RTB und manuelle LInks

[Taladan]

Die Richtextbox besitzt ja die Möglichkeit links an zu Zeigen. (DetectURL)

Doch wie kann ich diese Funktion nutzen um einfach anklickbare Elemente in einen Text zu erzeugen?

Meine Probleme:
1. Ich habe keine Ahnung wie ich diese Art von "Link" in der RTB einbringen soll
2. Wie ich die RTB dann überrede, diesen Link als Link an zu zeigen
3. Wie ich den Link dann ausführe (erklärt sich bestimmt, wenn ich obriges weiß)

Mein ziel ist es eine art fester Text zu generieren. Der jedoch auch mehreren nicht festgelegten Elementen existieren soll. Dieser Text soll manipuliert werden können. jedoch ausschließlich an bestimmten stellen. Die Werte werden in einer DB abgespeichert um von dort wieder den Text zu generieren.

Ziel ist es, eine Textbox wie der Regeleditor in Outlook zu erzeugen.

Siehe Anhang

Weiß jemand Rat, oder zumindest Ansätze, womit ich weiter machen kann?

[Taladan]

Ich weiß mitlerweile, das man die Links über
LinkClickedEventArgs editieren kann. Nur habe ich NIRGENDS bisher ein nutzbares/übertragbares Beispiel gefunden.

[Robert_G]

Ich kann dir nur sagen, dass es die RTB intern so löst:

Delphi-Quellcode:

method RichTextBox.set_DetectUrls(value: Boolean);
begin
  if (self.autoUrlDetect <> value) then
  begin
    autoUrlDetect := value;
    if (inherited IsHandleCreated) then
    begin
      inherited SendMessage(1115, iif(value, 1, 0), 0);
      if (inherited IsHandleCreated) then
      begin
        RepokeText();
      end;
    end;
  end;
end;

Das heißt: Es gibt wohl keine managed Implementierung dafür. Sorry, mehr kann ich dazu auch nicht sagen...

Nachtrag: Auch in .Net 2.0 konnte nicht viele Änderungen sehen:

Delphi-Quellcode:

method RichTextBox.set_DetectUrls(value: Boolean);
begin
  if (value <> self.DetectUrls) then
  begin
    richTextBoxFlags.Item[RichTextBox.autoUrlDetectSection] := iif(value, 1, 0);
    if (inherited IsHandleCreated) then
    begin
      inherited SendMessage(1115, iif(value, 1, 0), 0);
      inherited RecreateHandle
    end
  end
end;

Vielleicht findest du bei www.codeproject.com eine passende RichTextbox-Ableitung?

[Taladan]

Gefunden habe ich das passende
http://www.codeproject.com/cs/miscct...xtBoxLinks.asp
Leider verstehe ich 1. kein C# 2. nicht sooo gut Englisch.
Kann jemand helfen?

[Taladan]

Hier der C# Code

Code:

using System;
using System.ComponentModel;
using System.Drawing;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace RichTextBoxLinks
{
   public class RichTextBoxEx : RichTextBox
   {
      #region Interop-Defines
      [ StructLayout( LayoutKind.Sequential )]
      private struct CHARFORMAT2_STRUCT
      {
         public UInt32   cbSize; 
         public UInt32   dwMask; 
         public UInt32   dwEffects; 
         public Int32    yHeight; 
         public Int32    yOffset; 
         public Int32   crTextColor; 
         public byte     bCharSet; 
         public byte     bPitchAndFamily; 
         [MarshalAs(UnmanagedType.ByValArray, SizeConst=32)]
         public char[]   szFaceName; 
         public UInt16   wWeight;
         public UInt16   sSpacing;
         public int      crBackColor; // Color.ToArgb() -> int
         public int      lcid;
         public int      dwReserved;
         public Int16   sStyle;
         public Int16   wKerning;
         public byte      bUnderlineType;
         public byte      bAnimation;
         public byte      bRevAuthor;
         public byte      bReserved1;
      }

