adding a search facility to NotePad

Question

Hi i am new to this so please forgive my naivety. i have been given a project to create a notepad using windows form application which i have so far managed its got all the basic functionalities like cutcopypaste load file save file etc. However one of the requirements is for the notepad to have a search facility so you can find any line of text within the document show that line of text and the line number which it is situated. so my question is is there a tool in the toolbox that i should be using to be able to do this or it just a matter of having a search button and writing the code directly to the form so when the search button is clicked a new form is displayed with a text box search bar and then test the user input to see if it exists within the text file? any tips or even a point in the right direction would be very much appreciated. Thank you

Sumit Jolly · Answer

Hi Lee Got it! Change line of code like this in FindMyText function if (indexToText >= 0) { // txtBox1.Text=txtBox1.Text.Replace(text replacetext); txtBox1.Select(indexToText text.Length); txtBox1.SelectionBackColor = System.Drawing.Color.LightBlue; returnValue = true; } twitter @sumitjolly

Sumit Jolly · Answer

This should solve: take one more text box and accept string that you want to replace. Now pass it as param and i'm using it in FindMyText to replace. However you can use separate button to replace it. public bool FindMyText(string text string replacetext) { bool returnValue = false; if (text.Length > 0) { int indexToText = txtBox1.Find(text RichTextBoxFinds.MatchCase); if (indexToText >= 0) { txtBox1.Text=txtBox1.Text.Replace(text replacetext); returnValue = true; } else { MessageBox.Show(No results for current search); } } return returnValue; } private void button1_Click_1(object sender EventArgs e) { string foundText = searchbox.Text; string replaceText = replaceBox.Text; if (txtBox1.TextLength > 0) { FindMyText(foundText replaceText); if (true) { txtBox1.Find(Text RichTextBoxFinds.MatchCase); } } }

Sumit Jolly · Answer

Have you tried to look some other controls then text box like RichTextBox OR http://www.textcontrol.com/en_US/products/dotnet/features/search-replace-client/ twitter @sumitjolly

Sumit Jolly · Answer

Hi Lee thnx for accepting my answer! to remove selection you can use following code: indexToText=0; text=; txtBox1.Select(indexToText text.Length); thnx @sumitjolly

lee croydon · Answer

Hi Sumit Jolly Thank you for your help i did not use your code in the end due to the replace text box but it did work and it helped me in finding a solution..... i ended up using the code from my last post the problem with it was this line if (searchStart > searchEnd || searchEnd == -1) it should have been if (SearchEnd > searchStart || searchStart == -1) now the search box works fine i just need to figure out how to remove the highlighted word or sentence when the user clicks in the Rich Text Box and display the line number of the highlighted text. i did use a back color grey instead of changing the text color in the end as well. once again thank you for your help :)

Sumit Jolly · Answer

Thanks Lee for accepting my solution! Looking forward for more interactions in future!

Sumit Jolly · Answer

hey Lee can you please accept the solution that worked for you so I know which is the one that solved your problem? And please send me friend request if you want to be in my friend list. I appreciate it! thnx twitter @sumitjolly

Sumit Jolly · Answer

Hi Lee I see code deviation in previous working code for startIndex and in this new implementation New one: indexOfSearchText = txtBox1.Find(txtToSearch searchStart searchEnd RichTextBoxFinds.None); Old One in post: int indexToText = txtBox1.Find(text RichTextBoxFinds.MatchCase); if you compare you're passing extra param to Find function & also you're passing different value as RichTextBoxFinds.None Look into these and I'm sure it'll solve twitter @sumitjolly

