Catch DataTable RowChanging Event When Using TableAdapter.Insert Method
Apr 19, 2011
I setup a strongly typed dataset using the DatasetDesigner in VB2010. I am using the TableAdapter.Insert method to add data to an Access table. Before the data is inserted I need to validate the data using the DataTable RowChanging event.
How can I get the DataTable RowChanging event to fire when using the TableAdapter.Insert method?
Here is an excerpt of code I have so far:
When the Insert method runs, it does not fire the datatable RowChanging or NewRow events.
Imports System.IO
Imports System.Data.OleDb
Imports System.Data
[Code]....
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Aug 6, 2010
I am trying to add NewRow to the database by using datatable in dataset, but before I do that I want to make sure that row is not already there. I create new row for the datatable I am working with, fill it with information. I fill datatable with the row from database that has the same primary key as my NewRow by using tableadapter.fill method, but when I do that my NewRow that was never added to the datatable is filled with information from database(and not information that I assigned to it). I count rows in my datatable before I fill it and it's 0, so why is my NewRow affected by Fill command? (I am using VB.NET 2005 Framework 2.0)
[Code]....
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Apr 1, 2011
i have problem when i click a ADD button, there is one null value in the textbox .. so the try catch statemnt is to catch that null value error but after that the catch is success but the button click never stop excute the statemnt till the end of the button event.
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May 28, 2009
I need to explicitly load my data source variables and then call the insert method associated with the data source. The sample VB .net code is listed below. So is it sufficient for me to just call the Insert() method when I am ready to insert my values? Or do I need to create an insert event? You see if I look at the properties window for the data source, there is a lightning bolt icon that will generate events for the data source such as Insert,Inserting,Disposing,Init,Load etc.
Protected Sub btnSave_Click(ByVal sender As Object, ByVal e As System.EventArgs)
Me.SqlDataSource1.InsertParameters.Add("@Title", "Mr.")
Me.SqlDataSource1.Insert()
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Mar 3, 2009
Visual Studio 2008VB.NETFramework 3.5Windows Application
I have a SQL database names TestSQLVB
In it a table called tblTest2, with a three fieldstest2id , int, pk, increment by 1field1, varchar(50)field2, varchar(50)
I have a dataset named Dataset2.xsd
A tableadapter named tblTest2TableAdapter
A insert query names InsertTest2 with fields @f1, @f2 and ExecuteMode = Scalar
When I run the following code per MSDN [URL] the database does not get updated.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim testds As New DataSet2TableAdapters.tbltest2TableAdaptertestds.InsertTest2("One", "Dog")
End Sub
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Oct 23, 2009
I would like to start a data base. Im using vb2005. I've started a new windows application. I have added a new data source to the project. Then I added a new TableAdapter in the dataSet.xsd part of the project. When I'm completeting the wizard, when I click on the QueryBuilder, when the add table window opens, the table already in the program ( that comes along with the TableAdapter ) isn't recognized. I've clicked on the refresh button but it still isn't recognized. (example: DataTable1 isn't recognized in the add table form in the query biulder of DataTable1TableAdapter)
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Jan 10, 2011
I am a veteran programmer . However , I am new to visual basic 2010 . I am trying to create a database that ould store data within an access file *.mdb .I have created the database which includes multiple tables . moreover i have created app.config file using wizard and my database along with dataset appear in the visual basic 2010 project . moreover when i test the function insert in the dataset the function performs well and the output is correct and i can see the new row added in my access database . however when i try to use the ATLtableadapter.insertquery (ATL is a datatable in my database) function in my form (in view code) the row doesn't get added.
When i first used this function an exception occured was something like first system class exception data.dll something along that lines. . however , when i created a new oledb.oledbconnection and put its connection string as the one in windowsapplication1.my.settings.marketconnectionstring. and used the open comand to open a connection . the message stoppped appearing . however , the insertquery is not adding the row in my database still when i use it in the form.
