Filling A List Box From A Data Set?
Oct 28, 2010
I am having trouble getting my program to work. i added a database conection and added the data source, then placed the list box i wanted in the form and the code to fill the list appeared as it should. the problem is when i run the debugger i get an unhandled exception saying "invalid user authorization". i went to the data source and previewed the data set and i can view it just fine. i did this in a different program using the same data set and had no problems.
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Aug 29, 2009
This is the code that i did to fetch data from the database and filling it to the combobox dropdown list at the form load event:
[Code]....
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Apr 11, 2009
I have an existing application that uses Active Record for its data retrieval. It's in VB.NET (first time I'm doing VB.NET; I usually work in C#). And I'm building a method to return a List(Of T) of an object. The current pattern uses a SQLDataAdapter to populate a datatable. I COULD add the record to the List(Of T) as I fill the datatable, but there HAS to be a better way to do this.
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Feb 22, 2011
how can i add records from list view to database ex. im going to have a transaction i will add products as many as i ordered in my listview and then i insert it into my database with the 1 transaction number it should be like this:
[code]...
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Mar 12, 2009
I'll start off with a brief explanation of my situation. I'm doing my A-Level coursework project at the moment and am having some difficulty trying to figure something out. My project is a VB.NET Program that connects to a Database to display/add/delete/update records. At the moment I am having trouble with one particular thing which must be solved before I can move on (and the deadline is fast approaching).
I have a combo box which contains a list of different item types (Which match up to the item types used in the database, but it is not filled from the database). When the user selects one of these options, the list box below must fill with all items of that type that are in the database.
Unfortunately I'm at home so I can't get access to my coding, but I can try to explain what I've tried. I've tried so many things after trawling though what seems like endless amounts of tutorials to find an answer.
One thing that is used in pretty much all of them is the SQL string to select the needed records;
"SELECT ItemName FROM Stock WHERE ItemType = Anime"
Now, this has been used many different ways. I think the way that I'm trying at the moment is to create a new data set that contains the records that are needed for the search. There is already a data set that contains the whole table that is needed for this particular form. I think my most recent attempt was trying to copy the relevant information from the original data set to the new one, but I can't get any coding that isn't incorrect.
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Oct 28, 2009
I dont think I am writing the values to the object. Not sure if this is the best way to do this with multiple values.Public Function ListDMR() As DMRDataLists
[Code]...
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Dec 28, 2010
I have a combo box in a form, I want to fill it with names I have stored in a database.I know I have to use the fill command, but I am not sure what code I need to use.I imagine I need to place this code in the form load event, where I wrote my code to connect to the database.Tell me if I am wrong, but, do I need to create a sql fill command, select Names From Users, then execute that command in the combo box object.
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Mar 9, 2010
finally given up trying to make it work with my stored procedure.
Info:
Sql Server - 2005
Table name - venatio_company
Dim con As New SqlConnection
[code].....
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Aug 3, 2010
I m filling my data grid asynhrous using background worker,my code looks like this:
Public Sub New()
InitializeComponent()
AddHandler DsData.Data.DataRowChanged,AddressOf table_RowChanged
[Code].....
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Jun 5, 2011
[code]when I run my program and press this button Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles exceptionsButton.Click..I have my date range within a time that I know that my dataset should produce a result, but when I put a line break in my code here: adapter.Fill(ds)and look at it in debug, I show a table value of 0. If I run the same query that I have to produce these results in sql analyser, I see 1 result. Can someone see why my query on my form produces a different result than the sql analyser does? [code]I can also verify that the variables are passing the correct values. Can anyone please assist as to why this isnt working?
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Feb 2, 2011
I have the following
Imports System.Data.SqlClient
Public Class Main
Protected WithEvents DataGridView1 As DataGridView
[Code]......
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Feb 1, 2011
I have the following code:
Code:
Imports System.Data.SqlClient
Public Class Main[code]....
and when I run my program, I have my date range within a time that I know that my dataset should produce a result, but when I put a line break in my code here:
Code:
adapter.Fill(ds)
and look at it in debug, I show a table value of 0. If I run the same query that I have to produce these results in sql analyser, I see 1 result. Can someone see why my query on my form produces a different result than the sql analyser does? Also here is my schema for my two tables:
Exceptions
employeenumbervarcharno 50 yesnonoSQL_Latin1_General_CP1_CI_AS
exceptiondatedatetime no8 yes(n/a)(n/a)NULL[code]......
