Im having trouble changing the value of a textbox to integer. I want the user to enter a start number in the textbox, then when the user presses the button +1 that number is incremented by one.
This is what I have and it does not work Dim TestNumber1 As Integer TestNumber1 = Integer.Parse(TestNumber.Text) TestNumber1 = TestNumber +1
does anybody know of any good Visual studio 2008 books to help me with code. I used to dabble in QBASIC and finding the changover quite difficult.
I am new to Visual Basic 2010, but I have been trying to make a line reader with an imported text document into a RichTextBox through an internet source.
I want the RichTextBox's line zero (the first line) to really be line one, but without changing the text in the TextBox to show the change. In other words, I want that change to happen in the background of the program.
I have tried... taking the text from one TextBox and putting it into another, while subtracting an integer value of onean attempt to use a timer to copy the text from one TextBox to another to read the line properly.
I have tried a couple of other things too, but most of them were much more complicated and I could not really explain what each thing did.[code]...
I have a program that is reading an Excel (xlsx) file and I am trying to take the data found in one of the cells and split it based upon the '@' symbol inside that cell. Here's an example: value in cell is "XXX @ YYY" I declare 3 strings (strOriginal, strA, strH) strOriginal is the value from the cell ("XXX @ YYY") then my code is supposed to split up the values in the Original string based upon that '@' symbol.So when my code is done, strA should = 'XXX' and strH should = 'YYY'.
Here is my code
strOriginal = dtbExcelData.Rows(0).Item(0).ToString y = strOriginal.IndexOf("@") strA = strOriginal.Substring(0, y - 1)
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For some unknown reason, the y integer (in this case, it is '4') changes to a random number (it has changed to 44, 61, 124) and causes the error "Error with Excel file: Index and length must refer to a location within the string. Parameter name: length" to occur.I understand why the error occurs (my y integer is not staying at 4)...I just don't understand why that y integer is changing numbers when it should remain as the indexof the '@' symbol. I'm looking for any suggestions on how to pull out the data after the space after the '@' symbol (the 'YYY' portion of 'XXX @ YYY'). Also sometimes the 'YYY' is only 'YY' as well.
i'm looking for a VB code to format integer into 5 digits and then after that auto increments like (00001 , 00002, 00003) And they are used in a text box field.
Scenario Example : When the user clicks on Add New Record. The empty id text box field will automatically insert a number 00001 on the textbox and if there user wants to add another record the number goes 00002 and so on.
Is there a easy way to input a string or integer into another exe's textbox for example, if i wanted to write into the textbox on the windows calculator '3'.
i am trying to make a program and i only want the user to be able to enter numbers and use the backspace this is my code so far.
Private Sub TextBox1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress Dim allowedChars As String = "0123456789"
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i have tryed adding "ascii char (08)" to the program but its not worked
I am trying to understand the do until loop when adding numbers along with a variable to a new line in a textbox, incrementing each time. My current example is very simple but only returns the first value. I require the output to be incremented automatically, so I thought a do until loop would be best.
I have a question regarding using a TextBox in second form within the same project. Currently I am using two forms. From the main form you can click a button which opens the second form. There, I want to type in an integer value into a textbox and use it for the code in my first form. Here's my
My friend and I are taking a visual basic online class. We are total beginners and are having trouble with a programming assignment. We have to create a arithmetic calculator with an enter button multiplication button and an addition button. What we can't seem to code properly is the event handler that allows us to use the enter button when we type in an integer in the textbox. This assignment is detrimental to our grade!
I am getting error on the following code Private Sub tot() Dim temp As TimeSpan = TimeSpan.Parse(wetothrs0.Text) wtothrs0.Text = temp.ToString Dim employeeCost As Integer = CInt(temp.TotalHours) wtotcost0.Text = employeeCost * hrate0.Text End Sub wtotcost0.text is a textbox employeecost is integer hrate0.text is integer that is coming from database
my puzzle have random characters. and i want the colour of the character to change when i retype it. Lets say R... i backspace and retype r but there's coulour. can i know how?
I have a visual basic .net application. It has a sql server database and a dataset for it. I have created an interface to the database (passing through my dataset) to add, delete, save etc records in a table.
The ID entry has identity specification:Yes and increment seed 1 When I add a record, instead of giving 1,2,3... as id in the textbox it produces -1,-2,-3 (Negative integers)
I'm using visual basic to code a program to help with weights and center of balance on aircrafts, as I'm my unit's new air load planner. The math isn't hard to do, it's just that much of it is trial and error, and redoing all the arithmetic over and over again until the aircraft's C/B is in acceptable limits can eat some time up. So, since i'm trying to learn programming I thought this might be a good way to use it for a real-world scenario.
