vb.netxml布局的简单介绍

vb.net操作xml数据库(急)

使用System.XML

Imports Microsoft.VisualBasic

Imports System

Imports System.IO

Imports System.Xml

namespace HowTo.Samples.XML

public class WriteXmlFileSample

private const document as string = "newbooks.xml"

shared sub Main()

Dim myWriteXmlFileSample as WriteXmlFileSample

myWriteXmlFileSample = new WriteXmlFileSample()

myWriteXmlFileSample.Run(document)

end sub

public sub Run(args As String)

Dim myXmlTextReader as XmlTextReader = nothing

Dim myXmlTextWriter as XmlTextWriter = nothing

try

myXmlTextWriter = new XmlTextWriter (args, nothing)

myXmlTextWriter.Formatting = System.Xml.Formatting.Indented

myXmlTextWriter.WriteStartDocument(false)

myXmlTextWriter.WriteDocType("bookstore", nothing, "books.dtd", nothing)

myXmlTextWriter.WriteComment("此文件表示书店库存数据库的另一个片断")

myXmlTextWriter.WriteStartElement("bookstore")

myXmlTextWriter.WriteStartElement("book", nothing)

myXmlTextWriter.WriteAttributeString("genre","autobiography")

myXmlTextWriter.WriteAttributeString("publicationdate","1979")

myXmlTextWriter.WriteAttributeString("ISBN","0-7356-0562-9")

myXmlTextWriter.WriteElementString("title", nothing, "The Autobiography of Mark Twain")

myXmlTextWriter.WriteStartElement("Author", nothing)

myXmlTextWriter.WriteElementString("first-name", "Mark")

myXmlTextWriter.WriteElementString("last-name", "Twain")

myXmlTextWriter.WriteEndElement()

myXmlTextWriter.WriteElementString("price", "7.99")

myXmlTextWriter.WriteEndElement()

myXmlTextWriter.WriteEndElement()

'向文件写 XML 并关闭编写器

myXmlTextWriter.Flush()

myXmlTextWriter.Close()

' 读取返回的文件并进行分析以确保正确生成 XML

myXmlTextReader = new XmlTextReader (args)

FormatXml (myXmlTextReader, args)

catch e as Exception

Console.WriteLine ("异常：{0}", e.ToString())

finally

Console.WriteLine()

Console.WriteLine("对文件 {0} 的处理已完成。", args)

If Not myXmlTextReader Is Nothing

myXmlTextReader.Close()

end if

'关闭编写器

If Not myXmlTextWriter Is Nothing

myXmlTextWriter.Close()

end if

End try

End Sub

private shared Sub FormatXml (reader as XmlTextReader, filename as String)

Dim piCount, docCount, commentCount, elementCount as Integer

Dim attributeCount, textCount, whitespaceCount as Integer

While reader.Read()

Select (reader.NodeType)

case XmlNodeType.ProcessingInstruction:

Format (reader, "ProcessingInstruction")

piCount += 1

case XmlNodeType.DocumentType:

Format (reader, "DocumentType")

docCount += 1

case XmlNodeType.Comment:

Format (reader, "Comment")

commentCount += 1

case XmlNodeType.Element:

Format (reader, "Element")

elementCount += 1

While reader.MoveToNextAttribute()

Format (reader, "Attribute")

end While

if (reader.HasAttributes)

attributeCount += reader.AttributeCount

end if

case XmlNodeType.Text:

Format (reader, "Text")

textCount += 1

case XmlNodeType.Whitespace:

whitespaceCount += 1

End Select

End While

' 显示该文件的统计信息

Console.WriteLine ()

Console.WriteLine("{0} 文件的统计信息", filename)

Console.WriteLine ()

Console.WriteLine("处理指令：" piCount)

Console.WriteLine("文档类型：" docCount)

Console.WriteLine("注释：" commentCount)

Console.WriteLine("元素：" elementCount)

Console.WriteLine("属性：" attributeCount)

Console.WriteLine("文本：" textCount)

Console.WriteLine("空白：" whitespaceCount)

End Sub

private shared Sub Format(byref reader as XmlTextReader , NodeType as String)

' 格式化输出

Console.Write(reader.Depth " ")

Console.Write(reader.AttributeCount " ")

Dim i as Integer

for i = 0 to reader.Depth - 1

Console.Write(Strings.chr(9))

Next

Console.Write(reader.Prefix NodeType "" reader.Name "" reader.Value)

Console.WriteLine()

End Sub

End Class

End Namespace

参考:

vb.net xml 和treeview

你的xml文字有错误,正确的如下:

?xml version="1.0"?

grouplist

group name="1"

server name="1.1"/

server name="2.2"/

/group

group name="2"

server name="2.1"/

server name="2.2"/

/group

/grouplist

以下是在vs2008下调试成功

Public Class Form1

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

Dim tvw As TreeView

Dim x As New Xml.XmlDocument

Dim nd As Xml.XmlNode

Dim pcnd As TreeNode

Dim I As Integer

Dim II As Integer

tvw = New TreeView

tvw.Parent = Me

tvw.SetBounds(10, 10, 300, 300)

x.Load("该处为xml文件路径") '如 C:\abc.xml

For I = 1 To x.DocumentElement.ChildNodes.Count

nd = x.DocumentElement.ChildNodes(I - 1)

pcnd = tvw.Nodes.Add("G" I.ToString, nd.Attributes(0).Value)

For II = 1 To nd.ChildNodes.Count

pcnd.Nodes.Add(nd.ChildNodes(II - 1).Attributes(0).Value)

Next

pcnd.Expand()

Next

End Sub

End Class

vb.net中怎么创建xml文件并写数据

DataSet 和 DataTable都有现成vb.netxml布局的方法vb.netxml布局：WriteXml

DataTable tb = this.dataGridView1.DataSource as DataTable;

if(tb != null)

{

tb.WriteXml(@"C:\table.xml",true);

return;

}

DataView dv = this.dataGridView1.DataSource as DataView;

if(dv != null)

{

dv.Table.WriteXml(@"C:\table.xml",true);

return;

}

IList list = this.dataGridView1.DataSource as IList;

if(list != null)

{

//to do,如果是IList,就要你自己想办法导出了

//XmlDocument or XmlWriter都可以考虑

}

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