把图象文件转换成XML格式文件代码,VB.Net代码库,德仔网

代码语言
代码分类
【VB.Net】把图象文件转换成XML格式文件
作者:孟宪会 / 发布于2011/5/3/ 1331
利用.NET 框架下的FromBase64String和ToBase64String方法可以很容易地实现图象文件和XML文件的互换。这样可以轻易解决以XML格式保存图片的问题
<div><!--StartFragment-->Public Class Form1
 Inherits System.Windows.Forms.Form

#Region " Windows 窗体设计器生成的代码 "
 Public Sub New()
 MyBase.New()
 InitializeComponent()
 '在 InitializeComponent() 调用之后添加任何初始化
 End Sub

 '窗体重写处置以清理组件列表。
 Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
 If disposing Then
 If Not (components Is Nothing) Then
 components.Dispose()
 End If
 End If
 MyBase.Dispose(disposing)
 End Sub

 'Windows 窗体设计器所必需的
 Private components As System.ComponentModel.IContainer
 '注意：以下过程是 Windows 窗体设计器所必需的
 '可以使用 Windows 窗体设计器修改此过程。
 '不要使用代码编辑器修改它。
 Friend WithEvents Button1 As System.Windows.Forms.Button
 Friend WithEvents Button2 As System.Windows.Forms.Button
 Friend WithEvents PictureBox1 As System.Windows.Forms.PictureBox
 Friend WithEvents Button3 As System.Windows.Forms.Button
 Friend WithEvents Label1 As System.Windows.Forms.Label
 Friend WithEvents Label2 As System.Windows.Forms.Label
 <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
 Me.Button1 = New System.Windows.Forms.Button()
 Me.Button2 = New System.Windows.Forms.Button()
 Me.PictureBox1 = New System.Windows.Forms.PictureBox()
 Me.Button3 = New System.Windows.Forms.Button()
 Me.Label1 = New System.Windows.Forms.Label()
 Me.Label2 = New System.Windows.Forms.Label()
 Me.SuspendLayout()
 '
 'Button1
 '
 Me.Button1.Location = New System.Drawing.Point(365, 63)
 Me.Button1.Name = "Button1"
 Me.Button1.Size = New System.Drawing.Size(115, 23)
 Me.Button1.TabIndex = 0
 Me.Button1.Text = "将图象保存成XML"
 '
 'Button2
 '
 Me.Button2.Location = New System.Drawing.Point(365, 98)
 Me.Button2.Name = "Button2"
 Me.Button2.Size = New System.Drawing.Size(115, 23)
 Me.Button2.TabIndex = 1
 Me.Button2.Text = "从XML中得到图象"
 '
 'PictureBox1
 '
 Me.PictureBox1.Location = New System.Drawing.Point(18, 6)
 Me.PictureBox1.Name = "PictureBox1"
 Me.PictureBox1.Size = New System.Drawing.Size(320, 460)
 Me.PictureBox1.TabIndex = 2
 Me.PictureBox1.TabStop = False
 '
 'Button3
 '
 Me.Button3.Location = New System.Drawing.Point(365, 28)
 Me.Button3.Name = "Button3"
 Me.Button3.Size = New System.Drawing.Size(115, 23)
 Me.Button3.TabIndex = 3
 Me.Button3.Text = "浏览图片&hellip;"
 '
 'Label1
 '
 Me.Label1.Location = New System.Drawing.Point(369, 135)
 Me.Label1.Name = "Label1"
 Me.Label1.Size = New System.Drawing.Size(105, 95)
 Me.Label1.TabIndex = 4
 '
 'Label2
 '
 Me.Label2.Location = New System.Drawing.Point(367, 437)
 Me.Label2.Name = "Label2"
 Me.Label2.Size = New System.Drawing.Size(130, 16)
 Me.Label2.TabIndex = 5
 Me.Label2.Text = "【孟宪会之精彩世界】"
 '
 'Form1
 '
 Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
 Me.ClientSize = New System.Drawing.Size(500, 480)
 Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.Label2, Me.Label1, Me.Button3, Me.PictureBox1, Me.Button2, Me.Button1})
 Me.Name = "Form1"
 Me.Text = "图象文件和XML格式文件互换例子"
 Me.ResumeLayout(False)