      [DllImport("user32.dll", CharSet=CharSet.Auto)]
      private static extern IntPtr SendMessage(IntPtr hWnd, int msg, IntPtr wParam, IntPtr lParam);

      private const int WM_USER          = 0x0400;
      private const int EM_GETCHARFORMAT    = WM_USER+58;
      private const int EM_SETCHARFORMAT    = WM_USER+68;

      private const int SCF_SELECTION   = 0x0001;
      private const int SCF_WORD      = 0x0002;
      private const int SCF_ALL      = 0x0004;

      #region CHARFORMAT2 Flags
      private const UInt32 CFE_BOLD      = 0x0001;
      private const UInt32 CFE_ITALIC      = 0x0002;
      private const UInt32 CFE_UNDERLINE   = 0x0004;
      private const UInt32 CFE_STRIKEOUT   = 0x0008;
      private const UInt32 CFE_PROTECTED   = 0x0010;
      private const UInt32 CFE_LINK      = 0x0020;
      private const UInt32 CFE_AUTOCOLOR   = 0x40000000;
      private const UInt32 CFE_SUBSCRIPT   = 0x00010000;      /* Superscript and subscript are */
      private const UInt32 CFE_SUPERSCRIPT= 0x00020000;      /*  mutually exclusive          */

      private const int CFM_SMALLCAPS      = 0x0040;         /* (*)   */
      private const int CFM_ALLCAPS      = 0x0080;         /* Displayed by 3.0   */
      private const int CFM_HIDDEN      = 0x0100;         /* Hidden by 3.0 */
      private const int CFM_OUTLINE      = 0x0200;         /* (*)   */
      private const int CFM_SHADOW      = 0x0400;         /* (*)   */
      private const int CFM_EMBOSS      = 0x0800;         /* (*)   */
      private const int CFM_IMPRINT      = 0x1000;         /* (*)   */
      private const int CFM_DISABLED      = 0x2000;
      private const int CFM_REVISED      = 0x4000;

      private const int CFM_BACKCOLOR      = 0x04000000;
      private const int CFM_LCID         = 0x02000000;
      private const int CFM_UNDERLINETYPE   = 0x00800000;      /* Many displayed by 3.0 */
      private const int CFM_WEIGHT      = 0x00400000;
      private const int CFM_SPACING      = 0x00200000;      /* Displayed by 3.0   */
      private const int CFM_KERNING      = 0x00100000;      /* (*)   */
      private const int CFM_STYLE         = 0x00080000;      /* (*)   */
      private const int CFM_ANIMATION      = 0x00040000;      /* (*)   */
      private const int CFM_REVAUTHOR      = 0x00008000;


      private const UInt32 CFM_BOLD      = 0x00000001;
      private const UInt32 CFM_ITALIC      = 0x00000002;
      private const UInt32 CFM_UNDERLINE   = 0x00000004;
      private const UInt32 CFM_STRIKEOUT   = 0x00000008;
      private const UInt32 CFM_PROTECTED   = 0x00000010;
      private const UInt32 CFM_LINK      = 0x00000020;
      private const UInt32 CFM_SIZE      = 0x80000000;
      private const UInt32 CFM_COLOR      = 0x40000000;
      private const UInt32 CFM_FACE      = 0x20000000;
      private const UInt32 CFM_OFFSET      = 0x10000000;
      private const UInt32 CFM_CHARSET   = 0x08000000;
      private const UInt32 CFM_SUBSCRIPT   = CFE_SUBSCRIPT | CFE_SUPERSCRIPT;
      private const UInt32 CFM_SUPERSCRIPT= CFM_SUBSCRIPT;

      private const byte CFU_UNDERLINENONE      = 0x00000000;
      private const byte CFU_UNDERLINE         = 0x00000001;
      private const byte CFU_UNDERLINEWORD      = 0x00000002; /* (*) displayed as ordinary underline   */
      private const byte CFU_UNDERLINEDOUBLE      = 0x00000003; /* (*) displayed as ordinary underline   */
      private const byte CFU_UNDERLINEDOTTED      = 0x00000004;
      private const byte CFU_UNDERLINEDASH      = 0x00000005;
      private const byte CFU_UNDERLINEDASHDOT      = 0x00000006;
      private const byte CFU_UNDERLINEDASHDOTDOT   = 0x00000007;
      private const byte CFU_UNDERLINEWAVE      = 0x00000008;
      private const byte CFU_UNDERLINETHICK      = 0x00000009;
      private const byte CFU_UNDERLINEHAIRLINE   = 0x0000000A; /* (*) displayed as ordinary underline   */

