RichTextBox中的对齐选项

Question

我正在开发一个应用程序，我想对齐在RichTextbox中输入的文本，类似于Word文档。

我已经在这个环节

http://social.msdn.microsoft.com/Forums/en-US/winforms/thread/455a6427-a3a2-4215-89a3-557114dbcddd

是否有人在VB代码简单的解决方案通过代码到哪里去了？

感谢

Answer 1

我发现了一个简单的VB代码来做到这一点，它工作得很好。链接在这里。

http://social.msdn.microsoft.com/Forums/en-US/winforms/thread/25045a28-b8c9-4146-9820-1231a58c5925/

我把代码太的情况下，我们失去了联系。

' Constants and structures from richedit.h 
Const MAX_TAB_STOPS = 32 ' expanded individually 
Const PFA_JUSTIFY = 4 ' Left = 1, Center = 2, Right = 3 
Const CBSIZE = 188 ' Size of PARAFORMAT2 structure 
Const PFM_ALIGNMENT = &H8 

Const WM_USER = &H400 
Const EM_DISPLAYBAND = WM_USER + 51 
Const EM_FORMATRANGE = WM_USER + 57 
Const EM_SETPARAFORMAT = WM_USER + 71 
Const EM_SETTARGETDEVICE = WM_USER + 72 

<StructLayout(LayoutKind.Sequential)> _ 
Private Structure PARAFORMAT2 
    Public cbSize As Int16 'UINT cbSize; 
    Public dwMask As Int32 'DWORD dwMask; 
    Public wNumbering As Int16 'WORD wNumbering; 
    Public wEffects As Int16 'WORD wEffects; 
    Public dxStartIndent As Int32 'LONG dxStartIndent; 
    Public dxRightIndent As Int32 'LONG dxRightIndent; 
    Public dxOffset As Int32 'LONG dxOffset; 
    Public wAlignment As Int16 'WORD wAlignment; 
    Public cTabCount As Int16 'SHORT cTabCount; 
    Public rgxTabs1 As Int32 'LONG rgxTabs[MAX_TAB_STOPS]; 
    Public rgxTabs2 As Int32 
    Public rgxTabs3 As Int32 
    Public rgxTabs4 As Int32 
    Public rgxTabs5 As Int32 
    Public rgxTabs6 As Int32 
    Public rgxTabs7 As Int32 
    Public rgxTabs8 As Int32 
    Public rgxTabs9 As Int32 
    Public rgxTabs10 As Int32 
    Public rgxTabs11 As Int32 
    Public rgxTabs12 As Int32 
    Public rgxTabs13 As Int32 
    Public rgxTabs14 As Int32 
    Public rgxTabs15 As Int32 
    Public rgxTabs16 As Int32 
    Public rgxTabs17 As Int32 
    Public rgxTabs18 As Int32 
    Public rgxTabs19 As Int32 
    Public rgxTabs20 As Int32 
    Public rgxTabs21 As Int32 
    Public rgxTabs22 As Int32 
    Public rgxTabs23 As Int32 
    Public rgxTabs24 As Int32 
    Public rgxTabs25 As Int32 
    Public rgxTabs26 As Int32 
    Public rgxTabs27 As Int32 
    Public rgxTabs28 As Int32 
    Public rgxTabs29 As Int32 
    Public rgxTabs30 As Int32 
    Public rgxTabs31 As Int32 
    Public rgxTabs32 As Int32 
    Public dySpaceBefore As Int32 'LONG dySpaceBefore; 
    Public dySpaceAfter As Int32 'LONG dySpaceAfter; 
    Public dyLineSpacing As Int32 'LONG dyLineSpacing; 
    Public sStyle As Int16 'SHORT sStyle; 
    Public bLineSpacingRule As Byte 'BYTE bLineSpacingRule; 
    Public bOutlineLevel As Byte 'BYTE bOutlineLevel; 
    Public wShadingWeight As Int16 'WORD wShadingWeight; 
    Public wShadingStyle As Int16 'WORD wShadingStyle; 
    Public wNumberingStart As Int16 'WORD wNumberingStart; 
    Public wNumberingStyle As Int16 'WORD wNumberingStyle; 
    Public wNumberingTab As Int16 'WORD wNumberingTab; 
    Public wBorderSpace As Int16 'WORD wBorderSpace; 
    Public wBorderwidth As Int16 'WORD wBorderWidth; 
    Public wBorders As Int16 'WORD wBorders; 
End Structure 

<DllImport("user32.dll")> _ 
Private Shared Function SendMessage(ByVal hWnd As IntPtr, _ 
           ByVal msg As Int32, _ 
           ByVal wParam As Int32, _ 
           ByVal lParam As IntPtr) As Int32 
End Function 

---

窗体设计器代码放在这里

---

Private Sub btnSetAlignment_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSetAlignment.Click 

    Dim pf2 As PARAFORMAT2 

    rtb.SelectAll() 

    pf2.cbSize = CBSIZE 
    pf2.dwMask = pf2.dwMask Or PFM_ALIGNMENT 
    pf2.wAlignment = PFA_JUSTIFY 

    ' Allocate memory for the PARAFORMAT2 struct and 
    ' copy the contents of the struct to this memory 
    Dim lParam As IntPtr 
    lParam = Marshal.AllocCoTaskMem(Marshal.SizeOf(pf2)) 
    Marshal.StructureToPtr(pf2, lParam, False) 

    Dim iRet As Integer 
    iRet = SendMessage(rtb.Handle(), EM_SETPARAFORMAT, 0, lParam) 

    ' Free allocated memory 
    Marshal.FreeCoTaskMem(lParam) 

End Sub 

Answer 2

看一看Extending RichTextBox。它类似于MSDN的例子，但有点简单。

Answer 3

尝试像

rtbox.SelectionStart = 0 'rtbox是RichTextBox的名称
rtbox.SelectionLength = rtbox.Text.Length
rtbox.SelectionAlignment = TextAlignment.Justify

' 对于其他文本比对
'rtbox.SelectionAlignment = TextAlignment.Left
' rtbox.SelectionAlignment = TextAlignment.Right
“rtbox.SelectionAlignment = TextAlignment.Cent呃

Answer 4

的解决方案并没有为我工作，除非我补充一下：

SendMessage(Handle, EM_SETTYPOGRAPHYOPTIONS, TO_ADVANCEDTYPOGRAPHY, TO_ADVANCEDTYPOGRAPHY) 

的完整代码：

Private Const EM_SETTYPOGRAPHYOPTIONS As Long = WM_USER + 202 
Private Const TO_ADVANCEDTYPOGRAPHY As Long = 1 

Private sub SetAlignJustify() 
    Dim Para As New Paraformat2 
    With Para 
     .cbSize = CUInt(Marshal.SizeOf(Para)) 
     .dwMask = PFM_ALIGNMENT 
     .wAlignment = value 
    End With 

    SendMessage(Handle, EM_SETTYPOGRAPHYOPTIONS, TO_ADVANCEDTYPOGRAPHY, TO_ADVANCEDTYPOGRAPHY) 


    Dim lpar As IntPtr = Marshal.AllocCoTaskMem(Marshal.SizeOf(Para)) 
    Marshal.StructureToPtr(Para, lpar, False) 
    Dim result As Integer = SendMessage(Handle, EM_SETPARAFORMAT, 0, lpar) 
    Marshal.FreeCoTaskMem(lpar) 
End Sub