I'm writing my first Vb application and have come to a grinding halt... I've created a windows form which has got a datagridview (which is populated by a tableadapter and a dataset generated from a SQL stored procedure) with two columns (Product and Qty), I'm populating the Product Column using a Stored Procedure, the user then adds the quantity. Once they've finished filling everything out they'll then hit a save button and I then need to insert both columns (along with a reference number which I'm getting from a text box) into a table on a sql server.
Im new to vb.net and would like to know the very basics on how a datagridview works? how does it populate data from the database? what process does vb follow to update this datagridview? I'm trying to get my head around the following terms and need some explaining how they work and how they are linked? if possible, is there a link to a diagram that explains this?
I have an application in which I have to populate a datagridview from one table from an access database. Here is the code that I use to open and close .mdb file.
Public sql As String
[Code]....
... But I don't want to use this way... I want a different way with a dataset or... I don't know.
I have made DataGridView in the designers and connected an Access database to the datagridvies and the Column headers appear as they should and when I check in preview mode all the fields are correctly populated. However, the DataGrid is not populated in normal mode at all. I have been trying to run the project but nothing is happening. What can I do to populate the field.
This is some of my code. But how do I populate a datagridview using the datareader.
Dim strSQL As String = "SELECT peopleid,firstnames,surname FROM people;" Dim cmd As New MySqlCommand(strSQL, con) 'cmd.Parameters.AddWithValue("Parameter1", strName) Dim reader As MySqlDataReader = cmd.ExecuteReader
I just spent over an hour looking up on the internet how to fill a combobox for each row in a datagridview that is unbound. I am adding the rows manually by code. The columns are already there and one of them is set to a combobox.
how to add two items to the combobox? Each row will have the same items available in the combobox.
I have an accdb named base.accdb in the root folder of the program. Basically I have several tables in my database and I need to show their values in listboxes (essentially allowing menus to be edited by adding/removing items in the table)I can't figure out how to connect the database (according to my friends/classmates), and i can't figure out how to pull the information from the table.
Ultimately, it would be nice if someone could tell me how I can pull out the information into maybe an array? so that if i add 3 items into the table, then it will create 3 variables in the program and put the values from the table into those variables.
I have my mysql query selected fields (item_code, item_name, item quantity, item_selltype, item_selldetail) but some of these fields are variants.
Dim sqlConn As String = ("SELECT item_code, item_name, item_quantity, item_selltype, item_selldetail FROM qa_items") Dim objDataAdapter As New MySqlDataAdapter(sqlConn, objConn)
I need to pull from an access database to populate a combobox. Then from there I need to have a second combo box populated depending on the selection in the first box. My thought of an example would be a website that is setup for selecting car make, modle,year...can that be done in VB?
I have two DataGridViews in one window. The first one displays 2 columns, itemNo and taskWhen I click on a row in this grid, I want to populate the second grid with corresponding material. It is organized so that the itemNo in grid1 is 1, 2, 3, and so on, and so when a row is clicked, I want grid2 to show data that is 1.0, 1.1, 1.2, 2.0, 2.1 and so on. This data is all available in a table that exists within a dataset. However, tableAdapters do not use the .StartsWith function. I am able to get the information from grid1 when it is clicked on using Me.DataGridView1.CurrentRow.Cells(0).Value.ToString but how can I use this to get the data from the table into grid2
I have a DataGridView that I'm trying to populate using a For loop:
Dim serverName As String = SQLServerName + "" + Instance Dim server As Server = New Server(serverName) Dim Datatable1 As New DataTable For Each database As Database In server.Databases Dim row As DataRow = Datatable1.NewRow
[Code]...
The DGV has been designed with the designer (columns, layout etc). Using the above the DGV does not populate. I was using a ListView for this but I need images in a subitem so have switched to using a DGV.
I was just handed a VB.NET prototyping effort, and I'm not very experienced with VB.NET.I had to create a stored procedure which returns a self-referential table in order. Once, I completed that I wanted to get a DataGridView to show the results.
Previously, my team has been doing a lot of this via the GUI designer of VB.NET so I don't have a ton of code to describe, unfortunately.I was trying to follow their pattern which I will briefly describe here:
I have a DataGridView whose DataSource property points to a BindingSource. The BindingSource points to a DataSet. The editor for that DataSet calls a TableAdapter which gets the data from the stored procedure.
I previewed the data for the TableAdapter. The data is there. On frmMain's load the TableAdapter's Fill command is run. Not seeing anything. And my hunch is that this is way too complex a process to be correct. Or maybe not. I did a lot of Google searches before I decided to bother you fine folks.
