DataSet.WriteXmlSchema Metodo

Definizione

Spazio dei nomi:: System.Data

Assembly:: netstandard.dll, System.Data.Common.dll

Assembly:: System.Data.Common.dll

Assembly:: System.Data.dll

Assembly:: netstandard.dll

Importante

Alcune informazioni sono relative alla release non definitiva del prodotto, che potrebbe subire modifiche significative prima della release definitiva. Microsoft non riconosce alcuna garanzia, espressa o implicita, in merito alle informazioni qui fornite.

Scrive la DataSet struttura come XML Schema.

Overload

Nome	Descrizione
WriteXmlSchema(String, Converter<Type,String>)	Scrive la DataSet struttura come XML Schema in un file.
WriteXmlSchema(Stream)	Scrive la DataSet struttura come XML Schema nell'oggetto specificato Stream .
WriteXmlSchema(TextWriter)	Scrive la DataSet struttura come XML Schema nell'oggetto specificato TextWriter .
WriteXmlSchema(String)	Scrive la DataSet struttura come XML Schema in un file.
WriteXmlSchema(XmlWriter)	Scrive la DataSet struttura come XML Schema in un XmlWriter oggetto .
WriteXmlSchema(Stream, Converter<Type,String>)	Scrive la DataSet struttura come XML Schema nell'oggetto specificato Stream .
WriteXmlSchema(TextWriter, Converter<Type,String>)	Scrive la DataSet struttura come XML Schema nell'oggetto specificato TextWriter.
WriteXmlSchema(XmlWriter, Converter<Type,String>)	Scrive la DataSet struttura come XML Schema nell'oggetto specificato XmlWriter.

WriteXmlSchema(String, Converter<Type,String>)

Origine:: DataSet.cs

Origine:: DataSet.cs

Origine:: DataSet.cs

Origine:: DataSet.cs

Origine:: DataSet.cs

Scrive la DataSet struttura come XML Schema in un file.

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

[System.Diagnostics.CodeAnalysis.RequiresDynamicCode("Members from serialized types may use dynamic code generation.")]
[System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("Members from serialized types may be trimmed if not referenced directly.")]
public void WriteXmlSchema(string fileName, Converter<Type,string> multipleTargetConverter);

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

[System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("Members from serialized types may be trimmed if not referenced directly.")]
public void WriteXmlSchema(string fileName, Converter<Type,string> multipleTargetConverter);

[<System.Diagnostics.CodeAnalysis.RequiresDynamicCode("Members from serialized types may use dynamic code generation.")>]
[<System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("Members from serialized types may be trimmed if not referenced directly.")>]
member this.WriteXmlSchema : string * Converter<Type, string> -> unit

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

[<System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("Members from serialized types may be trimmed if not referenced directly.")>]
member this.WriteXmlSchema : string * Converter<Type, string> -> unit

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

Parametri

fileName: String

Nome del file in cui scrivere.

multipleTargetConverter: Converter<Type,String>

Delegato utilizzato per la conversione Type in stringa.

Attributi: RequiresDynamicCodeAttribute RequiresUnreferencedCodeAttribute

Si applica a

WriteXmlSchema(Stream)

Origine:: DataSet.cs

Origine:: DataSet.cs

Origine:: DataSet.cs

Origine:: DataSet.cs

Origine:: DataSet.cs

Scrive la DataSet struttura come XML Schema nell'oggetto specificato Stream .

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

[System.Diagnostics.CodeAnalysis.RequiresDynamicCode("Members from serialized types may use dynamic code generation.")]
[System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("Members from serialized types may be trimmed if not referenced directly.")]
public void WriteXmlSchema(System.IO.Stream? stream);

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

[System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("Members from serialized types may be trimmed if not referenced directly.")]
public void WriteXmlSchema(System.IO.Stream? stream);

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

[<System.Diagnostics.CodeAnalysis.RequiresDynamicCode("Members from serialized types may use dynamic code generation.")>]
[<System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("Members from serialized types may be trimmed if not referenced directly.")>]
member this.WriteXmlSchema : System.IO.Stream -> unit

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

[<System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("Members from serialized types may be trimmed if not referenced directly.")>]
member this.WriteXmlSchema : System.IO.Stream -> unit

Public Sub WriteXmlSchema (stream As Stream)

Parametri

stream: Stream

Oggetto Stream utilizzato per scrivere in un file.

Attributi: RequiresDynamicCodeAttribute RequiresUnreferencedCodeAttribute

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

Si applica a

WriteXmlSchema(TextWriter)

Origine:: DataSet.cs

Origine:: DataSet.cs

Origine:: DataSet.cs

Origine:: DataSet.cs

Origine:: DataSet.cs

Scrive la DataSet struttura come XML Schema nell'oggetto specificato TextWriter .

