I have a Database named CarsType.accdb there are four fields in the data base Item_Name, Item_Num, Item_Qty, Item_Cost.
I am able to get the database to display my data in VisualBasic but I am not sure how to get the total cost to appear in my label (lblTotalCost). I prefer doing it in VB versus writing in my access program. All I am wanting to do it multiply item_qty * Item_Cost How would I go about doing that?[code]...
I've created a DataSet with DataTable and I'm adding values of DataRow - Zvodp [m] in a For loop. Data type of this column is Double. When I want to use Compute method like this:
TB.Text = DataTable1.Compue("Max(Zvodp [m])", Nothing)
I get this message:
Syntax error in aggregate argument: Expecting a single column argument with possible 'Child' qualifier.
ei guys how to compute values in a datagrid column.. we have just tried some codes but it appers false anyway.. just need it badly.. i just have 30 min. :CCC
View 5 Repliesi am currently doing a project on a marking program..I have to total up the marks for question B1 to C2 and compute the sum to 'Total' column.
Table name is 'Student'
Database name is 'Database1'
I have code on log in form but it only get the latest data on username and password column on my database
Here is my code
Public Class Users
Dim MyLogIn As New myRecords
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles
[CODE]...
This is my connection:
Imports MySql.Data
Imports MySql.Data.MySqlClient
Module myconnect
[CODE]...
This is my record:
Imports System
Imports System.Data
Imports MySql.Data
Imports MySql.Data.MySqlClient
[CODE]...
Ive created one database Sql Server Compact Edition 2005, with one table ("Cliente") I know that I can created my database good, but i have a problem saving information since three textbox, in my table(With columns "Nombre" "Apellido" "Cliente". In my form there is a button save ("Guardar"). When I do click in my button appear the next message : "The column cannot contain null values. [ Column name = Nombre,Table name = Cliente ] " and happen the same with apellido and Id_Cliente. And this happen becouse my code cant save the information....
This is the code
Option Explicit On
Option Strict On
Imports System
Imports System.IO
Imports System.Data
[CODE]...
And the code for my button is:
Private Sub cmdguardar_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdguardar.Click
Dim myconnection As SqlCeConnection
Dim mycommand As SqlCeCommand
[CODE]...
how can we compute tax using the values in the database.?
View 10 RepliesCurrently i am able to compute MI (Maintainability Index) at a VB Method and VB Function Level. I would like to know how this can be rolled up to the application level?
View 3 RepliesHow can I get the total value of a row(qty) in datagridview in visual basic 2008?
View 5 RepliesI have 3 column Qty,Price and Amount and i need to compute the amount per line using DataGridView, what are the possible events I may use?
View 1 RepliesI need to round the result from compute.8/19, how can i round this result to two decimal.Is there any symbol i can use for compute function to recognize the rounding format, because not must be two decimal,sometime may one or in integer?
View 3 Replieshere what i try to get:
Table A:
Field: Name A
Field: Id_A
[Code]....
In fact i want to list in grid the table A with a column which contains a checkbox and is checked if the item is include in table B (field TableA_Id_A).
how to code the automatic compute the date. Example In Date Applied the Date today February 18, 2012 then will be automtic compute in 10 days in Date Realesed February 28, 2012.i have code for the date this is for the DateApplied: Label26.Text = Format(Now, "MMMM dd, yyyy")
View 10 RepliesMy assignment was to compute design a {Loop, Array } that user inputs grades and calculates the average, Im stuck on the part of computing avg but i
Module Module1
Sub Main()
'Declare Array called Grades with 4 Elements
[code].....
My assignment is to compute commission for a stockbroker within the following parameters: Commission for stock =< $50.00 = 0.19 base per share; for stock >$50.00 = 0.26 base per share If number of shares is =< 150 then commission rate is 1.5 * base per share. [code] Did I mention that I am an extremely new user to VB?
View 2 RepliesHow will i compute Standard Deviation in LINQ? How do i convert Average in decimal in LINQ? I'm working on the code below. I already got the Average but it's in whole value not decimal. I need a four point decimal for my Average. Help please.
Private Sub Compute_VIT_MeanSD()
Dim decAverage As Decimal
Dim msg As String = ""
[code]....
What i'm trying to do is compute whether an integer number is prime or not. The program performs this analysis for all odd numbers from 3 up to an input integer limit, for example 100. If the integer in the range 3 to limit is prime, a message stating so is printed. Otherwise, a message is printed that lists at least one other integer divisor. The output for each analyzed number consumes one line of text.
A sample output is shown below:
Limit is 100:
Number 3: is prime
Number 5: is prime
Number 7: is prime
[CODE]...