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Jun 30, 2010
I'm fairly new to VB.NET but have been programming for a while. Anyway, for the life of me I can't figure out how to properly populate a datagridview in .NET. I am using VS 2010. I add the control to the form, click the arrow on the control and select "add project data source". From there, I select Database, then Dataset, choose and ODBC data source, the table I want to use and enter the data set name.
[Code]...
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Dec 2, 2010
How can I fill Datatable with DataGridView data (VB/C# .NET)?
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Jun 22, 2010
What I am trying to do is create a conosle app in vb.net 2008. I have a XML file (data_file.xml), and a template file (template.txt). The template file contains a few sentences, each one containing a placeholder which needs to be filled. I need to create multiple output files (.txt), which contains the contents of the template file, with the placeholders filled with the values of the placeholders in the XMl file.
The XML file is at the moment:
<?xml version="1.0" ?>
- <CATALOG>
- <group>
<placeholder1>Nigel</placeholder1>
[Code] .....
As it stands, I can create one template file, containing the filled template contents using only the first group of placeholders. I am nearly there, just trying to finish the last piece of the jigsaw.
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Jun 5, 2011
I have a combobox in a form, I want to fill it with names I have stored in a database. I know I have to use the fill command, but I am not sure what code I need to use. I imagine I need to place this code in the form load event, where I wrote my code to connect to the database. Do I need to create a sql fill command, select Names From Users, then execute that command in the combo box object.
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Aug 3, 2010
m using backgroundworker to fill my data grid.Here is code:
Public Sub New()
InitializeComponent()
AddHandler DsData.Proba.DataRowChanged, AddressOf table_RowChanged
[code].....
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Jul 1, 2011
below is my code:
myCommand = New SqlCommand("SELECT VisitorID, VisitorName, Skill FROM tblVisitor LEFT JOIN tblSkill ON tblVisitor.SkillID = tblSkill.SkillID", myConnection)
myAdapter = New SqlDataAdapter(myCommand)[code]....
then it catch an error as Incorrect Syntax near". which it points to myAdapter.Fill(myDataSet, "tblVisitor") not the Select command.
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Feb 11, 2011
I have this assignment which has to read the names from a sequential file and store them in the names array. Then i have to sort the array in descending order and listbox. Only I'm having a problem when i try to implement the sort method. Theres no syntax error but the sorts not happening.
CODE:
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Mar 26, 2012
I finally got this code to work after hours of toiling:
[Code]...
Now that I figured that out I was going to try and place the data in a specific location. On my application I have a datagridview set up with 4 columns. What I would like to do is put column A of the excel file under the 1st column of the datagridview and column C of the Excel File in the second column of the datagridview.
[Code]...
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Apr 4, 2010
Here i have code filling a drop down box with the company name.
Private Sub Filllistcomp()
listcomp.Items.Clear()
'define select statement
[CODE]...
This part works. The drop down menu is filled with all the company names. The following part does not work how ever.
Protected Sub listcomp_SelectedIndexChanged(ByVal sender As Object, ByVal e As EventArgs) Handles listcomp.SelectedIndexChanged
'create the select statment that serches for a record
[CODE]...
There is no error thrown either. The information is just not showing up.
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Mar 27, 2012
I am having difficulty trying to fill two different comboboxes (cbo) with data from a database. More accurately, the 1st cbo gets filled correctly, but when I attempt to do something similar with the second, I'm getting an error about not being able to use the & Operator in my SQL string (Operator is not defined for string and DataRowView types). So evidently the SelectValue from my combobox isn't acting the way I expect.
The overall goal of what I am attempting to do is to fill two cbo's, one with a list of contracts and a second as a list of parts given the selected contract from the first cbo. There are 3 tables in the database that I am drawing the data from: the "contract" table, the "parts" table, and a bridge table called "partList" that has foreign keys pointing to the two other tables. The first cbo is a basic query to the "contract" table using "ContractName" as the display member and "idContract" as the value member. The 2nd cbo I would like to display the name of the part from the "parts" table but use the id of the part from the "partsList" table, and to further filter this list based on what contract was selected.
I am writing the code in VB.Net from VS 2010, storing the data in a MySQL DB, and using a DBFactory to create all the components from ".GetFactory(MySql.Data.MySqlClient)"Below is the code that has the two places I am attempting to fill the two cbo's. Also if there is a better way to handle this, please let me know.
[Code]...
