Load Data Based On A Selected Month By The User ?
Jun 22, 2010
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
[CODE]...
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Apr 21, 2010
I need to populate all date for an specific month selected by the user from a combobox where I added all months name. How I can create array of any months of the year, very new coder in vb.Net.
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Mar 25, 2011
I'm trying to do the following.I want to use a gridview to load a set of associated records dynamically based upon the input of the user.I want the gridview to have a checkbox to the left of the records and allow the user to use this to select records to remove. The gridview will have pages and will be sortable using the columns.I had this working using a delete button, but when I went to using the checkbox it stopped sorting.
[Code]...
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Feb 10, 2011
Say I have a data file that was created in VB6 like this:
Dim arr As Variant
Dim unit As Integer
Dim i As Integer
unit = FreeFile
Open "SomeFile.dat" For Binary As unit
[Code]...
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Oct 26, 2011
I have a bit of a tricky scenario. It consists of some partial problems for which I have individually found solutions, but I couldn't find anything that makes it all work together smoothly.
-Upon selecting an item in a datagrid, a new page loads with the details regarding that entity.
-The entity represents a product that can have any amount of variants (such as a t-shirt's color or size)
-I dynamically add dropdownlists to this detail-page that represent these variants (there can be any amount of variants, and each variant can have any amount of different values, each value or combination or values from different variants representing a unique product entity)
-Upon selecting a different variant in a dropdown, a delegate is called that will change the session variable to the productId associated with the selected variant and a postback is fired that will reload the page with new data based on this productId
The problem: the postback is fired BEFORE the dropdownlist's (OnSelectedIndexChanged) delegate is called. Since this delegate defines the productId in the session, the new to-be-used productId isn't known at the time of postback.
Result: loading the correct data in the page is always delayed by one postback. Each time I change the selected index of any of the dropdowns, the page is loaded with data based on the session variable that the PREVIOUS OnSelectedIndexChanged delegate of the dropdown set.
I have a LoadData() method that sets the values of all textboxes, fields, labels etc. based on the productId stored in the current session. This method is called on Page_Load.
Private Property CurrentProduct As Product
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
LoadData()
[Code] .....
It seems that I haven't been completely clear on what does and doesn't apply to this scenario regarding Page Lifecycle.
1) My dropdownlists are added dynamically, which works fine on the first page_load.
2) The content of the dropdownlists is defined by what entity's details i'm loading on the page.
3) What entity's details I'm loading on the page is at first(not-postback) defined by the product I selected in a gridview in the previous page.
4) At postback, this entity is based on a sessionvariable containing the id of the entity.
5) This session variable is defined by what item in the dropdownlist I select.
6) This dropdownlist dissapears after postback since it's not defined on the page, but dynamically. So is the event.
So my guess would go towards some clientside script that stored the selected value before postback, but then I would be clueless on how to get that variable to the server since the logic that retrieves the entity is in the business logic layer which is far away from this page..
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Dec 29, 2011
When .Clear() is invoked, is the memory freed up that was allocated when all of the items were added? I need to load several lists of codes from a database depending on the import selected by the user. Each list of codes will be a List(Of String). My idea is that I will load only small strings into a List(Of String) along with a List(Of <class>) for the data I will be validating and manipulating. When I am done, I want all of the data from the Lists to be purged from memory. Will .Clear() take care of that or does the memory still remain allocated and have to be dumped by the OS once memory gets full? (And, incidentally, what causes the OS to decide which memory blocks to dump? FIFO concept?)
There are so many lists, I'm not sure if I just want them sitting in memory or not. Granted, the lists will just consist of a single string value for each code pulled from the database. So there won't be a ton of data, so maybe I could just load all the validation lists at the beginning of runtime and only worry about purging the data List since it will contain between 35-50 "fields" per record and there will be a couple thousand records each import that is run. I don't want my program to actually cause a hit in performance in the long run. I ultimately don't see a problem because I won't be running millions or even hundreds of thousands of records at once, but I just want to be sure.