lee croydon · Answer

Hi Sumit Jolly Thank you for your reply the does work however i don't really want the second textBox (replaceText). i have come up with this from bits i have found online however it is returning the startIndex as -1 so it is not invoking the if statement. i am a little puzzled as to why. i have attached the entire code have you any theories on why it is coming back -1 instead of a plus number?using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; namespace NotePadProject { public partial class Form1 : Form { int start = 0; int indexOfSearchText = 0; public Form1() { InitializeComponent(); } private void mnuExit_Click(object sender EventArgs e) { if (MessageBox.Show(Really Exit Exit MessageBoxButtons.OKCancel) == DialogResult.OK) { Close(); } } private void mnuCut_Click(object sender EventArgs e) { txtBox1.Cut(); } private void mnuUndo_Click(object sender EventArgs e) { if (txtBox1.CanUndo == true) { txtBox1.Undo(); txtBox1.ClearUndo(); } } private void mnuCopy_Click(object sender EventArgs e) { if (txtBox1.SelectionLength > 0) { txtBox1.Copy(); } } private void mnuPaste_Click(object sender EventArgs e) { txtBox1.Paste(); Clipboard.Clear(); } private void selectAllToolStripMenuItem_Click(object sender EventArgs e) { txtBox1.SelectAll(); } private void mnuOpen_Click(object sender EventArgs e) { string chosen_File = ; openFD.InitialDirectory = C:; openFD.Title = Open a Text File; openFD.FileName = ; openFD.Filter = Text Files (.txt)|*.txt|Word Documents (.doc)|*.doc|ODF Text Document (.odt)|*.odt|All Files (*.*)|*.*; if (openFD.ShowDialog() != DialogResult.Cancel) { chosen_File = openFD.FileName; txtBox1.LoadFile(chosen_File RichTextBoxStreamType.PlainText); } } private void mnuSave_Click(object sender EventArgs e) { string saved_File = ; saveFD.InitialDirectory = C:; saveFD.Title = Save a Text File; saveFD.FileName = ; saveFD.Filter = Text Files (.txt)|*.txt|Word Documents (.doc)|*.doc|ODF Text Document (.odt)|*.odt|All Files (*.*)|*.*; if (saveFD.ShowDialog() != DialogResult.Cancel) { saved_File = saveFD.FileName; txtBox1.SaveFile(saved_File RichTextBoxStreamType.PlainText); } } private void mnuNew_Click(object sender EventArgs e) { txtBox1.Clear(); } private void button1_Click(object sender EventArgs e) { int startIndex = 0; if (searchBox.Text.Length > 0) { startIndex = FindMyText(searchBox.Text.Trim() start txtBox1.Text.Length); } if (startIndex >= 0) { txtBox1.SelectionColor = Color.Red; int endIndex = searchBox.Text.Length; txtBox1.Select(startIndex endIndex); start = startIndex + endIndex; } } public int FindMyText(string txtToSearch int searchStart int searchEnd) { if (searchStart > 0 && searchEnd > 0 && indexOfSearchText >= 0) { txtBox1.Undo(); } int returnValue = -1; if (searchStart >= 0 && indexOfSearchText >= 0) { if (searchStart > searchEnd || searchEnd == -1) { indexOfSearchText = txtBox1.Find(txtToSearch searchStart searchEnd RichTextBoxFinds.None); if (indexOfSearchText != -1) { returnValue = indexOfSearchText; } } } return returnValue; } private void searchbox_TextChanged(object sender EventArgs e) { start = 0; indexOfSearchText = 0; } } } again any input will be much appreciated and thank you for your posts so far they have been more than helpful. Regards Lee

lee croydon · Answer

thank you Sumit Jolley the code you added does work but it does not do what i had in mind i am trying to highlight the text i am looking for in the RichTextBox...... this is the code i have now which works in a sense that it returns true but it doesn't highlight the text in the RichTextBox (txtBox1)... public bool FindMyText(string text) { bool returnValue = false; if (text.Length > 0) { int indexToText = txtBox1.Find(text RichTextBoxFinds.MatchCase); if (indexToText >= 0) { returnValue = true; } else { MessageBox.Show(No results for current search); } } return returnValue; } private void searchbox_TextChanged(object sender EventArgs e) { string search = searchbox.Text; FindMyText(search); } } } as you can see this is not far off what i had to start with other than i no longer have a button for the search just a search box. However like i said above it does not highlight the text found in the RichTextBox anyone have any ideas why?

lee croydon · Answer

Thank you for the link Sumit Jolly that looks interesting however im sure i will be able to use it in this case as this is a project i am doing for a course i am currently enrolled in. as for using a RichTextBox i am currently using one in the application. public bool FindMyText(string text) { bool returnValue = false; if (text.Length > 0) { int indexToText = txtBox1.Find(text RichTextBoxFinds.MatchCase); if (indexToText >= 0) { returnValue = true; } else { MessageBox.Show(No results for current search); } } return returnValue; } private void button1_Click(object sender EventArgs e) { string foundText = searchbox.Text; if (searchbox.TextLength > 0) { FindMyText(foundText); if (true) { txtBox1.Find(Text RichTextBoxFinds.MatchCase); } } } any advise would be appreciated Regards Lee