I'm having a bit of trouble showing the data from my access DB within my application. I am using a DataGridView to display the data. Whenever I click the button I have made to display the data.the table remains blank. I am trying to avoid using the designers in VS2010 as this is for A-level coursework and i wont get any marks.
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The situation: I have a small application where i store customers and orders.. In my database i have a tabel called Customers and a tabel called Orders. These 2 dabases are joined on Customer ID - every Order record contain a row with the customer Id.
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I am trying to create a combo box that would display data from a dataset, and also a 'Please Select' as the first item. I have written the following code which derives from a combo box and it works fine in visual studio 2003 but in 2008 would not display the comboboxtext (which is 'Please select').
Public Class DoubleDataSourceCombo
Inherits ComboBox
Dim myDataTable As DataTable
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I have data in a DataSet and want to extract 3 fields from each row in the DataSet.
Field1 = String
Field2 = Date
Field3 = Time
I then want to add all the Field1 strings to a combo list box, sorted by the dates and times in Field2 and Field3.
Is there an easy way to get the data from the DataSet in a Sorted order?
i.e. Equivalant to saying "SELECT [Field1] From [Table] ORDER BY [Field2], [Field3]" in SQL.
i having trouble with exporting data from a dataset into an excel file, mainly i have included references to excel 12.0 and included the import line:Imports Microsoft.Office.Interopand i try to export a dataset to excel using a button that contains the following:
Dim row As Integer
Dim col As Integer
Dim rowCount As Integer
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I have tried everything I can to get beyond this error which shows below as <<<<< error here. It is trying to fill a dataset from a data adapter. If I change the SELECT statement to just SELECT * FROM xTable I get the correct number of records in each table. But anytime I try with a more complex statement I get the error message shown below which indicates System.Data.Common.DbDataAdapter.Fill(DataSet dataSet. I've completely erased all data and entered a new set of test data so I know there is no problem with relationships. Each table has primary key which is foreign key in other table. IS there something wrong with the Imports section: Imports System
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I have a VB app and it has a login feature installed. Now when someone logs in into the app I want the users First Name and Last Name to be displayed on my second form where the user gets redirected on a sucesfull login. I don't know how to accomplish this as I am quite new to VB. I have provided my login code below (btw it uses an online database):
MySqlConnection = New MySqlConnection
MySqlConnection.ConnectionString = "server=;Port=; user id=; password=; database="
MySqlConnection.Open()
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I think the code which provides the first name and last name need to check the users username which was provided on the first form and search through the DB. Then when it has found the record it should recieve the First Name and Last name.
I like to make a data grid that get data from a .csv and display on the table (note all the data is separated by ",") but I have no idea how to do this.
GRW,1001,LGAV,LGTS,"NEVRA Z507 OSMOS",SX-GRI,240,161,00:00," 00:00"," 1.05"," Flight Level:240"," 80"," P"," 0123456"," 1"
GRW,1002,LGTS,LGAV,"LEKPO UB1 ABLON",SX-GRI,250,161,00:00," 00:00"," 1.05"," Flight Level:250"," 80"," P"," 0123456"," 1"
GRW,1003,LGAV,LGRP,"VARIX UL995 ASIMI",SX-GRI,270,218,00:00," 00:00"," 1.2"," Flight Level:270"," 100"," P"," 0123456"," 1"
GRW,1004,LGRP,LGAV,"ASIMI UL995 VARIX",SX-GRI,280,218,00:00," 00:00"," 1.2"," Flight Level:280"," 100"," P"," 0123456"," 1"
GRW,1005,LGAV,LGKR,"PIKAD L53 KRK",SX-GRE,240,213,00:00," 00:00"," 1.15"," Flight Level:240"," 80"," P"," 0123456"," 1"
I understand how you can expose data in a database (with access to mysql) in Odate in order to create a program in VB.NET and connect to these data with a service.
the purpose of all this is to create a software to display data, and dynamically modify the data remotely.
i am trying to copy data from a standard Dataset to a Type Dataset (XSD) of same table structure. i want to use Automapper to do that one. So how can i do that using automapper?