Using SQL Server 2008 I created a Stored Procedure called MyStoreProc and it runs fine from the Management Tools.
In VB.Net 2008 I created a new dataset and a new TableAdaptor. In this table adapter I created a new Query called FillByGrid and selected the Stored Procedure. Previewed data and it previewed correctly.
On a form I created DataGridView and selected the Table Adapter from the dataset.
I ran the app and no data is shown. Visual Studio autocreated the code below and I changed it to select the the Query I just created:
No data is shown on the grid so I tried the manual approach:
' Create the dataset Dim da As New SqlDataAdapter, ds As New DataSet Dim conn As New SqlConnection
[Code]....
Still no data shown. However stepping through the I can see that the connection is open, and "da.Fill(ds, "tbl1")" takes a little bit of time as it is running the Stored Procedure and ds table has the correct number of rows and columns. Its just not being shown on the datagrid.
Creating another table adapter in the dataset and returning data from a database table using a standard select * from table command display in the datagridview fine.
I am trying to auto populate some fields in my datagridview on my form called frmInfo.
I will try to explain what I need. The main form of my project is called frmEntry. frmEntry is mainly a data entry form only. A binding navigator is present to navigate between different record stored in the database. I want the datagridview on frmInfo to "grab" info present in the text fields of frmEntry.
I am trying to click a checkbox in the datagridview to automatically populate a textbox in the same datagridview with the current date/time.
I have the following code which gives the error
Private Sub DgvReturns_CellClick(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles DgvReturns.CellClick If e.ColumnIndex = 4 Then
I'm connecting a MS-SQL remotely with VB2008 Express.I defined two different methods - the first one is copied from my old VB6 application, which is working perfectly.In this application, the retrieved data is added to a listview control, not datagrid!
Code: Dim myconn As ADODB.Connection Dim MyRecSet As ADODB.Recordset myconn = New ADODB.Connection
[code]....
The SQL query contain several table, thus I used a "*" instead for the table name- not sure this is correct?
I have a DGV that is bound by an untyped Dataset. My select query consists of using 5 columns from 2 different tables. I fill a dataset with the results of the query. I assign the dataset to the DataSource of the DGV but don't assign the DataMember. The DGV doesn't populate, however, when I test the query it runs like it's supposed to
I use a Datagridview control, in which I need to display info and after that to export it to an excel document(but the export to excel part it's not important right now). I need to display in the Datagridview 2 fields:name and item, from a table(here 's where I thought I should use select) and also the value field which has to be calculated using a certain formula... Let's say value= a+b
How do I loop through a dataset and populate a DataGridView - heres my code. Hopefully someone can point out where Im going wrong... Not getting a specific error, just failed message box. when i take out the try/catch function then Im given no error but the DataGridView does not populate.
I have a DGV that is bound by an untyped Dataset. My select query consists of using 5 columns from 2 different tables. I fill a dataset with the results of the query. I assign the dataset to the DataSource of the DGV but don't assign the DataMember. The DGV doesn't populate, however, when I test the query it runs like it's supposed to.
How can i bind a comobox selection to a datagridview without writting code...
i Need to select an item from a combox and based on that item refresh the datagrdiview. I did something like that in Access but i don't know how to make it work in visual studio 2008.
once i select the datagridview itme that i want to edit i'd like to be able to update back to the database. I know i need to write code for this but at least i'll have the data refreshed on the datagridview.
I hope someone can guide me in the right direction. I'm using VB2008 and I have been writing some small apps just to get me started in programming (I'm pretty much a newbie) and all was going well until now. I recently was experimenting with an n-tier style application. My application is as follows:
1) SQL Server 2008 database
2) Data Access Layer
3) Business Logic Layer
4) WCF Service
5) Winforms Client
My Winforms client retrieves data from the database via a call to a WCF service. I want to make the UI more responsive and to prevent it from locking up when its pulling down data from the database and populating a datagridview. I have looked at the background worker component but I am unsure how to implement it properly. To currently populate the DGV I simply use the click event of a button, as follows.
I just want to simply be able to edit a database directly using a Datagridview. That includes adding new rows, editing existing ones, and deleting rows. So far if I have been able to get one of those actions to work, the others do not. I found the codebank entry by JMC and I am trying to use it to connect to my database. I have a bindingsource, a dataset, and tableadapter created via the designer. Now I need to figure out how to combine all these components.
VB.NET Imports System.Data.SqlClient Public Class Form1 Private connection As New SqlConnection(My.Settings.Database1ConnectionString) Private adapter As New SqlDataAdapter("SELECT ID, Name, Quantity, Unit FROM StockItem", connection) Private table As New DataTable [Code] .....
