I followed an example from a VB 2008 Wrox book on creating, binding and updating a data set but I am having a problem. The code is supposed to automatically generate the update/insert/delete statements for me (according to the book) but when I call the update command, the data is not saved.
Here is my code
Code:
Imports System.Data
Imports System.Data.SqlClient
Public Class FrmAddExpenses
[Code]....
After the form is loaded, I change the EntryDate field (which is a DateTimePicker) and close the form which should save the change but it doesn't work.
how do I set up create Insert, Update and Delete commands for your a DataAdapter?I'm using a DataGridView to allow the user to view, change and delete data rows and would like to be able to save any changes made in the grid back to the database.The application is part of one I'm developing for our local school to write reports to report cards for the children.[code]
I have a gridview that is set to a sql datasource, it is generating the columns automatically. If I add a column to the table it is referencing, it will draw that column and display it, but it does not update the insert/update commands to include the new column. Is there any way have it rebuild those commands automatically?
I'm trying to insert and update from a table in MSAccess I've declared everything: Connection, DataAdapter and Commands.I didn't use the Command Builder instead I supplied my own Queries.My problem is if I add three rows to my table all the three rows in my database have the same values from the first row. It seems like the parameters are stuck on the values from the first row. [code] I'm using a DataTable with my DataAdapter since I'm dealing with a single table.I'm filling the table with a parametrized query, and updating it with the same dataadapter.I'm adding rows to my datatable and manipulating the table through code. I know that my data is there and every row has it's own values, I can see them when I debug my program.
I am not sure if I can do update, delete and insert in one form. The problem is that in this one form I have 3 textbox and 1 combobox which the user have to enter each column and click on the submit button which is for insert. So how can I do this with delete and update.
i'm querying 2 tables from an access 2007 database + i've worked out the SELECT statement which works ok:
vb "SELECT a.id, a.number, a.subjectName, a.years, a.birthYear, b.note FROM Table1 AS a INNER JOIN Table2 AS b ON a.id = b.id"
now i need the insert, update, delete commands. i'm using parameters:here are my insert, update, delete commands for a single table. how should i modify them to work with the 2 tables as shown in the SELECT statement?
vb "INSERT INTO Table1 VALUES(@id, @number, @subjectName, @years, @birthYear)" vb "UPDATE Table1 SET id = @id, [number] = @number, subjectName = @subjectName, years = @years, " & _
I have a datatable populated from an SQL Server 2008 database table. I created a DataAdapter with a commandbuilder to manage the updating, inserting, and deleting of records. The Updating and Inserting work as expected. However, Delete does not. The code runs through just fine without any errors. The number of records in the datatable after the row is deleted even reflects the deletion. The DataAdapter.Update works fine without any exceptions. But when checking the actual table in the SQL DB the deleted record is still there.Here are the parts of my code that deal with this table.
I am using UltraGrid for inserting data in table. The problem is that i need to do insert,update, delete with web service. I am getting dataSet from web service and display it into grid but when I do some changes on the grid for example insert or update data, I need also to send new dataSet to web service so that web service do update data.
I'm developing an application for my ping SQL Server 2005 as database and VB.Net 2008. Ive created the form and successfully connected all text boxes etc. Using the code, I have managed to open the database and fill the dataset. However when I BIND the Datagrid datasource to the Dataset, I can only see the COLUMN NAMES in the datagrid and not the rows or the data. How to Insert, Update and Delete data. I'm fairly new to VB.Net but I have used VB6 before
Private Sub cmdAdd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdAdd.Click Dim con As New OleDb.OleDbConnection Dim dbprovider As String Dim dbsource As String Dim ds As New DataSet [Code] .....
How to Insert, Delete and Update Data in a Datagridview using MySql as the database? There is a textboxes and button that adds data in the database and i want it to be refresh the datagridview.
I'm creating a project using Microsoft Access 2007 & Visual Basic 2008.I have two tables in my database, Staff and Training Attended. The Training Attended records of Staff are displayed in datagridview, residing in a different form from the Staff detailsWhat my program does is, it will display all of the Staff's list of Training Attended in datagridview once I click the button in Staff form. I've succeeded in retrieving the records. using bindingsource.filterThe problem is that I can't insert/update/delete records in the Training Attended datagridview. it keep giving me this error: Update requires a valid UpdateCommand when passed DataRow collection with modified rows.
currently i am working on a project in which i am using datagridview control. if I enter key value in cell than remaining data of that particular row fetch automatically from data base. how? how to delete as row in datagridview? how to update a row in datagridview?
