VS 2008 Comparing Combobox To Database Field

Jan 30, 2011

I have a combobox that displays saved names from the fullname column of my database. This works fine, all the items under the fullname column are added to the combobox. However, I also have several textboxes on the same form that also need to display data from the database, from the same record. So I was wondering if this was possible:



Comparing Field Values Based On Array Data In Access 07?

Aug 11, 2009

I have a query in Access 07 that identifies the following fields:  ContractID, status, start date and end date. For each contract, I've been able to search a network share and upload its corresponding file; however I need to skip the import and write a record to a table for contracts with the same start and end date. I've included a placeholder (in bold below), but how do I make the date comparison work? Do I need to create a multi-dimensional array for that or can it be done with the code I have?

Private Sub cmdRefreshList_Click()
DoCmd.SetWarnings False
'Create an array based on the true-up contract IDs.


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Add Values From Field ( Access 2007 ) To A Combobox In VB 2008?

Mar 25, 2011

How to add values from field ( Access 2007 ) to a combobox in visual basic 2008?

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Comparing Items In A Combobox

May 30, 2009

I'm trying to compare a item i have to enter in a combo box with an item already in the box (duplicating items). I've use the contains function but i need something that is case sensitive. Here is what i have so far


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VS 2008 - Pass A Field To "AutoCompleteStringCollection" In A Combobox?

Feb 4, 2010

I am trying to write a routine to bind a combobox to a datasource (coming from a LINQ query)and at the same time populate the "autocomplete" collection of the combo box:


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.net - Display Combobox Field In Label?

May 24, 2012

I have a combobox which reads a directory and displays the file names in the combobox. What I'm trying to do is when a value is selected in the combobox I wish to display this in a label.

I have tried the following

Label1.Text = Combobox1.SelectedValue

But it doesn't seem to work.

My coding to display value in the combobox

With Combobox1
.DisplayMember = "Name"
.ValueMember = "FullName"


I have the first snippet of coding in the Combobox1_SelectedIndexChanged event.

The "FullName" works with textbox1 when i select a value in the combobox but I want to display the "Name" in label1.text

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Adding Code To A Combobox Field?

Dec 13, 2010

I am creating an application install program, but one of the main things i cannot get working is the combobox, this is a drop down list of all my applications that i have put in there. I was wondering if there was a way you could tell the combobox to look at a directory or share and list the names of files within it? So, for example i could place 5 programs inside a share or directory then when i run the program and the click the drop down combo the 5 programs are listed and then i can click and install this program. Also then if i add/remove any programs it also removes it from the combo list.

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Adding Combobox Field To Datagridview?

Sep 9, 2011

Why won't this build and populate my datagridviewcombobox?

Me.POLLINGV2_SCHEDULEDataGridView.DataSource = Me.DataSet1
Dim dgvc As New DataGridViewComboBoxColumn


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Adding Values From Field To ComboBox?

May 1, 2012

I'm using ms access 03 to fill a datagridview no problem. I have 4 fields(id, first, last, points), but I just want to fill one in a combobox I have. Here is what I'm using to fill the datagridview:

Dim con As New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:Documents and SettingsPC #6My Documentsstudent.mdb")
Dim sql As String = "Select first,last,points from student"
Dim oledbAdapter As OleDbDataAdapter
Dim ds As New DataSet
[Code] .....

How could I get a combobox to just display just one field, like idk if I'm explaining myself correctly, like a SQL statement look like this:
Dim sql As String = "Select first from student" but just for my combobox.

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Combobox In A Datagridview Single Field?

Apr 24, 2010

I am developing a new project for my daily office use using access database with vb 2005.

In this project I have one bounded datagridview and it is ready to use.

I want to alter a particular field value in the datagridview regularly. so whenever I click the rowheader that particular field should be editable with a combobox with some value, after selection of the value and leaving that particular cell it should be updated with the appropriate record in the database.

