在线等待：richtextbox 的问题？

devajasy 2003-12-16 10:12:07

各位，我现在在做一个聊天软件，实现类似qq的聊天室，每一行是一种颜色（没有图标）我在实现时用的是richtextbox，但是我新加一行后，前面的文本都变成黑色的了，怎么样才能不变？有什么好的建议和说法
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切换为时间正序

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jhzhou882 2003-12-16

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Private i As Integer
Private Sub Command1_Click()

If i Mod 2 = 0 Then
RichTextBox1.SelColor = vbRed
RichTextBox1.SelText = "12345" & vbCrLf
i = i + 1
Else
RichTextBox1.SelColor = vbBlue
RichTextBox1.SelText = "eeeee" & vbCrLf
i = i + 1
End If

End Sub

jhzhou882 2003-12-16

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Private i As Integer
Private Sub Command1_Click()
RichTextBox1.SelStart = 65535
If i Mod 2 = 0 Then
RichTextBox1.SelText = "12345" & vbNewLine
RichTextBox1.SelColor = vbRed
i = i + 1
Else
RichTextBox1.SelText = "eeeee" & vbNewLine
RichTextBox1.SelColor = vbBlue
i = i + 1
End If
End Sub

fangyds 2003-12-16

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ListView应该可以的

shwen 2003-12-16

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用 SelColor 设置将要加入的文字的颜色，以及其他 sel*** 属性设置其他效果
With Me.RichTextBox1
.SelStart = 65535
.SelColor = vbBlack
.SelText = "12345" & vbNewLine
.SelColor = vbRed
.SelText = "12345" & vbNewLine
.SelColor = vbBlue
.SelBold = True
.SelText = "12345" & vbNewLine
End With

taosihai1only 2003-12-16

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加上后，再设置forecolor属性，相当于再唰新

devajasy 2003-12-16

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forecolor? 谁的forecolor?