I have designed a form with textboxes for numerical entry. I need to validate each textbox so the number entered is an integer, and is between 0-1000. I am struggling to find how to validate the data entry.
I'm developing a program at the moment and I'm trying to add the capability to add a texbox everytime you click a button. This is simple other than I'm trying to be efficiant as possible, so I made a sub that creates the textbox and the button calls the sub. Here is where it gets tricky I want the new textbox to move just below the previouse textbox, I'm not sure how to do this since Im only really createing one textbox over and over and having a variable name it by one. This souds confusing I know, but check out my code and it will make since. Really all I'm trying to do is change the location of a unknown textbox say since I create a textbox name textbox0 then when I hit the button again my varibale goes up by 1 which makes the new textbox, textbox1. how to I tell VB to change textbox1's location....
Code:
Public Class frmExpenses
'I made everything public because I'm runnings a test timer which are sending realtime data to some labels
I am working on a a program that uses a textbox to display data from a telescope. Normally the data is standard ASCII characters, but there is one time when the data is displayed as blocks to indicate the number of degrees to go. The textbox font is set to Sans Serif in the property box. When I show the blocks, I want to switch to Wingdings. I have searched how to change the textbox font and tried several ways found, but none of them work. I know that the textbox will handle Wingdings - I can set the font property and it displays correctly.
The most common method I have seen is: txtDisplay1.Font = New Font("Wingdings",26.0, FontStyle.Regular) ,but like all the other methods tried, the font never changes.
I want to change some text inside a textbox when a checkbox is checked. I tried many things, but none seems to work. I need that, when checkbox gets checked, the textbox value gets deleted from backwars until a dot. Then, place another predefined text immediately after this dot.
In my form there is a AXVS Flex Grid and a textbox.Firstly the textbox will not visible. When the focus will be on a particular column of the flexgrid then the textbox will be visible and the flex will be disable.The position of the text box will be at the bottom of the particular row at the first time. But when another row is inserted then i need to change the position of the textbox to the botoom of the new row and so on.
I am working on a project that I scroll from one screen to another.
A particular string I have 2 variables that can be changed. If I stay on this screen I can change either variable just as I need
however when I change to another screen then return my string is 1 digit longer and when I wish to edit this string my program fails because the string isn't the expected length.
A portion of my program follows....The Y6 is just a counter. The MA is a conditional control.
ElseIf _ Y6 = 4 _ And MA = True _
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Delete 0-27 then determine whats there "NC" or "NO" and simply change it. But again when I leave this particular screen and return my text length is no longer 29 charactors long, it is now 30 charactors.
say i have a TextBox1.Text on form1 how would i have it where i input code through the textbox and then it replaces what they put with the actual source(Form1
I'm making a C++ code editor application using VB.NET. I'd like to change the color of the keywords as the user types it. Also I'm looking for a way to highlight some lines of the code.
Is there a way to change the forecolor and backcolour of a piece of text inside a textbox or a rich textbox?
My client wanted to have a textbox in the Customer form of the application, which offers the applicable endings to a started street name. He starts to type a street name and the textbox offers a list of streets which start with the char sequence he typed into the textbox. Textboxes have the AutoCompleteCustomSource property and even though a list of common street names will be longer than it could be pre-filled on start, I could just hit a database with a query, populate an AutoCompleteStringCollection and show that to the user.
Now here's the thing: If I make the list populate on every keypress/keydown whatever, the program crashes and throws an AccessViolationException. I've found out that that's because: The control is in the middle of showing the AutoComplete list when at the same time it is being modified, resulting in the crash. When you refresh the Autocomplete List, the control is recreated with new pointers. Keyboard and mouse events (KeyPress, MouseOver, MouseLeave, MouseHover) attempt to reference the old control's pointers which are now invalid in memory causing a memory access violation to occur.
The underlying AutoComplete implementation does not allow for changing the AutoComplete candidate list object once it has been set on a window. To allow changing the list, WinForms destroys the Edit control or ComboBox and recreates it. This causes an exception if the underlying control is destroyed while the AutoComplete window is still use it. I read about this on MSDN, their resolution: Do not modify the AutoComplete candidate list dynamically during key events. I know that you can do this by creating a custom control and such, but can it be done with just pure coding wizardry?
