Vb.net 用户键入时突出显示特定文本
我正在编写一个代码,突出显示文本中重复的单词。当我添加一个按钮时,代码运行良好,用户必须按下按钮以检查重复项 但是我想做一个自动检查代码。我在处理RichTextBox.TextChanged的子例程中设置代码。问题是代码选择目标单词并高亮显示,但选择仍然存在,因此当键入新字母时,会清除高亮显示的内容 这是我的密码:Vb.net 用户键入时突出显示特定文本,vb.net,richtextbox,Vb.net,Richtextbox,我正在编写一个代码,突出显示文本中重复的单词。当我添加一个按钮时,代码运行良好,用户必须按下按钮以检查重复项 但是我想做一个自动检查代码。我在处理RichTextBox.TextChanged的子例程中设置代码。问题是代码选择目标单词并高亮显示,但选择仍然存在,因此当键入新字母时,会清除高亮显示的内容 这是我的密码: Private Sub RichTextBox_TextChanged(sender As Object, e As EventArgs) Handles RichTextBox.
Private Sub RichTextBox_TextChanged(sender As Object, e As EventArgs) Handles RichTextBox.TextChanged
Try
Call duplicate_check()
Catch ex As Exception
MessageBox.Show("error in RichTextBox.TextChanged")
End Try
End Sub
重复检查功能:
Private Sub duplicate_check()
Try
' read line by line and get input
Dim LineByLineInput() As String = RichTextBox.Lines
Dim selectionStart, selectionLength As Integer
Dim i, j As Integer
For lineNumber = 0 To UBound(LineByLineInput)
selectionStart = 0
selectionLength = 0
'get index of first char index in the current line
Dim count As Integer = lineNumber
While count <> 0
selectionStart += RichTextBox.Lines(count - 1).Length + 1
count -= 1
End While
' get line as string
Dim line As String = RichTextBox.Lines(lineNumber)
' split line into array of strings
Dim input() As String = line.Split(" ")
'check for duplicates
i = 0
For j = i + 1 To UBound(input)
If input(i) = input(j) Then 'compare each 2 consecutive words if they are the same
selectionStart += input(i).Length + 1
selectionLength = input(i).Length
RichTextBox.SelectionStart = selectionStart
RichTextBox.SelectionLength = selectionLength
RichTextBox.SelectionBackColor = Color.Yellow
Else
selectionStart += input(i).Length + 1
End If
i += 1
Next
Next
Catch ex As Exception
MessageBox.Show("error duplicate_check()")
End Try
End Sub
私有子副本检查()
尝试
'逐行读取并获取输入
Dim LineByLineInput()作为String=RichTextBox.Lines
Dim selectionStart,selectionLength为整数
作为整数的Dim i,j
对于lineNumber=0,为UBound(LineByLineInput)
selectionStart=0
selectionLength=0
'获取当前行中第一个字符索引的索引
Dim计数为整数=行号
而计数为0
selectionStart+=RichTextBox.Lines(计数-1)。长度+1
计数-=1
结束时
'将行作为字符串获取
按字符串标注行=RichTextBox.Lines(行号)
'将行拆分为字符串数组
Dim input()作为字符串=line.Split(“”)
'检查重复项
i=0
对于j=i+1至UBound(输入)
如果输入(i)=输入(j),则“比较两个连续单词是否相同”
selectionStart+=输入(i)。长度+1
selectionLength=输入(i).长度
RichTextBox.SelectionStart=SelectionStart
RichTextBox.SelectionLength=SelectionLength
RichTextBox.SelectionBackColor=Color.Yellow
其他的
selectionStart+=输入(i)。长度+1
如果结束
i+=1
下一个
下一个
特例
MessageBox.Show(“错误重复检查()”)
结束尝试
端接头
在重复检查呼叫后,您是否尝试将RichTextBox的选择设置回原来的位置
见下文:
Private Sub RichTextBox1_TextChanged(sender As Object, e As System.EventArgs) Handles RichTextBox1.TextChanged
Try
' Get current position
Dim cur_pos As Integer = Me.RichTextBox.SelectionStart
Call duplicate_check()
' Set back to old position
Me.RichTextBox.SelectionStart = cur_pos
' Unselect what your sub duplicate_check has selected
Me.RichTextBox1.SelectionLength = 0
Catch ex As Exception
MessageBox.Show("error in RichTextBox.TextChanged")
End Try
End Sub
如果此解决方案适合您,您应该更改您的复制检查子项以进行此更改,而不是在RichTextBox1\u TextChanged子项中进行此更改为什么复制项必须保持选中状态?如果有多个副本呢?只需突出显示文本,让他们不受干扰地继续键入。@a朋友,突出显示文本后如何取消选择文本?看一看“是”,这会产生另一个问题,如果用户将光标移动到特定位置(编辑文本或s.th),光标将再次移动到程序末尾。。谁能帮帮我