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

[System.Diagnostics.CodeAnalysis.RequiresDynamicCode("Members from serialized types may use dynamic code generation.")]
[System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("Members from serialized types may be trimmed if not referenced directly.")]
public void WriteXmlSchema(System.IO.TextWriter? writer);

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

[System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("Members from serialized types may be trimmed if not referenced directly.")]
public void WriteXmlSchema(System.IO.TextWriter? writer);

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

[<System.Diagnostics.CodeAnalysis.RequiresDynamicCode("Members from serialized types may use dynamic code generation.")>]
[<System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("Members from serialized types may be trimmed if not referenced directly.")>]
member this.WriteXmlSchema : System.IO.TextWriter -> unit

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

[<System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("Members from serialized types may be trimmed if not referenced directly.")>]
member this.WriteXmlSchema : System.IO.TextWriter -> unit

Public Sub WriteXmlSchema (writer As TextWriter)

Parametri

writer: TextWriter

Oggetto TextWriter con cui scrivere.

Attributi: RequiresDynamicCodeAttribute RequiresUnreferencedCodeAttribute

Esempio

Nell'esempio seguente viene creato un System.Text.StringBuilder oggetto utilizzato per creare un nuovo System.IO.StringWriteroggetto . L'oggetto StringWriter WriteXmlSchema 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

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.HtmlTextWriter System.IO.StreamWriter, e System.IO.StringWriter.

Vedi anche

Using di set di dati in ADO.NET

Si applica a

WriteXmlSchema(String)

Origine:: DataSet.cs

Origine:: DataSet.cs

Origine:: DataSet.cs

Origine:: DataSet.cs

Origine:: DataSet.cs

Scrive la DataSet struttura come XML Schema in un file.

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

[System.Diagnostics.CodeAnalysis.RequiresDynamicCode("Members from serialized types may use dynamic code generation.")]
[System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("Members from serialized types may be trimmed if not referenced directly.")]
public void WriteXmlSchema(string fileName);

public void WriteXmlSchema(string fileName);

[System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("Members from serialized types may be trimmed if not referenced directly.")]
public void WriteXmlSchema(string fileName);

[<System.Diagnostics.CodeAnalysis.RequiresDynamicCode("Members from serialized types may use dynamic code generation.")>]
[<System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("Members from serialized types may be trimmed if not referenced directly.")>]
member this.WriteXmlSchema : string -> unit

member this.WriteXmlSchema : string -> unit

[<System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("Members from serialized types may be trimmed if not referenced directly.")>]
member this.WriteXmlSchema : string -> unit

Public Sub WriteXmlSchema (fileName As String)

Parametri

fileName: String

Nome del file (incluso il percorso) in cui scrivere.

Attributi: RequiresDynamicCodeAttribute RequiresUnreferencedCodeAttribute

Eccezioni

SecurityException

FileIOPermission non è impostato su Write.

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

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

Si applica a

WriteXmlSchema(XmlWriter)

Origine:: DataSet.cs

Origine:: DataSet.cs

Origine:: DataSet.cs

Origine:: DataSet.cs

Origine:: DataSet.cs

Scrive la DataSet struttura come XML Schema in un XmlWriter oggetto .

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

[System.Diagnostics.CodeAnalysis.RequiresDynamicCode("Members from serialized types may use dynamic code generation.")]
[System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("Members from serialized types may be trimmed if not referenced directly.")]
public void WriteXmlSchema(System.Xml.XmlWriter? writer);

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

[System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("Members from serialized types may be trimmed if not referenced directly.")]
public void WriteXmlSchema(System.Xml.XmlWriter? writer);

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

[<System.Diagnostics.CodeAnalysis.RequiresDynamicCode("Members from serialized types may use dynamic code generation.")>]
[<System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("Members from serialized types may be trimmed if not referenced directly.")>]
member this.WriteXmlSchema : System.Xml.XmlWriter -> unit

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

[<System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("Members from serialized types may be trimmed if not referenced directly.")>]
member this.WriteXmlSchema : System.Xml.XmlWriter -> unit

Public Sub WriteXmlSchema (writer As XmlWriter)

Parametri

writer: XmlWriter

Oggetto XmlWriter in cui scrivere.

Attributi: RequiresDynamicCodeAttribute RequiresUnreferencedCodeAttribute

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

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

Si applica a

WriteXmlSchema(Stream, Converter<Type,String>)

Origine:: DataSet.cs

Origine:: DataSet.cs

Origine:: DataSet.cs

Origine:: DataSet.cs

Origine:: DataSet.cs

Scrive la DataSet struttura come XML Schema nell'oggetto specificato Stream .

