VS 2010 Obtaining "ADODB.InternalField" While Populating Combobox?
Apr 14, 2011I'm using the following
[code]...
But the result is always the same
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Unable To Cast Object Of Type 'ADODB.InternalField' To Type 'System.String
Apr 19, 2010I had write code (just for learning), the codes :
dim Temp as string
Temp = Recordset("
Table_Field")
but, when I start Debugging the error messages "Unable to cast object of type 'ADODB.InternalField' to type 'System.String"
VS 2010 - Populating ComboBox With Lines From Sequential File
Aug 20, 2011I'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.
Populating ComboBox That Is Connected To Another Combobox
Apr 15, 2012Populating 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 RepliesMethod Not Found: 'ADODB.PositionEnum ADODB._Recordset.get_AbsolutePosition()'?
Jul 26, 2011I have something strange occuring. The following code works 100% when run in VB2008 Express.When compiled and run onthe same system, it generates the above message.The codebasically opens a Access DB and loops thru the db There is a progress bar (also tried a simplelabel) to display progress using AbsolutePosition.
dbInUse.Open("Provider=Microsoft.ACE.OLEDB.12.0; Data Source=C:SCDBv4DataSCDBData.mdb")
rsInUse.Open(OpenCommandSQL, dbInUse, ADODB.CursorTypeEnum.adOpenKeyset, ADODB.LockTypeEnum.adLockOptimistic)
[code]......
VS 02/03 Populating Combobox?
Apr 4, 2012I 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]...
Obtaining Name/value Pair Of Enumeration With LINQ [VB 2010]?
Jul 23, 2009I'm trying to obtain name/value pair of enumeration typed into text box with LINQ. It's OK with name, but when LINQ reaches values, it throws error: "Conversion from string "Black" to type 'Integer' is not valid". I have read that if I want to obtain a value, then I gotta use conversion function.
Here's code (button's Click event):
Private Sub GetEnums(ByVal sender As Object, ByVal e As RoutedEventArgs)
lstEnums.Items.Clear()
Dim typeName = Type.GetType(txtEnum.Text)
Dim enums = From en In typeName.GetEnumNames
[code].....
Populating A ComboBox From A Dataset?
Dec 27, 2009So 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]....
Populating A Combobox From An Access Db?
Nov 28, 2011What 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
Populating A Combobox Through Datasource?
Jun 6, 2012Private 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
Populating Datagridview And Combobox?
Nov 2, 2010I 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].....
Populating Textbox With Combobox?
Dec 16, 2009I 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].....
Populating The Information Into A ComboBox?
Jan 24, 2011I 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..
Populating A Datagridview Combobox Displaymember (SQL)
May 19, 2012I 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]...
Populating DataGridView Combobox Column?
Mar 26, 2009I 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.
VB 2010 Obtaining Data From Text File To SQL Server Database?
Jun 23, 2011im trying to make a project that obtain data from a text file and place records into a SQL server DB (.mdf).
basically i ve created my database, its ready but the thing is i dont know how to retrieve data from text file and put the records into DB
Dynamically Populating Combobox - Defined Before Runtime?
Jan 19, 2012I 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]...
Populating A Combobox With Multiple Properties From Object?
Apr 30, 2009Using 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 RepliesPopulating A TxtBox Based On Combobox And A Lookup?
Feb 23, 2012assist 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.
Populating ComboBox Based On Selected Item In First One
Jan 10, 2012I 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.
Populating DataGridView ComboBox Column During Runtime?
Nov 16, 2009I'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]....
Populating Textboxes Based On Combobox Selection?
Jan 8, 2010I'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...
VS 2008 ComboBox Selection Populating DataGridView?
Feb 7, 2012I 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 RepliesCombobox Selectindexchanged - Populating Combobox2 According To Selection Of Combo1
Feb 20, 2011in my windows form i have 2 combobox. populating combobox2 according to selection of combo1. combo1 i am binding on formload.
[Code]...
Populating A Combobox With List Of Names That Are Coming From A Database
Jan 28, 2009I 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 RepliesPopulating A Combobox With Times At Half Hour Intervals?
Dec 6, 2010I 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?
Populating Textboxes Based On A Combobox Selection Using A Datareader?
Mar 26, 2012I 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]....
Add One Single Item In Combobox After Populating It Form Database Table
Sep 7, 2009i 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 RepliesComboBox - Populating All Date For Specific Month Selected By User
Apr 21, 2010I 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.
View 1 RepliesMaking A Program In VS 2010 By ADODB Connection With MS Access
Sep 23, 2011I am using VB6 for a (ADODB Connection & Record set) database program by connecting MS Access file (MDB). Can I make same program in Visual Studio 2010 by ADODB connection with MS Access (MDB)?
View 1 Replies