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Combobox Valuemember Is Showing Field Name Not Value

Dec 15, 2011

I can use this code to set the DisplayMember, but the ValueMemeber is always the name of the field and not the field values. I can even reverse and put the ID in the DisplayMember and it works. Not sure what I'm missing here.

strSQL =
"SELECT LGGrpMainID, LGGrpMainName FROM LGGroupMain "


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Display Combobox Field In A Label?

May 24, 2012

I have a combobox which reads a directory and displays the file names in the combobox. What I'm trying to do is when a value is selected in the combobox I wish to display this in a label.

I have tried the following

Label1.Text = Combobox1.SelectedValue
But it doesn't seem to work.

My coding to display value in the combobox

With Combobox1
.DisplayMember = "Name"
.ValueMember = "FullName"


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Syntax Of Adding Combobox To Get Field

Oct 20, 2010

On the form, the user have to pick 4 different fields from combobox and then it will show into DataGridView.[code]

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Combobox The Field Names From A Dbase File?

Jan 31, 2011

i want to input into my combobox the field names from a dbase file. this is the code i have so far:

Dim table As DataTable
Dim restrictions() As String = {Nothing, Nothing, Nothing, "COLUMN"}
Using connection As New OleDb.OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data


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Make Combobox And Textbox Be A Required Field?

May 6, 2011

I have 5 combobox and they are required. I would like the user to put input or select the combobox. If no input, msgbox comes up then he has to insert input or click on a custom cancel button i have made.

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DropdownList At Properties Level Of ComboBox - Search Field Types

Oct 28, 2009

I have a combo box on my application (working with VB.net) called CmbAttendantstatus. I have sent the dropdownstyle = dropdownlist at the Properties level of the combobox.

There are 200 field types e.g;
Current Attendant
Ever Attendant
Never Attendant etc

The issue is I can only select one from the list, fine, but I want to be able to type the first letter on the combobox and it takes me to the nearest field type rather than looking through the entire drop list. For example I want Never Attendant, I just need to type N and the drop list takes me to anything starting from N and if I add E for example any field starting with NE shows up for selection. Presently, when the dropdownlist is selected you are not allowed to type anything...

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VS 2008 Comparing The Best?

Dec 8, 2010

i have 4 listbox and i named it

1. listbox40
2. listbox20
3. listbox5


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C# - Populate ComboBox Edit Field With ValueMember But Show DisplayMember In The List?

Oct 12, 2011

I have an editable ComboBox with a validation on the Text property to make sure manually entered info is valid.EDIT: All I want to do is populate the .Text property with the ValueMember of a selection rather than the DisplayMember I also have the .Items populated with valid entries having the DisplayMember and ValueMember set.My DisplayMember is a caption along with the data, and the ValueMember is the data itself.So Items might be:

(DisplayMember, ValueMember)
"Foo - 1ab2" , "1ab2"
"Bar - 3cd4" , "3cd4"

I had a validation on the text which can also validate manual user input like "5ef6" The problem I'm having is that if the user selects an item from the combobox it populates the text field with the DisplayMember property (ex: "Foo - 1ab2") which will fail validation.I have tried to manually set the .Text property with the SelectedValue or the SelectedItem.Value on each of the three relevant combobox events to no avail.I would like that the .Text of the ComboBox get populated with the .ValueMember of the item when selected rather than the .DisplayMember

EDIT: I cannot validate by trying to extrapolate the value from the caption. I send the Text off to a service to be validated.

void FillMyCombo
KeyValuePair<string, string> listValue1 = new KeyValuePair<string, string>("Foo - 1ab2" , "1ab2")
KeyValuePair<string, string> listValue2 = new KeyValuePair<string, string>("Bar - 3cd4" , "3cd4")


The user can manually enter something like "5ef6" which will pass validation.But when they select an item from the list, rather than manually entering it, the .Text property gets filled with the caption and not the value ... so it will contain "Foo - 1ab2" and that will fail validation. I cannot change the validation method to "infer" the value from the caption. I have no control over that service. All I'm after is the displayed value EDIT: Say a user selects "Foo - 1ab2" from the dropdown list, I want the text in the box to say "1ab2" EDIT: I have also tried to set the .Text property in code but I can't seem to make it work in any of the ComboBox events. how to programmaticly set the .Text property (and make it commit!) on a selection event they will also answer this question.