 End Sub

#End Region

 Private MyFile As String = ""
 Private MyFileExt As String = ""
 Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) _
 Handles Button2.Click
 Dim pic As String
 Dim MyXml As System.Xml.XmlDocument = New System.Xml.XmlDocument()
 MyXml.Load("c:\MyPhoto.xml")
 Dim picNode As System.Xml.XmlNode
 picNode = MyXml.SelectSingleNode("/pic/photo")
 pic = picNode.InnerText
 Dim memoryStream As System.IO.MemoryStream
 memoryStream = New System.IO.MemoryStream(Convert.FromBase64String(pic))
 Me.PictureBox1.Image = New System.Drawing.Bitmap(memoryStream)
 memoryStream.Close()
 End Sub

 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) _
 Handles Button1.Click
 If MyFile = "" Then
 MessageBox.Show("请选择一个图片！", "错误", MessageBoxButtons.OK, MessageBoxIcon.Warning)
 Exit Sub
 End If
 Dim MyImg As System.Drawing.Image = MyImg.FromFile(MyFile)
 Dim memoryStream As System.IO.MemoryStream = New System.IO.MemoryStream()
 MyImg.Save(memoryStream, GetImageType(MyFileExt))
 Dim b() As Byte
 b = memoryStream.GetBuffer()
 Dim pic As String = Convert.ToBase64String(b)
 memoryStream.Close()
 Dim MyXml As System.Xml.XmlDocument = New System.Xml.XmlDocument()
 MyXml.LoadXml("<pic><name>孟宪会</name><photo>" + pic + "</photo></pic>")
 MyXml.Save("c:\MyPhoto.xml")
 Label1.Text = "文件被保存到了：" + Microsoft.VisualBasic.ChrW(13) + "c:\MyPhoto.xml"
 End Sub

 Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) _
 Handles Button3.Click
 Dim openFileDialog1 As New OpenFileDialog()
 openFileDialog1.InitialDirectory = "c:\"
 openFileDialog1.Filter = "PNG(*.png)|*.png|Gif(*.gif)|*.gif|Jpg(*.jpg)|*.jpg|所有图象文件(*.*)|*.*"
 openFileDialog1.FilterIndex = 2
 openFileDialog1.RestoreDirectory = True
 If openFileDialog1.ShowDialog() = DialogResult.OK Then
 MyFile = openFileDialog1.FileName()
 MyFileExt = MyFile.Substring(MyFile.LastIndexOf(".") + 1)
 End If
 End Sub

 Public Function GetImageType(ByVal str As String) As System.Drawing.Imaging.ImageFormat
 Select Case str.ToLower()
 Case "jpg"
 Return System.Drawing.Imaging.ImageFormat.Jpeg
 Case "gif"
 Return System.Drawing.Imaging.ImageFormat.Gif
 Case "tiff"
 Return System.Drawing.Imaging.ImageFormat.Tiff()
 Case "icon"
 Return System.Drawing.Imaging.ImageFormat.Icon
 Case "image/png"
 Return System.Drawing.Imaging.ImageFormat.Png
 Case Else
 Return System.Drawing.Imaging.ImageFormat.MemoryBmp
 End Select
 End Function

 Private Sub Form1_Closing(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs) _
 Handles MyBase.Closing
 System.Diagnostics.Process.Start("IExplore.exe", "http://xml.sz.luohuedu.net/")
 End Sub
End Class
</div>
试试其它关键字
　XML格式文　
同语言下
可能有用的
孟宪会贡献的其它代码(15)