how i can take a row data in a datagrid and insert it into a table on my database?
I have the following code, but it doesnt seem to be working.
Dim conn As String = "Data Source=..."
Dim SQLString As String
Dim paramColl As SqlParameterCollection
[Code].....
This is my code for update event
Protected Sub GridView1_RowUpdating(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewUpdateEventArgs) Handles GridView1.RowUpdating
Connection.Open()
[Code]....
it is deleting and fetching fine but while trying to update it shows nullreferenceexception was unhandled by user code in this line:
a = Trim(empname.Text.ToString)
Protected Sub GridView1_RowCommand _
(sender As Object, e As GridViewCommandEventArgs) _
Handles GridView1.RowCommand
If e.CommandName.CompareTo("command") = 0 Then
Dim itemID As Integer = Convert.ToInt32( _
GridView1.DataKeys(Convert.ToInt32(e.CommandArgument)).Value)
[Code]...
Basically, it doesn't work and I don't get it. I've been trying to figure this out for a few days now and I can't see what I've done wrong. As you can see I'm trying to manually update a field in my database with the value of (originalvalue)+1 when the user clicks the buttonfield of the corresponding row.
I guess what I'm asking is if anyone can point out any mistakes, please do, or if there's a better way to do this (without having to go through all the DAL/BLL BS)
I've got my code to delete rows out of the database when the user clicks on the Delete button in my GridView, but the GridView isn't updating to reflect the new data changes.
Here's my code:
<asp:GridView runat="server" ID="grdQuestions" AutoGenerateColumns="false" Width="100%" CellSpacing="10"
PagerSettings-Visible="true">
<HeaderStyle CssClass="aspNetHeader" />
[code]....
EDIT 1:Did some stepping through the code and found that e.CommandArgument is not getting a value in grdQuestions_RowCommand
EDIT 1 (Revised):The fact that e.CommandArgument wasn't getting a value was my mistake. I'd changed the way it's value was being assigned without removing the previous method.The code runs through grdQuestions_RowCommand and then goes into grdQuestions_RowDeleting and then executes GetModuleData.I have a feeling that to view changes to the grid, a PostBack might be required, but I've removed all DataBinding to an If Not IsPostBack Then block because the alternative caused problems with the DropDownList whose selection is used as a reference to populate the grid (ddlModules selected the Module whose Questions will display in the grid).
I have a gridview and have modified it following this article: url...to allow bulk updates. Whenever I try to update a row in this loop:[code]
View 1 Repliesi put all my custom "update" code in the RowCommand event, it works fine, but i still get an error from my Data Source
System.NotSupportedException: Updating
is not supported by ObjectDataSource
'GetSources' unless the UpdateMethod
[code].....
What im trying to accomplish is to try to edit a gridview by using the updating event but not sure how to do this. The way im populating the datagrid is putting it into a dataSet and using that as the dataSource and doing a databind. Here is my datagrid below.
[Code]...
For some reason, when i click edit on my gridview and change a value, and hit update, it does not update the database or the gridview, and it shows no error
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="id"
DataSourceID="SqlDataSource1" OnRowDataBound="GridView1_RowDataBound" AllowSorting="True" BackColor="White" BorderColor="#DEDFDE" BorderStyle="None" BorderWidth="1px" CellPadding="4" ForeColor="Black" GridLines="Vertical" ShowFooter="True" style="font-size: 10pt">
<Columns>
[Code]...
The following code runs successfully with no errors, but I still don't get the new data from the grid, by adding a break point, and stepping forward, the data in the variables are the original data, not the updated data.
Private Sub grvSample_RowUpdating(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewUpdateEventArgs) Handles grvSample.RowUpdating
Dim row As GridViewRow = DirectCast(grvSample.Rows(e.RowIndex), GridViewRow)
Dim passportNumber As TextBox = DirectCast(row.FindControl("txtNumber"), TextBox)
Dim expiry As TextBox = DirectCast(row.FindControl("txtExpiry"), TextBox)
[Code] .....
