How to: Remove Blank Lines from a Document

• Nov 15, 2018

To delete excessive blank lines from a loaded document, execute the SubDocument.ReplaceAll with the appropriate regular expression as the search parameter. Then save the resulting document.

The following code snippet removes repetitive blank lines.

Note

A complete sample project is available at https://github.com/DevExpress-Examples/winforms-richedit-document-api-e5219

SearchAndReplace.cs

document.LoadDocument("Grimm.docx", DevExpress.XtraRichEdit.DocumentFormat.OpenXml);
string pattern = @"((?<=^)|(?<=\n))\n";
string replacementString = string.Empty;
System.Text.RegularExpressions.Regex myRegEx = 
    new System.Text.RegularExpressions.Regex(pattern);
int count = document.ReplaceAll(myRegEx, replacementString);
System.Windows.Forms.MessageBox.Show(String.Format("{0} blank lines have been removed",count));

SearchAndReplace.vb

document.LoadDocument("Grimm.docx", DevExpress.XtraRichEdit.DocumentFormat.OpenXml)
Dim pattern As String = "((?<=^)|(?<=\n))\n"
Dim replacementString As String = String.Empty
Dim myRegEx As New System.Text.RegularExpressions.Regex(pattern)
Dim count As Integer = document.ReplaceAll(myRegEx, replacementString)
System.Windows.Forms.MessageBox.Show(String.Format("{0} blank lines have been removed",count))