Check If A Newline Exists In A Multiline Textbox (windows Forms)
Feb 11, 2009
I'm trying to count characters in a textbox, which includes newline characters and tabs. How do we know if the textbox contains only newline characters? ie or if the user types in one or more characters, then a bunch of "newline" characters (CR followed by LF) and then goes back and deletes the original one or more characters leaving only the leading "newline" characters. I don't want to count the characters in textbox only if new line exists..
If String.IsNullOrEmpty(TextBox1.Text) Then
Label5.Text = 0
Else
[CODE]...
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Aug 19, 2009
I am trying to add a line of text to a TextBox component in VB.net, but I cannot figure out for the life of me how to force a new line. Right now it just adds onto what I have already, and that is not good.I have tried copying the actual linebreaks, didn't work. I tried AppendText(), didn't work.
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Feb 17, 2010
I am new to Win Forms, I have a scenario here..When User enter ID in a textbox, I want to check that value in database and get the name for that ID before submitting the Submit Button.
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Apr 22, 2011
Lets say I have a multiline textbox that I would like to have checked for say, 1-2 digits over a max of 5 lines. I found a regular expression pattern answered on another similar question on here but it was not working for me even after modifying it a number of times.
I'm currently using the following without success.
Dim textCheck As New Regex("(^d{1,2}$
?
?){0,5}", RegexOptions.Multiline)
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Jun 3, 2010
To set the text of the excel cell to an multiline text i have used "sometext" & Environment.NewLine & "sometext".but it adds an space at the end of the first line
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Mar 15, 2011
regex - regular expression to check input on multiline textbox
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Apr 20, 2009
Ok, as in my other post i asked this!!
If TextBox7.Text.Contains(ComboBox1.Text) Then
If ComboBox1.Text = "" Then
Else
[code].....
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Apr 21, 2010
i am trying to put a maximum row number of lines in a multiline textbox. What i want is to achieve something like a console, with a maximum number of rows, with the top rows to dissappear and to keep always the last i.e. 500 rows. a note: for the textbox text i use the following algorithm
dim text
textbox.text = textbox.text & vbcrlf & text
the problem is that after a certain number of rows the program starts to get a little slow. So i guess if i put a limit to the rows i will fix this.
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Apr 20, 2009
I have this [code]...
And what i am doing here is removing a peice of text from my multiline textbox (textbox7), But its not working..?
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Apr 20, 2009
We want to Replace some text from a textbox (multiline) with = the text in our combobox and we want to replace it with its new one (in a textbox)
heres our code
If TextBox7.Text.Contains(ComboBox1.Text) Then
TextBox7.Text.Replace(ComboBox1.Text, TextBox1.Text)
End If
so that says, If the textbox(multiline) contains whats in our combobox, then replace it with the text in textbox1..
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Feb 13, 2011
I have a multiline textbox which is loading from a .dat file. However, despite telling it to load all of the .dat file, it misses off the end. I it copies the first large body of text and a load of spaces that are inbetween the first and second body, but doesn't load the second body of text. Here is the code I'm using to open my file:
RichTextBox2.Text = IO.File.ReadAllText("00061530.dat")
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Jun 5, 2010
I am looking to programme a button to check if an entry from a textbox exists within a table.
This will done via a button.
how I would code the button to make it query the table?
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Apr 28, 2009
I have a panel with some controls in it (several textboxes, a slider, 2 buttons, and a small groupbox).. When I click a button, I want all of the textboxes within the panel to be readonly... So I have this code: [code] When I run it though, I get the following error:Unable to cast object of type 'System.Windows.Forms.Button' to type 'System.Windows.Forms.TextBox'.If I remove a button, it moves on to give me the same error but for a label..
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Oct 4, 2011
"TEXTBOX is not a member of SYSTEM.WINDOWS.FORMS.TEXTBOX"
Why it is that the text boxes have errors like this even they are in the tax forms..
Label13.Text = sss.Text - philhealth.Text - pagibig.Text
Label18.Text = semiSalary.Text - Label13.Text
[CODE]...
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Aug 19, 2009
I am using VB.net to create a simple winform. I have the option to save the data I input on that form. I am trying to prevent the user not to save the data if textbox10 is empty. I tried the while loop but I go into an infinite loop. The code is below. The if statement gives the error but allows the user to save.
[Code]...
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Aug 24, 2009
i know i have to use a loop to get each line of the textbox onto a newline of a textfile but i dont know how to figure out how many lines of text the user has entered into a textbox. I tryed using a try statment to loop until it errors, it seems to work sometimes but other times it only takes half of the textbox and adds it to the textfile. And if atmaweapon reads this, i tryed to make better names for variables. Here is my code,
Code:
Path = ("Meals" & ComboBox1.SelectedItem & "" & TextBox1.Text & ".txt")
File = New System.IO.StreamWriter(Path)
If ComboBox2.SelectedItem = "1" Then
[Code]....
how many line of text there are... im not so shure how good it is to run a loop tell it errors for a textfile, but its the only way i could think of.
