Populating A Combobox With Times At Half Hour Intervals?

Dec 6, 2010

I need to fill a combobox with times at half an hour intervals:

12:00 am
12:30 am
1:00 am
1:30 am
all the way to 11:30 pm.

I could do it all manually, for next loop, cur hour, cur min, add 30 min, when over 60 add hour and so on....

but there has to be an easy way to do this?

View 1 Replies


ADVERTISEMENT

Windows - Timer - Service To Execute On The Half Hour And Top Of The Hour Marks

May 6, 2009

I wrote a VB.NET Windows Service, which works fine. I have only one issue with it. I want the service to execute on the half hour and top of the hour marks (e.g. 9:00, 9:30, 10:00, 10:30, 11:00, etc etc etc). I am using the following code:

Protected Overrides Sub OnStart(ByVal args() As String)
' Add code here to start your service. This method should set things
' in motion so your service can do its work.

[CODE]...

This code works, however, if the service starts at, say, 10:15, then it executes at 10:15, 10:45, 11:15, 11:45. How do I make it so it always executes on the 30 minute and top of the hour marks?

View 4 Replies

Program Runs Slowly After About An Hour And A Half Or So

Jun 29, 2011

I created a program that has 11 threads running simultaneously.Each thread runs a stopwatch and measures the amount of time that passes between the Start and Stop.There is no code between the start and stop, so most often, the result is 0 milliseconds.I noticed that INITIALLY, after a few minutes, the program would slow and the output to the RichTextBox would become disjointed.So, every two minutes, I have a timer execute and end the threads and restart them all.This seemed to help, however, after about an hour and a half, the program becomes more sluggish, evident in the stopwatches recording more instances over 0 milliseconds.Does this have to do with 'garbage collection' and is that even possible in VB .NET (I thought C only had that), or perhaps memory management?

View 1 Replies

Populating The Data-grid Multiple Times

Aug 23, 2010

I want to search data and then populate on a datagrid. I write the name and I click the button and it does work well, but then if I want to search for another name, I write the new name and when I click the button again the datagrid comes empty. No data at all. I will put my code'[code...]

View 4 Replies

Richtextbox To Take Up Half Half The Form Width?

May 23, 2012

I have 2 Richtextboxws on the form. I need for each textbox to take up half the form width and full height. also, I need those textboxes to keep the above mentioned proportions even when then the form size is changed on the screen.

View 1 Replies

Populating ComboBox That Is Connected To Another Combobox

Apr 15, 2012

Populating the combo box with the list of items from the one of the column in table from database.Based on the selection of item in the combo box, the another combobox should be populated with value corresponding to the selected item in the first combo box.[code]The problem with this code only the first row that is populate in the 2nd combo box.

View 6 Replies

VS 02/03 Populating Combobox?

Apr 4, 2012

I have a combobox which populates information from a textfile, however I was wondering if it would be possible to only populate the fourth field? each field in the text file is separated by tab (space).

For example the text file has the following information

orange yellow blue brown green
pink purple green yellow black
red purple pink black neon
green blue purple gold silver

The combobox I want to display brown yellow black gold I have the following coding in place however it shows all fields in the combobox.

[Code]...

View 2 Replies

Convert A 24 Hour Time To 12 Hour In .net As Hh:mm AM/PM?

Jun 12, 2012

So let's say I have 1400, I want to convert it into 2:00PM I tried the following:Dim convertedTime As String = DateTime.ParseExact(theTime,"HHmm", Nothing)

And it would give me this: 6/12/2012 02:00:00 PM

I do not want the date part, neither do I need the seconds. All I need is 2:00PM

View 3 Replies

Populating A ComboBox From A Dataset?

Dec 27, 2009

So im having a problem getting data from a table to display in my ComboBox

This is what i have:

' 2LT_Priority is the table name
' PriorityName and Priority_ID are Columns
Dim ds As DataSet = _2LTDataSet

[Code]....

View 5 Replies

Populating A Combobox From An Access Db?

Nov 28, 2011

What is the best way to populate a combobox from a database?I've looked at previous questions but they all seem more complex than my query.Data base table has just two columns, ItemId & ItemDiscription I just need itemId field to show in the combobox.

ie
Connect to DB
put data into dataAdapter
fill dataset from dataAdapter (sql statement)
Fill combobox from dataset

View 4 Replies

Populating A Combobox Through Datasource?

Jun 6, 2012

Private Sub UsernameEdit_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim sqlconn As New SqlConnection
sqlconn.ConnectionString = "stuff"

[code]....

The combobox just populates with "System.Data.DataRowView" I know it is some command to read the correct data out of the table, is it setting up something like:

dim i as integer
for i = 0 to CompanyNames.length-1
companyadapter.fill(companynames.rows(i)]
next

View 2 Replies

Populating Datagridview And Combobox?

Nov 2, 2010

I am using the below code to populate my combobox inside datagrid view; i got the code below from different source hoping that it will work;

Private Sub Form1_Load(ByVal sender
As Object,
ByVal e As System.EventArgs)

[code].....

