I have to generate a series of random numbers, say 100, within range of -1 and 1 and scale them by a value, say square root of 2. After which I take those 100 values and their sum = 0. Then scale that sum by another value. Check the code below to see what I mean.
I have a dictionary that has strings variables as keys and a List collection of doubles as values.
Dim CellAddressContainer As New Dictionary(Of String, List(Of Double)) Dim Results As New List(Of Double) Within a loop I populate the Results variable as follows:
I have an application where a payment needs to be made on the same day of each month.
So if the day of the month is the 7th. Then I need to take today's date and if it's before the 7th display the 7th of the current month. if the date is after the 7th then i need to display the 7th of the next month.
I changed the date of datetimepicker format to yyyy-mm-dd in custom format...but it displays 2009-00-22...the month part is not showing the month of the exact month..how to change the format of the date?
I guess this is really a Visual Basic question, but I am trying to implement a choice of Strings statements based upon the month.
example: I am making a monthly free drawing, and I have made a SQL db table that has the months as the primary, then the prizes. I want to be able in VB to get the current date (which I can do) and make 12 IF statements that are the Months so that the proper data is pulled from the table.
IF CurrentDateTime.Month = 1 then SelectStatement = "SELECT FirstPrize, SecondPrize, ThirdPrize FROM MonthlyDrawing WHERE Month = January" and so on
So if I know how to get the current datetime, how do i access the month part and apply it? AnnualCountDownTime.Text = DateTime.Now.ToString("D" This is what I currently use to display the time.
I have a vb .NET 2005 form that needs to load data based on a selected month by the user. Because there is a large amount of data in the table (60k+ records per month) it is taking the query a long time to pull the dataset back and populate the form. how I can decrease the overhead associated with querying a large dataset to populate a base form?
Note, I have created an identity key on the main table but haven't yet indexed any other fields (Though I could use some suggestions on how I should index).
See the following example of the Stored Proc that is run before my .net form is launched:
Dim cmd2 As New SqlCommand Dim ConnectionString As String Dim TheDatabase As System.Data.SqlClient.SqlConnection
I have combobox for year and combobox for month concatenated to make the date format "2012-01" My db field is RecordDate and is smallDateTime In my select statement im trying to use the left function to find match my concatenated string to the RecordDate field.Here is my code, hopefully someone can help me. Currently im getting the error "Conversion failed when converting date and/or time from character string."
Dim newRecordDate As String = (CStr(ComboBox2.SelectedValue)) & "-" & val1 Dim val10 As String = CStr(Convert.ToDateTime(newRecordDate)) Dim val21 As String = Microsoft.VisualBasic.Right(val10, 7) MsgBox(val10)
I've got the hang of using dates now, but I haven't learned how to test multiple results of a query. I can return a value from a query, but I'm unsure how to return many without putting them into a data grid view or an object on the form. (In Visual Basic)I have to check when a particular investment needs to be bought or sold, there will be more than one in almost every case. I've got the function to find out the interval between the months, checking if the asset is bought or sold in month x, but I'm unsure how to test it against multiple assets at once - nor do I know the best way to do so.
The exception message I am receiving is this... "Year, Month, and Day parameters describe an un-representable DateTime."
Now I've traced my values being passed and everything is correct. Values loops through 1 to 12 but still I continue to receive an exception. Only way I can avoid this is by throwing a Try, Catch statement around where I'm passing over the value.
Here's my code..
001 Dim Calendar(11) As AppointmentBookControl.AppointmentBookControlMonthlyOverviewCalendarControl 002
[Code]....
Line '011 .Month = i+1' is where the problem is located. The values for (i+1) maintain within the bounds of 1 through 12..
Not sure exactly where to begin with this one. i have a screenshot that would make this easier to ask, but I can't figure out how to post it here.
[Code]...
How can I apply/combine both of these so that it will figure the datediff for each row (on a datagridview), figure the appropiate case and then update each annual leave row in the database?
[code]If I wanted to get Part Name for multiple PartIDs from OrderDetails, how would I go about doing this? Would I use two DataTables? I'm confused as I cannot see an efficient way to do this. The only thing that I can think of is to create a DataTable with SQL:[code]and then maybe use a For loop to take each PartID, create another DataTable to find the PartName for that and then give this to a variable. There could be up to 10 PartIDs to search through and I don't want to have variables such as PartID1 PartID2 etc. [code]
Currently i have a ReturnSystemDate in a module, so that whenever i need the current date and time i call this method, however my data is saving as in 1 format and displaying in another. I have my variables set up as dateTime to store the current date and time, when calling System.dateTime.now.toString() i get 11/08/2010 Time, however when casting to Date as in CDATE() i get 08/11/2010 time. How can i stop this?
