I am trying to calculate from a case, and it does not seem to work, and I also need to validate when no input is entered and the person presses the calculate button. my code is a follows
Public Class Question2
Dim intSal, intCount As Single
Dim intPiece, intRates, intPay As Long
[code].....
Formatting the input text to upper and lower cases e.g Start with a capital.
View 8 RepliesI only want the user to be allowed to select Thursday's (payday). So I did something like this:
Private Sub dtpStart_ValueChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles dtpStart.ValueChanged
If Not dtpStart.Value.Date.DayOfWeek = DayOfWeek.Thursday Then
[code].....
can anyone look at this and see why it doesn't work? When I test and enter a numeric value in the text box it still gives the error I have placed in the code, same if I put in a letter etc.
Private Sub valueDouble(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles txtTestscore1.TextChanged, txtTestscore2.TextChanged, txtTestscore3.TextChanged
[code].....
Entering a date with an Input Box and validating it to ensure it has been entered in form dd/mm/yy. I have a VB Macro in Excel and I want the user to enter a date in an Input Box in the format dd/mm/yy. The entry needs to be validated to ensure it is valid and if possible in dd/mm/yy format which if not would request another date is entered.
View 2 RepliesSo I'm developing a Windows Forms Application in Visual Basic 2010. The user searches for data and fetches results, updates fields and some other CRUD operations. I want to provide a user input validation. Usual stuff i.e. some fields need to be always numbers>0, others need to be non-empty in order to avoid Null access on some objects and others just need to be some fixed strings.
[Code]...
In my .NET porject, I have to run a lot of validation on 4/5 fields. This validation checks if certain fields have errors, for example: the name field is not allowed to have numbers or symbols. If all these checks are passed, I need to execute a SQL query to pull some data out of the database. I could have it with a lot of nested IFs, and run the function at the end once it passes them all, but this will translate into about 12 nested IFs, and it seems a really bulky way to do it. I have also thought about setting a boolean value after every check, and if the value is 1 then don't run the function, else do. But of course this gets overwritten by other checks that pass.
View 2 RepliesOn the page so far i have 4 text fields and a label and a button the page works up until i put the code in for the submit button then i get this error. BC30451: Name 'labelMessage' is not declared.
The code is Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
Line 9: If Page.IsValid Then
[code].....
I am writing below code for validating compulsary field account no. in form.User's requirement is set focus back on field when error comes :
If txtAccountNo = "" Then
MessageBox.Show("Account no filed can't be left empty")
txtAccountNo.SetFocus
Exit Sub
End If
It's working properly. But suppose user don't want to fill form and exiting from application.Message box keep on appearing till user enters account no.
I have been programming for alot of time. Generally i program in some languages like PHP, ASP.net, Java, JavaScript and others. In all languages i have to use alot of if else statments . Like if value= 10 then ... if i review my code then i find alot of if conditions. So i would like to minimise them but how not sure. one point was using classes somewhat minimised but still they are more... like task, cat, sec and type:
[Code]...
Private Sub cmdCalculate_Click()
Dim Run As Double
Dim Rise As Double
[Code]....
I was so happy when I discovered IsLittleEndian field in BitConverter. I thought of course it should be there and I should be able to specify whatever endian I like. Well, my happiness didn't last long. Spent some time till found out that there is no way to set the field.The field is readonly, and it is only set to true in static constructor:
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My question is: how come there is very useful piece of code that is already implemented and sitting there in the FCL, but there is no way to use it (unless you start messing with reflection of course)? Is it just because some developers didn't meet the deadline and left the job half-done? Even if so, why the code is not available, but the field is?I hope there is a good reason for this.
I want to make myself clear. I don't need a solution on how to handle big-endian values. I do have a solution. The solution is actually shown in my question.
I have a DataGridView and one column has DataGridViewCheckBoxColumn type .The datagrid loads from selected items of a listbox.I need to hide Check box cell in this grid according to the item. It means some items should not have checkbox in that cell(I have the list of those items which should not have checkbox in that cell).
View 3 RepliesThis LINQ to SQL query From g In Db.Context.Current.Groups Select g.GroupID
generates this SQL:
SELECT [t0].[GroupID] FROM [dbo].[Groups] AS [t0]But this query From g In Db.Context.Current.Groups
Select g.GroupID, g.MemberCount
[Code]...
I very much want to select only the fields I need. How can I persuade LINQ to SQL not to select all columns?