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May 25, 2011
I have a dataset that fills a tableadapter and I'd like to be able to post changes made to the dataset to a database with a date marking the changes. I've never used the TableAdapter.Update method before and was wondering if someone has any good tutorial links for that method. Here is the
[Code]...
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May 24, 2011
I have a dataset that fills a tableadapter and I'd like to be able to post changes made to the dataset to a database with a date marking the changes. I've never used the TableAdapter.Update method before and was wondering if someone has any good tutorial links for that method.
[Code]...
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Oct 6, 2009
I have a program that is using a dataset class, table adapter, binding source and binding navigator. The program can read, update, and delete rows from the table. However, it doesn't recognize new records and save them to the database when the table adapter's update method is called. (table was pre-populated by another process) The database table is using an identity column for the primary key. On a whim I added code to force an insert of data using the table adapter's Insert method with some hard coded values and this worked.This code was invoked after hitting new record on the binding navigator bar. Looking at the database, I notice the record I forced in skipped an identity value, which indicates to me hitting new record took the previous number. So the question I have is what would keep the tableadapter from inserting the new record when its update method is called?
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Jan 6, 2010
The GUID is the SelectedValue of a ComboBox (cbNetwork) If I execute a Debug.Print on the cbNetwork.SelectedValue, I see:
645b9d20-23eb-469e-9faa-e287600a54f3
However, when I try to execute the Fill method of the DataTableAdapter, I get an error "Specified cast is not valid."
[code].....
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Jul 7, 2011
I have a TableAdapter I created in the DataSet designer. It contains joined tables and I set it up to automatically generate Insert/Update/Delete commands. I understand that I have to write my own UpdateCommand. I did so, in the DataSet Designer, for this particular TableAdapter.
The issue is that the Update Method is not showing up via IntelliSense, when I attempt to write code like this:
vb.net Dim x as Integer = Me.DPTableAdapter.Update(), IntelliSense does not show the Update Method with the parameters I set up.I created the same exact method with another TableAdapter, in the same manner, and it worked just fine.
I also call EndEdit on the BindingSource, I just did not put it in this post.
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Jun 12, 2011
For a project from skool, I been in charge of development, and we already have the system, but they wanted to add images to the project, and since i been using the TableAdapter.Insert commando to add records to the database, I need to know how to send an Image with that command.
Here is my code
EmpTableAdapter.Insert(noemp.Text, nametb.Text, area.Text, DateTimePicker1.Text, "", "Active", "", HERE GOES THE IMAGE )
[code].....
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Mar 21, 2011
I have a question similar to this one, but reading the (accepted) answer didn't give me much insight, so I'm hoping to state it more clearly and get a clearer response back.
I'm attempting to insert a data row into a table. I'm using TableAdapter's custom "insert nonQuery" that I wrote (it works, I tested) to accept some parameters. I'm fairly new to this business of communication with a database via .NET and what I'm doing is probably wrong by design. My questions are why is it wrong and what's the right way to do it? Both are equally important, IMO.[code]...
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Apr 11, 2011
I'm using the TableAdapter to Insert rows into a database, when I use execute from the Query Builder, the line gets entered into the database, when I enter it via Form button, it doesn't get entered to the database using the same commands.
[code]...
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Jan 11, 2011
Whenever I create a table adpater the wizard does not create and update command. It creates Select Insert and Delete but no Update command. I have a primary key in the data and have completely deleted my dataset and created connection and table adtaer from scratch with still no update command wizard says it will create it but does not.
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Jan 17, 2012
I have already defined in my SELECT statement in TableAdapter to tell it what to do if the parameters are Null:
SELECT a.ID, a.NameID, b.BNameID
FROM a INNER JOIN b
ON a.ID = b.ID
WHERE ((@NameID IS NULL) OR (a.NameID = @NameID))
AND ((@BNameID IS NULL) OR (b.BNameID = @BNameID))
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Nov 20, 2011
I was working through Beth Massi's article, "Using TableAdapters to Insert Related Data into an MS Access Database" here: http:blogs.msdn.co...s-database.aspx
And I configured the TableAdapter exactly as shown by Beth, yet I am getting an error here:
Me.OrderDetailsTableAdapter.Update(newOrderDetailsRow) The Error says: "You must enter a value in the 'OrderDetails.CustomerID' field."
