Dim myQuery = "UPDATE table1 SET data= CONCAT (data,'" & vbCrLf & "[ " & Date.Now() & " ]" & " " & "[" & getCN() & "]" & " " & txtTelenotes.Text & "[ item1 ]" & "') WHERE id='" & txtID.Text & "'"
[code].....
I have created in Visual Basic .net a new DataGridView in my form. I have used the wizard to show some fields of a table in my access database.I would like to add a refresh button and force the datagrid to load the data again from the database, but I'm not sure how to do that. I have tried several refresh method but it does not work.
View 1 RepliesIf using a datagridview to update a database and the datagridview is bound to a bindingsource which has its datasource as the table to be updated: where dshould you place the tableadapter.update(mydatarow)
View 5 RepliesDuring the first form_load a thread is created from a function of second class(hb) which constantly works and changes the status of parameters i.e enabling or disabling some buttons on GUI of form1 But it is not happening.Problem is the [code]...
View 7 RepliesGUI not refreshing when trying to update it thorugh other windows form?
View 7 RepliesI have 3 text boxes that are related on a form. They come from the same dataset and the same table in the dataset. The 3rd textbox is defined in the table as the product of textbox (really the column) 1 and 2. The problem is when I save after changing textbox 1 or 2, 3 does not update reflecting the new product. I have a different form using a different dataset that does a similar setup correctly. What could be the difference between the 2 forms or tables or dataset that I could look for?
View 5 RepliesI have an application doing the following:
- Treeview with customers
- on clicking a treeview, for every project of this customer, a new MDIchild opens, where the products of this project are displayed
- the MDIchild is basically a DataGridView, which is connected to the products-table via a DataView
my Problem comes after changing a value in the products DataGridView:
- if i do not change the row, the changes will not go back to the database after an update
- if i do change the row after entering a new value, everything works fine
The strange thing is, that in both cases, the value in the DataTable is changed, the DataSet is "hasChanges=True" and the DataRow's state is "Modified".
I want to save changes made in the Datagridview back to the database. I came accross Martin's solution HEREbut get an error: NUllReferenceExpection was unhandled. Object Reference not set to an instance of an object. Here's my code:
Dim con As New SqlConnection("Data Source=.SQLExpress;Initial Catalog=MyDb;Integrated Security=True")
Dim cmd As SqlCommand
[code].....
Here is my code, but its the other way around, it commits changes to the datagridview when the database is updated.
Imports System
Imports System.Data
Imports System.Data.OleDb [code]............
I am filling my datagridview with the code below
Dim trh
As String = deneme.Text
Dim pt As
[Code].....
I'm using DataAdaptors to pull data into a DataGridView. I want to make changes to the data via my DataGridView and then update the database when the user clicks the 'Update' button, but I can't figure it out. Below is my code.
[Code]...
here's my code in filling a datagridview,which i retrieve from database mysql,
[Code]....
how to update database when values in the datagrid change?
I am using VB NET 2005 and Sql server 2000.I have 2 tables which have 1 to M relationship.let's say:ProductionMaster (ModelNo, Description)ProductionDetails (ModelNo, ItemNo, ItemDescription, QuantityPer)once the form load, I fill the tblProductionMaster which ModelNo into txtModelNo.so once the txtModelNo got event "Changed", the datagrid will be filled base on ModelNo. (in this case I use dataset, datatable and dataadapter).but the I only use this query SELECT ItemNo, ItemDescription, QuantityPer FROM tblProductionDetails WHERE ModelNo = '" & txtModelNo.text & "' and filled it into datagridview.the question is how I update the DATABASE if user change the value in datagrid?let's say, user change the ItemNo from "A" to "B" in column ItemNo in datagrid so the rest column (ItemDescription and QuantityPer) will be followed change, how I update the database once the cell lost its focus?
View 1 RepliesI have a form that uses a tab control. On the main tab is a DataGridView containing Customer information. If I double-click on a row in that DGV, I go to another tab in which I can either make changes or delete the record. Whatever I do, whether it be delete it or modify it, after clicking on the appropriate command button, focus goes back to the main tab. What I wish to do is have the changes be reflected on that DGV. If the record is deleted then I want the DGV to not have that record present. This DGV is bound to a BindingSource. What control/dataset to I need to "Refresh" in order for this to happen?
View 3 RepliesI have connected my access database to vb.net and program is capable to show the database in the datagridview. but what i want is when i change the data in the datagridview and click onto update button,changes i made should be saved in database so when i execute the application again i should be able to see the updated database in the datagridview.
[code]...
I'm facing a problem while updating data in a database through datagridview. I'm changing the cells using a for loop and then updating db using below code. All data rows get updated but 1 (the last one).
Here is the code I'm using :To load data:
ds = New DataSet
cmd = New SqlCommand(query, cn)
[code]....
I�m trying to make a simple database editor using DataGridView.I have one DataGridView containing a lot of data on products and some parameters on how they should be tested. Some of these parameters, for example "Test method", is just a number. But if I look in the table for Test Methods that number has lots of other parameters. So if I select a "Test Method" Cell and click a button that table opens in a new form with just that "Test Method" (if I for example have selected a cell with the number 1, Test Method 1 will be shown in the new form). So far everything I�ve said works. I can even change values and update it to database in the first "Products" table. So here is the problem The DataGridView that shows the products is bound to a table and always shows the same thing which makes it easy to change and update using the following code
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Me.INPUT_PRODUCTSTableAdapter.Update(Me.TestPlattformDataSet)
Me.TestPlattformDataSet.AcceptChanges() End Sub
This will change later when I add a search function. Then this will need the same modification aswell. The DataGridView thats shows the other parameters can�t be updated using just this code cause I get an error that says
"InvalidOperationException" "Update requires a valid UpdateCommand when passed DataRow collection with modified rows."