I understand I need to use loops, boolean functions, vbmath(), strings and multi-line out via concatenation. So I can put this is words how I think it should be done but not so great putting the code together
Test all integers up to the SQRT of the number (100)
limit = math.sqrt(100) + 1
Followed by 1 For statement
For c = 0 to 100 step 2?
And an If statement
If ......
result = false
i have a problem regarding my project, its a library system to be exact here the flow of the problem in the library there is a borrowing time and a returning time of books every hours that the student failed to return the book it will cost 5 pesos(philippine money)and in a day it will cost 40 pesos.. 9 am to 5 pm is the counted hours of penalty, night is not included in the computation of penalty.. my borrowing form is in datagrid view.. is it good to do this in details view how to compute in date and time format?
View 1 Repliesthis function enables you to calculate a full arithmetic calculation , as 5*(3+2)+6 , but : it's limited with (+,-,*,/) signs . is there any way to add a support for the another signs (like : !,sin,cos,tan,root,^,log and another signs) to give the user the ability to calculate a full calculation including the other signs which cannot be calculated within the compute.datatable function ?
View 2 RepliesI am using xml reader to read an xml file into a dataset and and then create some dataviews and bindingsources for binding combo and text boxes as such:
Dim folderName As String
Dim xmlFile As XmlReader
Dim ds As New DataSet()
[code]....
I don't know how to do the same thing I am trying something like:
Me.yearavgdomtxt.Text = CStr(ds.Tables("Property").Compute("AVG(DaysOnMarket)", Nothing))
No error but no result
Is there a way to use the DataTable.Compute Method with 2 or more filters, i have googled a bit and cant seem to come up with answer?
Current code
Dim Dt As Decimal = NumericUpDown1.Value
dtlist.Rows(i)("Value") = dtsold.Compute("Max(ClosePrice)", "Distance <=" & Dt & "")
[code].....
Is there a down side to using the Compute method, like this, [code] or would it be better to add the query to my datasource?
View 3 RepliesI have this code to compute average and stored the result in textbox3.[code]In label6 I want to store the result (2+3+5/3=3.33 so in label 6 will be displayed the result 3.33 and in label 7 will be displayed the result 3 because it rounds my result from label6.
View 4 RepliesI tried to follow this advice, but I still run out of memory.
[URL]
Basically, I am reading all the bytes of a 1 gb disk and I want to try and do a md5 hash on it. However, when following this example, my cryptostream gets too large a System out of memory exception.
Is there another way to do the md5 hash over some much data?
I am currently reading it into 10 million bytes arrays at a time. Can I hash the first array, and then use it as a seed for the next array, and so one, like you might do to a CRC32 calculation?
i'm going to make application but i need timer in vb.net to compute the time required to complete my application
View 4 RepliesThe program should request the person's occupation, the amount of the bill, and the percentage tip as input and pass this information to a Sub procedure to display the person and the tip. Title is gratuities, first line Person's occupation, amount of the bill:, Percentage tip: Compute Tip, and show the tip. Im not sure how to approach it properly.[code]
View 2 RepliesHow can i compute the total value of a row in datagridview in vb 2008[code]...
View 4 RepliesI found a win, loss, percentage calculator in the forums. The form has a PLACE FOR INPUT
Team Braves
WINS = 96
LOSS 66
a button Compute Percentage and a text box it should read Braves won 59.259 percent of games. The program in the forums does not work. Does any one know how to do this? The math should be wins / wins+loss * 100.
I do have the following problem extracting records from a datatable, based on date.
I am using Datatable.compute to sum the relevant rows, at least I'm trying to!
CrTot is a variable of type double
BankTrans is a datatable
dteRecDte is a datetimepicker component
CrTot = BankTrans.Compute("sum(bank_amount)",
"bank_amount > 0 And date_bank_reconciled <="
& dteRecDte.Value.Date)
doing the sum calculation on it's own works properly. I now need to check that the date of the "date_bank_reconciled" field is less than or equal to the value of the date entered in the datetimepicker "dteRecDte.Value.Date", so that only rows with a date either less than or the same as that in the datetimepciker are returned.
I have an app that contains a DataTable that I must summarize. In that table is a Status column (also the index order) and I want to write a loop in which I compute the count for each status. So I wrote my loop and tried to use the compute function of the Datatable class, but I cannot get it working due to some constraints - specifically this...
[Code]....
You can see what I am doing here is grabbing the string value of the Status column, and then trying to get a count of how many records have that Status. My ultimate goal was to cycle the Table and count each time the status changes. But the error I get has to do with where I store the Status in a String, and then issue the second parameter on the Compute function which contains a variable (sumString) and this is where Compute is crashing - and of course, I can see why - my Status is not literal and thus not in quotes.
Generally speaking, is there any way to manage this kind of thing? In my (very) old FoxPro days one would use a macro such as "Status = &sumString" and VFP would translate sumString to its literal. I have never discovered a way to do that in .NET.