Windows RichTextBox Problem

Question

Hi,

I am using windows RichText box to create RTF file for RTF input.
below is code,

RichTextBox RtfContent= new RichTextBox();
RtfContent.LoadFile(FileName,RichTextBoxStreamType.RichText);
in last getting RtfContent.RTF to write in file.

For some RTF inputs, it throws "External Component has thrown an error" in the RTFLoadFile method.

Is there any solution to resolve this issue ?

Note:

• Loading with PlainText type working fine.
• Same line of codes not giving any error in .NetFramework 4.6 but in .Net Framework 4.7 it throws error.

**

• See below input RTF Content Causing issue,

**

{\rtf1\ansi\ansicpg1252\uc1\deff0\stshfdbch0\stshfloch0\stshfhich0\stshfbi0\deflang1033\deflangfe1033{\fonttbl{\f0\froman\fcharset0\fprq2{*\panose 02020603050405020304}Times New Roman{*\falt Times New Roman};}{\f1\fswiss\fcharset0\fprq2{*\panose 020b0604020202020204}Arial{*\falt Helvetica};}{\f35\fswiss\fcharset0\fprq2{*\panose 020b0604030504040204}Tahoma;}{\f39\froman\fcharset238\fprq2 Times New Roman CE{*\falt Times New Roman};}{\f40\froman\fcharset204\fprq2 Times New Roman Cyr{*\falt Times New Roman};}{\f42\froman\fcharset161\fprq2 Times New Roman Greek{*\falt Times New Roman};}{\f43\froman\fcharset162\fprq2 Times New Roman Tur{*\falt Times New Roman};}{\f44\froman\fcharset177\fprq2 Times New Roman (Hebrew){*\falt Times New Roman};}{\f45\froman\fcharset178\fprq2 Times New Roman (Arabic){*\falt Times New Roman};}{\f46\froman\fcharset186\fprq2 Times New Roman Baltic{*\falt Times New Roman};}{\f47\froman\fcharset163\fprq2 Times New Roman (Vietnamese){*\falt Times New Roman};}{\f49\fswiss\fcharset238\fprq2 Arial CE{*\falt Helvetica};}{\f50\fswiss\fcharset204\fprq2 Arial Cyr{*\falt Helvetica};}{\f52\fswiss\fcharset161\fprq2 Arial Greek{*\falt Helvetica};}{\f53\fswiss\fcharset162\fprq2 Arial Tur{*\falt Helvetica};}{\f54\fswiss\fcharset177\fprq2 Arial (Hebrew){*\falt Helvetica};}{\f55\fswiss\fcharset178\fprq2 Arial (Arabic){*\falt Helvetica};}{\f56\fswiss\fcharset186\fprq2 Arial Baltic{*\falt Helvetica};}{\f57\fswiss\fcharset163\fprq2 Arial (Vietnamese){*\falt Helvetica};}{\f389\fswiss\fcharset238\fprq2 Tahoma CE;}{\f390\fswiss\fcharset204\fprq2 Tahoma Cyr;}{\f392\fswiss\fcharset161\fprq2 Tahoma Greek;}{\f393\fswiss\fcharset162\fprq2 Tahoma Tur;}{\f394\fswiss\fcharset177\fprq2 Tahoma (Hebrew);}{\f395\fswiss\fcharset178\fprq2 Tahoma (Arabic);}{\f396\fswiss\fcharset186\fprq2 Tahoma Baltic;}{\f397\fswiss\fcharset163\fprq2 Tahoma (Vietnamese);}{\f398\fswiss\fcharset222\fprq2 Tahoma (Thai);}}{\colortbl;\red0\green0\blue0;\red0\green0\blue255;\red0\green255\blue255;\red0\green255\blue0;\red255\green0\blue255;\red255\green0\blue0;\red255\green255\blue0;\red255\green255\blue255;\red0\green0\blue128;\red0\green128\blue128;\red0\green128\blue0;\red128\green0\blue128;\red128\green0\blue0;\red128\green128\blue0;\red128\green128\blue128;\red192\green192\blue192;\red0\green102\blue102;}{\stylesheet{\ql \li0\ri0\widctlpar\wrapdefault\aspalpha\aspnum\faauto\adjustright\rin0\lin0\itap0 \fs24\lang1033\langfe1033\cgrid\langnp1033\langfenp1033 \snext0 \styrsid9127038 Normal;}{*\cs10 \additive \ssemihidden Default Paragraph Font;}{*\ts11\tsrowd\trftsWidthB3\trpaddl108\trpaddr108\trpaddfl3\trpaddft3\trpaddfb3\trpaddfr3\tblind0\tblindtype3\tscellwidthfts0\tsvertalt\tsbrdrt\tsbrdrl\tsbrdrb\tsbrdrr\tsbrdrdgl\tsbrdrdgr\tsbrdrh\tsbrdrv \ql \li0\ri0\widctlpar\wrapdefault\aspalpha\aspnum\faauto\adjustright\rin0\lin0\itap0 \fs20\lang1024\langfe1024\cgrid\langnp1024\langfenp1024 \snext11 \ssemihidden Normal Table;}{*\cs15 \additive \ul\cf2 \sbasedon10 \styrsid9127038 Hyperlink;}{*\cs16 \additive \ul\cf12 \sbasedon10 \styrsid9127038 FollowedHyperlink;}{*\cs17 \additive \f35\fs22\expnd0\expndtw0\cf9 \sbasedon10 \ssemihidden \spersonal \scompose \styrsid9127038 EmailStyle17;}{\s18\ql \li0\ri0\sb100\sa100\sbauto1\saauto1\widctlpar\wrapdefault\aspalpha\aspnum\faauto\adjustright\rin0\lin0\itap0 \fs24\lang1033\langfe1033\cgrid\langnp1033\langfenp1033 \sbasedon0 \snext18 \styrsid9127038 Normal (Web);}{\s19\ql \li0\ri0\widctlpar\wrapdefault\aspalpha\aspnum\faauto\adjustright\rin0\lin0\itap0 \fs24\lang1033\langfe1033\cgrid\langnp1033\langfenp1033 \sbasedon0 \snext19 \styrsid9127038 E-mail Signature;}}{*\revtbl {Unknown;}}{*\pgptbl {\pgp\ipgp2\itap0\li0\ri0\sb0\sa0}{\pgp\ipgp0\itap0\li750\ri0\sb300\sa0}}{*\rsidtbl \rsid1267987\rsid4288638\rsid9127038\rsid14224636}{*\xmlnstbl {\xmlns1 urn:schemas-microsoft-com:office:smarttags}}\paperw12240\paperh15840\margl1800\margr1800\margt1440\margb1440\gutter0 \widowctrl\ftnbj\aenddoc\noxlattoyen\expshrtn\noultrlspc\dntblnsbdb\nospaceforul\formshade\horzdoc\dgmargin\dghspace180\dgvspace180\dghorigin1701\dgvorigin1984\dghshow1\dgvshow1\jexpand\doctype2\viewkind5\viewscale100\pgbrdrhead\pgbrdrfoot\splytwnine\ftnlytwnine\htmautsp\nolnhtadjtbl\useltbaln\alntblind\lytcalctblwd\lyttblrtgr\lnbrkrule\nobrkwrptbl\snaptogridincell\allowfieldendsel\wrppunct\asianbrkrule\rsidroot4288638 \fet0{*\wgrffmtfilter 013f}{*\background {\shp{*\shpinst\shpleft0\shptop0\shpright0\shpbottom0\shpfhdr0\shpbxmargin\shpbxignore\shpbymargin\shpbyignore\shpwr0\shpwrk0\shpfblwtxt1\shpz0\shplid1025{\sp{\sn shapeType}{\sv 1}}{\sp{\sn fFlipH}{\sv 0}}{\sp{\sn fFlipV}{\sv 0}}{\sp{\sn fillType}{\sv 2}}{\sp{\sn fillBlip}{\sv {\pict\picscalex-1\picscaley-1\piccropl0\piccropr0\piccropt0\piccropb0\picw56444\pich106\picwgoal32000\pichgoal60\jpegblip\bliptag-1362886559{*\blipuid aec40061680f0f0063689db7951c1a37}\bin2743 ﾘ・ JFIF H H ・ｪPhotoshop 3.0 8BIM ・ x H H ﾚ (・・・E G ( ・ H H ﾘ ( d ' ` ・ 8BIM ・ H H 8BIM ・ 8BIM
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\par Best Regards,
\par
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\par }{\f35\fs20\cf9\lang1024\langfe1024\noproof\insrsid9127038 home Airline Automation
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Answer 1

Hi viralpatel-5130,
I made a test with your code in in .NetFramework 4.6 and in in .NetFramework 4.7, They all worked fine.
Here is my test code and RTF file.

private void Form1_Load(object sender, EventArgs e)  
{  
    RichTextBox RtfContent = new RichTextBox();  
    RtfContent.LoadFile(@"C:\Users\Desktop\t1.rtf", RichTextBoxStreamType.RichText);  
    this.Controls.Add(RtfContent);  
}  

t1.rtf

And you said that Loading with PlainText type working fine. So I guess the problem is in your rtf file.
PlainText means a plain text stream that includes spaces in places of Object Linking and Embedding (OLE) objects.
RichText means a Rich Text Format (RTF) stream.
In order to find the problem more accurately, please provide your RTF file and more details.
As document said, you can also try to initialize the OpenFileDialog to look for RTF files.
Best Regards,
Daniel Zhang

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