I'm working on a project where users search for an item with it's unique number, which retrieves the data from a stored procedure, ordered by date in different rows.That works ok. After that, i have to select a row to update it's status, like from "open" to "close"( I'm using a command Select button to select the rows), but the problem occurs when i click the "Update" button,
<%@ Page Language="VB" MasterPageFile="~/Master Pages/edenorte.master" AutoEventWireup="false" CodeFile="SubirCierre.aspx.vb" Inherits="Edenorte_Operations_SubirCierre" title="Untitled Page" %>
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How to show pop up menu from database in gridview on each gridview row items ?Example of this is : http:[url].....Move your cursor to Departure time and arrival time...a want this type of popup in gridview items....which fetch entries from database..
View 2 RepliesUPDATED: Here is the SP, it doesn't match exactly because of ongoing testing, but you get the jist. Some fields are commented out because of testing...
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There is something wrong with my codes. I don't know why it isn't updating the records.If I activated the line dt.Rows.Add(newrow) it will just create an error on da.update(dt) line QuoteThe changes you requested to the table were not successful because they would create duplicate values in the index, primary key, or relationship. Change the data in the field or fields that contain duplicate data, remove the index, or redefine the index to permit duplicate entries and try again.But if I deactivate that line, no errors will be occurred but the record won't update.
Here is my code
Dim dt As New DataTable
Dim ds As New DataSet
ds.Tables.Add(dt)
Dim da As New OleDbDataAdapter
[code]....
Whenever I try to update a row in my database, it works, but as soon as I restart the application, the changed information resets.[code]....
View 10 RepliesI have the following sql query that on debugging contains what looks like the right thing however the database is not being updated, but the code runs fine:
con.Open()
For i = 8 To ds.Tables("AddressBook").Columns.Count - 1 'Counts the amount of columns in the database
[Code]....
i am haveing problems updateing my customer details i was wondering if i could use the code i have for add and change it to update maby insted of useing the INSERT I could use a UPDATE or something anyway
Public Sub updateWithNewOrders(ByVal aOrder As Order)
Dim cmd4 As New OleDbCommand("INSERT INTO ORDER
(OrderID,CustomerID,OrderTotal,ODate,EmployeeId) VALUES (?, ?,?,?,?)", con)
[Code].....
I have an field which i have to update based on the selection of listbox.When i select listbox based on that when i update my fiels it should be updated
Dim cnstring As String
cnString = "Provider=Microsoft.Jet.OLEDB.4.0;Persist Security Info=False;Data Source=AirLine.mdb"
Dim sqlQ As String = "SELECT NoofCoachseatsAvailable,NoofCoachSeatssold FROM FlightDetails WHERE flightname='" & s & "' "
'Create connection
[Code]...
Dynamic SQL generation for the UpdateCommand is not supported against a SelectCommand that does not return any key column information. Is my selection (Based on Listbox selection) is the wrong part here.
the problem is when I click the 'save button' and then exit. Then open again, the total records still unchanged
the code used
Private Sub btnSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSave.Click
Validate()
Supplier_s_informationBindingSource.EndEdit()
Supplier_s_informationTableAdapter.Update(Bookster_databaseDataSet1._Supplier_s_information)
End Sub
then I try to put Me.
Private Sub btnSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSave.Click
Validate()
Supplier_s_informationBindingSource.EndEdit()
Me.Supplier_s_informationTableAdapter.Update(Me.Bookster_databaseDataSet1._Supplier_s_information)
End Sub
I don't know if make a difference but how to update the database also, what code should I put?
i have published my website...its a dynamic site..so i have database connectivity..now i want to make an application in VB to update my database using my application..i mean i do not want to login to the site and update my database rather update it using my application..i want to connect my application to the database of the published site and update it from anywhere i want using the application...is it possible??
How can i do it??Please point me to the right direction...its urgent.
I've seen similar problems posted on this and other boards, typically with a bunch of code checking before its realised that that database itself is being copied to another directory and run from there. Apparently this is managed via the database properties, copy to output directory settings. In my case I have tried all three options, with no change in result. After "saving", inspection of the actual database via the server explorer shows no changes have actually been committed.
