试试这样的代码：
using System;
using System.Collections.Generic;
using System.Collections;
using System.Linq;
using System.Text;
using System.Data;
using System.Xml;
using System.Xml.Serialization;
namespace ConsoleApplication1
{
class Program
{
const string FILENAME = @"c:\temp\test.xml";
static void Main(string[] args)
{
DataTable dt = new DataTable();
dt.Columns.Add("FederalTaxIdentifier", typeof(string));
dt.Columns.Add("ProviderName", typeof(string));
dt.Columns.Add("ContractualRelationshipCode", typeof(string));
dt.Columns.Add("SiteIdentifier", typeof(string));
dt.Columns.Add("SiteName", typeof(string));
dt.Columns.Add("LicenseTypeCode", typeof(string));
dt.Columns.Add("OpenDate", typeof(string));
dt.Columns.Add("CloseDate", typeof(string));
dt.Columns.Add("DirectorPrefixName", typeof(string));
dt.Columns.Add("DirectorFirstName", typeof(string));
dt.Columns.Add("DirectorMiddleInitial", typeof(string));
dt.Columns.Add("DirectorLastName", typeof(string));
dt.Columns.Add("DirectorPhoneNumber", typeof(string));
dt.Rows.Add(new object[] { "123", "alpha", "100", "1000", "abc", "code1","1/1/2000", "2/1/2000", "Mr.", "John", "L", "Smith", "800-555-1234"});
dt.Rows.Add(new object[] { "123", "alpha", "100", "1001", "abc", "code1", "1/1/2000", "2/1/2000", "Mrs.", "Mary", "L", "Smith", "800-555-1234" });
dt.Rows.Add(new object[] { "123", "alpha", "100", "1001", "abc", "code1", "1/1/2000", "2/1/2000", "Mr.", "Harry", "L", "Smith", "800-555-1234" });
dt.Rows.Add(new object[] { "456", "beta", "100", "2000", "abc", "code1", "1/1/2000", "2/1/2000", "Mr.", "John", "L", "Smith", "800-555-1234" });
dt.Rows.Add(new object[] { "456", "beta", "100", "2001", "abc", "code1", "1/1/2001", "2/1/2001", "Mr.", "Ralph", "L", "Smith", "800-555-1234" });
dt.Rows.Add(new object[] { "456", "beta", "100", "2002", "abc", "code1", "1/1/2000", "2/1/2000", "Mr.", "Brutus", "L", "Smith", "800-555-1234" });
dt.Rows.Add(new object[] { "789", "gama", "100", "3000", "abc", "code1", "1/1/2000", "2/1/2000", "Mrs.", "Ronda", "L", "Smith", "800-555-1234" });
dt.Rows.Add(new object[] { "789", "gama", "100", "3001", "abc", "code1", "2/1/2000", "3/1/2000", "Mr.", "George", "L", "Smith", "800-555-1234" });
dt.Rows.Add(new object[] { "789", "gama", "100", "3002", "abc", "code1", "3/1/2000", "4/1/2000", "Mrs.", "Linda", "L", "Smith", "800-555-1234" });
dt.Rows.Add(new object[] { "789", "gama", "100", "3003", "abc", "code1", "4/1/2000", "5/1/2000", "Mrs.", "Sally", "L", "Smith", "800-555-1234" });
var dict =
dt.AsEnumerable()
.GroupBy(x => x.Field<string>("FederalTaxIdentifier"), y => y)
.ToDictionary(x => x.Key, y => y
.GroupBy(a => a.Field<string>("SiteIdentifier"), b => b)
.ToDictionary( a => a.Key, b => b.FirstOrDefault()));
Providers providers = new Providers();
providers.Provider = dict.Select(provider => new ProvidersProvider()
{
FederalTaxIdentifier = provider.Key,
ProviderName = provider.Value.FirstOrDefault().Value.Field<string>("ProviderName"),
ContractualRelationshipCode = provider.Value.FirstOrDefault().Value.Field<string>("ContractualRelationshipCode"),
ProviderSites = provider.Value.Select(site => new ProvidersProviderProviderSite()
{
SiteIdentifier = site.Key,
SiteName = site.Value.Field<string>("SiteName"),
LicenseTypeCode = site.Value.Field<string>("LicenseTypeCode"),
OpenDate = site.Value.Field<string>("OpenDate"),
CloseDate = site.Value.Field<string>("CloseDate"),
DirectorPrefixName = site.Value.Field<string>("DirectorPrefixName"),
DirectorFirstName = site.Value.Field<string>("DirectorFirstName"),
DirectorMiddleInitial = site.Value.Field<string>("DirectorMiddleInitial"),
DirectorLastName = site.Value.Field<string>("DirectorLastName"),
DirectorPhoneNumber = site.Value.Field<string>("DirectorPhoneNumber")
}).ToArray()
}).ToArray();
XmlWriterSettings settings = new XmlWriterSettings();
settings.Indent = true;
XmlWriter writer = XmlWriter.Create(FILENAME, settings);
XmlSerializer serializer = new XmlSerializer(typeof(Providers));
serializer.Serialize(writer,providers);
}
}
//------------------------------------------------------------------------------
// <auto-generated>
// This code was generated by a tool.