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VB 2008 Loops And Comparing To 0?

Jul 5, 2010

I've had no issues with this in C++, however, in Visual Basic 2008 (not sure about 2010), when I run a Do loop of any type, and run a comparison to 0, or even 0.0, the code loops a second time.


To my knowledge it should cancel after the 5th line, since the condition is satisfied.  However it does not.  Instead it runs the loop one last time.If I put in a comparison of any number higher or lower than 0, it works as it should, and cancels properly when the 5th line is written.  So 1, -3, 0.0001, etc. works, so the problem lies with 0. 

Now I do not know that much about the debugger, but it should be mentioned I'm running express edition, and I could not find anything that lets me see how each line compares.  Nor, after an hour of searching online, could I find a single forum where this is answered (though perhaps that is due to how I worded my search). 

If someone could explain to me why the comparison does not work as it should and loops a second time when comparing to 0, or even 0.0 (one person thought it was a difference in balance being double and 0 being an integer),

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VS 2008 Comparing Files?

Feb 28, 2010

How do I check if 1 file is the same as another file? For example, lets say I have to files. Both have the same name, but different contents. How would I "compare" the files and tell if they are the same or different?

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VS 2008 Comparing Strings?

Aug 10, 2009

Hopefully this question will have an easy answer; I've tried searching for the answer myself, but I don't know what to search for (I don't know what you would call this).

Is there a way to compare a string to see if it matches more than 1 value?


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VS 2008 Comparing Times?

Jan 8, 2010

How do I tell if the current time is between two other times? ie. is it currently between 8:00 AM & 4:00 PM.

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VS 2008 Is There Another Way Of Comparing Byte?

Aug 21, 2009

I'm wondering if there is another way of comparing two byte arrays, that isn't going through each index of the array.[code]But that would give me false negatives. If I wanted the real results then I would have to add a Not.

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VS 2008 Comparing 2 File Names?

Apr 13, 2012

This is the code I have in one button and I have 2 listboxes that will be filled with the info it gets.This code should compare 1 avi file to one jpg file and see if they have the same name. If YES then it will add the avi path to one listbox. If they don't have the same name OR the .jpg doesn't exists it will add avi path to another listbox.. But currently it is adding the avi name to both listboxes.

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VS 2008 Comparing An Array With The DataColumn?

Dec 28, 2009

First of all - It`s my first post here so welcome I have a short question.I have an array with strings values, and a datacolumn with values of the same data type. The question is - what is the most efficient method to find values which are in the array, but aren`t in the datacolumn?

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VS 2008 Comparing PDFs Programatically

Jun 14, 2011

I've got a project where I'm going to have to compare some PDFs. I've checked out a few SDKs, but I was wondering if anyone else has had to tackle this and may have some suggestions?

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[2008] Comparing Two Strings If They Are Equal?

Mar 8, 2009

I have the following
Dim input As String
If e.KeyCode = Keys.Enter Then


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VS 2008 - Comparing Values Of Dropdown With String

Jul 10, 2009

I am making a app that reads options of a ini
dim config as new iniconfigsource("patch.ini")
dim test as string = config.configs("news").getstring("test")
Then I made a dropdown with options

I want my script to compare the values of the dropdown with the string readed from the ini
then uses it as selected value (the so called standard value) the one uc without clicking on the arrow if the none of the values match with the string value of the ini then it executes
dropdown1.selectedindex = 0

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VS 2008 - Comparing Variables In Private Sub With Public Class