      #endregion

      #endregion

      public RichTextBoxEx()
      {
         // Otherwise, non-standard links get lost when user starts typing
         // next to a non-standard link
         this.DetectUrls = false;
      }

      [DefaultValue(false)]
      public new bool DetectUrls
      {
         get { return base.DetectUrls; }
         set { base.DetectUrls = value; }
      }

      /// <summary>
      /// Insert a given text as a link into the RichTextBox at the current insert position.
      /// </summary>
      /// <param name="text">Text to be inserted</param>
      public void InsertLink(string text)
      {
         InsertLink(text, this.SelectionStart);
      }

      /// <summary>
      /// Insert a given text at a given position as a link. 
      /// </summary>
      /// <param name="text">Text to be inserted</param>
      /// <param name="position">Insert position</param>
      public void InsertLink(string text, int position)
      {
         if (position < 0 || position > this.Text.Length)
            throw new ArgumentOutOfRangeException("position");

         this.SelectionStart = position;
         this.SelectedText = text;
         this.Select(position, text.Length);
         this.SetSelectionLink(true);
         this.Select(position + text.Length, 0);
      }
      
      /// <summary>
      /// Insert a given text at at the current input position as a link.
      /// The link text is followed by a hash (#) and the given hyperlink text, both of
      /// them invisible.
      /// When clicked on, the whole link text and hyperlink string are given in the
      /// LinkClickedEventArgs.
      /// </summary>
      /// <param name="text">Text to be inserted</param>
      /// <param name="hyperlink">Invisible hyperlink string to be inserted</param>
      public void InsertLink(string text, string hyperlink)
      {
         InsertLink(text, hyperlink, this.SelectionStart);
      }

      /// <summary>
      /// Insert a given text at a given position as a link. The link text is followed by
      /// a hash (#) and the given hyperlink text, both of them invisible.
      /// When clicked on, the whole link text and hyperlink string are given in the
      /// LinkClickedEventArgs.
      /// </summary>
      /// <param name="text">Text to be inserted</param>
      /// <param name="hyperlink">Invisible hyperlink string to be inserted</param>
      /// <param name="position">Insert position</param>
      public void InsertLink(string text, string hyperlink, int position)
      {
         if (position < 0 || position > this.Text.Length)
            throw new ArgumentOutOfRangeException("position");

         this.SelectionStart = position;
         this.SelectedRtf = @"{\rtf1\ansi "+text+@"\v #"+hyperlink+@"\v0}";
         this.Select(position, text.Length + hyperlink.Length + 1);
         this.SetSelectionLink(true);
         this.Select(position + text.Length + hyperlink.Length + 1, 0);
      }

      /// <summary>
      /// Set the current selection's link style
      /// </summary>
      /// <param name="link">true: set link style, false: clear link style</param>
      public void SetSelectionLink(bool link)
      {
         SetSelectionStyle(CFM_LINK, link ? CFE_LINK : 0);
      }
      /// <summary>
      /// Get the link style for the current selection
      /// </summary>
      /// <returns>0: link style not set, 1: link style set, -1: mixed</returns>
      public int GetSelectionLink()
      {
         return GetSelectionStyle(CFM_LINK, CFE_LINK);
      }


      private void SetSelectionStyle(UInt32 mask, UInt32 effect)
      {
         CHARFORMAT2_STRUCT cf = new CHARFORMAT2_STRUCT();
         cf.cbSize = (UInt32)Marshal.SizeOf(cf);
         cf.dwMask = mask;
         cf.dwEffects = effect;

