OpenFileDialog - Set initial directory

Hi Chris,
There is a simple way to resolve this problem. You should create your own class based on the XtraRichEdit control and override the LoadDocument method. Here is some sample code:

Visual Basic
      ....  
Public Class MyRichEditControl  
    Inherits RichEditControl  
            Public Sub New()  
                MyBase.New()  
            End Sub  
            Public Overrides Sub LoadDocument()  
                Using myFileDialog As New OpenFileDialog()  
                    myFileDialog.Filter = "Text files (*.txt)|*.txt|All files (*.*)|*.*"  
                    myFileDialog.FilterIndex = 1  
                    myFileDialog.InitialDirectory = "C:\"  
                    myFileDialog.Title = "Open File"  
                    myFileDialog.CheckFileExists = False  
                    Dim result As DialogResult = myFileDialog.ShowDialog()  
                    If result = DialogResult.OK Then  
                        Me.LoadDocument(myFileDialog.FileName, DocumentFormat.PlainText)  
                    End If  
                End Using  
                'base.LoadDocument();  
            End Sub  
      ....  

In addition, you can use this approach to customize the File save dialog. Here is some sample code:

Visual Basic
      ....  
Public Class MyRichEditControl  
    Inherits RichEditControl  
            Public Sub New()  
                MyBase.New()  
            End Sub  
            Public Overrides Sub SaveDocument()  
                Using myFileDialog As New SaveFileDialog()  
                    myFileDialog.Filter = "Text files (*.txt)|*.txt|All files (*.*)|*.*"  
                    myFileDialog.FilterIndex = 1  
                    myFileDialog.InitialDirectory = "C:\"  
                    myFileDialog.CheckFileExists = False  
                    Dim result As DialogResult = myFileDialog.ShowDialog()  
                    If result = DialogResult.OK Then  
                        Me.SaveDocument(myFileDialog.FileName, DocumentFormat.PlainText)  
                    End If  
                End Using  
            End Sub  
            Public Overrides Sub SaveDocumentAs()  
                SaveDocument()  
            End Sub  
End Class  
      ....  

Try this solution, and let us know whether it helps.
Thanks,
Elliot

Updated by Yulia

The code implemented in the overridden RichEditControl.LoadDocument method is executed when the RichEditControl.LoadDocument method is called in code behind. This code does not affect the "Open document" RichEditControl's command that can be invoked from the RichEditControl Ribbon or by pressing the "Ctrl+O" shortcut. To change the behavior of the built-in RichEditControl's command, it is necessary to substitute the default command with a custom one.

This approach is demonstrated in the How to replace standard XtraRichEdit command with your own custom command Code Example. The RichEditControl exposes the IRichEditCommandFactoryService interface that enables you to substitute the default command with your own custom command. First, create a command class inherited from the XtraRichEdit.Commands.LoadDocumentCommand command. Then, override the ExecuteCore method to call the "OpenFileDialog" with the predefined settings.

As for saving the document, you can customize a default path to the output document used in the "SaveFileDialog" via the DocumentSaveOptions.CurrentFileName property.