Subtracting Two Hh:mm:ss Times Only Shows 00:00:00?
Jul 15, 2011
I am trying to create a basic tracker where and person clicks on button1 to display the start time in textbox1, button2 displays the stop time in textbox2 and texbox3 displays the difference between stop / start time. Textbox3 keeps showing 00:00:00 and not the difference between textbox2 / textbox1. I am having difficultly getting the format for the final textbox. I have look at Elasped Time and Parse, but without sucess. I have displayed the code below -
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
I want to enlarge an image, possibly up to 32 times or 64 times bigger than original dimensions (so that the user can see each pixel) if possible. The following is a simple function that I have to enlarge an image.
Private Function xEnlarge(ByVal Source As Image, ByVal Rate As Double, Optional ByVal Quality As Drawing2D.InterpolationMode = Drawing2D.InterpolationMode.HighQualityBicubic) As Image
I have a project creating a calculator. I have the "add" function working but have no idea how to do subtract. My professor said once we know add we can do the rest.
I have a form with 3 txtboxes. The user has to enter their date of birth in the 3 boxes in the form
-DD in the first box -MM in the second and -YYYY in the third
I then need to get todays date and take their date of birth from todays date so that I can output to 3 labels the length of time they have been alive in years,months and days.I assume I will need to use timespan? in some way but I am not sure how , or is there perhaps a better way?
I have a DateTimePicker (dtBBDate) and a textbox(txtDBBDate) object in my form....but what i want when user change the date of dtBBDate my text box should show show the date 10 days minus from that selected date i.e. if user select 10 may text box should show me 1st may?
I have a predefine time value of we'll say 1:30 PM. Im wanting to start a process at 5 minutes till 1:30 which would be 1:25. So this is what Ive tried
Dim MyTime As System.DateTime MyTime = TimeString MyTime = MyTime.AddMinutes (-5)
i have employee startdate and enddate, i want to subtract them, then determine whether the employee is active during this period or having one day or two days off or not working after the period finish.
Me.Width is what i am having issues with. I can adjust the width to work on my system but the bar is a different amount of pixels on different versions of windows. I was wondering if there was a function that would give u the amount of pixels the side bar is. I was considering writing some code so look for a color change but people can change the color so i do not think it would work very well. Also the program allows you to draw in a picture box so that would make it hard to get it to work correctly.
I am a little new to .NET Developing, and have learned a great deal recently, but I'm stuck with something. I come from an ASP Background, I'm trying to subtract 2 variables, but they don't seem to 'see' one another.
However It doesnt seem to affect the day of the object. My question is this, when subtracting hours from the object does it subtract it from the global date? I.e make "May 7, 2011 1:00:00 AM" into "May 6, 2011 6:00:00 PM" when subtracting 7 hours or does it just affect the hours of the object?
What I am trying to find is a way to get the current time and find which list item it fits into. What I think I need to do is to first of all get the current time and then go through the list splitting each item into 2 times and seeing if the current time fits. For example: Split the item 00:00 - 00:14 to 00:00 and 00:14 and then check if the current time is more than 00:00:00 but less than 00:14:59 and if so do certain task.how to go about taking each list item and splitting it into 2 separate times so I can check between them?
Do a simple thing first... open VB.NET, then open your Immediate Window. And type the following: ? -199037.52 + 198571.0 Its a simple mathematical sum which should return the answer as -466.52, but instead it shows -466.51999999998952. My project which is mainly about financial calculations has gone all screwed up because of these two numbers. All the amounts in my project are based on Double type numbers. Since this calculation is showing a strangest kind of a result, all my program code has gone haywire.
I have built a program in where I have to add and remove items from two listboxes. Listbox1 consists of a file which I have picked up on my C:/. Within this file, are different lines of items. At the end of the item line is a figure. I have a textbox in where when someone adds the an item from listbox1 to listbox2. On clicking the add button, it will add the total which was in the file. If I add more items, it will give me a running total of the items I have added to listbox2.
Now, I'm bamboozled in how to subtract the items from listbox2 with the remove button. So that when a user wants to remove an item that they currently placed in Listbox2. On pressing remove it will subtract the running total from the item which has been removed.. Here is my code in where I add products to the textbox. I have two other text boxes which I use to have these running totals. FYI, Textbox where value is outputted is Textbox5. Textbox6 is used to refresh the data and the other textbox is named 'Total'.
