DataSet.WriteXmlSchema Metodo

public:
 void WriteXmlSchema(System::String ^ fileName, Converter<Type ^, System::String ^> ^ multipleTargetConverter);

public void WriteXmlSchema(string fileName, Converter<Type,string> multipleTargetConverter);

member this.WriteXmlSchema : string * Converter<Type, string> -> unit

Public Sub WriteXmlSchema (fileName As String, multipleTargetConverter As Converter(Of Type, String))

Parametri

public:
 void WriteXmlSchema(System::IO::Stream ^ stream);

public void WriteXmlSchema(System.IO.Stream stream);

member this.WriteXmlSchema : System.IO.Stream -> unit

Public Sub WriteXmlSchema (stream As Stream)

Parametri

Esempio

Nell'esempio seguente viene creato un nuovo FileStream oggetto passato al WriteXmlSchema metodo per scrivere lo schema su disco.

private void WriteSchemaWithFileStream(DataSet thisDataSet)
{
    // Set the file path and name. Modify this for your purposes.
    string filename="Schema.xml";

    // Create the FileStream object with the file name.
    // Use FileMode.Create.
    System.IO.FileStream stream =
        new System.IO.FileStream(filename,System.IO.FileMode.Create);

    // Write the schema to the file.
    thisDataSet.WriteXmlSchema(stream);

    // Close the FileStream.
    stream.Close();
}

Private Sub WriteSchemaWithFileStream(thisDataSet As DataSet)
    ' Set the file path and name. Modify this for your purposes.
    Dim filename As String = "Schema.xml"

    ' Create the FileStream object with the file name. 
    ' Use FileMode.Create.
    Dim stream As New System.IO.FileStream _
        (filename, System.IO.FileMode.Create)

    ' Write the schema to the file.
    thisDataSet.WriteXmlSchema(stream)

    ' Close the FileStream.
    stream.Close()
End Sub

Commenti

Utilizzare il WriteXmlSchema metodo per scrivere lo schema per un oggetto DataSet in un documento XML. Lo schema include definizioni di tabella, relazione e vincolo. Per scrivere uno schema in un documento XML, utilizzare il WriteXmlSchema metodo .

Lo schema XML viene scritto usando lo standard XSD.

Per scrivere i dati in un documento XML, utilizzare il WriteXml metodo .

Le classi che derivano dalla Stream classe includono BufferedStream, FileStream, MemoryStreame NetworkStream.

Vedi anche

• Using di set di dati in ADO.NET

public:
 void WriteXmlSchema(System::IO::TextWriter ^ writer);

public void WriteXmlSchema(System.IO.TextWriter writer);

member this.WriteXmlSchema : System.IO.TextWriter -> unit

Public Sub WriteXmlSchema (writer As TextWriter)

Parametri

Esempio

Nell'esempio seguente viene creato un System.Text.StringBuilder oggetto utilizzato per creare un nuovo System.IO.StringWriteroggetto . L'oggetto StringWriterWriteXmlSchema viene passato al metodo e la stringa risultante viene stampata nella finestra della console.

private void WriteSchemaWithStringWriter(DataSet thisDataSet)
{
    // Create a new StringBuilder object.
    System.Text.StringBuilder builder = new System.Text.StringBuilder();

    // Create the StringWriter object with the StringBuilder object.
    System.IO.StringWriter writer = new System.IO.StringWriter(builder);

    // Write the schema into the StringWriter.
    thisDataSet.WriteXmlSchema(writer);

    // Print the string to the console window.
    Console.WriteLine(writer.ToString());
}

Private Sub WriteSchemaWithStringWriter(thisDataSet As DataSet)
    ' Create a new StringBuilder object.
    Dim builder As New System.Text.StringBuilder()

    ' Create the StringWriter object with the StringBuilder object.
    Dim writer As New System.IO.StringWriter(builder)

    ' Write the schema into the StringWriter.
    thisDataSet.WriteXmlSchema(writer)

    ' Print the string to the console window.
    Console.WriteLine(writer.ToString())
End Sub

Commenti

Utilizzare il WriteXmlSchema metodo per scrivere lo schema per un oggetto DataSet in un documento XML. Lo schema include definizioni di tabella, relazione e vincolo. Per scrivere uno schema in un documento XML, utilizzare il WriteXmlSchema metodo .

Lo schema XML viene scritto usando lo standard XSD.

Per scrivere i dati in un documento XML, utilizzare il WriteXml metodo .

Le classi derivate dalla System.IO.TextWriter classe includono System.Web.HttpWriter, System.CodeDom.Compiler.IndentedTextWriter, System.Web.UI.HtmlTextWriterSystem.IO.StreamWriter, e System.IO.StringWriter.