// Runtime Version:2.0.50727.6421
//
// Changes to this file may cause incorrect behavior and will be lost if
// the code is regenerated.
// </auto-generated>
//------------------------------------------------------------------------------
//
// This source code was auto-generated by xsd, Version=2.0.50727.3038.
//
/// <remarks/>
[System.CodeDom.Compiler.GeneratedCodeAttribute("xsd", "2.0.50727.3038")]
[System.SerializableAttribute()]
[System.Diagnostics.DebuggerStepThroughAttribute()]
[System.ComponentModel.DesignerCategoryAttribute("code")]
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType=true)]
[System.Xml.Serialization.XmlRootAttribute(Namespace="", IsNullable=false)]
public partial class Providers {
private ProvidersProvider[] providerField;
/// <remarks/>
[System.Xml.Serialization.XmlElementAttribute("Provider", Form=System.Xml.Schema.XmlSchemaForm.Unqualified)]
public ProvidersProvider[] Provider {
get {
return this.providerField;
}
set {
this.providerField = value;
}
}
}
/// <remarks/>
[System.CodeDom.Compiler.GeneratedCodeAttribute("xsd", "2.0.50727.3038")]
[System.SerializableAttribute()]
[System.Diagnostics.DebuggerStepThroughAttribute()]
[System.ComponentModel.DesignerCategoryAttribute("code")]
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType=true)]
public partial class ProvidersProvider {
private string federalTaxIdentifierField;
private string providerNameField;
private string contractualRelationshipCodeField;
private ProvidersProviderProviderSite[] providerSitesField;
/// <remarks/>
[System.Xml.Serialization.XmlElementAttribute(Form=System.Xml.Schema.XmlSchemaForm.Unqualified)]
public string FederalTaxIdentifier {
get {
return this.federalTaxIdentifierField;
}
set {
this.federalTaxIdentifierField = value;
}
}
/// <remarks/>
[System.Xml.Serialization.XmlElementAttribute(Form=System.Xml.Schema.XmlSchemaForm.Unqualified)]
public string ProviderName {
get {
return this.providerNameField;
}
set {
this.providerNameField = value;
}
}
/// <remarks/>
[System.Xml.Serialization.XmlElementAttribute(Form=System.Xml.Schema.XmlSchemaForm.Unqualified)]
public string ContractualRelationshipCode {
get {
return this.contractualRelationshipCodeField;
}
set {
this.contractualRelationshipCodeField = value;
}
}
/// <remarks/>
[System.Xml.Serialization.XmlArrayAttribute(Form=System.Xml.Schema.XmlSchemaForm.Unqualified)]
[System.Xml.Serialization.XmlArrayItemAttribute("ProviderSite", Form=System.Xml.Schema.XmlSchemaForm.Unqualified, IsNullable=false)]
public ProvidersProviderProviderSite[] ProviderSites {
get {
return this.providerSitesField;
}
set {
this.providerSitesField = value;
}
}
}
/// <remarks/>
[System.CodeDom.Compiler.GeneratedCodeAttribute("xsd", "2.0.50727.3038")]
[System.SerializableAttribute()]
[System.Diagnostics.DebuggerStepThroughAttribute()]
[System.ComponentModel.DesignerCategoryAttribute("code")]
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType=true)]
public partial class ProvidersProviderProviderSite {
private string siteIdentifierField;
private string siteNameField;
private string licenseTypeCodeField;
private string openDateField;
private string closeDateField;
private string directorPrefixNameField;
private string directorFirstNameField;
private string directorMiddleInitialField;
private string directorLastNameField;
private string directorPhoneNumberField;
private string nationalProviderIdentifierField;
private string webAddressField;
/// <remarks/>
[System.Xml.Serialization.XmlElementAttribute(Form=System.Xml.Schema.XmlSchemaForm.Unqualified)]
public string SiteIdentifier {
get {
return this.siteIdentifierField;
}
set {
this.siteIdentifierField = value;
}
}
/// <remarks/>
[System.Xml.Serialization.XmlElementAttribute(Form=System.Xml.Schema.XmlSchemaForm.Unqualified)]
public string SiteName {
get {
return this.siteNameField;
}
set {
this.siteNameField = value;
}
}
/// <remarks/>