devajasy 2003-12-16

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表格控件? 那一种表格（在vb里）

yangfanatcsdn 2003-12-16

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换个思路：用表格控件试试

jornet 2003-12-16

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在加上后，再设置forecolor属性，相当于再唰新

让滚动条始终在最下面

C#第4章文本编辑器的实现的课件C#第4章文本编辑器的实现

基于.NET Framework 2.0的Windows窗体应用开发(MCP 70-526).pdf

课堂上老师发给我们的，一个用C#写的记事本PPt，详解。。。。。

Dim filem As String '保存文件名 Dim str As String Dim msg Dim bu As Boolean '用于判断文本框中的内容是否改变 Public Nexts As Double '用于存储查找末字符的位置 Public Sv, mo As Double 'sv用于存储查的下一个字符的位置，mo用于存储查找第一次查找字符的位置 Dim Cmt(3) As Single, Cml(3) As Single, Cmw(3) As Single, Cmh(3) As Single Dim Tt(1) As Single, Tl(1) As Single, Tw(1) As Single, Th(1) As Single Dim cht As Single, chl As Single, chw As Single, chh As Single Private Sub Check1_Click() If Check1.Value = 1 Then Label1.Caption = "要连接的末字符" Else Label1.Caption = "要查找的首字符" End If End Sub Private Sub Command1_Click() Dim Ts As String Dim a As Long a = 1048576 cmo1.Filter = "*.txt" cmo1.ShowOpen filem = cmo1.FileName If cmo1.FileName = "" Then Exit Sub End If Ts = Right(cmo1.FileName, 4) If Ts ".txt" Then MsgBox "您打开的非文本文档文件", , "提示" Exit Sub End If If FileLen(filem) \ a > 10 Then MsgBox "您打开的文件已超过10M", , "提示" Exit Sub End If RichTextBox1.FileName = cmo1.FileName bu = False Label3.Caption = "你打开的文件名为：" & filem If FileLen(filem) \ 1024 = 1 And FileLen(filem) / 1024 0 Then '文件有1M时 Label4.Caption = "文件大小为:" & Left(FileLen(filem) / a, 4) & "M" End If Exit Sub End Sub Private Sub Command2_Click() If Label1.Caption = "要查找的首字符" Then If Text1.Text = "" Then MsgBox "请输入要查找的内容" Exit Sub End If Timer3.Enabled = True Command1.Enabled = False Command2.Enabled = False '防止在程序忙时，用户点击其它按扭，导致程序崩溃。 Command3.Enabled = False Label2.Visible = True mo = InStr(RichTextBox1.Text, Text1.Text) Command1.Enabled = True Command2.Enabled = True Command3.Enabled = True Timer3.Enabled = False Label2.Visible = False Sv = mo RichTextBox1.SetFocus DoEvents RichTextBox1.SelStart = mo - 1 RichTextBox1.SelLength = Len(Text1.Text) Label1.Caption = "要查找的末字符" Text1.Text = "" '查找首字符 ElseIf Label1.Caption = "要查找的末字符" Then If Text1.Text = "" Then MsgBox "请输入要查找的内容" Exit Sub End If Timer3.Enabled = True Command1.Enabled = False Command2.Enabled = False Command3.Enabled = False Label2.Visible = True Nexts = InStr(Sv + Len(Text1.Text), RichTextBox1.Text, Text1.Text) 'sv后面加上文本长度是为了从字符后面位置开始查找，否则只会从已查找到字符位置前查找。这样会重复 Command1.Enabled = True Command2.Enabled = True Command3.Enabled = True Timer3.Enabled = False Label2.Visible = False If Nexts = 0 Then MsgBox "未查找到内容", , "提示" Exit Sub End If Sv = Nexts RichTextBox1.SetFocus RichTextBox1.SelStart = Nexts - 1 RichTextBox1.SelLength = Len(Text1.Text) Command2.Caption = "查找下一个" Command2.Enabled = False Timer1.Enabled = True '查找末字符，并把选中的代码交给时间控件 ElseIf Label1.Caption = "要连接的末字符" Then Timer3.Enabled = True Command1.Enabled = False Command2.Enabled = False Command3.Enabled = False Label2.Visible = True mo = InStr(Sv + Len(Text1.Text), RichTextBox1.Text, Text1.Text) Command1.Enabled = True Command2.Enabled = True Command3.Enabled = True Timer3.Enabled = False Label2.Visible = False If mo = 0 Then MsgBox "找不到" Exit Sub End If Sv = mo DoEvents RichTextBox1.SetFocus RichTextBox1.SelStart = mo - 1 RichTextBox1.SelLength = Len(Text1.Text) Command2.Caption = " 查找下一个" Command2.Enabled = False Timer2.Enabled = True '选中文本代码交给时间控件2完成 End If End Sub Private Sub Command3_Click() Call save MsgBox "保存成功" End Sub Private Sub Command4_Click() msg = MsgBox("是否删除选中的字符", vbYesNo + 64, "询问") If msg = vbYes Then str = Replace(RichTextBox1.Text, RichTextBox1.SelText, "") RichTextBox1.SelText = str End If End Sub Sub save() Open filem For Output As #1 Print #1, RichTextBox1.Text Close #1 End Sub Private Sub Form_Load() menpaste.Enabled = False Tt(0) = Text1.Top Tl(0) = Text1.Left Tw(0) = Text1.Width Th(0) = Text1.Height Tt(1) = RichTextBox1.Top Tl(1) = RichTextBox1.Left Tw(1) = RichTextBox1.Width Th(1) = RichTextBox1.Height '保存Combo1控件的Top、Left、Width和Height属性 Cmt(0) = Command1.Top Cml(0) = Command1.Left Cmw(0) = Command1.Width Cmh(0) = Command1.Height End Sub Private Sub Form_Unload(Cancel As Integer) If filem "" And bu = True Then msg = MsgBox("是否保存文件", vbYesNo + 64, "询问") If msg = vbYes Then Command1.Enabled = True Command2.Enabled = True Command3.Enabled = True Timer3.Enabled = False Label2.Visible = False Call save Command1.Enabled = True Command2.Enabled = True Command3.Enabled = True Timer3.Enabled = False Label2.Visible = False MsgBox "保存成功" End If End If End Sub Private Sub mencopy_Click() Clipboard.SetText RichTextBox1.SelText menpaste.Enabled = True End Sub Private Sub menexit_Click() End Sub Private Sub menpaste_Click() RichTextBox1.SelText = Clipboard.GetText End Sub Private Sub RichTextBox1_Change() bu = True If bu = True And filem "" Then Command3.Enabled = True End If End Sub Private Sub RichTextBox1_MouseDown(Button As Integer, Shift As Integer, x As Single, y As Single) If Button = vbRightButton Then PopupMenu menfile End If End Sub Private Sub Timer1_Timer() Static a As Integer a = a + 1 If a = 3 Then Command2.Enabled = True Timer1.Enabled = False '到时间后停止时间控件，以防多次运行 a = 0 msg = MsgBox("是否要将首末字符全部选中", vbYesNo + 64, "询问") '选中所查找的下一个字符 If msg = vbYes Then Timer3.Enabled = True Command1.Enabled = False Command2.Enabled = False Command3.Enabled = False Label2.Visible = True RichTextBox1.SetFocus RichTextBox1.SelStart = mo - 1 RichTextBox1.SelLength = Nexts Command1.Enabled = True Command2.Enabled = True Command3.Enabled = True Timer3.Enabled = False Label2.Visible = False Label1.Caption = "要查找的首字符" Command4.Enabled = True Command2.Caption = "开始查找" End If End If End Sub Private Sub Timer2_Timer() Static b As Integer b = b + 1 If b = 3 Then Timer2.Enabled = False Command2.Enabled = True b = 0 msg = MsgBox("是否从第一个文字到些内容位置全选中", vbYesNo + 64, "询问") If msg = vbYes Then Timer3.Enabled = True Command1.Enabled = False Command2.Enabled = False Command3.Enabled = False Label2.Visible = True RichTextBox1.SetFocus RichTextBox1.SelStart = 1 RichTextBox1.SelLength = mo Command1.Enabled = True Command2.Enabled = True Command3.Enabled = True Timer3.Enabled = False Label2.Visible = False Command4.Enabled = True End If End If End Sub Private Sub Timer3_Timer() Static s As Integer s = s + 1 prog1.Value = s If s Mod 2 = 0 Then DoEvents End If End Sub

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