I am having Syntax Error problem with the Insert and Update statement on using VB and Access that is having an AutoNumber that works also as Primary Key, the below is my code for it. I can do the insert if there is no Auto Number but if it does have, my code is not working. For my delete, when i RUN the below code, it wipes out all my my data inside my
Update Dim strsql2 As String = ("update visa_block set(@utilized, @balance) where @id")
I've just switched from classic ASP to .net and I always used the following to SELECT, INSERT, UPDATE and DELETE from my MySQL databases:
' Create db connection Function dbConn() Set objConn = Server.CreateObject("ADODB.Connection") objConn.Open "driver=x;Server=x;Port=x;Option=x;Database=x;Uid=x;Pwd=x"
I have a GridView that is tied to an EntityDataSource. Most columns are normal bound columns, but two are itemtemplates. When I attempt a delete on one of the rows I receive the following message:
"A property named 'Building1.building_name' was not found on the entity during an insert, update, or delete operation. Check to ensure that properties specified as binding expressions are available to the data source."
I'm not sure how it is possible that this isn't available, since it displays the element just fine when I'm just viewing - it just throws the error when I attempt deleting a row?
I have created a test application to display data in a datagrid, using the Dataset Wizard per the help. All fine - data is displayed.
I then added insert, delete and update queries by selecting Edit Dataset with Designer, selecting the table and adding a query for each action via the TableAdapter Configuration Wizard. In Advanced Options, all boxes are checked, and on the last screen of the wizard it says it has generated SELECT, INSERT, UPDATE, DELETE statements, table mappings, Fill, Get and update methods. The TableAdapter shows four entries: Fill, GetData(); DeleteQuery; InsertQuery; UpdateQuery. On the DataGridView Tasks page, Adding, Editing and Deleting are checked and the data preview shows data.
When I run the application, I can update, add and delete data, but this is not saved.
i am using one combobox and displaying all the emp name available in my database.i have one text box and one button .if i press on button one emp record will be deletes from mytable.then if i click on dropdownlist of combobox i want to display updated result how?
I am trying to do simple insert, update, delete, select statements within VB .NET to access a MS Access database. I have tried all kinds of solutions offered on the web and while the code seems to work, no rows are inserted. Also, I have tried, unsuccessfully, to use the Try/Catch to see if there's an error with no success. I have attached the versions of VB .Net and MS Access I am using: Here's the code:
I am using this code to Add rows to a SQL database, and it adds the row to the SQL database if column 7 is not null. After it adds the row to the SQL database, it deletes it from the Access Dataset, and updates the Access Database. Sometimes double rows seem to get inserted into the database, so I'm thinking there is an error in my logic somewhere here.
Dim rowcount As Integer = AccessDataSet.AccessTbl.Rows.Count Dim y As Integer = 0 For x = 0 To rowcount - 1 txtRow = AccessDataSet.AccessTbl(y) If IsDBNull(txtRow(7)) = False Then [Code] .....
I am writing an encryption application that requires a 64 bit key. I am currently using the following code to automatically generate a key.
Function GenerateKey() As String ' Create an instance of a symmetric algorithm. The key and the IV are generated automatically. Dim desCrypto As DESCryptoServiceProvider = DESCryptoServiceProvider.Create()
[code]....
I am wanting the user to create their own key. Can I convert a user defined password (a string) into a 64 bit key that can be used?
I've run across some VB.NET code that explicitly creates three GUID constants and uses them in a class's ComClass attribute. I've written COM-aware classes in the past just by checking the "Make COM-Visible" and "Register for COM interop" options in the project options. Is this explicit code simply unnecessary, or is it doing something above-and-beyond what those two options do? Here's a snippet:
<ComClass(MenuHandler.ClassId, MenuHandler.InterfaceId, MenuHandler.EventsId)> _ Public Class MenuHandler Public Const ClassId As String = "A2204623-A902-44d4-B524-FDFFCD176E53"
I am making a project on cyber cafe and I want to generate username and password automatically on different clicks. I am using txtusername.text=cstr(int(rnd()*1000)) It gives random numbers but in a same sequence like whenever I run and click on generate button it shows 973 again click 950 again click 939 But when I close my program and again running program then same sequence starting from 973 973 again click 950 again click 939 So I want codes for generating random string or integer without repeating sequence after programme closing again and again.
I would like someone to modify the following code to save data to generate the primary key for each record automatically. In the database,the ID column is the primary key and the Is Identity is set Yes.
i am using visual studio 2005 and database sql server 2000. i want to read table of database and readed data insert in temporary table again update that inserted record.