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Aug 19, 2009
I am using a Rich TextBox in VB.NET and passing to a StringBuilder. I need to replace the New Line character from the TextBox with either a space or a comma. Problem is the standard codes for new line don't seem to be picking up this New Line character in this case. Is there a specific character used in Rich TextBoxes as the New Line?
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Apr 28, 2011
I have a multiline textbox that has wordwrap set to True I am assigning each line of the textbox to a string Lets say I typed this into the textbox without pressing enter and it just wordwrapped to the next line Visual Programming is fun it would assign "Visual Programming is fun" to the first string however, what i want it to do is assign "Visual Programming is" to the first string and "fun" to the second string.....now if i would have pressed enter after "is" then it would have done what I wanted it to do, but if i dont press enter and just let it word wrap it does not do what i want it to do...
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Jun 9, 2011
I can't seem to get input focus on a textbox when a tab page first comes up (I'm using Windows Forms, VB.NET 3.5). I have a textbox on a panel on a tab page, and I want the focus to be on the textbox when the tab page comes up. I want the user to be able to start typing immediately in the focused textbox without having to click on the textbox. I have tab stops set in the order I want and the textbox is the first tab stop. The tab stops work except that when the tab page comes up the focus is not on the textbox, i.e. the one that's first in the tab order.
In the Enter event handler of the tab page I call the Focus method of the text box, but it returns False and does nothing, no error messages. I know I can access the text box because at the same point in the code I can set the text of the text box.If it matters, the layout of the tab page is a little complicated:[URL]..I want to set the focus on TextBox1.
What's the best way to get the focus on the desired textbox? If setting focus is the best way, why is the textbox.Focus() method failing?
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Nov 2, 2009
How do I make a connection between a button and textbox when using windows form applications. In other words, if a button is clicked on, how do I assign it to read that certain textbox where the information was entered?
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Apr 5, 2012
I am creating a program that shows two random numbers on two separate labels then I have to add / subtract them and the answer should be entered in a textbox
How can I add or subtract the numbers and enter the answer on a textbox?
I am creating it in Visual Basic Windows Forms Application
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Oct 5, 2011
I've got a Windows Forms with some Textbox's and I'm trying to make a one of them which can automaticly (or if you press Enter) change letter D to today's date, to make user life easier.
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Mar 5, 2009
I'm using the following code to validate the text entered by user. It works perfectly fine. But I want to add the backspace feature so as to allow the user to delete the wrongly entered number.I have tried a couple of things and they worked but before last digit (after the decimal point) i.e. it does not allows to delete after the number has been completely entered.number is being entered in the format: 12313213.45
What shall I do?Private Sub TextBox5_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox5.KeyPress
[Code]...
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Sep 25, 2010
I was wondering if anyone could show me how to check if a tag exists?Here is the code that I am using to get the information from the xml.
Dim XmlFile As New XDocument
XmlFile = XDocument.Load(WorkingDirectory & "ToolsMediaInfoMediaInfo.xml")
Dim Manage = XmlFile...<track>
For Each XmlTag In Manage
If XmlTag.FirstAttribute.Value = "General" Then
[Code]...
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Jul 10, 2009
This is the standard way of checking if URL exists [code]....
return true; } catch (Exception ex) { return false; } But my problem is that we have to check it for around 100 URL's. It takes more then 2 minutes to check for all as it is trying to get response of all of them. Is there any way that we can check if URL exists without getting complete Response so that total response time is less.
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Mar 18, 2009
I am using vb.net 2008,how to create a misc properties for a textbox in windows forms?
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Oct 6, 2009
I have written a little helper app that mostly does various text operations on a paragraph of text. I am able to select a block of text from the Code Window and drop it onto my VB.NET apps TextBox and complete the text operation. However I am unable to drag and drop the altered text back to the VB Code window Via the DoDragDrop method.
If e.Button = MouseButtons.Left Then
Dim d As New DataObject
d.SetText(Me.TextBox3.Text)
Me.TextBox3.DoDragDrop(d, DragDropEffects.Move)
End If
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Apr 28, 2010
ERROR:Error'Value' is not a member of 'System.Windows.Forms.TextBox'.
My Code:
Private Sub TextBox2_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox2.TextChanged
If TextBox3.Value > TextBox2.Value Then
[Code].....
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Jul 20, 2011
I'm trying to iterate through each line of a multiline textbox. Something like:
For Each line In Me.txtBox1.Lines
Response.Write line.Text
Next
Is there any neat way to do this, or will I need to write a character-by-character parser and look for carriage returns?
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Feb 13, 2008
I have a multiline textbox that while a file is read in some data is echo'ed out onto the textbox. Is is possible to programatically scroll the object down to the bottom? Changing everything over to a combobox and then changing the selected index would essentially do what I want, but the user needs to select/copy a bunch of lines.
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