I want my game to tick over month by month at a set interval. I would use the timer control to get the interval. But how can I pause it? Say if one "month" is 5 minutes in my game and user hits pause. I would disable the timer but then when they unpause the game the timer would start from 0 again. This would make a "month" 9 minutes if a user paused the game in the 4th minute.
am trying to calculate the values in rows in column 6 based on values of column 5. Bellow is the the code I am using I get a run time error about the string not formatted properly
I have one text box that contains a value for the "Start Time" and another text box that contains a value for the "End Time."Both of the values are expressed in a format for military time (i.e. 1200, 1300, 1430, etc.).When the "End Time" text box loses focus, I would like the "Elasped Time" (expressed in minutes) to appear in a third text box.Seems easy enough...right?Well the problem I'm having is since the first two numbers in military time are base 24 and the last two numbers are base 60, a standard calculation subtracting the "End Time" from the "Start Time" does not yield an accurate result.
I have a monthly forecast showing expense accounts by cost centre so columns headings look like: Cost Centre, Account Number, Jan, Feb, Mar etc
Using VBA code to automate the process, I need to calculate the total for each month of each account number where the 2 left characters of the cost centre are the same. I have a formula which will calculate this (for one cost centre grouping/account) which looks like this:
I am not sure whether there is a more efficient way than using a formula like that (at the moment this would be used for 12 months on about 6 cost centre groupings with about 500 accounts each - though this would vary). Its not massive, but could be slow to calculate. I don't think the subtotals command is powerful enough, and I haven't used arrays for a long time (especially for what would appear to need a dynamic, mulch-dimensional array).
I'm trying to load several grids based on the Type values in my xml file. For example my xml file is in the following format:[code]How do I accomplish this when in the load event of my windows form?
I have a little challenge. I have a report that I declared a parameter called Department that has default values like this: [Code] The problem is that when I test this (with CR10 or on web), and I select multiple values, the thing does not show the values for the multiple values. It only works when I select a single department. What should I do?
Given the following XML, I would like to return all eventtitles where the eventtype id = 23. My current query only looks at the first eventtype, so returns the wrong result.
I am coding a lottery number generator for a homework assignment. My project needs to have functions that return random values based on a range given. The first function I am coding is for a pick 3 lottery game.The function should return three random numbers between 1 and 9. I have coded the function but it only returns one number. When the debugger runs it says my function does not return a value on all codepaths.
i have a combo box with grade A to F in it and at the combo-box textchange event it sholud add the value of each letter to and store it in a textbox.This is because i am adding all the grades of a student into a datagrid and i want all the 8 different grades to appear in the grid but it should some only the first selected six out of the eight...I am using this code but it is not stop when the loop counter is six?
Private Sub cmbgrade_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmbgrade.SelectedIndexChanged If Me.cmbgrade.Text = "A" Then
[code]....
So with this code any time the user selects any of the Letters it should at it value to a tatal aggregrate till it add six different letters since i want to calculate for the grade of best six...example if user picks A A A A A A it should some up to six in the textbox and after that it should stop summing and add to the datagrid.that datagrid will have all eigth grades in its column but the system must add only six of them?
How can I sum up listbox value but the value I want to sum up is the one i multiplied. The q variable. look at my code. I want the sum of all Q variable in the textbox.Disregard the variables declared because I was trying to get some experiment but failed so some previously variables used left ,I did not clean up my variables.[code]
I want to be able to have a case for each data system data type. Obviousely the code below doesnt work but it should make it easier to understand my question.
This is my first web-based application using VB 2008. I had no idea where to start so I just chose the 'Wpf Browser Application' and started adding the controls on the form and naming them the same as I would do with a normal non-web-based vb app. I ran the XBAB file under bin/debug using IE and the form showed up but I couldn't enter text or anything even though the textbox was set to enabled?
However the items in the list that the listbox is bound to are not all String types. Some are DateTime and a few are Integers. I would like to have a datetimepicker displayed instead of a textbox for the DateTime types. How can I make this happen.To clarify some points the list is populated at runtime using reflection so I don't know which fields are what types ahead of time.