It seems like the problem is that because I change the data under run its not really bound to the database. And I haven�t found any complete solution to this. I have found some similiar problems and it seems I need to update each row using the command
TableAdapter.Update(DataRow)
Here follows the entire code for showing the Parameter Table in a DataGridView. This does not work.
Public Class Form3
'ID is the value from the cell selected in the Products table
Dim ID As Integer
[code]....
How To Add, Delete And Update Database Using Datagridview
View 5 RepliesHow do I Update my database when I edit in a DataGriedView?
View 11 Repliesi have access database. its data is laoded to datagridview in vb.net langauge. i want to edit some data in the datagridview and this edit should be save in the database too when i press button edit. i used this code but it is edit for only one time and if i do any action before it it will not work.
Dim ConnString As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:UsersHaidarDesktopcustomer listNewFarahnetFarahnetCustomers.mdb"
Dim SQLString As String = "SELECT * FROM customers ORDER BY Fname ASC"
private da As OleDbDataAdapter
[Code]...
I'm trying to get the Update button and my Delete button to work. Please advice me accordingly on what I'm doing wrongly. And as for the delete button, I have little clue of doing it. What I want the Update button to do: Basically I have a datagridview in my form. And the DGV displays all the records I have in my mdb file. The user could edit the records directly at the DGV and when the Update button is clicked, both DGV and database gets updated.
[Code]...
My datagridview is displaying records from table in database.When I go to add a new record the 'pencil' icon does not appear so when I click on save button update to database table does not take place.code behind save button is
BindingContext(TheatreBindingSource).EndCurrentEdit()
PatientTableAdapter.Update(TheatreDataSet)
PatientTableAdapter.Connection.Close()
i have spent all day trying to sort this ...any ideas and yes my theatrebindsource.allownew is set to true
Private Sub cmdCharge_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdCharge.Click
Connect()
Dim cmd As New SqlCommand[code].....
I'm using DataAdaptors to pull data into a DataGridView. I want to make changes to the data via my DataGridView and then update the database when the user clicks the 'Update' button, but I can't figure it out. Below is my code.
Dim SQLconnetionString As String
Dim SQLconnection As SqlConnection
Dim SQLCommand As SqlCommand
[Code]....
I need to "refresh" a DataGridView, bound to a database table, on a form within a TabControl The DataGridView is loaded correctly on strartup... But if the data in the DataBase change, How do I refresh it to reflect new records or updates?
this is what I am doing in code, after looking for some examples on the web:
MyTabBindingSource.EndEdit()
Me.MyTableAdapter.ClearBeforeFill = True
Me.MyTableAdapter.Fill(Me.MyDataSet.MyTable)
[Code]....
but nothing changes at all...Do I need to refresh/repaint the TabControl as well as th Form containing it? or what else??
I have a datagridview control on my form which i have populated it with values from a dataset. Now i am using a button to delete these values from the database which is working perfectly for me but the problem now is anytime i delete the old value still shows in the datagrid which shouldn't be so so i wrote the code to refresh the grid after deleting but is still not working for me as i want.
I am using this code:
Me.UserAccountsDataGridView1.Refresh()
But onething is the value i deleted doesn't show when the form reloads again. but at run time it still has the old value in it again.
I am trying to refresh a datagridview from a second form to display newly written data. I have read the posts on this topic and can't figure mine out. My first form opens and you input data into text fields, etc. and then you need to select items from one table to copy and write to a new table. The datgridview on the first form shows the new table, and I have a new form that pops up to select the line items to add. Everything works perfectly except when I close the selection form after selecting lines, I would like the datgridview on the first form to refresh to show that the lines have been selected and displayed in the datagrid.
My data is loaded into the datagridview as so;
Public
Sub ShowVoucherLines()
cmd =
[Code]......
I am attempting to refresh my datagridview but it does not seem to work. I have a separate frm where people insert data, and then I have a button on the main frm where people can click refresh once the other frm is closed. I click refresh and yet the data does not update in the datagridview
Private
Sub
KryptonButton3_Click_1(ByVal
sender As
[Code[.....
I'm using a DataGridView in a Windows Forms application to update a table in my SQL CE database. The code runs without error; however, it appears that the database table is not being updated. I had this working at one point, now it is no longer working.
Private Sub BtnCommitChanges_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles BtnCommitChanges.Click
If Me.CLCitiesDataSet.HasChanges = False Then Exit Sub 'Exit sub if no changes to dataset
Dim SQLCommand As New SqlCeCommand("SELECT * FROM Cities")
[code]....
Any tutorial and maybe a sample project that can be downloaded that shows how to update a database such as MS Access from DataAdapter commands in which changes are made in a DataGridView? For example, the DataAdapter contains 2 tables called FirstTable and the other table would be called SecondTable. The DataGridView is based on a query that shows rows from both tables. The actual table that contains the rows to be changed, inserted or deleted is FirstTable.
View 6 Replies