         IntPtr wpar = new IntPtr(SCF_SELECTION);
         IntPtr lpar = Marshal.AllocCoTaskMem( Marshal.SizeOf( cf ) ); 
         Marshal.StructureToPtr(cf, lpar, false);

         IntPtr res = SendMessage(Handle, EM_SETCHARFORMAT, wpar, lpar);

         Marshal.FreeCoTaskMem(lpar);
      }

      private int GetSelectionStyle(UInt32 mask, UInt32 effect)
      {
         CHARFORMAT2_STRUCT cf = new CHARFORMAT2_STRUCT();
         cf.cbSize = (UInt32)Marshal.SizeOf(cf);
         cf.szFaceName = new char[32];

         IntPtr wpar = new IntPtr(SCF_SELECTION);
         IntPtr lpar =    Marshal.AllocCoTaskMem( Marshal.SizeOf( cf ) ); 
         Marshal.StructureToPtr(cf, lpar, false);

         IntPtr res = SendMessage(Handle, EM_GETCHARFORMAT, wpar, lpar);

         cf = (CHARFORMAT2_STRUCT)Marshal.PtrToStructure(lpar, typeof(CHARFORMAT2_STRUCT));

         int state;
         // dwMask holds the information which properties are consistent throughout the selection:
         if ((cf.dwMask & mask) == mask) 
         {
            if ((cf.dwEffects & effect) == effect)
               state = 1;
            else
               state = 0;
         }
         else
         {
            state = -1;
         }
         
         Marshal.FreeCoTaskMem(lpar);
         return state;
      }
   }
}

[Taladan]

Und mit diesen Bereich kann ich nichts anfangen. Was soll das sein, und was macht dieser Bereich

Delphi-Quellcode:

      #region Interop-Defines
      [ StructLayout( LayoutKind.Sequential )]
      private struct CHARFORMAT2_STRUCT
      {
         public UInt32   cbSize; 
         public UInt32   dwMask; 
         public UInt32   dwEffects; 
         public Int32    yHeight; 
         public Int32    yOffset; 
         public Int32   crTextColor; 
         public byte     bCharSet; 
         public byte     bPitchAndFamily; 
         [MarshalAs(UnmanagedType.ByValArray, SizeConst=32)]
         public char[]   szFaceName; 
         public UInt16   wWeight;
         public UInt16   sSpacing;
         public int      crBackColor; // Color.ToArgb() -> int
         public int      lcid;
         public int      dwReserved;
         public Int16   sStyle;
         public Int16   wKerning;
         public byte      bUnderlineType;
         public byte      bAnimation;
         public byte      bRevAuthor;
         public byte      bReserved1;
      }

      [DllImport("user32.dll", CharSet=CharSet.Auto)]
      private static extern IntPtr SendMessage(IntPtr hWnd, int msg, IntPtr wParam, IntPtr lParam);

      private const int WM_USER          = 0x0400;
      private const int EM_GETCHARFORMAT    = WM_USER+58;
      private const int EM_SETCHARFORMAT    = WM_USER+68;

      private const int SCF_SELECTION   = 0x0001;
      private const int SCF_WORD      = 0x0002;
      private const int SCF_ALL      = 0x0004;

      #region CHARFORMAT2 Flags
      private const UInt32 CFE_BOLD      = 0x0001;
      private const UInt32 CFE_ITALIC      = 0x0002;
      private const UInt32 CFE_UNDERLINE   = 0x0004;
      private const UInt32 CFE_STRIKEOUT   = 0x0008;
      private const UInt32 CFE_PROTECTED   = 0x0010;
      private const UInt32 CFE_LINK      = 0x0020;
      private const UInt32 CFE_AUTOCOLOR   = 0x40000000;
      private const UInt32 CFE_SUBSCRIPT   = 0x00010000;      /* Superscript and subscript are */
      private const UInt32 CFE_SUPERSCRIPT= 0x00020000;      /*  mutually exclusive          */

