XmlDocumentSchema Classe

Definição

public ref class XmlDocumentSchema sealed : System::Web::UI::Design::IDataSourceSchema

public sealed class XmlDocumentSchema : System.Web.UI.Design.IDataSourceSchema

type XmlDocumentSchema = class
    interface IDataSourceSchema

Public NotInheritable Class XmlDocumentSchema
Implements IDataSourceSchema

Herança

Object

XmlDocumentSchema

Implementações

IDataSourceSchema

Exemplos

O exemplo de código a seguir usa um XmlDocumentSchema objeto para exibir a estrutura de um documento XML em um TreeView controle .

// This method fills a TreeView Web control from an XML file.
public void FillTreeView(TreeView treeVw, string fileName)
{
    // Get a reference to the current HttpContext
    HttpContext currentContext = HttpContext.Current;
    int i, j, k;
    TreeNode CurNode, NewNode;

    // Create and load an XML document
    XmlDocument XDoc = new XmlDocument();
    XDoc.Load(currentContext.Server.MapPath(fileName));

    // Get a map of the XML Document
    XmlDocumentSchema xSchema = new XmlDocumentSchema(XDoc, "");

    // Get a list of the root child views
    IDataSourceViewSchema[] RootViews = xSchema.GetViews();

    // Add each child to the TreeView
    for (i = 0; i < RootViews.Length; i++)
    {
        NewNode = new TreeNode(RootViews[i].Name);
        treeVw.Nodes.Add(NewNode);
        CurNode = treeVw.Nodes[i];

        // Get a list of children of this child
        IDataSourceViewSchema[] ChildViews = RootViews[i].GetChildren();
        // Add each child to the child node of the TreeView
        for (j = 0; j < ChildViews.Length; j++)
        {
            NewNode = new TreeNode(ChildViews[j].Name);
            CurNode.ChildNodes.Add(NewNode);
            CurNode = CurNode.ChildNodes[j];

            // Get a list of children of this child
            IDataSourceViewSchema[] ChildVws = ChildViews[j].GetChildren();
            // Add each child to the child node
            for (k = 0; k < ChildVws.Length; k++)
            {
                NewNode = new TreeNode(ChildVws[k].Name);
                CurNode.ChildNodes.Add(NewNode);
            }
            // Select the parent of the current child
            CurNode = CurNode.Parent;
        }
        // Select the parent of the current child
        CurNode = CurNode.Parent;
    }
}

Imports System.Xml
Imports System.Web
Imports System.Web.UI.WebControls
Imports System.Web.UI.Design

Public Class XmlDocumentSchemaSample

    ' This method fills a TreeView Web control from an XML file.
    Public Sub FillTreeView(ByVal treeVw As TreeView, ByVal fileName As String)
        ' Get a reference to the current HttpContext
        Dim currentContext As HttpContext = HttpContext.Current
        Dim i, j, k As Integer
        Dim CurNode, NewNode As TreeNode

        ' Create and load an XML document
        Dim XDoc As New XmlDocument()
        XDoc.Load(currentContext.Server.MapPath(fileName))

        ' Get a map of the XML Document
        Dim xSchema As New XmlDocumentSchema(XDoc, "")

        ' Get a list of the root child views
        Dim RootViews As IDataSourceViewSchema() = xSchema.GetViews()

        ' Add each child to the TreeView
        For i = 0 To RootViews.Length - 1
            NewNode = New TreeNode(RootViews(i).Name)
            treeVw.Nodes.Add(NewNode)
            CurNode = treeVw.Nodes(i)

            ' Get a list of children of this child
            Dim ChildViews As IDataSourceViewSchema() = RootViews(i).GetChildren()

            ' Add each child to the child node of the TreeView
            For j = 0 To ChildViews.Length - 1
                NewNode = New TreeNode(ChildViews(j).Name)
                CurNode.ChildNodes.Add(NewNode)
                CurNode = CurNode.ChildNodes(j)

                ' Get a list of children of this child
                Dim ChildVws As IDataSourceViewSchema() = ChildViews(j).GetChildren()
                ' Add each child to the child node
                For k = 0 To ChildVws.Length - 1
                    NewNode = New TreeNode(ChildVws(k).Name)
                    CurNode.ChildNodes.Add(NewNode)
                Next
                ' Select the parent of the current child
                CurNode = CurNode.Parent
            Next
            ' Select the parent of the current child
            CurNode = CurNode.Parent
        Next
    End Sub
End Class

Comentários

A XmlDocumentSchema classe é usada por componentes personalizados do designer de controle para listar os elementos estruturais de um documento XML em tempo de design. Use a classe XmlDocumentSchema para preencher listas de elementos de documento para permitir que os usuários selecionem elementos de documento em recursos de interface do usuário em tempo de design.

Construtores

Métodos

Aplica-se a

Confira também

• XmlDocument
• IDataSourceSchema
• Estendendo o suporte para tempo de design