'富文本框 WebBrowser里的KindEditor方法属性 <System.Runtime.InteropServices.ComVisibleAttribute(True)> _ Public Class KindEditor Public isReadOnly As Boolean =False '是否只读 Private _FullHtmlBindingField As String Private _InnerHtmlBindingField As String Private _FullHtml As String Private _InnerHtml As String '完整html内容 Property FullHtml() As String Get '获取属性的值 Return _FullHtml End Get Set(ByVal value As String) '设定属性的值 _FullHtml = value '同步更新绑定的列 If _FullHtmlBindingField <> "" Then Dim vs() As String = _FullHtmlBindingField.split(".") If vs.Length =2 Then Tables(vs(0)).Current(vs(1)) = value End If End If End Set End Property '纯文本内容 Property InnerHtml() As String Get '获取属性的值 Return _InnerHtml End Get Set(ByVal value As String) '设定属性的值 '1用正则表达式去掉所有空格和换行符 Static rgx As New RegularExpressions.Regex("\s") value = rgx.Replace(value,"") '2去掉base64的图片 Dim si As Integer = value.IndexOf("<imgsrc=""data:image/png;base64,") If si>-1 Then Dim ei As Integer = value.IndexOf("/>",si) Do While (ei>si AndAlso si >-1) value = value.Remove(si,ei-si+2) si = value.IndexOf("<imgsrc=""data:image/png;base64,") If si >-1 Then ei = value.IndexOf("/>",si) End If Loop End If '3去掉第二种格式的base64的图片 si = value.IndexOf("<imgwidth=") If si>-1 Then Dim ei As Integer = value.IndexOf("/>",si) Do While (ei>si AndAlso si >-1) value = value.Remove(si,ei-si+2) si = value.IndexOf("<imgwidth=") If si >-1 Then ei = value.IndexOf("/>",si) End If Loop End If _InnerHtml =value '同步更新绑定的列 If _InnerHtmlBindingField <> "" Then Dim vs() As String = _InnerHtmlBindingField.split(".") If vs.Length =2 Then Tables(vs(0)).Current(vs(1)) = value End If End If End Set End Property '把html内容绑定到某个列 Property FullHtmlBindingField() As String Get '获取属性的值 Return _FullHtmlBindingField End Get Set(ByVal value As String) '设定属性的值 '把当前列内容写入到FullHtml If value <> "" Then Dim vs() As String = value.split(".") If vs.Length =2 Then _FullHtml = Tables(vs(0)).Current(vs(1)) End If End If _FullHtmlBindingField= value End Set End Property '把纯文本内容绑定到某个列 Property InnerHtmlBindingField() As String Get '获取属性的值 Return _InnerHtmlBindingField End Get Set(ByVal value As String) '设定属性的值 '把当前列内容写入到InnerHtml If value <> "" Then Dim vs() As String = value.split(".") If vs.Length =2 Then _InnerHtml = Tables(vs(0)).Current(vs(1)) End If End If _InnerHtmlBindingField =value End Set End Property End Class
'从注册表升级WebBrowser内核为IE11,HKEY_CURRENT_USER的注册表修改不需要管理员权限. 'Foxtable安装时自动提升过,但是编译后的程序,依然默认使用IE6内核,需要手动升,否则会出现截图无法直接粘贴 Try Registry.SetValue("HKEY_CURRENT_USER\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION",System.Diagnostics.Process.GetCurrentProcess.ProcessName & ".exe",11001) Catch ex As Exception MessageBox.Show("狐表调用IE11内核失败,会导致富文本框无法粘贴图片" & vbcrlf & "Error:" & ex.Message ) End Try Dim wb = e.Form.Controls("webBrowser1").BaseControl wb.Url = new System.Uri(ProjectPath & "KindEditor\e.html", System.UriKind.Absolute) Dim ke As new KindEditor '必须创建一个新实例 wb.ObjectForScripting =ke
3.3把html写入富文本框
Dim wb = e.Form.Controls("WebBrowser1").BaseControl Dim ke = wb.ObjectForScripting Dim r As Row = Tables("表A").Current If r IsNot Nothing Then '把内容写入富文本框里 ke.FullHtml = r("完整html内容") wb.refresh '刷新 End If
Dim wb = e.Form.Controls("WebBrowser1").BaseControl Dim ke = wb.ObjectForScripting MessageBox.show(ke.FullHtml)
3.5从富文本框读取纯文本
Dim wb = e.Form.Controls("WebBrowser1").BaseControl Dim ke = wb.ObjectForScripting MessageBox.show(ke.InnerHtml)
在全局代码,利用正则和截取,过滤好了空格、换行符、base64图片。这个纯文本,其实是为了方便存入数据库搜索。
Dim wb As Object = e.Form.Controls("webBrowser1").BaseControl Dim ke = wb.ObjectForScripting ke.IsReadOnly =True wb.refresh
Dim dlg As New OpenFileDialog dlg.Filter = "Word文件|*.doc;*.docx" If dlg.ShowDialog =DialogResult.OK Then Dim fl As String = dlg.FileName Dim app As New MSWord.Application Try Dim wb = e.Form.Controls("WebBrowser1").BaseControl wb.Url = new System.Uri(ProjectPath & "KindEditor\e.html", System.UriKind.Absolute) Dim ke As new KindEditor '必须创建一个新实例 wb.ObjectForScripting =ke Application.DoEvents '1打开word并复制全文 Dim doc = app.Documents.Open(fl) app.Selection.WholeStory() app.Selection.Copy() '2富文本框触发粘贴js wb.Document.InvokeScript("eval", New String() {"editor.clickToolbar('paste');"}) '3关闭doc doc.Close '必须关闭,否则word会一直在后台被占用 Catch ex As exception MessageBox.Show(ex.message) Finally ClipBoard.Clear '清空剪切板 app.Quit End Try End If
感觉有点bug,不推荐用,还是老老实实自己控制读写好
Dim wb = e.Form.Controls("webBrowser1").BaseControl Dim ke = wb.ObjectForScripting Dim r As Row = Tables("表A").Current If r IsNot Nothing Then '绑定某个字段,当富文本框变化时,自动变化 ke.FullHtmlBindingField = "表A.完整html内容" ke.InnerHtmlBindingField = "表A.纯文本内容" wb.refresh '刷新 End If
Dim sr = New System.IO.StreamReader(ProjectPath & "我的记事本.txt") '直接从文件路径生成' Dim bigStr As String = sr.ReadToEnd() '读取所有内容 sr.Close '必须释放资源 Output.Show(bigStr)
不过一般也不建议写大量的内容,平时写100m的word文档,也基本只有上百万的标书才会有。
开发过程中,富文本框粘贴图片功能正常,但是发布后发现粘贴不了。那是因为WebBrowser内核版本过低,默认IE6导致的。
狐表程序安装的时候,改过注册表,把foxtable.exe进程的,都启动为IE11内核,但是我们编译后的程序,就不是叫foxtable.exe,于是就默认回IE6内核,导致粘贴功能失效了
所以可以在软件打开时,修改注册表提升好WebBrowser为IE11内核。修改一次后,以后都有效了
Try Registry.SetValue("HKEY_CURRENT_USER\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION",System.Diagnostics.Process.GetCurrentProcess.ProcessName & ".exe",11001) Catch ex As Exception MessageBox.Show("狐表调用IE11内核失败,会导致富文本框无法粘贴图片" & vbcrlf & "Error:" & ex.Message ) End Try
需要20210529后的普通开发版打开。没这个版本也问题不大,下载后把KindEditor文件夹拷贝出来,按照我上面的代码写就行了