I am getting to a point where I need to start entering large amounts of data into the app and have at actually save to the db for deeper testing.
I noticed this behavious first when using an .accdb and it has persisted through my exploration of SQL(.mdf)
db Output Option Selected / Result
always copy... data changes do not persist between debug runs and is not entered into actual database
copy if newer... data changes do persist between debug runs but is not entered into actual database (checked via server explorer)
Do Not Copy... generates the below Error on execution
System.Data.SqlClient.SqlException was unhandled
Message=An attempt to attach an auto-named database for file C:UsersXXXDesktopVisual Basic ProjectsSQLtestWindowsApplication4 - CopyWindowsApplication4inDebugMyDatabase.mdf failed. A database with the same name exists, or specified file cannot be opened, or it is located on UNC share.
I am a newbee to the programming. So please guide me if i am wrong. up to binding of the datasource my programe working perfect but during save button it gives error.(Value can not be null. Parameter name : daatTable)
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I'm having a database, using GridView I retrieve the data into my WEB application.Then I set the rows to editable (not sure if it is fully completed) and when I edit some cells I want to update the GridView AND the database behind.When I click on 'edit' then the button is changed to update. I get some unhandled exception. I don't expect anything else since I didn't put any code in the update methods like RowCommand, RowUpdating, RowUpdated, RowDataBound.
View 4 Repliesteaching myself (an oldfashioned VBA programmer) VB2010 by converting an existing Access 2003 application to VB2010. I can read my data from an Access database into a datagridview:
'Biog datagridview
cnGrid.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:UsersPeterDocumentsDatabasesTestDatabase.mdb;User Id=admin;Password=;"
[Code].....
I would like to know if how can I update my database using oledbCommandBuilder below here is my code:
'save changes made and store it to our database
newDataRow = ds.Tables("employeeTable").NewRow()
newDataRow.Item(0) = comboPosition.Text
[Code]....
The error that I get is "Syntax error in INSERT INTO statement." It almost took me 1 day but I cant configure how it still become error. below here is the part where the error came from
da.Update(ds, "employeeTable")
im having problems saving and and updating my database. created in the database explorer.Run thorugh what ive done, created tables saved the job, imported the database dragged items on to screen.
Ive looked at my xsd file and Update and delete comands havent been set, how do i set them and is there a default to preset them when ive i create new databases. its really great you helped out..
Basically I want to be able to save any data I enter into my data grid / dataset ermanently , so when i close the program or restart it the data I previously entered within the grid will be present.This is what I have so far
BindingContext(CustomersDs, "Customers").EndCurrentEdit()
OleDbDataAdapter1.Update(CustomersDs) is called Shop.mdb )
[code].....
Imports System.Data.OleDb
Public Class Form1
Dim con As String = "Provider=Microsoft.Ace.OLEDB.12.0;" & _
[Code].....
I keep getting the error that :'No value given for one or more required parameters' when trying to update yet I see nothing wrong with the code...how can I eliminate this error?
I saw this code in a book but unfortunately, I have no idea how to run it. In what event handler do I place the code? Will the Insert, Update and Delete be called at once? How do I supply the value of the "paramater_Old"?
I am using Windows form such that everything revolves around the values of textboxes on the form.
Imports System.Data.SqlClient
Public Class Form1
Dim strConn As String = "Data Source= .SQLEXPRESS;Initial Catalog=Northwind;Integrated Security=True"
[Code].....
I'm having an issue with using code to update a program that's trying to save data to a database. The problem is where I have found many answers on restricting the number of rows updated. All data that I have is on a single row in the database. Here's the code that's absolu
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What I am trying to do is update a label with a value from a sql table using a combobox.this is a record from the table concerned
Species_ID (PrimaryKey) | Species | Genus_ID | Avg_Length | Avg_Height | Est_Weight | Diet_ID
1 rex 1
46 18 14000
1
On my form I have a combo box that is bound to this table with Species_ID as the Value Member. When I select a value from the combo box I want to update 3 labels with data from the Species_ID row corresponding to that value.