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May 5, 2010
I'm developing a finance software and I want the user to enter a bill and pick the due date via month calendar. I getting it to work was the easy part, but now I only want one month calendar, for each time a user enters in a bill and picks a date.every time the user goes to pick a due date I have to call one of the several I have on screen.Here is my code that I have so far:Add due date button:
Me
The month calender:
Me
.TxtDueDate3.Text = MonthCalendar3.SelectionRange.Start.Date.ToShortDateString()Me.TxtDueDate3.Text
= MonthCalendar3.SelectionRange.End.Date.ToShortDateString()[code].....
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Mar 23, 2010
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.
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Jul 4, 2012
I have my rpg, still, first time working on it n ages, and I want each user to be able to set their own personalized picture background for the game...
each character in the game has its own dedicated folder for each file that the character has relating to it...
what I want to know how to do, is to have my game copy the loaded/chosen background image to their respective characters data folder, and have the game reload/reset the games default background image, to the one piced by he player...I am having a hard time figuring out how to do this however...I've tried a lot of different things...and nothing is working yet...
here is my example code right now:
[Code].....
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Feb 11, 2011
I have a List<Object> where Object contains Name, Month, Type, Value.
is it possible to sum all the Value based on type, and then based on month?
I am using .NET 3.0 in VB.NET I was doing withe like 4 For loops, but its taking a while to run.
For clarification, I have something like this:
Name | Month | Type | Value
-----------------------------
hello | Jan | A | 1
hello | Jan | A | 2
hello | Jan | B | 2
[Code].....
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Mar 10, 2012
I have a requirement to show genealogy diagram to user based on readily available data. Our existing database is as follows
1- Every person has unique ID
2- Relation field's has id of respective persons based on relationship like Father, Mother, Spouse etc.
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Jun 22, 2009
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?
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May 14, 2009
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.
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Jan 25, 2012
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)
[code]....
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Dec 15, 2011
Am using Visual studio 2005 with MS Access. I have a Datagridview with a date column in format 11/23/2011(Month/Date/Year).
Now i want to know how 'search criteria based on particular month and date'.
For Example if select 'Nov' as a month from combobox and click on search button, only November month details should be displayed.
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Mar 21, 2011
I have two label in webform Label1 and Label2
Label1 displays the date as 1-Apr-2011
I want to display month as April in Label2 if date in label1 is in between 1 to 30 Apr 2011.
I want to display month as May in Label2 if date in label1 is in between 1 to 30 May 2011.
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Dec 14, 2009
i have combobox named year and combobox named month and a datagridview
i use acces as datasource if i select a year in the combo and a month in combx month i would like to see the selected year and the selected month of that particular year selected in the datagridview and also on top of the datagrid and not on the bottom
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Apr 6, 2011
I am creating a project in VB.NET in which one of the reports require that the name of employees should be displayed as column names and whatever work they have done for a stated period should appear in rows below that particular column.Now as it is clear, the columns will have to be added at runtime. Am using an ODBC Data source to populate the grid. Also since a loop will have to be done to find out the work done by employees individually, so the number of rows under one column might be less or more than the rows in the next column.Is there a way to create an empty data table and then update its contents based on columns and not add data based on addition of new rows.
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Jul 25, 2010
I have created a program in Visual basic 2010, the program contains many different objects e.g. datagridview, textbox, buttons, graphs etc, which can all be modified by the user. The user can also select a file using 'SaveFileDialog'.
Is there a way to save all the properties associated with each object to this file and later load the program back to exactly the same state it was saved in, after the user has selected saved file using 'LoadFileDialog'? Preferably in binary.
I can do this the hard way in ASC11 format by interrogating objects user editable properties and saving them. I would rather not use this method as it will require a lot of code and any future program changes will require a lot of extra work.
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Aug 9, 2009
I have created a program in Visual basic 2010, the program contains many different objects e.g. datagridview, textbox, buttons, graphs etc, which can all be modified by the user. The user can also select a file using 'SaveFileDialog'.
Is there a way to save all the properties associated with each object to this file and later load the program back to exactly the same state it was saved in, after the user has selected saved file using 'LoadFileDialog'? Preferably in binary.I can do this the hard way in ASC11 format by interrogating objects user editable properties and saving them. I would rather not use this method as it will require a lot of code and any future program changes will require a lot of extra work.