I can't remember very well the instances where my selected items has disappeared as if I did a "Reset ToolBox", the last time I remember was when I installed the Service Pack early this year. But last year I think it has been reset frequently and I find it bothersome to reselect all those items again and again.Is there any configuration that I could set so that my selected items are safeguarded, that is they won't be removed no matter what?
View 4 RepliesI'd like to select my cases from an external location.[code]I want my users, when they click a button, to download a file from my Dropbox(a .txt file). Then, the file will read all of the code, and add it to the code..So for example if in the .txt it was something like.[code]
View 3 Replieswhat exactly the difference between using cases and if statements are.
View 4 RepliesI am having trouble figuring out what I need to do in order to get the program to drop into the different cases. I am suppose to be doing a case block for this assignment. I believe everything else is good but it always outputs the first case and doesn't progress down depending on the inputs. I tried to number them case 1, case 2, etc.. Here is the code
[Code]...
I have an access table and I want to write a query that has a case in it, but it gives me an error message when running the query Error "Syntax Error missing operator in query expression"
[Code]...
Im trying to to detect what is in the string and so something for each different result but im not sure howto, here was my first idea but it obviously doesnt work as you cant use contains that way:
Select Case omg.Contains
Case "1"
MsgBox("1")
Case "2"
MsgBox("2")
End Select
I am working with cases, I'm only learning it so far, but just can't get a drop down menu to work that would change the background of a Textbox.
Private Sub cbColours_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cbColours.SelectedIndexChanged
Select Case colours
Case Is = "Red"
txtSpace.BackColor = Color.Red
[Code] .....
It isn't doing anything at all...
In the dropdown menu, it has
Red, Blue and Green one per line
When the value (e.g. Green) is clicked, it will then change the Textbox to the colour selected.
Is there a way to make a VB case statement evaluate all the cases? Similar to a java switch statement (without the break).
View 5 RepliesI'm using the following code to read values, from a parallel port. Can I check for multiple cases by using 'and'? [Code]
View 10 RepliesWhat purpose do protected or private (non-static) events in .NET really serve?It seems like any private or protected event is more easily handled via a virtual method. I can (somewhat) see the need for this in static events, but not for normal events. Have you had a use case before that clearly demonstrates a need or advantage for a non-static protected or private event?
View 5 RepliesI need some help with the input validation of my application. Attached is the code that I have written as well as a screenshot of the front end. I specifically need input validation to verify that the user selected input for cbLengthOfStay is a number between 1-10 as well as input validation to verify the user input for txtMedication, txtSurgicalCharges, txtLabFees and txtRehabilitation is a positive numerical number. Please feel free to critique my attached code. [Code]
View 2 RepliesIf my Category and Forum selection is incorrect I am sorry and feel free to move it. I'd like to have the users input in the message box that will show. For example: There is a textbox and the user puts in their name as Bob. Then the message box would be: What my main goal is, is being able to include the users input they type inside the textbox inside the message box.
View 6 RepliesI have a problem with the code, I have input the valid username and password in the form textbox to input the strings in php, but it keep displaying the messagebox that says login failed.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
MessageBox.Show("Please enter your username")
ElseIf Textbox2.Text = Nothing Then
MessageBox.Show("Please enter your password")
Else
[CODE]...
I don't really know why it keep displaying the messagebox that says it failed when I have input the valid strings in the first place.
I am writing a calculator app in VB Express 2008. I'm trying to get the app to accept numeric and operator input while ignoring all the alpha input. In other words taking input from the numeric keypad and the top of the keyboard and ignoring all the letters.
Here's the block of code I have so far:
Private Sub TextBox1_KeyDown(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles TextBox1.KeyDown
If (e.KeyCode >= Keys.D0 OrElse e.KeyCode >= Keys.NumPad0) And (e.KeyCode <= Keys.D9 OrElse e.KeyCode <= Keys.NumPad9) Then
Select Case e.KeyCode
[code]....
I can't get vb to recognize the above code it seems to skip right over it. BTW, is 'Keys.Crsel' the same as the caret '^' symbol?
On geting input into DataGridViewTextBoxColumn but the column should not accept input of data that is not integer like; 10003, 2.00, 1500.00
View 3 RepliesMy objective is to, instead of entering in the data manually into the text boxes, I want to read in a textfile. The Calculate button will contain the code to read in the file and assign it to the appropriate textboxes. Save the separate file in the \bin\Debug folder.
The text file just needs to have 3 integers on 3 separate lines.The code I posted works without and errors, but.I am having some trouble integrating the Stream Reader.
[Code]...