现在不少网页的blog都是利用了将网页设置为编辑模式实现。
本节探讨使用WebBrowser做一个本地文本编辑器。
使用到的知识包括：Vb.net、Javascript、Html
设计界面：
使用到的常量：
Private Const HTML_COMMAND_BOLD = "Bold" '加粗
Private Const HTML_COMMAND_UNDERLINE = "Underline" '下划线
Private Const HTML_COMMAND_ITALIC = "Italic" '斜体
Private Const HTML_COMMAND_SUBSCRIPT = "Subscript" '下标
Private Const HTML_COMMAND_SUPERSCRIPT = "Superscript" '上标
Private Const HTML_COMMAND_STRIKE_THROUGH = "StrikeThrough" '删除线
Private Const HTML_COMMAND_FONT_NAME = "FontName" '字体
Private Const HTML_COMMAND_FONT_SIZE = "FontSize" '字号
Private Const HTML_COMMAND_FORE_COLOR = "ForeColor" '字体前景色
Private Const HTML_COMMAND_BACK_COLOR = "BackColor" '字体背景色
Private Const HTML_COMMAND_INSERT_FORMAT_BLOCK = "FormatBlock" '加粗
Private Const HTML_COMMAND_REMOVE_FORMAT = "RemoveFormat" '清除样式
Private Const HTML_COMMAND_JUSTIFY_LEFT = "JustifyLeft" '文本左对齐
Private Const HTML_COMMAND_JUSTIFY_CENTER = "JustifyCenter" '文本中间对齐
Private Const HTML_COMMAND_JUSTIFY_RIGHT = "JustifyRight" '文本右对齐
Private Const HTML_COMMAND_JUSTIFY_FULL = "JustifyFull" '文本两端对齐
Private Const HTML_COMMAND_INDENT = "Indent" '增大缩进量
Private Const HTML_COMMAND_OUTDENT = "Outdent" '减小缩进量
Private Const HTML_COMMAND_INSERT_LINE = "InsertHorizontalRule" '插入分割符
Private Const HTML_COMMAND_INSERT_LIST = "Insert{0}List" ' replace with (Un)Ordered 插入项目符号或项目编号
Private Const HTML_COMMAND_INSERT_IMAGE = "InsertImage" '插入图像
Private Const HTML_COMMAND_INSERT_LINK = "CreateLink" '插入链接
Private Const HTML_COMMAND_REMOVE_LINK = "Unlink" '移除链接
Private Const HTML_COMMAND_TEXT_CUT = "Cut" '剪切
Private Const HTML_COMMAND_TEXT_COPY = "Copy" '复制
Private Const HTML_COMMAND_TEXT_PASTE = "Paste" '粘贴
Private Const HTML_COMMAND_TEXT_DELETE = "Delete" '删除
Private Const HTML_COMMAND_TEXT_UNDO = "Undo" '撤销
Private Const HTML_COMMAND_TEXT_REDO = "Redo" '恢复
Private Const HTML_COMMAND_TEXT_SELECT_ALL = "SelectAll" '全选
Private Const HTML_COMMAND_TEXT_UNSELECT = "Unselect" '取消选择
Private Const HTML_COMMAND_TEXT_PRINT = "Print" ' 打印
Private Const HTML_COMMAND_EDITMODE = "EditMode" ' 编辑模式
Private Const HTML_COMMAND_BROWSEMODE = "BrowseMode" ' 浏览模式
Private Const HTML_COMMAND_OVERWRITE = "OverWrite" '转换插入、覆写模式
窗体载入时设置字体和字号
Private Sub frmBlog_Load(sender As Object,e As EventArgs) Handles Me.Load
Dim linkhtm As String = "about:blank" 'Application.StartupPath & "\view.htm"
wbBlog.Url = New Uri(linkhtm)
wbBlog.Document.ExecCommand("EditMode",False,"") '设置为可编辑模式
Call setFontName()
Call setFontSize()
End Sub
' 设置字体
Private Sub setFontName()
Dim computerFont As New System.Drawing.Text.InstalledFontCollection
For Each font_family As FontFamily In computerFont.Families
If font_family.IsStyleAvailable(FontStyle.Regular) Then
tscFont.Items.Add(font_family.Name)
End If
Next
tscFont.SelectedIndex = 0
End Sub
'设置字号
Private Sub setFontSize()
tscFontSize.Items.Add("一号字")
tscFontSize.Items.Add("二号字")
tscFontSize.Items.Add("三号字")
tscFontSize.Items.Add("四号字")
tscFontSize.Items.Add("五号字")
tscFontSize.Items.Add("六号字")
tscFontSize.Items.Add("七号字")
tscFontSize.SelectedIndex = 0
End Sub
由于.net平台下C#和vb.NET很相似，本文也可以为C#爱好者提供参考。
学习更多vb.net知识，请参看 vb.net 教程 目录