microsoft XML Classes (included with the .NET Framework 1.0) Microsoft XML Classes (included with The .NET Framework 1.1)
Recent Updated: 2003-7-3 (1.4) Keyword Kberrmsg Kbxml KBSerial Kbcollections KbcollectionClass Kbprb KB814187 KBAUDDEVELOPER
