How to: Save a Document
- 5 minutes to read
Common Technique
To save a document in the RichEditControl, use the RichEditControl.SaveDocument Document.SaveDocument method. The RichEditControl.DocumentSaveOptions property provides access to information about the current and default file names and formats.
Call the RichEditControl.SaveDocumentAs method to invoke a Save As… dialog.
Note
Take into account the following when you save the document:
- If a document is being saved to a locked or read-only file, subscribe to the RichEditDocumentServer.UnhandledException event and set the RichEditUnhandledExceptionEventArgs.Handled property to true to prevent application failure.
- We do not recommend that you use the DocumentFormat.Undefined field as the
SaveDocumentmethod parameter. Otherwise, the document is saved with invalid format.
The RichEditControl.BeforeExport event is raised before you save a document. You can handle this event to check how the exporter formats a document. For example, the following code snippet determines whether a document contains complex formatting elements (inline pictures). If they are found, the user is prompted to save the metafile representation along with the original picture (by enabling the RtfDocumentExporterCompatibilityOptions.DuplicateObjectAsMetafile property). This technique increases the file size, but makes it possible to open this file with third-party editors which don’t support native picture format.
using DevExpress.XtraRichEdit;
using DevExpress.XtraRichEdit.Export;
using DevExpress.XtraRichEdit.Services;
private void btnSaveToFile_Click(object sender, EventArgs e) {
richEditControl1.SaveDocument("SavedDocument.rtf", DocumentFormat.Rtf);
System.IO.FileInfo fi = new System.IO.FileInfo("SavedDocument.rtf");
string msg = String.Format("The size of the file is {0:#,#} bytes.", fi.Length.ToString("#,#"));
MessageBox.Show(msg);
}
private void richEditControl1_BeforeExport(object sender, DevExpress.XtraRichEdit.BeforeExportEventArgs e) {
DocumentExportCapabilities checkDocument = richEditControl1.Document.RequiredExportCapabilities;
if((e.DocumentFormat == DocumentFormat.Rtf) && checkDocument.InlinePictures ) {
DialogResult reduceFileSize = MessageBox.Show("This document contains inline pictures.\n" +
"You can embed the same picture in two different types (original and Windows Metafile) for better compatibility" +
" although it increases the file size. By default a picture is saved in original format only.\n" +
"Enable dual picture format in a saved file?",
"Warning", MessageBoxButtons.YesNo, MessageBoxIcon.Warning);
RtfDocumentExporterOptions options = e.Options as RtfDocumentExporterOptions;
if(options != null) {
switch (reduceFileSize) {
case DialogResult.Yes:
options.Compatibility.DuplicateObjectAsMetafile = true;
break;
case System.Windows.Forms.DialogResult.No:
options.Compatibility.DuplicateObjectAsMetafile = false;
break;
}
}
}
}
public class CustomRichEditCommandFactoryService : IRichEditCommandFactoryService
{
readonly IRichEditCommandFactoryService service;
readonly RichEditControl control;
public CustomRichEditCommandFactoryService(RichEditControl control, IRichEditCommandFactoryService service)
{
DevExpress.Utils.Guard.ArgumentNotNull(control, "control");
DevExpress.Utils.Guard.ArgumentNotNull(service, "service");
this.control = control;
this.service = service;
}
public RichEditCommand CreateCommand(RichEditCommandId id)
{
if (id == RichEditCommandId.FileSaveAs)
return new CustomSaveDocumentAsCommand(control);
return service.CreateCommand(id);
}
}
public class CustomSaveDocumentAsCommand : SaveDocumentAsCommand
{
public CustomSaveDocumentAsCommand(IRichEditControl control)
: base(control) {}
protected override void ExecuteCore()
{
SaveFileDialog dialog = new SaveFileDialog
{
Filter = "Rich Text Format Files (*.rtf)|*.rtf|All Files (*.*)|*.*",
FileName = "SavedDocument.rtf",
RestoreDirectory = true,
CheckFileExists = false,
CheckPathExists = true,
OverwritePrompt = true,
DereferenceLinks = true,
ValidateNames = true,
AddExtension = false,
FilterIndex = 1
};
dialog.InitialDirectory = "C:\\Temp";
if (dialog.ShowDialog() == DialogResult.OK)
{
((RichEditControl)this.Control).SaveDocument(dialog.FileName, DocumentFormat.Rtf);
}
//base.ExecuteCore();
}
}
Custom SaveAs Command
You can implement a custom command to adjust the SaveAs dialog settings or accomplish specific tasks.
Note
Commands executed via the Bar (Ribbon) user interface can throw unhandled exceptions if a problem occurs. Consider the situation when a document is being saved to a locked or read-only file. To prevent application failure, subscribe to the RichEditControl.UnhandledException event and set the RichEditUnhandledExceptionEventArgs.Handled property to true.
A custom command inherits from the SaveDocumentAsCommand class and overrides the protected ExecuteCore method. To substitute default command with a custom command, create a new command factory - the class that implements the IRichEditCommandFactoryService interface and intercepts a call that creates a SaveDocumentAsCommand command. Register the new command factory via the IRichEditDocumentServer.ReplaceService<T> method and the RichEditControl will execute a custom command whenever you press F12 or click the Save As… button.
using DevExpress.XtraRichEdit;
using DevExpress.XtraRichEdit.Export;
using DevExpress.XtraRichEdit.Services;
public Form1()
{
InitializeComponent();
CustomRichEditCommandFactoryService commandFactory =
new CustomRichEditCommandFactoryService(richEditControl1,
richEditControl1.GetService<IRichEditCommandFactoryService>());
richEditControl1.ReplaceService<IRichEditCommandFactoryService>(commandFactory);
}
Save in Format with External Content
When saving a document in a format that defines an external content included via links (HTML format), specify a base URI to store these objects (images and style sheets). This involves RichEditControl.BeforeExport event handling and custom IUriProvider interface implementation.