Runtime error, File Format is not valid in RichTextBox.LoadFile()

Runtime error, File Format is not valid in RichTextBox.LoadFile()

• TRS-Bo

  You will need to import System.IO namespace

  Your richtextbox might be named different.

  If f.Extension = ".txt" Then
  RichTextBox1.LoadFile(f.FullName, RichTextBoxStreamType.PlainText)
  Else If f.Extension = ".rtf" Then
  RichTextBox1.LoadFile(f.FullName, RichTextBoxStreamType.RichText)
  End If
  

  
  
  

• mdfq10

  If you want you can send me your project and I will have a look.

  afjohansson(at)hotmail.com
  replace (at) with @

  
  
  

• Lbrsjhold

  So it should look like this:
  
  Dim f As FileInfo = New FileInfo("c:\test.txt")
  If f.Extension = ".txt" Then
  RichTextBoxPrintCtrl1.LoadFile(f.FullName, RichTextBoxStreamType.PlainText)
  ElseIf f.Extension = ".rtf" Then
  RichTextBoxPrintCtrl1.LoadFile(f.FullName, RichTextBoxStreamType.RichText)
  End If
  
  
  
  Before form1 class is started I put Imports System.IO.FileInfo
  so that is done, but I have 1 error now...and it is in:
  Dim f As FileInfo = New FileInfo("c:\test.txt")
  The first FileInfo has an error, Type "FileInfo" is not defined...
  
  
  

• Pete Wojtkowiak

  This is what I did, I took out the .doc part, so now you can't open .doc files...So now you can only open rtf or txt...
  So now .txt works, but not rtf, so then I looked at the last link you gave me but that was for saving...so now what
  
  
  
  Thanks :)
  
  
  

• tommaso_

  Ok, thanks it works now :)
  
  
  

• Matt David

  http://msdn2.microsoft.com/en-us/3f99sst7(VS.80).aspx

  With this version of the LoadFile method, if the file being loaded is not an RTF document, an exception will occur. To load a different type of file such as an ASCII text file, use the other versions of this method that accept a value from the RichTextBoxStreamType enumeration as a parameter.

  You will need to use this method instead
  http://msdn2.microsoft.com/en-us/d76176b1(VS.80).aspx

  Depending on the file extension you will need to set the RichTextBoxStreamType to plain text or RTF
  http://msdn2.microsoft.com/en-us/system.windows.forms.richtextboxstreamtype.aspx

  
  
  

• cmtytest2

  Ok,
  but when I open a rtf that has the words testing 123 123 in it this is what comes out:
  {\rtf1\ansi\ansicpg1252\deff0\deflang1033{\fonttbl{\f0\fswiss\fcharset0 Arial;}}
  \viewkind4\uc1\pard\f0\fs20 testing 123 123\par
  }
  but when I open a .txt it comes out fine...
  
  This is the code I have:
  
      Private Sub openMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles openMenuItem.Click
  
          openDialog.Title = "Open File"
          openDialog.Filter = "Rich Text Files (*.rtf)|*.rtf|Text Files (*.txt)|*.txt|All Files (*.*)|*.*"
          openDialog.FileName = ""
          openDialog.FilterIndex = 0
  
          openDialog.InitialDirectory = "MyDocuments"
  
          openDialog.CheckFileExists = True
          openDialog.CheckPathExists = True
  
          If (openDialog.ShowDialog() = System.Windows.Forms.DialogResult.OK) And (openDialog.FileName.Length > 0) Then
  
              RichTextBoxPrintCtrl1.LoadFile(openDialog.FileName, RichTextBoxStreamType.PlainText)
  
          End If
  
      End Sub
  
  
  
  
  

• FlyingHorse

  Here is some code that works well for me in VBEE

  Dim f As FileInfo = New FileInfo("c:\test.txt")
  If f.Extension = ".txt" Then
  RichTextBox1.LoadFile(f.FullName, RichTextBoxStreamType.PlainText)
  End If

  You will need to extend it to recognize other valid formats and what RichTextBoxStreamType to use.

  
  
  

• PhilipRieck

  Dim f As FileInfo = New FileInfo("c:\test.txt")
  If f.Extension = ".txt" Then
  RichTextBox1.LoadFile(f.FullName, RichTextBoxStreamType.PlainText)
  End If
  
  That has errors in it...
  
  
  

• Feret

  i tried the same thing at my end, it is working absolutely fine at my end. there is no problem in your code.
  
  
  
  

• Kelly S

  Hi,

  Please mark reply as answer, which can help other member's if they have similar problem.
  
  Thank you,
  Bhanu.
  
  

  
  
  
• Runtime error, File Format is not valid in RichTextBox.LoadFile()