Nov 11, 2009

I have these list of RS-232 strings declared in my public class
Public Class TouchInterface
Dim WatchTVbtnCmd As String = "rs232command1"
Dim VolUpbtnCmd As String = "rs232command2"
Dim VolDownbtnCmd As String = "rs232command3"
Dim SystemOffbtnCmd As String = "rs232command4"
Dim RadiobtnCmd As String = "rs232command5"
Dim MusicbtnCmd As String = "rs232command6"

I then have this private sub. For the sake of this thread, what I would like to do is get the name of the label that was clicked which in the code below is already done, convert it to string (not sure if this needs to be done), this is also done in the code below. Next I want to compare the labelnamestring to all the variables in the public class to find out which one it is equal to and then disply that variable which should be my rs232 string in the message box. I have also added "Cmd" to the variable names above so I also need to work out how to add the text "Cmd" to the string to properly compare.

Private Sub Musicbtn_Click_1(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles WatchTvbtn.Click, VolUpbtn.Click, VolDownbtn.Click, SystemOffbtn.Click, Radiobtn.Click, Musicbtn.Click, GardenVolUpbtn.Click, GardenVolDownbtn.Click, GardenRadiobtn.Click, GardenOffbtn.Click, GardenMusicbtn.Click, GardenMediaCenterbtn.Click
Dim labelname As Label = DirectCast(sender, Label)
[Code] .....

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VS 2008 Adding Or Comparing Faster At Binary Level?

Sep 16, 2010

I was just wondering if a computer would add two numbers together (positive) faster that comparing two numbers.

I was thinking that it would be comparison (best case) due to the fact that the 0th bits could be different right off the bat. Where as when adding, moving from bit 0 to N is mandatory for addition.

But then again a computer may add/compare differently than I am imagining.

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VS 2008 Authentication Server Fail At Comparing Strings?

Feb 14, 2010

Just wondering if anyone knows why does my authentication server fail at comparing strings? Also is there a better method of comparing strings than what im using below? User types in a textbox then sends text to server, server then checks it


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VS 2008 Comparing Picture Boxes And Textbox Information?

Jan 8, 2010

I'm trying to make a Lottery program on visual basic 2008, but there's one thing that I am stuck with.Note: My explanation may be hard to understand, so if you would rather have me send you my code and see how it works, I'm fine with that. My code is pretty long so far, so I didn't know if i should post it on here.

My program has 6 picture boxes lined up horizontally, and has one text box underneath each one. There is a play and stop button on the bottom left corner.I've altered my program to have animations for the picture boxes. Instead of having a random picture picked, I have it so that each picture box scrolls through a series of 10 numbers when the user presses play.

When the player presses stop, the picture boxes stops scrolling, and random pictures are displayed in each box. (The picture is really just a black circle with a number in it).The text boxes below the picture boxes are for the user to put numbers in. These are the numbers they select for the lottery. Now this is my predicament. Since the picture boxes decides what the winning lotto numbers are, how can I compare the numbers in the text box to the pictures?

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VS 2008 Combobox Properties - Make The Combobox Not To Be Able To Write Yourself?

May 13, 2009

I have completed my project and i have one remaining thing to settle... I want to make the combobox not to be able to write yourself. for example there are 4 options ,"A","b", "c","d".If i type w in the combo all the project is ruined!i want not to be able to type at all to prevent this...Which property should i change?

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Get The "Status" Column To Be A ComboBox Instead Of A Text Field?

Jul 15, 2011

I have a DataGridView that has my custom class called "Account" binded to it. In my custom class, there is a enum called "Status". In the DataGridView, I want the "Status" column to be a ComboBox instead of a text field, and I want the "status" Enum options to be binded to it.Below is a example of what my class and enum look like

Public Enum Status


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VS 2008 Connect Database Field To Database Field?

Feb 16, 2011

I created a local Database in VB2008 with 4 tables, the problem is that I have a textbox in one table and a combobox in other table and I want that the information that I put in textbox appear after in combobox from the other table... that's possible?