Vedi anche

• Using di set di dati in ADO.NET

public:
 void WriteXmlSchema(System::String ^ fileName);

public void WriteXmlSchema(string fileName);

member this.WriteXmlSchema : string -> unit

Public Sub WriteXmlSchema (fileName As String)

Parametri

Eccezioni

Esempio

private void WriteSchemaToFile(DataSet thisDataSet)
{
    // Set the file path and name. Modify this for your purposes.
    string filename="Schema.xml";

    // Write the schema to the file.
    thisDataSet.WriteXmlSchema(filename);
}

Private Sub WriteSchemaToFile(thisDataSet As DataSet)
    ' Set the file path and name. Modify this for your purposes.
    Dim filename As String = "Schema.xml"

    ' Write the schema to the file.
    thisDataSet.WriteXmlSchema(filename)
End Sub

Commenti

Utilizzare il WriteXmlSchema metodo per scrivere lo schema per un oggetto DataSet in un documento XML. Lo schema include definizioni di tabella, relazione e vincolo. Per scrivere uno schema in un documento XML, utilizzare il WriteXmlSchema metodo .

Lo schema XML viene scritto usando lo standard XSD.

Per scrivere i dati in un documento XML, utilizzare il WriteXml metodo .

Vedi anche

• Using di set di dati in ADO.NET

public:
 void WriteXmlSchema(System::Xml::XmlWriter ^ writer);

public void WriteXmlSchema(System.Xml.XmlWriter writer);

member this.WriteXmlSchema : System.Xml.XmlWriter -> unit

Public Sub WriteXmlSchema (writer As XmlWriter)

Parametri

Esempio

Nell'esempio seguente viene creato un nuovo System.IO.FileStream oggetto con il percorso specificato. L'oggetto FileStream viene utilizzato per creare un XmlTextWriter oggetto . Il WriteXmlSchema metodo viene quindi richiamato con l'oggetto XmlTextWriter per scrivere lo schema sul disco.

private void WriteSchemaWithXmlTextWriter(DataSet thisDataSet)
{
    // Set the file path and name. Modify this for your purposes.
    string filename="SchemaDoc.xml";

    // Create a FileStream object with the file path and name.
    System.IO.FileStream stream = new System.IO.FileStream
        (filename,System.IO.FileMode.Create);

    // Create a new XmlTextWriter object with the FileStream.
    System.Xml.XmlTextWriter writer =
        new System.Xml.XmlTextWriter(stream,
        System.Text.Encoding.Unicode);

    // Write the schema into the DataSet and close the reader.
    thisDataSet.WriteXmlSchema(writer );
    writer.Close();
}

Private Sub WriteSchemaWithXmlTextWriter(thisDataSet As DataSet)
    ' Set the file path and name. Modify this for your purposes.
    Dim filename As String = "SchemaDoc.xml"

    ' Create a FileStream object with the file path and name.
    Dim stream As New System.IO.FileStream _
       (filename, System.IO.FileMode.Create)

    ' Create a new XmlTextWriter object with the FileStream.
    Dim writer As New System.Xml.XmlTextWriter _
       (stream, System.Text.Encoding.Unicode)

    ' Write the schema into the DataSet and close the reader.
    thisDataSet.WriteXmlSchema(writer)
    writer.Close()
End Sub

Commenti

Utilizzare il WriteXmlSchema metodo per scrivere lo schema per un oggetto DataSet in un documento XML. Lo schema include definizioni di tabella, relazione e vincolo. Per scrivere uno schema in un documento XML, utilizzare il WriteXmlSchema metodo .

Lo schema XML viene scritto usando lo standard XSD.

Per scrivere i dati in un documento XML, utilizzare il WriteXml metodo .

Una classe che eredita dalla System.Xml.XmlWriter classe è la XmlTextWriter classe .

Vedi anche

• Using di set di dati in ADO.NET

public:
 void WriteXmlSchema(System::IO::Stream ^ stream, Converter<Type ^, System::String ^> ^ multipleTargetConverter);

public void WriteXmlSchema(System.IO.Stream stream, Converter<Type,string> multipleTargetConverter);

member this.WriteXmlSchema : System.IO.Stream * Converter<Type, string> -> unit

Public Sub WriteXmlSchema (stream As Stream, multipleTargetConverter As Converter(Of Type, String))

Parametri

public:
 void WriteXmlSchema(System::IO::TextWriter ^ writer, Converter<Type ^, System::String ^> ^ multipleTargetConverter);

public void WriteXmlSchema(System.IO.TextWriter writer, Converter<Type,string> multipleTargetConverter);

member this.WriteXmlSchema : System.IO.TextWriter * Converter<Type, string> -> unit

Public Sub WriteXmlSchema (writer As TextWriter, multipleTargetConverter As Converter(Of Type, String))

Parametri

public:
 void WriteXmlSchema(System::Xml::XmlWriter ^ writer, Converter<Type ^, System::String ^> ^ multipleTargetConverter);

public void WriteXmlSchema(System.Xml.XmlWriter writer, Converter<Type,string> multipleTargetConverter);

member this.WriteXmlSchema : System.Xml.XmlWriter * Converter<Type, string> -> unit

Public Sub WriteXmlSchema (writer As XmlWriter, multipleTargetConverter As Converter(Of Type, String))

Parametri