.net - Reverse Selecting Text Programmatically In A Richtextbox?
Mar 21, 2009
I have a form with a richtextbox and a scrollbar. I want to be able to keep appending text to the textbox without loosing my selection. I can save the selectionstart and selectionlength before I append the text and set it back and it works. The problem is when it comes to reverse selecting. The best I could do is set back the selectionstart at the right position but I have to move the mouse so it selects text again. I'm using the following functions before and after I append the text:
Private Sub StopRepaint()
Dim pt As Point
' Stop redrawing:
SendMessage(txtchat.Handle, WM_SETREDRAW, 0, pt)
[code].....
My main goal is to be able to select and copy text even when new text is being appended to the richtextbox. Anyone knows how to correctly select text in reverse OR easily fix my problem about text being deselected?
I have two RichTextBoxes in my vb.net application (rtf1 & rtf2). rtf1 is loaded with the external data. Mostly It contains para split into different sections. The paragraph is a dynamic data, hence the no. of words keep on changing. Now my question is that, I want to select a para from the cluster, copy it and paste it into rtf2.
Manually I did as, Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
[Code]....
Here only i could find the starting position and length. without knowing the ending postion, i couldnot specify the number of characters. how to select "para content goes here is a multiline" only from the [para content goes here is a multiline]?
Actually the contents of Rtf1 is in the .txt format. But I knew only
My.Computer.FileSystem.ReadAllText("xyx.txt")
so, if i can select the para in the .txt file before reading it into rtf1, it will be more useful.
i have a simple notepad application where i want a feature of selecting text which is underlined. Usually what happens is when i click a button the app reads a text file and underlines random text in the richtextbox. What i want is on the click of another button to select the text which is underlined. I thought of creating char range, regex all but not getting anywhere. I also dunno how to build a regex.
What i know is since all RTF texts are different we can choose the rtf text instead of simple text to select the underlined text. The rtf of underlined text in my application is this uli0 so manyulnonei where ul and ulnone mark the text as underlined. Now i want to select all such texts which are surrounded by uli0 and ulnonei . I thought of the following method :
1) Create another richtextbox2
2) Paste the text of richtextbox1 as rtf in richtextbox2. I mean show the text in coded rtf (like above) instead of normal rtf.
3) Use simple find to select all the text which is surrounded by ul and ulnone tags
4) process the text.
But this step is very tedious. If anyone could help me in making a simple procedure or build a regex which could process the text surrounded by those tags,
How would I use Reverse and MatchCase at the same time in RichTextBox.Find?Or if you got a page that explain how to make "Find", "Find Next" and "Replace" functions,
I have been getting some nullexceptions on the following lines of code...:
[Code]...
Its a text editor that i am working on. When a text is bolded and i have selected it, the button for bolding text becomes checked and same goes to the other ones like italic,underline and strikeout. but if I have selected a text with bold and italics and multiple ones, it gives me a "Object reference not set to an instance of an object." How could i solve this?
I know I can open the control panel item by using the following command %windir%system32SystemPropertiesPerformance.exe. However what I do not know is there a way to programmatically select the options on that control panel item? For example in a vb program I can launch that panel quietly have the program select "adjust for best performance" or select "let windows decide" Apply it and then close ?
I wanted to select the entire line/row in the RichTextBox, where currently the cursor is. How should I do it ?The code should be paste in command button 'cmdSelect'
I need to reverse a string of words without using the reverse function. This is what I have so far, BUT it only shows the last two letters. For example: if i type "John" it will only give me "ho"
Public Class frmReverse Dim original As String Dim New1 As String
[code]....
I need to this without using things we haven't seen in class.
Build a small application that fills a collection (list) with 10 sequential numbers, and then prints the collection(list) in reverse order, skipping every other member, until the entire collection has been displayed. For example, if the collection contained the numbers 1 through 10, they would print as:
10, 8, 6, 4, 2, 9, 7, 5, 3, 1 The print out should be in that order no matter what sequential numbers are in the collection (list). If it were 21 through 30, output would be 30,28,26,24,22,29,27,25,23,21 and so forth.