View 7 Replies

Populating Textbox With Combobox?

Dec 16, 2009

I want to populate the textboxs with the access databse fields when i select the combobox.

my combobox is populating but my txtunivdetails is not being populated. I am not able to find my error.

Private Sub UiComboBox1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox1.SelectedIndexChanged
On Error Resume Next

[Code].....

View 6 Replies

Populating The Information Into A ComboBox?

Jan 24, 2011

I need to populate some information into several ComboBoxes. The infromation should be read from the table in my database. Is it possible to read the information and populate it onto a combobox without using data binding?

I tried to populate several ComboBoxes, but if I use databinding, the ComboBoxes all show the same value.Also, if I select a certain value, it also selects that row in the table, which I do not wish to do..

View 4 Replies

Populating A Datagridview Combobox Displaymember (SQL)

May 19, 2012

I have a scenario. Database name my_db

[Code]...

Am Using an Untyped Dataset to populate a datagridview from Table_3. Issue is i really need to Show the 'ColumnStudentsName' from 'Table_1' that corresponds to 'Table_3'

[Code]...

View 1 Replies

Populating DataGridView Combobox Column?

Mar 26, 2009

I have an unbound DataGridView control that displays a few columns of account data. The first column is a combobox that I fill with data from a dataset of names filtered by what's in a customer field on the form. When you click on a combo on one of the populated rows, the available names come up in the combo. But if the first click in the datagridview is on a new row's combo, various (incorrect) names appear. Only after you click on one of the populated row's comboboxes, does the correct data appear in the new row's combobox control.

I don't really understand why this is happening. I have been using the EditingControlShowing event to populate and add the combo to the new row, but it doesn't seem to be working very well. I hope someone out there has some ideas about the correct way to do this.

View 3 Replies

Copy Left Half Of A Picture And Paste It Over The Right Half Of The Picture?

Feb 28, 2010

how to copy the left half of an image, in my case its the let half of a .jpg of a whale, and "paste" it over the right half of the image. Any help would be great, here is some code that might have something to do with it, i would prefer that i could get an answer that accomplishes this by modifying this code but if not that's cool. picture should go from looking like [] to [[

Dim mb, rb As Bitmap
Dim x, y As Integer
Dim r, g, b As Integer

[code]....

View 3 Replies

Passlist Separator Program Will Not Let Read And Write Half Of A File To One File, Then The Other Half To Another File?

Nov 8, 2011

What my program does is load a file (password list), then progressively reads each line of text in the file whilst writing each line to a new file. After X amount of lines have been written, it should start writing the lines of text to a new document until the initial password list has been split into X amount of password lists. The problem I have is that after hours of tweaking, all I can get it to do is write either blank ocuments, or write all of the lines to only one file. I really need it to be able to split into multiple files, preferably at runtime rather than loading a whole text document into the program in a textbox or array then writing it to new files.Below is the source:

Imports System
Imports System.Windows.Forms
Imports System.IO

[code].....

View 11 Replies

Dynamically Populating Combobox - Defined Before Runtime?

Jan 19, 2012

I have a large form of 16 rows, and 5 columns of comboboxes. Three rows will be filled with the same information as a list of about 20 items. Two rows contain the same information of only 5 items.

[Code]...

View 3 Replies

Populating A Combobox With Multiple Properties From Object?

Apr 30, 2009

Using vb.net (vs2005), how do I populate a combo box with multiple property values from an object? Right now I'm iterating a collection of objects and adding the name property of each object to the combo box. I'd like to add multiple properties from the object to the list. For now, I'd be happy if they appeared comma separated in the list.

View 3 Replies

Populating A TxtBox Based On Combobox And A Lookup?

Feb 23, 2012

assist in the proper way to populate a value in a txtbox based on a combobox selection? I basically have a table (tblStudent) that has two fields (Range, Amt). The range records are 1-5,6-10,11-20,21-50, >50. Amt are 0 by default.

four more Tables

(tblPA,tblNY,tblNJ,tbMD) with 2 fields (pctgStud,amount) where prctgStud are

ranges (0, 1-10,11-25,26-50,51-100). Amount are 0 by default.

My form has a 5 simple comboBoxes that allows one of the ranges to be selected for each of them. I also have 5 txtBox relating to the corresponding (Amt) fields. How do I populate the textboxes with the related AMT based on the range selected from the comboBox. On a side note, I want to ultimately increment all the textbox values by one in the tables when submit is clicked.

View 10 Replies

Populating ComboBox Based On Selected Item In First One

Jan 10, 2012

I want to populate the combobox based on the selected item in the first combobox. The following code is written in vb.net 2008

Public Class Form1 Sub fillcombo()
strsql = "select * from device"
Dim cmd As New OleDb.OleDbCommand
cmd.CommandText = strsql
cmd.Connection = con
[Code] .....

For this code I am able to populate the first combobox and when I select the specific item in combobox then the second combobox shows only the first element of that item.

In MS access 2007 I have created 2 tables:
1) Contains the device ex:computer
2) Contains the device and its parts ex: cpu, monitor so here the device has duplicate values
Table names are device and parts.