      private const int CFM_SMALLCAPS      = 0x0040;         /* (*)   */
      private const int CFM_ALLCAPS      = 0x0080;         /* Displayed by 3.0   */
      private const int CFM_HIDDEN      = 0x0100;         /* Hidden by 3.0 */
      private const int CFM_OUTLINE      = 0x0200;         /* (*)   */
      private const int CFM_SHADOW      = 0x0400;         /* (*)   */
      private const int CFM_EMBOSS      = 0x0800;         /* (*)   */
      private const int CFM_IMPRINT      = 0x1000;         /* (*)   */
      private const int CFM_DISABLED      = 0x2000;
      private const int CFM_REVISED      = 0x4000;

      private const int CFM_BACKCOLOR      = 0x04000000;
      private const int CFM_LCID         = 0x02000000;
      private const int CFM_UNDERLINETYPE   = 0x00800000;      /* Many displayed by 3.0 */
      private const int CFM_WEIGHT      = 0x00400000;
      private const int CFM_SPACING      = 0x00200000;      /* Displayed by 3.0   */
      private const int CFM_KERNING      = 0x00100000;      /* (*)   */
      private const int CFM_STYLE         = 0x00080000;      /* (*)   */
      private const int CFM_ANIMATION      = 0x00040000;      /* (*)   */
      private const int CFM_REVAUTHOR      = 0x00008000;


      private const UInt32 CFM_BOLD      = 0x00000001;
      private const UInt32 CFM_ITALIC      = 0x00000002;
      private const UInt32 CFM_UNDERLINE   = 0x00000004;
      private const UInt32 CFM_STRIKEOUT   = 0x00000008;
      private const UInt32 CFM_PROTECTED   = 0x00000010;
      private const UInt32 CFM_LINK      = 0x00000020;
      private const UInt32 CFM_SIZE      = 0x80000000;
      private const UInt32 CFM_COLOR      = 0x40000000;
      private const UInt32 CFM_FACE      = 0x20000000;
      private const UInt32 CFM_OFFSET      = 0x10000000;
      private const UInt32 CFM_CHARSET   = 0x08000000;
      private const UInt32 CFM_SUBSCRIPT   = CFE_SUBSCRIPT | CFE_SUPERSCRIPT;
      private const UInt32 CFM_SUPERSCRIPT= CFM_SUBSCRIPT;

      private const byte CFU_UNDERLINENONE      = 0x00000000;
      private const byte CFU_UNDERLINE         = 0x00000001;
      private const byte CFU_UNDERLINEWORD      = 0x00000002; /* (*) displayed as ordinary underline   */
      private const byte CFU_UNDERLINEDOUBLE      = 0x00000003; /* (*) displayed as ordinary underline   */
      private const byte CFU_UNDERLINEDOTTED      = 0x00000004;
      private const byte CFU_UNDERLINEDASH      = 0x00000005;
      private const byte CFU_UNDERLINEDASHDOT      = 0x00000006;
      private const byte CFU_UNDERLINEDASHDOTDOT   = 0x00000007;
      private const byte CFU_UNDERLINEWAVE      = 0x00000008;
      private const byte CFU_UNDERLINETHICK      = 0x00000009;
      private const byte CFU_UNDERLINEHAIRLINE   = 0x0000000A; /* (*) displayed as ordinary underline   */

      #endregion

      #endregion

[Sconan]

Hallo!
Wir hatten ein ähnliches Problem - "andere" Links in einem Memo oder RTF darzustellen.

Wir haben den Umweg über html und HTMLViewer gewählt. (http://www.pbear.com/)
Event OnHotSpotClick abgefangen und fertig.
Klingt komisch - ist aber bestimmt einfacher als das RTF Gelumpe.

[Khabarakh]

Zitat von Taladan:

Und mit diesen Bereich kann ich nichts anfangen. Was soll das sein, und was macht dieser Bereich

Das sind einfach ein paar Messages und ein Struct aus der Win-API. Aber solange kein Bug enthalten ist, musst du den Code doch gar nicht verstehen . Kompiliere ihn in eine assembly und du wirst nicht einmal mehr bemerken, dass er in C# geschrieben ist.