View 1 RepliesI have two Datagrids, One grid has all the customers garments on it with style number and contact length. The other grid has the users who have garment issued to them. the style number is in both grids. I need to loop through the users grid and say if the contract number is 1 from the first grid then the contract date on the second grid will be todays date + 365 days (year contract) I have looked at using a stored procedure and also a for each command but I am just getting stuck with it all. [Code]
View 1 RepliesI'm currently working on a Capstone Point of Sales project. We're using a multi-column list box to pull up the item #, Item Name, Quantity(may be deleted) and Price. However, I haven't had much experience with a connect database in Visual Basic. how to pull and display the data from the database into the list box?
View 5 RepliesAny code for creating the pallet for a Gray scale image, to display it on a picture box? I have written the code for creating for palette for a RGB image which is as follows:
Marshal.Copy(Image_bufffer, 0, _pImg, 1024 * 1024)
myBMP = New Bitmap(1024, 1024, 1024, System.Drawing.Imaging.PixelFormat.Format8bppIndexed, _pImg)
pal = myBMP.Palette
For i As Integer = 0 To pal.Entries.Length - 1
pal.Entries(i) = Color.FromArgb(255, i, i, i)
Next
myBMP.Palette = pal
Picturebox1.Image = myBMP 'Show the image
But the image displayed looks dull(less brightness) than the same image viewed from ImageJ. So instead of creating pallet from color.Argb, is there any way to create palette for a gray scale image?
I have a SQL stored procedure that I bind to a Silverlight Datagrid. That works ok, the problem is when I use the same stored procedure to bind a different dataset to the same grid, it doesn't display the new data, only empty columns from the last dataset that was bound. What is going on here? I tried to set the grid = Nothing and I tried using Datagrid1.columns.clear() but that didn't work.
View 3 RepliesI'm currently learning VB.net and can confidently connect to databases and return results to comboboxes run stored procedures ect to datagrids, However I'm wanting to find an online tutorial for doing loops with data so for example
I return the following data into a dataset
Orderno Orderitem Price GUID
111 Pies 1.50 xxx-xxxxx-xxxxx-xxxxxxx
111 orangutang 2.00 xxx-xxxxx-xxxxx-xxxxxxx
ect
I want to display each element on a page in a structured format so as to make a visual representation in seperate entities (labels maybe) of the data like so:
Order number
line 1 (includes item and price in plain text on a page i guess using a label)
line 2 (same goes)
Subtotal( )
The results and formulae i can do but it's simply how to split off the data from my dataset and display elements as seperates (also how will i dynamically create the lables as obviously i'm not going to know in advance how many order item rows will return )
Obviously this is not urgent but if anyone could point me at a tutorial or even better a few lines of code that will do this for the microsoft northwind data so i can mess about with it and play.
I have tried googling so much that I have given up trying to look. I am trying to display a dataset in a wpf datagrid. After that I am going to need to display the individual column value in textboxes. I can then change the value in those textboxes and pressing, say, a commit button, to commit the changes to a database. Here's the code I have so far.
Dim con As New SqlConnection
Dim dbConnString As String
Dim ds As New DataSet
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I have a dataset (WW1Dataset) with one data table(WW1).(database used in an access database) I'm trying to filter the dataset e.g a user wants to filter by a chosen surname (SurnameTextBox.text) so the datset is filtered to display only those records wherethe surname column in the dataset matches SurnameTextBox.text.
View 1 RepliesIt was written in vb6 and im trying to rewrite it in vb.net. I've completely stripped the program down from all the unneeded fancy addons and now just have the needed code to run it. The program retreives the records, but does not populate these records onto a datagrid.
Heres my Form code (Form1)
Imports ADS_SQL_TEST_VBNET
Public Class Form1
Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
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I think the problem lies within the LoadDataBound() Sub routine, but I can't say for sure since I was unable to fix this myself.