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Jan 4, 2010
I,ve build an agenda within acces and now i use acces as a datasource now my question is how can i find the month of the selected year within a datagrv this my code
[Code]...
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Feb 13, 2012
your life whatever you are doing.I have a big question. Well, it's a big job for me. I tried to google and follow some tutorials frist but finally realise rom stackoverflowers.I have a one big xml file such below. I have no control over its structure as it already exists with data.
<?xml version="1.0" encoding="utf-8" ?>
<root>
<Category Cat="A">
[code]....
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Aug 2, 2010
how to load multiple dates onto a month calendar so I could see them all on it. I will need to load the dates from a database on it but if for know somebody could give me an example on how to load at least 5 dates on it that would be good start.
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Nov 1, 2010
I have a VB2005 winforms application that will loads city data from my database table. This is to ensure that the user enters the correct city spelling, in order to receive an accurate quote. Currently, there are about 150K cities that are being loaded to the dropdown listbox on page load. It takes about 30-40 seconds for that page to load. My initial thought was to allow the user to select the state first. Then load the city values. But the user has the option of going back and requesting a quote for a different city / state.
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Jul 5, 2011
I'm creating a BASIC application, and I can't figure out how to save a user selected file (FolderBrowserDialog) to a location selected in another dialog (SaveFileDialog).
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Jun 25, 2010
i'm currently using VB.net 2005 with an Oracle 10g db.1. Alert the Admin by displaying on the main page a list of users who are due for re-certification if there are any. - I've managed to do this except my date calculation for the alert is wrong. When a user is certified say on 25-06-2010, they will be up for re-certification in 25-06-2011. I need my program to start alerting the Admin a MONTH before the user is due for re-certification. So basically start the alert on 25-05-2011.Currently this is my logic in VB.
Reason = Get value in Reason field (If this field is not empty, then don't raise alert for this record)
Renewal = Get the re-certification date
Sysdate = Get current system date
[code]...
Alert the Admin via email - I've managed to create an email (stored procedure in Oracle) that contains the skeleton. I say skeleton because althought the mail executes fine, I've not managed yet to include the list of users due from the db. I created a Curser and dumped my results in there, but not sure what to do after that.
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Jun 10, 2011
program that allows the user to enter a month and a number of years. (e.g March and 10 years) The program then displays all the months of the year from the entered month in a loop that runs as many times as the number of years.(e.g March April May.....December January February March....)
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Jul 15, 2009
Here is my problem. I'm not sure I am doing this correctly but I have two arrays [ strMonths(0) = "January"] etc. for each month and another one that receives input from the user concerning the amount of rainfall for a month. [decRainfall(0) = CDec(strMonths(0))] etc. for each subscript
The app. returns total rainfall for the year, average rainfall, maximum rainfall and minimum rainfall.The max. and min. should return the number that was input by the user and the month associated with that max. and min.I have everything working except for the month string being displayed (returned) after the max., min. number in the labels.
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Nov 8, 2009
I am writting software for a touch screen (windows CE) as well as a desktop pc (windows XP)I have the software working for both, but the problem I am having is the Calendar.I need a Calendar for the current month, as well as allowing the user to go back to other months.I was going to use the control in vb.net called 'MonthCalendar' but when I add it to the form and make the control bigger (as in font) it adds to months when viewed on XP but when I copy the exe to the touch screen it only shows the 1 month like its ment to.Is there a better Calendar control I can use or does anyone know how to make it so that it only shows 1 month in the 'MonthCalendar' control?I am using VB.net 2008
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Oct 28, 2009
how to load data (Book) to text box when user just enter the book code?how to load data (student) to text box when user just enter the student id?how to write the code when user click the save button , the book quantity(Book) will reduce 1 and the all the data in textbox will save in database(Issue)the interface is like
[URL]
the database is show at
[URL]
the code is
Public Class frmIssue
Dim dt As New DataTable()
Dim rowIndex As Integer = 0
Dim rowIndex1 As Integer = 0
[code]....
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