Public Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click If ListBox1.SelectedIndex < 0 Then MsgBox("Please select a Batch")
I've got a form with following controls: Two Datetimepickers Two Buttons One TextBox One ComboBox The idea is adding and subtracting dates using Datetimepicker contols... I found codes for doing Dates Calculation but is'nt quit correct;for example: if i want to add 21years from today the result will be: sat 30 Aug 1930 The Adding Codes on comand button: Private Sub BTNadd_Click(ByVal sender As System.Object, ByVal e As
I'm current doing a computer course at college, one unit being event driven programming - for this I must design and program a till interface?
- One being on each form I have a virtual receipt named lstbox, and I have multiple forms! The problem is the content of each form is not transfering to the next virtual receipt on the next form e.g. drinks selection form 1 you select a tea, it adds to the virtual receipt, but when you hit the button to go to the next selection form, the content of the virtual receipt does not carry over. Could you please help me ?
- Secondly, I have a payment form on my till interface which obviously allows the user to finalise the transaction by taking payment from a customer, what would be appropriate code to use for when working out customers change e.g. If you hit a �10.00 button for customers change, and the charge of the transaction is �6.00 - I wish for an output of amount of change to go to the customer!
Note - I have a vat, subtotal and total text box for where the data displays. So whether to take away from the total text box and work out change that way, or to use the correct variables in my program such as itemcost variable, order variable etc.
Events - - Selection of item - Private Sub PictureBoxchocolatebrownies_Click(sender As System.Object, e As System.EventArgs) Handles PictureBoxchocolatebrownies.Click
I only need to subtract 08800000 from whats in bold, the rest will stay the same. The value in textbox1 will always begin with 0x0880xxxx I need to convert that to 0x00000000 so basically I need to subtract 08800000 from textbox1 and place the output in textbox2.
i am trying to make a coin toss program where you toss a coin a certain number of times then repeat it a certain number of times. the problem i have is "heads(counter2)" the word "heads" has a blue error line under it how do i sort the error out and also is all the code right
Public Class Form1 Dim tosses, repeat, heads As Integer Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
how I would go about subtracting todays date from a specified date. For example, I want a lable control to say "9 Days Left To Register" where 9 is the dates is todays date subtracted from registration date.
After my code runs for a while (i.e., 1+ hours), a picture box that was being displayed properly switches to showing a red X. The surrounding code still runs, but the image is not shown. I was intermittently having an out of memory error, but recent changes may have addressed this issue.The application is capturing a webcam image of an 8 x 16 grid which can hold different color balls. It displays the live image in picturebox1 (this works). I then grab a still from the live image, process it to see if there is a colored ball in each of the grid holes, and draw a representation of the image in picturebox2 using a grid of colored circles. As the live image changes, so does the drawn image. The drawn image is updated about 4 times a second. In each cycle I trigger a redraw of the image with a PictureBox2.Refresh.
Everything works great for a while (about an hour), but then picturebox2 gets the red X. The code keeps running without throwing an error. The live image still works.Recently I was getting an OutOfMemory error (again after an hour), but memory usage should not be growing in the code, and I have 8 GB installed. To address this issue I
1) forced Garbage Collection every 30 cycles (this does not seem to help, but I left this in the code.)
2) Inserted a Picturebox2.dispose before the Picturebox2.Refresh, but the Dispose took the picturebox off my form. I removed the .Dispose.
3) Moved declaration of variables out of loops to top of subroutines. (that seemed to get rid of the OutOfMemory problem.)
4) Inserted various try ... catch statements, but the code does not throw an error when redrawing the image, so this did not help.
I have a DateTimePicker in my form. When I set a message box to force user not to chose a date grater than today two message boxes shows up one after another. Below is my code -
Public Class frmLargestSmallest 'Declare public variables Public intInput As Integer Public intArray(9) As Integer
[code]....
I am trying to make an application where the user inputs 10 numbers in an array. The application then displays the highest and lowest values of the array. My code so far just display zero as the result.