I am making a combobox from my data source. Basically, This is a projects form and the user needs to select the the primary contact which is contrained by the customer id (GETbyCustomerID) set in another field. I have it working... mostly except the combobox only displays the contact ID which is completely useless to the user. I need to know how to display the First and Last name (both are seperate columns in the table).
View 1 RepliesI'm trying to have a Message Box be displayed when the user either closes the form, or changes the tab. The Message Box should only be displayed if the data in a dataset has been edited/changed, but hasn't yet been changed.
View 2 RepliesI have a Dataset with 2 different tables. What I have to do is to display those tables in a DataGridView.What I have done with a reference is given below.
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I am trying to use a ListView to display records from a dataset. In these records, I have 4 columns: EmployeeID, EmployeeName, CustomerID, and CustomerName. It is possible for both the Employee and Customer to be listed multiple times, but with different combinations.
For instance, if we have Employees 1, 2, 3 and Customers A, B, C we could have:
(1A)
(1B)
(1C)
(2A)
(2B)
etc.
What's going on with mine is I add say (1A) to the listView and then when it tries to add (1B) I get an error saying that it cannot add the same item.
Here is my code so far:
With list
.Clear()
.Columns.Add("Employee ID")
.Columns.Add("Employee Name")
.Columns.Add("Customer ID")
.Columns.Add("Customer Name")
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I'm writing an email application that will be used to send HTML news articles to clients. I'm using a dataset to return the headlines to display to the client. When I loop through the dataset the the latest record is returned but latest headline link is not displayed. So the outputted HTML is the same headline everytime, which is the first record in the dataset. How do I move to the next record in the data set and get the outputted HTML to display the next/correct headline?
Here is a sample of my code:
'Code to populate dataset
Public Function GetHeadline(ByVal ArticleID As Integer) As DataSet
Try
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I consider myself a very patient guy with a whole lot of determination to get things working within say, a program i'm working on. However, I feel that I am only wasting precious time that I could be using to actually gain knowledge in something rather than hitting my head against a wall accomplishing nothing. It was written in vb6 and im trying to rewrite it in vb.net. I've completely stripped the program down from all the unneeded fancy addons and now just have the needed code to run it. The program retreives the records, but does not populate these records onto a datagrid.
form1
Imports ADS_SQL_TEST_VBNET
Public Class Form1
Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs)
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im trying to rewrite it in vb.net. I've completely stripped the program down from all the unneeded fancy addons and now just have the needed code to run it. The program retreives the records, but does not populate these records onto a datagrid.
form1
Imports ADS_SQL_TEST_VBNET
Public Class Form1
Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
[code]....
I think the problem lies within the LoadDataBound() Sub routine, but I can't say for sure since I was unable to fix this myself.
I want to display dataset records in textboxes instead of GridView. I also want to provide next, previous and search option to navigate between records in the dataset. And I also want to provide update and delete buttons to update and delete the current record that is being displayed.
View 4 RepliesHow can I count how many rows are returned by a dataset and then show the total number of rows as extbox.text and read-only so that the user can only see them but not change them?
so far I have this but it dosent return a number and says it cant find table 0:tbRecordsFound.Text = ds.Tables(0).Rows.Count
I have populated a dataset from a text file and I can display it in a dataview. Can I and if so how do I, select a sub set from this dataset and display it in the dataview?
View 4 RepliesI have a form that i am using for my ticket software where i am wanting to take the section combo box an have it only display the sections out of my dataset. here is something like i am wanting to do. this is my data table
Section Row No. Seat No.
A A 2
A A 4
A A 6
Then it go to
A B 2
A B 4
I want to have a combo box for each one Section, Row#, Seat# and when I drop down the box for section it will just give me the section and then when I go to the Row# box and drop it down it will give me just the rows in that section and then in the seat box it just gives me the seats in that row.
I'm working with a zedgraph bar chart and displaying only certain values from a dataset. I have a dataset with 912 records. One field is called "DeviceName" and one is called "TimesOffline". I am able to bind the chart to the dataset, but it wants to plot all 912 records. What I need is to somehow sort the dataset to retrieve the top 10% (or something) devices with the highest number of times offline.
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