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Nov 2, 2011
I am filling up a datagridview with data from an sql server - view. I have in the vie 3 columns and each column should have for each cell values like TRUE or FALSE (or NULL) I need a script to put a picture in datagridview for true, one for false and nothing for NULL This should be done in VB.NET
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Feb 13, 2009
I have a form with text boxes ,masked text boxes e.t.c there is a binding (data) source MytablebindingSource). when i open the form the on form_load event i use the following code
[Code]...
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Sep 8, 2009
I need to read data from text file to datagrid. I have a datagrid with 3 columns: Column1, Column2, Column3. I have two columns in my text file, eache is separated by double space. I need to make so that column1 from text file goes to column1 into datagrid and colunm2 from text file goes to column3 into datagrid. Column2 in datagrid will be filled with values from OPC server. So i made a simple
Dim mSr As StreamReader = New StreamReader("C:VBpirm.txt")
Dim mLine As String = Nothing
Dim mArray() As String
[Code]...
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Jan 9, 2011
I got a problem I need to search by First Name OR Surname. So the user can enter one or the other or BOTH.
So here's what I got I set two primary keys to try and find the row but I'm gettin all sorts of problems, for example when I set FirstName & Surname as primary key which you need to do to use the find method i get an error as it expects two values..
Dim da As New SqlDataAdapter
Dim con As New SqlConnection("Data Source=UserSQLEXPRESS;Initial Catalog=StudentTeacherDB;Integrated Security=True")
[Code]....
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Mar 26, 2012
I finally got this code to work:
vb
Dim path As String = OpenFileDialog1.FileName
Dim myDataset As New DataSet()
Dim strConn = New OleDbConnection("Provider=Microsoft.ACE.Oledb.12.0;Data Source=" & path & ";Extended Properties=""Excel 12.0;HDR=YES;IMEX=1""")
Dim myData As New OleDb.OleDbDataAdapter("SELECT * FROM [Sheet1$]", strConn)
myData.Fill(myDataset)
DataGridView1.DataSource = myDataset.Tables(0).DefaultView
Now that I figured that out I was going to try and place the data in a specific location. On my application I have a datagridview set up with 4 columns. What I would like to do is put column A of the excel file under the 1st column of the datagridview and column C of the Excel File in the second column of the datagridview.
So replace:
vb
DataGridView1.DataSource = myDataset.Tables(0).DefaultView
With:
vb
DataGridView1.columns(0) = myDataset.Tables(0).columns(0)
DataGridView1.columns(1) = myDataset.Tables(0).columns(2)
Obviously this doesnt work, and something tells me I might need a for loop to import the data, but I have never imported information from an Excel file before and to make it worse I have never worked with datagridviews before so I have no idea how to go about this.
I would like to do something like this if I could:
vb
For x = 1 To xldoc.rows.length - 1
DataGridView1.Item(0, x).Value = CType(xlDoc.Cells(0, x + 1), Excel.Range).Text
Next
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May 31, 2010
I am designing a form to Enter new City Name list where i accept following fields
CityName, District, State, Country, Pin.
because a State names and Country names can be retrived from earlier entries, i want to allow user to select desired name from a list in combo box or a list in Auto Complete Custom Source for text box, to do this i have added a Table Adapter to underlying DataSet having Query "SELECT DISTICT STATE FROM CITY ORDER BY STATE".
Now, how do i use this Table Adapter to fill the ComboBox List without binding
And also Custom Source List for TextBox.
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Jul 22, 2009
I have a small 10px by 10px image, and I want to use VB.NET to find out if that image is (an exact) part of a larger image.I thought a method of doing this would be to lock the bits of the larger image into memory and then loop through each pixel in the image and for each pixel, I could take the 10px by 10px section which is down and to the right of that pixel.. and then compare it to my smaller image.
This is the code I have so far:
'Lockbits of larger image to memory
Dim bmp As New Bitmap(Image.FromFile(System.AppDomain.CurrentDomain.BaseDirectory() & "picture.bmp"))
Dim pxF As PixelFormat = PixelFormat.Format24bppRgb
[code]....
when I'm looping through the 10 by 10 section and I find the R G B bytes for each pixel, how do I store this in my rawImage array so I can convert it to a back bitmap and compare it with my original small 10by10 image?
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Jan 20, 2011
I have three table and I want to put the three table's data in one variable and from that variable i will produce the datatable and then want to write the data in CSV file.I am Following this step..
Void
GetDetails()
DataClasses1DataContext
[code].....
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