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

[System.Diagnostics.CodeAnalysis.RequiresDynamicCode("Members from serialized types may use dynamic code generation.")]
[System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("Members from serialized types may be trimmed if not referenced directly.")]
public void WriteXmlSchema(System.IO.Stream? stream, Converter<Type,string> multipleTargetConverter);

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

[System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("Members from serialized types may be trimmed if not referenced directly.")]
public void WriteXmlSchema(System.IO.Stream? stream, Converter<Type,string> multipleTargetConverter);

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

[<System.Diagnostics.CodeAnalysis.RequiresDynamicCode("Members from serialized types may use dynamic code generation.")>]
[<System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("Members from serialized types may be trimmed if not referenced directly.")>]
member this.WriteXmlSchema : System.IO.Stream * Converter<Type, string> -> unit

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

[<System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("Members from serialized types may be trimmed if not referenced directly.")>]
member this.WriteXmlSchema : System.IO.Stream * Converter<Type, string> -> unit

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

Parametri

stream: Stream

Oggetto Stream in cui scrivere.

multipleTargetConverter: Converter<Type,String>

Delegato utilizzato per la conversione Type in stringa.

Attributi: RequiresDynamicCodeAttribute RequiresUnreferencedCodeAttribute

Si applica a

WriteXmlSchema(TextWriter, Converter<Type,String>)

Origine:: DataSet.cs

Origine:: DataSet.cs

Origine:: DataSet.cs

Origine:: DataSet.cs

Origine:: DataSet.cs

Scrive la DataSet struttura come XML Schema nell'oggetto specificato TextWriter.

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

[System.Diagnostics.CodeAnalysis.RequiresDynamicCode("Members from serialized types may use dynamic code generation.")]
[System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("Members from serialized types may be trimmed if not referenced directly.")]
public void WriteXmlSchema(System.IO.TextWriter? writer, Converter<Type,string> multipleTargetConverter);

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

[System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("Members from serialized types may be trimmed if not referenced directly.")]
public void WriteXmlSchema(System.IO.TextWriter? writer, Converter<Type,string> multipleTargetConverter);

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

[<System.Diagnostics.CodeAnalysis.RequiresDynamicCode("Members from serialized types may use dynamic code generation.")>]
[<System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("Members from serialized types may be trimmed if not referenced directly.")>]
member this.WriteXmlSchema : System.IO.TextWriter * Converter<Type, string> -> unit

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

[<System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("Members from serialized types may be trimmed if not referenced directly.")>]
member this.WriteXmlSchema : System.IO.TextWriter * Converter<Type, string> -> unit

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

Parametri

writer: TextWriter

Oggetto TextWriter in cui scrivere.

multipleTargetConverter: Converter<Type,String>

Delegato utilizzato per la conversione Type in stringa.

Attributi: RequiresDynamicCodeAttribute RequiresUnreferencedCodeAttribute

Si applica a

WriteXmlSchema(XmlWriter, Converter<Type,String>)

Origine:: DataSet.cs

Origine:: DataSet.cs

Origine:: DataSet.cs

Origine:: DataSet.cs

Origine:: DataSet.cs

Scrive la DataSet struttura come XML Schema nell'oggetto specificato XmlWriter.

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

[System.Diagnostics.CodeAnalysis.RequiresDynamicCode("Members from serialized types may use dynamic code generation.")]
[System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("Members from serialized types may be trimmed if not referenced directly.")]
public void WriteXmlSchema(System.Xml.XmlWriter? writer, Converter<Type,string> multipleTargetConverter);

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

[System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("Members from serialized types may be trimmed if not referenced directly.")]
public void WriteXmlSchema(System.Xml.XmlWriter? writer, Converter<Type,string> multipleTargetConverter);

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

[<System.Diagnostics.CodeAnalysis.RequiresDynamicCode("Members from serialized types may use dynamic code generation.")>]
[<System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("Members from serialized types may be trimmed if not referenced directly.")>]
member this.WriteXmlSchema : System.Xml.XmlWriter * Converter<Type, string> -> unit

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

[<System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("Members from serialized types may be trimmed if not referenced directly.")>]
member this.WriteXmlSchema : System.Xml.XmlWriter * Converter<Type, string> -> unit

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

Parametri

writer: XmlWriter

Oggetto XmlWriter in cui scrivere.

multipleTargetConverter: Converter<Type,String>

Delegato utilizzato per la conversione Type in stringa.

Attributi: RequiresDynamicCodeAttribute RequiresUnreferencedCodeAttribute

Si applica a

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