I am using this code for inserting a related record:
Namespace MyDataSetTableAdapters
Public Class AccessIDHelper
'<summary>
[Code].....
I am not able to insert and move on as I am getting the error marked above.
What could be possibly wrong with the above code and why is this giving an error ?
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Jan 4, 2010
I have a situation in which I must execute a dynamically built stored procedure against tables that may, or may not be in the database. The data retrieved is then shunted to a VB.Net backed ASP based report page. By design, if the tables are not present in the database, the relevant data is automatically hidden on the report page. Currently, I'm doing this by checking for the inevitable error, and hiding the div in the catch block. A bit kludgy, but it worked.I can't include the VB code-behind, but the relevant stored procedure is included below.However, a problem with this method was recently brought to my attention when, for no apparent reason, the div was being hidden even though the proper data was available. As it turned out, the user trying to select the table in the dynamic SQL call didn't have the proper select permissions, an easy enough fix once I could track it down.First and foremost - is there a better way to check for a missing table than through catching the error in the VB.Net codebehind? All things considered, I'd rather save the error checking for an actual error. Secondly, is there a preferred method to squirrel out a particular OLE DB error out of the general object caught by the try->catch block other than just checking the actual stack trace string?
SQL Query - The main gist of the code is that, due to the design of the database, I have to determine the name of the actual table being targeted manually. The database records jobs in a single table, but each job also gets its own table for processing data on the items processed in that job, and it's data from those tables I have to retrieve. Absolutely nothing I can do about this setup, unfortunately. [code]
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Sep 12, 2010
When trying to use Try/Catch in my code the INSERT statement does not work, but when I comment out the Try/Catch it works fine with no error. The section of my code is below:
[Code]...
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Oct 19, 2011
I would like to catch any exceptions from any method in a class so that I may record class specific data to the exception for logging before it is passed up the stack. I know that I can put a try-catch in every method of the class, but there are many methods and It seems there should be a more efficient way. Example of what I am currently doing:
public class ClassA
{
private int x;
[code].....
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Apr 28, 2011
Is it possible to get the text of every msgbox that is opened in the application, when the msgbox is launched.
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Feb 7, 2012
I am using the DataSet to test for data errors on a DataGridView (to give the user feedback before they save changes back to the database). RowChanging event has the code at the bottom and this manages error messages on the DGV via an ErrorProvider. I want to add something to this code that esnures there are no duplicate rows (it's a 2 column table and one of those is the autoincrement PK). However I cannot work out how to do this and since the column in the database is set to Indexed (No Duplicates) it will throw an Ole error if I don't handle it, I could manage it in a Try block around TableAdapter.Adapter.Update but would prefer not to add needless round trips to the DB when it really ought to be simple to do it in the code (and preferably in the DataSet, not the form).
I found the following code (Forum Post) and try as I might I can't make it work since I can't get access to a DataTable within the RowChanging event that allows me to run DataTable.Rows.Find().
Dim expression as String
Dim matchingRow as DataRow
matchingRow = Mytable.Rows.Find(expression)
In my case:Mytable would be some kind of reference to the table / dataset etc.
'expression' would be e.Row.compclass.ToString
* a reference to the database table the form works with (bearing in mind that this code is in the DataSet not in the form). I've tried properties/methods of the DataSet itself; creating a new DataTable and linking it to the DataSet Table (or DB Table); creating
a new DataTable and loading it with the table contents - Searching MSDN and the forums hasn't popped anything up yet.I'm currently experimenting around this code:
Dim strCompClass As String = e.Row.compclass.ToString
strCompClass.Trim()
Dim foundRow As DataRow = ???.Rows.Find(strCompClass)
[code]....