[System.Xml.Serialization.XmlElementAttribute(Form=System.Xml.Schema.XmlSchemaForm.Unqualified)]
public string LicenseTypeCode {
get {
return this.licenseTypeCodeField;
}
set {
this.licenseTypeCodeField = value;
}
}
/// <remarks/>
[System.Xml.Serialization.XmlElementAttribute(Form=System.Xml.Schema.XmlSchemaForm.Unqualified)]
public string OpenDate {
get {
return this.openDateField;
}
set {
this.openDateField = value;
}
}
/// <remarks/>
[System.Xml.Serialization.XmlElementAttribute(Form=System.Xml.Schema.XmlSchemaForm.Unqualified)]
public string CloseDate {
get {
return this.closeDateField;
}
set {
this.closeDateField = value;
}
}
/// <remarks/>
[System.Xml.Serialization.XmlElementAttribute(Form=System.Xml.Schema.XmlSchemaForm.Unqualified)]
public string DirectorPrefixName {
get {
return this.directorPrefixNameField;
}
set {
this.directorPrefixNameField = value;
}
}
/// <remarks/>
[System.Xml.Serialization.XmlElementAttribute(Form=System.Xml.Schema.XmlSchemaForm.Unqualified)]
public string DirectorFirstName {
get {
return this.directorFirstNameField;
}
set {
this.directorFirstNameField = value;
}
}
/// <remarks/>
[System.Xml.Serialization.XmlElementAttribute(Form=System.Xml.Schema.XmlSchemaForm.Unqualified)]
public string DirectorMiddleInitial {
get {
return this.directorMiddleInitialField;
}
set {
this.directorMiddleInitialField = value;
}
}
/// <remarks/>
[System.Xml.Serialization.XmlElementAttribute(Form=System.Xml.Schema.XmlSchemaForm.Unqualified)]
public string DirectorLastName {
get {
return this.directorLastNameField;
}
set {
this.directorLastNameField = value;
}
}
/// <remarks/>
[System.Xml.Serialization.XmlElementAttribute(Form=System.Xml.Schema.XmlSchemaForm.Unqualified)]
public string DirectorPhoneNumber {
get {
return this.directorPhoneNumberField;
}
set {
this.directorPhoneNumberField = value;
}
}
/// <remarks/>
[System.Xml.Serialization.XmlElementAttribute(Form=System.Xml.Schema.XmlSchemaForm.Unqualified)]
public string NationalProviderIdentifier {
get {
return this.nationalProviderIdentifierField;
}
set {
this.nationalProviderIdentifierField = value;
}
}
/// <remarks/>
[System.Xml.Serialization.XmlElementAttribute(Form=System.Xml.Schema.XmlSchemaForm.Unqualified)]
public string WebAddress {
get {
return this.webAddressField;
}
set {
this.webAddressField = value;
}
}
}
}
我用了以下xsd
<?xml version="1.0" encoding="utf-8" ?>
<schema xmlns="http://www.w3.org/2001/XMLSchema" xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="Providers">
<xs:complexType>
<xs:sequence>
<xs:element maxOccurs="unbounded" name="Provider">
<xs:complexType>
<xs:all>
<xs:element minOccurs="0" name="FederalTaxIdentifier" type="xs:string" />
<xs:element minOccurs="0" name="ProviderName" type="xs:string" />
<xs:element minOccurs="0" name="ContractualRelationshipCode" type="xs:string" />
<xs:element minOccurs="0" name="ProviderSites">
<xs:complexType>
<xs:sequence>
<xs:element maxOccurs="unbounded" name="ProviderSite">
<xs:complexType>
<xs:all>
<xs:element minOccurs="0" name="SiteIdentifier" type="xs:string" />
<xs:element minOccurs="0" name="SiteName" type="xs:string" />
<xs:element minOccurs="0" name="LicenseTypeCode" type="xs:string" />
<xs:element minOccurs="0" name="OpenDate" type="xs:string" />
<xs:element minOccurs="0" name="CloseDate" type="xs:string" />
<xs:element minOccurs="0" name="DirectorPrefixName" type="xs:string" />
<xs:element minOccurs="0" name="DirectorFirstName" type="xs:string" />
<xs:element minOccurs="0" name="DirectorMiddleInitial" type="xs:string" />
<xs:element minOccurs="0" name="DirectorLastName" type="xs:string" />
<xs:element minOccurs="0" name="DirectorPhoneNumber" type="xs:string" />
<xs:element minOccurs="0" name="NationalProviderIdentifier" type="xs:string" />
<xs:element minOccurs="0" name="WebAddress" type="xs:string" />
</xs:all>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:all>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
</schema>