/// <summary>
/// Remove specified words from our RichTextBox control identified by they keywords argument.
/// </summary>
/// <param name="Keywords">List of strings that identify words we want to remove from TheTextBox</param>
public void RemoveLines(List <string> Keywords)
{
string regex = String.Empty;
string NewText = String.Empty;
//1. Get the Rtf from the Textbox
if (TheTextBox.InvokeRequired)
{
// It's on a different thread, so use Invoke:
lock (m_LockObject) {
GetRtfCallback ourDelegate = new GetRtfCallback(getRtf);
NewText = (String)TheTextBox.Invoke(ourDelegate, new object[] { TheTextBox });
}
}
else
{
lock (m_LockObject) {
NewText = TheTextBox.Rtf;
}
}
//2. Perform regex magic on the text retrieved from the Textbox:
Regex MyRegex = null;
foreach (string keyword in Keywords)
{
regex = String.Format(@"{0}", keyword);
MyRegex = new Regex(regex, RegexOptions.Multiline);
NewText = MyRegex.Replace(NewText, "");
//This one would remove blank lines, but is commented away:
//NewText = Regex.Replace(NewText, @"^\s+$[\r\n]*", "", RegexOptions.Multiline);
}
//3. Put the Rtf back to the text box after the magic is done:
if (TheTextBox.InvokeRequired)
{
// It's on a different thread, so use Invoke.
lock (m_LockObject) {
SetRtfCallback ourDelegate = new SetRtfCallback(setRtf);
TheTextBox.Invoke(ourDelegate, new object[] { NewText, TheTextBox });
}
}
else
{
lock (m_LockObject) {
TheTextBox.Rtf = NewText;
TheTextBox.Refresh();
}
}
}
/// <summary>
/// Remove last line if it is identified by regex
/// </summary>
/// <param name="regex">regex to match in last line</param>
public void RemoveLastLine(string regex)
{
string OldText = String.Empty;
StringBuilder NewText = new StringBuilder();
int stepBack = 2;
string lastLine = String.Empty;
TheTextBox.HandleInvokeRequired(__TheTextBox => {
lastLine = __TheTextBox.Lines[__TheTextBox.Lines.Length - 1];
if (String.IsNullOrEmpty(lastLine))
{
lastLine = __TheTextBox.Lines[__TheTextBox.Lines.Length - 2];
stepBack = 4;
}
});
if (new Regex(regex, RegexOptions.IgnoreCase).Match(lastLine).Success)
{
//1. Get the Rtf from the Textbox
if (TheTextBox.InvokeRequired)
{
// It's on a different thread, so use Invoke:
lock (m_LockObject) {
GetRtfCallback ourDelegate = new GetRtfCallback(getRtf);
OldText = (String)TheTextBox.Invoke(ourDelegate, new object[] { TheTextBox });
}
}
else
{
lock (m_LockObject) {
OldText = TheTextBox.Rtf;
}
}
//2. Perform magic on the text retrieved from the Textbox:
int size = OldText.Split(new string[] { Environment.NewLine }, StringSplitOptions.None).Length;
for (int count = 0; count < size - stepBack; count++)
{
NewText.Append(OldText.Split(new string[] { Environment.NewLine }, StringSplitOptions.None)[count]);
if (NewText[NewText.Length - 1] != '\n' || NewText[NewText.Length - 1].ToString() != System.Environment.NewLine)
{
NewText.Append(System.Environment.NewLine);
}
}
;
//3. Put the Rtf back to the text box after the magic is done:
if (TheTextBox.InvokeRequired)
{
// It's on a different thread, so use Invoke.
lock (m_LockObject) {
SetRtfCallback ourDelegate = new SetRtfCallback(setRtf);
TheTextBox.Invoke(ourDelegate, new object[] { NewText.ToString(), TheTextBox });
}
}
else
{
lock (m_LockObject) {
TheTextBox.Rtf = NewText.ToString();
TheTextBox.Refresh();
}
}
}
}