Table: Filmes ... Field: NomeTextBox
Table: Tempo de Aluguer ... Field: Nome_FilmeComboBox

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Comparing The 2 Images Without Actually Comparing Them Pixel By Pixel?

Mar 20, 2012

I have the code below on a timer( "b" is a bitmap )

Not (Clipboard.GetImage


The problem is that it raises the event even if the picture didn't change.

comparing the 2 images without actually comparing them pixel by pixel (too slow to do the job)?

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Display A MSSQL 2008 Database Field / S On A VB 2008 TextB?

Jul 20, 2010

How can I display column contents of a MS SQL Database on Text Box using VB 2008

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VS 2008 Comparing Version "strings"?

Aug 25, 2010

I cant seem to think this morning.I am trying to compare version strings. These are scraped off a website...


how do i make sure I am grabbing the highest version?right now I have it checking the length, if less than 9 .. add a zero. then remove the .'s and convert to an integer. then just check. I know thats not the best and most accurate.

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Check If A Field In A Data Table Is Null Before Creating A Textbox Bound To That Field?

Feb 24, 2010

I am building a data based application using VB 2008 an SQL Express. I need to create textboxes on my form using code, (With & End With) method. I need a simple code string that will allow the app to check if the field to wich the textbox wil be databound is Nul, If so the textbox will not be created.

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Make Gridview Checkbox Field Update Boolean Field In Database?

Feb 7, 2011

There are lots of questions about this but I've not been able to solve my problem using the answers to any of them (after many, many attempts..)

I'm working in vb.net creating an asp.net web application. I have an SqlDataSource and a GridView on my page.

I want to change the DoNotMail boolean value represented by a Gridview checkbox and automatically update in the database if the checkbox is checked from 0 (False, Will Mail) to 1 (True, Won't Mail) here is the code I used. [code]...

is it possible to do a two way sync on the entire gridview when the user hits a button so you don't have to do an update every time a row is changed? because the user might check the box and then check another box then uncheck a box and it would be a lot of updates...

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Make Database Field A DateTime Field Currently Is Set To String?

Oct 5, 2010

Dim query as String = "Select * from openquery (devbook, 'SELECT wb.arrival_time FROM web_bookings wb ')"All I need is to convert my arrival_time into a datetime field in the query

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Rename Field Headings And Change The Field Type?

Jun 28, 2010

I am trying to edit a dbf table. I would like to be able to rename field headings and change the field type, ie string or dbl, and the size of the field. is this possible to do with vb.net. I have connected to the dbf file but after that am lost on what to do.

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VS 2008 : Update Field To Add A New Value?

Feb 11, 2011

I am accepting the amount value from the user. The amount would be added to the fees if the fee is in areas, if the fee is 0, then the amount update the fee field. but when the code below is run , only the amount is updated without adding to the arrears which is the fees. Wat is wrong with this command?

update Student_Info set Fees = (Fees + '" & Me.txtamount.Text & "' ) where Class = '" & Me.cbxClass.Text & "'"

would the decode command workd in vb.net

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VS 2008 Add New Row In Database / Get -1 For ID Field

Aug 4, 2009

The table has an AppID column which just increments 1 every time a new appointment is added. That works fine. It also has an ID column that gets a unique doctor ID assigned to it so the program knows which doctor has which patient.Now, when I try to add a new row, no matter what I try, the ID field gets a -1. I've tried assigning it the doctor's ID that I'm currently browsing as well as hard coding it to be a "3" and it still shows as -1. So this means that while it does save and update the new row, it adds that -1 in the ID column and thus the program can't tell which doctor has it so it won't show in my program.[code]I'm only trying to get the ID column populated, the rest should be fine as they're all from textboxes.

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VS 2008 Add Or Update A Field?

Dec 23, 2010

I have a database in access and have connected it to vb, its connected to a login system the only problem that comes up is when i want to add or update a field which then "da.Update(ds)" gives an error.

Private Sub btnUpdate_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnUpdate.Click
Dim cb As New OleDb.OleDbCommandBuilder(da)


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