This is the current code in the RowChanging event. The new code would be inserted after the last End If in the code below.
Private Sub ref_compclassDataTable_ref_compclassRowChanging(ByVal sender As System.Object, ByVal e As ref_compclassRowChangeEvent) Handles Me.ref_compclassRowChanging
If e.Row.HasErrors Then
[code]....
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Jul 26, 2009
I want catch control + C system Event through by VB.Net means i devolped one project in VB.NET. In my project one search textbox if my project is minized and some word or else document opened and if user press control + C system event do then my minimized project open and selected word (means those word you select ) see in my search textbox.
<input id="gwProxy" type="hidden"><input onclick="jsCall();" id="jsProxy" type="hidden">
<div id="refHTML"></div>
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Feb 21, 2010
How do I catch the new added datarow event? I'm using a dataset and bindingsource. I've tested Bindingsource's ListChanged event but it is a bit problematic. For example when I use those codes in the ListChanged event:
If e.ListChangedType = System.ComponentModel.ListChangedType.ItemAdded Then
MessageBox.Show("Record was added..."
End If
... records are added twice. If there is an another event for it?
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May 11, 2009
I just want to know if there any equivalent event (ADO. NET VS 2008) event as in MS ACCESS Form's OnCurrent Event.The reason is I like to make some calculations based on some data bound controls with current datarow data when user clicked a row in DataGridView (or by using bindingNavigator). I've tried with DatagridView's RowEnter event. But some Data bound controls are not yet reflect the data of current datarow when that evet was fired.
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So basically I have a ComboBox on a form, which I populated by adding custom object named "Category" and by setting the DisplayMember to the property "Name" of my object.On another form that can be opened at the same time, I can edit the name of theses "Category" objects. I raise an Event, "NameChanged" but how can I catch it on the form which contains the ComboBox? Even if the property "Name" of the object "Category" change, the display on the ComboBox doesn't autoupdate. So I need to catch the event, but I don't know how to do it.
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I want to move certain controls on a form when the webbrowesr controls' vertical scroll bar is scrolled. but there is no scroll event defined for the webbrowser control in .NET I am using Visual studio 2008 and VB.net.
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Apr 22, 2010
A developer has created a custom control in ASP.NET using VB.NET. The custom control uses a repeater. In certain scenarios, the rpt_ItemDataBound event is encountering a data error. My goal is rather than having the user see the yellow screen of death, give the user a friendlier error explaining exactly what the data error is. I figured I would be able to use a Try/Catch block as shown below throw the exception, however, it appears that the event has nowhere to be thrown to and stops executing at the "End Try" line.
Protected Sub rpt_ItemDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.RepeaterItemEventArgs) Handles rpt1.ItemDataBound, rpt2.ItemDataBound
Try
ProcessBadData...
Catch ex As Exception
Throw ex
End Try
End Sub
In VB.NET, I can find where the repeater's DataSource is being set, however, I can not find a DataBind event. How I can capture the exception in this ASCX control so I can report it to the user. The stack trace looks like this. There is another repeater within the repeater that is actually causing the error (rptOther) and I'm able to catch the error, but I can only throw it to the rpt_ItemDataBound. How rpt_ItemDataBound is getting called without a DataBind event.
at Company.WebForms.Control.rptOther_ItemDataBound(Object sender, RepeaterItemEventArgs e)
at System.Web.UI.WebControls.Repeater.OnItemDataBound(RepeaterItemEventArgs e)
at System.Web.UI.WebControls.Repeater.CreateItem(Int32 itemIndex, ListItemType itemType, Boolean dataBind, Object dataItem)
at System.Web.UI.WebControls.Repeater.CreateControlHierarchy(Boolean useDataSource)
at System.Web.UI.WebControls.Repeater.OnDataBinding(EventArgs e)
at System.Web.UI.WebControls.Repeater.DataBind()
at Company.WebForms.Control.rpt_ItemDataBound(Object sender, RepeaterItemEventArgs e)
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