View 7 Replies

Populating DataGridView ComboBox Column During Runtime?

Nov 16, 2009

I've got a window with multiple datagridviews. Each with data from a separate dataTable. All of which are part of the same DataSet. There are a couple of places where one DataTable has a field joined with the lookup dataTable from the dataset. For example a lookup table for LugSizes has a field called LugSize that is also it's primary key. Another table called Device Terminations has a field called LugSize to which the user can only select those values from the LugSize lookup table. I thought it would be as simple as using the Items.Add method for the combobox column whenever a new lookup table row was added to its own datagridview. Unfortunately, when I try to initially clear the items list, the data error event is triggered for every row.

Here's a sample of my code if it helps:

HTML

Private Sub FillLugSizeComboBox()
Try
If colDTLugSize.Items.Count > 0 Then colDTLugSize.Items.Clear()

[Code]....

View 2 Replies

Populating Textboxes Based On Combobox Selection?

Jan 8, 2010

I'm trying to populate textboxes on one form based on a selection on a combobox on another form. All data will be pulling from the same SQL table. I've got the combox to work fine to show the correct data in one of the textboxes by using the lines:

Dim connectionString As String = "Data Source=F03D3S-DEV01; Initial Catalog=dos_track;" _
& "Integrated Security=True"

[Code].....

,but not sure how to get the other textboxes to fill with the correct data (from the same SQL table row) associated with the combobox selection. I've spent SO MUCH time on this trying to figure it out, but am getting nowhere fast...

View 4 Replies

VS 2008 ComboBox Selection Populating DataGridView?

Feb 7, 2012

I have a form with a DataGridView and ComboBox, both of which are populated with data from an Excel spreadsheet, the source is unbound. My problem is in repopulating the DataGridView with data from another worksheet in the same Excel file when the user selects the corresponding value from the ComboBox. For example if they were to select January from the ComboBox then the DataGridView would load in and display the data contained on say Sheet2, selecting February would load Sheet 3 and so on. I am running Visual Studio 2008.

View 6 Replies

Combobox Selectindexchanged - Populating Combobox2 According To Selection Of Combo1

Feb 20, 2011

in my windows form i have 2 combobox. populating combobox2 according to selection of combo1. combo1 i am binding on formload.

[Code]...

View 3 Replies

Populating A Combobox With List Of Names That Are Coming From A Database

Jan 28, 2009

I am populating a combobox with a list of names that are coming from a database. I would like to get the names to show up in the combo box in alphabetical order. [code] There is also another combobox I'm populating with text from a database. (as below). However, in the database, in the column I'm reading data from, there are a few duplicate rows and then when the combobox is populated, the same text can be seen 2/3 times. What can I do or add to my existing code, that will ensure that there is no duplication shown in the combo box? [code]

View 3 Replies

Populating Textboxes Based On A Combobox Selection Using A Datareader?

Mar 26, 2012

I have a database with table "Customer" that will be the datasource for my form controls. My form has a combobox and various textboxes that need to change based on the selectedvalue in the combobox, cboCustNo. Firstly, I'm try to get the combobox to populate with the customer names on the table but have the value member of the combobox set to their customer numbers (just for ease of indexing). Based on the user's selection I'm trying to have various textboxes show the corresponding data (Address, City, Balance, etc.). The code I have so far is below:

Dim cnnDB As New Data.OleDb.OleDbConnection
Dim cmdSelect As New OleDb.OleDbCommand
Dim rdCustomer As OleDb.OleDbDataReader
Dim CustTable As New DataTable

[Code]....

View 3 Replies

VS 2010 - Populating ComboBox With Lines From Sequential File

Aug 20, 2011

I'm working on a new version of something I had created years ago in VB6. What I was doing then is populating a combobox with lines from a sequential file ("title","URL") like this:
Open "data.dat" For Input As #1
Do While Not (EOF(1))
Input #1, NameInput, URLInput
cmbEntry.AddItem NameInput
Loop

And then checking against it on a button click to load the URL associated with the selected name:
Open "data.dat" For Input As #2
Do While (cmbEntry.Text <> NameInput) And (Not (EOF(2)))
Input #2, NameInput, URLInput
Loop
[Code] .....

What I'm trying to do in Visual Basic 2010 is the same process, though I'll be including a third field ("category","title","URL") to determine which one of four different comboboxes I add the entry to. I know I need to use streamreader, but I'm not finding much in the way of documentation or examples on how to do what I'm trying to do, which is:
- Populate one of four comboboxes with the second value in each line of an external text file, based on the first value in that line
- Set a string to the third value in a line of an external text file, based on the second value of that line
How to read these values from the file.

View 3 Replies

Add One Single Item In Combobox After Populating It Form Database Table

Sep 7, 2009

i have imported names from database table into combobox..i want to add item"all" above all names..how can i just add one single item in combobox after populating it form database tabel.

View 1 Replies







Copyrights 2005-15 www.BigResource.com, All rights reserved