XmlDataDocument 构造函数

定义

命名空间:

System.Xml

程序集:

System.Data.Common.dll

程序集:

System.Data.dll

初始化 XmlDataDocument 类的新实例。

重载

XmlDataDocument()	初始化 XmlDataDocument 类的新实例。
XmlDataDocument(DataSet)	使用指定的 XmlDataDocument 初始化 DataSet 类的新实例。

XmlDataDocument()

初始化 XmlDataDocument 类的新实例。

public:
 XmlDataDocument();

public XmlDataDocument ();

Public Sub New ()

注解

创建一个空 DataSet 并与之 XmlDataDocument关联的 。

XmlDataDocument(DataSet)

使用指定的 XmlDataDocument 初始化 DataSet 类的新实例。

public:
 XmlDataDocument(System::Data::DataSet ^ dataset);

public XmlDataDocument (System.Data.DataSet dataset);

new System.Xml.XmlDataDocument : System.Data.DataSet -> System.Xml.XmlDataDocument

Public Sub New (dataset As DataSet)

参数

dataset

DataSet

要加载到 DataSet 的 XmlDataDocument。

示例

以下示例将客户表加载到一个 XmlDataDocument。

此示例使用 SQL Server 2000 Northwind 数据库。

#using <System.Xml.dll>
#using <System.Transactions.dll>
#using <System.EnterpriseServices.dll>
#using <System.dll>
#using <System.Data.dll>

using namespace System;
using namespace System::Data;
using namespace System::Xml;
using namespace System::Data::SqlClient;
int main()
{
   DataSet^ dsNorthwind = gcnew DataSet;
   
   //Create the connection string.           
   String^ sConnect;
   sConnect = "Data Source=localhost;Integrated Security=SSPI;Initial Catalog=Northwind";
   
   //Create a connection object to connect to the northwind db.
   SqlConnection^ nwconnect = gcnew SqlConnection( sConnect );
   
   //Create a command string to select all the customers in the WA region.
   String^ sCommand = "Select * from Customers where Region='WA'";
   
   //Create an adapter to load the DataSet.
   SqlDataAdapter^ myDataAdapter = gcnew SqlDataAdapter( sCommand,nwconnect );
   
   //Fill the DataSet with the selected records.
   myDataAdapter->Fill( dsNorthwind, "Customers" );
   
   //Load the document with the DataSet.
   XmlDataDocument^ doc = gcnew XmlDataDocument( dsNorthwind );
   
   //Display the XmlDataDocument.
   doc->Save( Console::Out );
}

using System;
using System.Data;
using System.Xml;
using System.Data.SqlClient;

public class Sample
{
  public static void Main()
  {
     DataSet dsNorthwind = new DataSet();

     //Create the connection string.
     String sConnect;
     sConnect="Data Source=localhost;Integrated Security=SSPI;Initial Catalog=Northwind";

     //Create a connection object to connect to the northwind db.
     SqlConnection nwconnect = new SqlConnection(sConnect);

     //Create a command string to select all the customers in the WA region.
     String sCommand = "Select * from Customers where Region='WA'";

     //Create an adapter to load the DataSet.
     SqlDataAdapter myDataAdapter = new SqlDataAdapter(sCommand, nwconnect);

     //Fill the DataSet with the selected records.
     myDataAdapter.Fill(dsNorthwind,"Customers");

     //Load the document with the DataSet.
     XmlDataDocument doc = new XmlDataDocument(dsNorthwind);

     //Display the XmlDataDocument.
     doc.Save(Console.Out);
  }
}

Imports System.Xml
Imports System.Data
Imports System.Data.SqlClient

public class Sample
 
  public shared sub Main()
   
    Dim dsNorthwind as DataSet = new DataSet()
 
    'Create the connection string.
    Dim sConnect as String           
    sConnect="Data Source=localhost;Integrated Security=SSPI;Initial Catalog=Northwind"     
          
    'Create a connection object to connect to the northwind db.
    Dim nwconnect as SqlConnection
    nwconnect = new SqlConnection(sConnect)
 
    'Create a command string to select all the customers in the WA region.
    Dim sCommand as String = "Select * from Customers where Region='WA'"
 
    'Create an Adapter to load the DataSet.
    Dim myDataAdapter as SqlDataAdapter
    myDataAdapter = new SqlDataAdapter(sCommand, nwconnect)
 
    'Fill the DataSet with the selected records.
    myDataAdapter.Fill(dsNorthwind, "Customers")
 
    'Load the document with the DataSet.
    Dim doc as XmlDataDocument = new XmlDataDocument(dsNorthwind)  
 
    'Display the XmlDataDocument.
    doc.Save(Console.Out)
 
  end sub
end class

注解

将 XmlDataDocument 同步到指定的 DataSet。 中的任何DataSet数据都立即通过 .XmlDataDocument 中传播XmlDataDocument任何DataSet更改。 在与架构匹配的情况下，在架构中XmlDataDocument``DataSet所做的任何更改都传播到其中DataSet。

另请参阅

• SqlConnection
• SqlDataAdapter