Note: you must use a collection - do not write down the numbers directly to produce the output. Loops should be employed but the loop control variable should be used as an index or subscript number. Your code should work even if I change the list of sequential numbers to something else. Remember that indexes count from 0 first -- the first item in a collection has index 0, the second item in a collection has index 1, and so forth.
I've got the first part of the problem, getting the numbers in the list box, done with no problem. It's the second part I am struggling with. I cannot get the numbers (I am using 1-10) from the list box to display in reverse order in an adjacent text box.[code]...
I am creating a text editor like notepad. Well its an advance type because it is a tabbed notepad type. It saves html files.
I only created tabcontrol on the design time named TabControl1. the tabpages and the richtextbox are created on the form load and when adding tabs. [code]...
I have the array dimensioned as public to the form. I populate the array on Form1_Load.When I click the button btnReversingAnArray the first time all are sorted in reverse except for Wendy and it is the last item shown. ie..(The book I am even shows an image of the list Box and their example also shows Wendy as the last item)
Richard Michelle Jay Harriet Wendy
Then I do nothing else except I click the button btnReversingAnArray again and then it displays correctly.
i am trying to automatically generate multiple text boxes on a form with the following code
Private Sub CreateTB(ByVal x As Integer) Dim y As Integer = 1 Do Until y = x
[Code]...
i need it to generate as many text boxes as the variable x states, so i used the do until loop thing. But i am stuck when it comes to naming the text boxes because obviously all the text boxes cannot share the same name. so i would like to know how to programmatically name each textbox uniquely.
I am developing a search tool for my company. I got the searching to work and the results to append to a text box. I need to be able to click on the line in the text box and then open adobe or do etc. I can't figure out how to make the text box "selectable" I guess you could call it. Is there another way to do this or am I just missing a property?
With a textbox1 how can I make it so with one click, it highlights all the text in there? I tried this with no luck. Private Sub TextBox1_GotFocus(ByVal sender As Object, ByVal e As System.EventArgs) Handles TextBox1.GotFocus TextBox1.SelectAll() End Sub
I have encountered a small issue with coding a portion of my Visual Basic program. In my program, I have a variable that contains text data. I would like to be able to select certain text in the variable and place it into a textbox.
For example, my variable is called strCallInfo.
strCallInfo contains the following value: Address: 123 Law Rd Location Info: Carbon Police Department
[Code].....
Note that the values in the textboxes are equal to values in the string variable. The only problem I am encountering is how to sort the string and place certain values into specific text boxes.
I have a program with several textboxes - some of the textboxes contain predetermined text that needs to be appended to later by the user.For example:Textbox1 contain the start of a case number as this is the same for every case number (EG: CA0000).When a user is pressing tab to cycle through the text boxes and gets to textbox1 it highlights CA0000 and the user can accidentally erase that when he types if not paying attention.Is there a way so that when the focus turns to Textbox1 it automatically sets the cursor at the end of any text in that box?
I am placing 2 of these on my form and want to do the following:
1. When the control is not Focused and the user clicks inside the control, I want to highlight all text within the control. I expect to use SelectAll() to accomplish this.
2. When the control IS Focused and the user clicks inside the control, I want standard actions to occur; i.e., the user can click-and-drag to highlight, double-click to highlight,
3. When the user leaves the control (clicks on something elsle), if the control is empty, I want to populate it with pre-defined text. If it's not empty, leave text as-is.
I'm having problems, though, with figuring out #1 and #3. I have tried Enter/Leave, GotFocus/LostFocus to no avail. With Enter/Leave, the text will highlight the first time a user enters the control, but I can't seem to get the program to think the user has "left" the control. That is, the "Enter" code will not fire again.
I also thought about using the Click event, but I don't want the SelectAll() code to fire for EVERY click in the TextBox controls.
