Gridview Row Updating Error
Jul 21, 2011I 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 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 RepliesAm having problem updating in gridview with vb.net, the C# version worked fine but the VB is throwing this error: Object reference not set to an instance of an object. below is my code:
[Code]....
i 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].....
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].....
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] .....
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'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" %>
[code].....
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).
UPDATED: 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...
[Code]...
I'm trying to update data to a Access data base using the following [code]...
View 3 RepliesI 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")
I'm getting the following error trying to update a SQL 2000 table from a DataGridView:
"Dynamic SQL generation for the UpdateCommand is not supported against a SelectCommand that does not return any key column information"
The pkClaim in the select is the key column. I don't know what I'm doing wrong here.[code]......
I have managed to sort out my date issue however although I have used the same code format on of my tables is not being updated and I am not getting any error msg so not sure why it will not work
this is my code cmd1 = conn.CreateCommand
cmd1.CommandText = "INSERT INTO tenant(t_id, firstName, lastName, email, phone, dob, rentPaid, rent, dateIn, deposit, service, rentDueDate, property, notes, existing) VALUES(@t_id, @firstName, @lastName, @Email, @phone, @dob, @rentPaid, @rent, @dateIn, @deposit, @service, @rentDueDate, @property, @notes, @existing)"
[Code]...
Dim ds As New DataSet
Dim da As OleDb.OleDbDataAdapter
Dim dbProvider As String = "PROVIDER=Microsoft.ACE.OLEDB.12.0;"
[code].....
i can't find anything's wrong but the the program keeps prompting syntax error
Code:
sql = "UPDATE tblclients WHERE Key_Contact_Person ='" & txtclientname.Text & "' SET (" & _
"[position] ='" & txtposition.Text & "'" & _
", [Deptment] ='" & txtDept.Text & "'" & _
[code].....
I'm trying to update a record in MS Access database with the code below. But it says 'Syntax error in UPDATE statement and highlights cmd.ExecuteNonQuery()'.
[Code]...
I'm new to vb.net and its database methods so I'm a bit confused by these datasets and grids and table adapters.
I'm getting:Concurrency violation: the UpdateCommand affected 0 of the expected 1 records.
On this line:frmMain.AccountsTableAdapter.Update(frmMain.DsAccounts)
I have a datagridview attached to a dataset. I also have a button that the user can press to update information in the datagrid based on a website. But I often get that error when it comes to actually updating the table.
nd got stuck with slight problem. i just wonder how can i update a certain column in the sql server database when application forms gets started.This code below updates all the records when forms loads but i need to make it specific one. in this case, i would like to have update button to update/modify the existing one.
vb.net
Private Sub Button5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button5.Click
[code].....
I'm trying to progress my programming abilities by coding in Visual Basic forms. I've created a database and linked that to a VB form, I'm now coding a way to write into the database instead of reading.I'm filling an array which is in-turn put into the dataset row by row however when attempting to 'update' the table adapter I get the following error:
View 1 RepliesI am getting the attached error while updating or deleting the records. [code]...
View 9 Repliesi m having problem while updating my database... In this code when i delete records then it will deleted but it can't show updated data..for viewing new updated data i hav to again open the form ... so is there any code which i miss??? to update database @ runtime??
[Code]...
I have a DataAccessLayer that returns a datatable. The business layer calling it also returns a type datatable.In my form, I call the business layer as a datasource of my gridview and then I binded it.
This codes are working in C# but I have problems when I converted it to VB.NET. During databind it displays the error: Data source is an invalid type. It must be either an IListSource, IEnumerable, or IDataSource.
Can i not bind a datatable in my gridview in vb.net? What do you think is the problem?
When i click on the link button, it does not show the data from DB... if the part i am updating from DB is outside the tabbed panel then it works fine...
<script type="text/javascript">
var hh;
var left;[code]............
I have a code made in Visual.net 2005, and I have a problem. I have an excel file where I store records. I can read this records without problem, but when I want to make a modification I get the ERROR :
"Current Recordset does not support updating. This may be a limitation of the provider, or of the selected locktype"I hope you can help me, I know that by default the file is open as readonly, but I dont know where do I have to specify the opposite.
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i have made a database windows forms application, i can add records, when i add a record , fill out a few fields then save it saves OK but if i then change some fields data then try to re-save i get a error: object reference not set to an instance of an object.
the code that is highlighted is:
Private Function GetRowData(ByVal custRow As calllogDataSet.CALLLOGRow,
ByVal RowVersion As Data.DataRowVersion) As String
Dim rowData As String = ""
[Code]....
All i'm tring to do is connect to my MysQL database on my Local host and update a record in my "customers" Table. The Error i've been getting is under Public Sub DeactivateAccount,the MyCommand.ExecuteNonQuery() line of the code. The error is saying there is "no database selected". Below is the code i have.
Imports MySql.Data.MySqlClient
Public Class FinalFailedPinNumberAttempt
Dim connectionstring As String = "Server=localhost;user id=root;Password=;
[Code].....
I have a for loop going through customers and for each customer a update a list of contacts. If there is an error updating the contacts I want it to move on to the next customer and if there is an error in the customer update I want it to move on to the next customer. At the moment if I get an error it bombs out of the routine. Here is a simple example:-
For iRows = 0 to oledscustomers.tables(0).rows.count - 1
For iContactRows = 0 to oledscontacts.tables(0).rows.count - 1
'make some changes in here.
Next
Update Contact Table
'Make changes to customer tables and save them.
Next
If I get errors in the contact for loop or the customer loop it comes out of the routine altogether. I just want it to either continue to the next contact or customer.