Bindingsource AddNew() And CancelEdit() Interaction?
Dec 21, 2011
I think I started out with a misunderstanding of what happens with addnew() and canceledit().
I have a strongly typed datasource in memory.
I call bindingsource.AddNew()
Later I find that the record the user was trying to add already exists, so
bindingsource.CancelEdit()
I have not set any properties other than datasource on the bindingsource.
My assumption was that the CancelEdit() would rollback the blank row added by the AddNew(), but I'm getting some odd errors which lead me to believe this is not true.
Could someone verify that CancelEdit() leaves the new row?
I have a problem with bound controls and a bindingsource. I'm using vb 2008 and .net 2.0.I have a few text boxes bound to columns in the binding source.The backend is a Access database.
I'm using a bindingnavigator to add a new record.The additem event works fine.If the user clicks an icon to cancel edit, the code executes bindingsource.canceledit. This seems to work fine. The row count on the navigator returns to the correct number before the addnew event occurred. However, the bindingsource seems to have an empty record in it. As the bindingsource navigates, it eventually gets to the empty record depending on where it's position was when the addnew event fired.
The error received is an invalidcastexception. This error occurs because the record is repostionedand each time this occurs the code performs calculations using values from the bound controls.But when it navigates to the empty record, the values in the bound controls are null.Is there other code besides canceledit to remove the empty record?
I would like that someone show me (with code) how to add a new row to a bindingsource. The same thing that the bindingNavigator does but writting myself the code.The fields of the table appear in the form using TextBox. When I click the button "ADD NEW", the textBox must be cleaned and must be ready to introduce a new row.
Im using a bindingsource to add new records to my db using bindingsource.addnew()When this is evoked, it seems to automatically increment the recordcount and then blanks out the content of every bound to that tables bindingsource. So that all fields in the new record have to be filled in manually.I would like to be able to pre-fill some of the data in the new record. for instance, when a user adds a new record, have a specific column in the new record automatically populate with the selectedvalue of a combobox.I assume this means I may have to manually code up my own addnew routine, but google has let me down on where to start.
I'm trying to fill some textboxes programmatically after clicking the bindingnavigator add button but the textboxes wont fill..Using the listchanged event of the bindingsource doesnt work neither..[code]
in my form_load sub i added a line to enter a new row when the form is loaded by using me.bindingsource.AddNew()Is there anyway i could tell it to only add a new line only if the rows are empty, the table does have a primary key column where its seed is 8000 i dont know if this would make a difference to how you would make it work
Private Sub BindingNavigatorRevertItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BindingNavigatorRevertItem.Click Me.GpheaderBindingSource.CancelEdit()
[Cdoe]....
My problem is Me.gpdetailbindingsource.canceledit() cancels only the current row being edited. I want all rows of my detail be reverted.
what is the substitute for ADDNEW function in VB5 at the newest VS2008 their there was just recordset to which u apply this function then allwing u to add a record to a data base?
Saving data from textboxes to a dataset Default Values - Binding Navigator But i could not do it or didnot understand how to do it. I have a Binding Navigator created by the wizard, I want to put a value "A" in a Textbox when adding new record (press +). I had tried to use this code in txt_site_GotFocus and BindingNavigatorAddNewItem_Click
I need to insert values into a text-box in a database form, after a 'Add new record' event has been executed
If i code the 'add new' button click event on the binding navigator my code is run first before the record is inserted. This over rights the displayed record then the new record is inserted. Where can i place my code to run after the record has been inserted
I am trying to use a bound datagridview and through the add button on the bindingnavigator adding a new row to the bindingsource and then pass two variables to the datagridview in the new row so they can be associated with the proper ids. I then have a save button for when the end user is done inputting the rest of the data for that record.
The code is below:
Private Sub BindingNavigator1AddItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) AddressesBindingSource.AddNew() AddressesDataGridView.CurrentRow.Cells("caseNumber").Value = Me.CaseNumberTextBox AddressesDataGridView.CurrentRow.Cells("interestID").Value = Me.InterestIDTextBox End Sub
I am attempting to convert and Access CMS to VB and possibly vb.net.
I have a text box which I'm saving to a database. Before doing a addnew which add a line to the database with a Id number and a blank item, I wish to test the textbox for actualentry before. Here's code I'm tryin
I'm trying add a new row to my databaseTo add a new record a pop up form opens (form2) with a textbox for the user to input their name, they then click the save button and the popup form closes and the main form (form1) is still showing and the added row seems to updated in combobox although it is blank!.This causes a new blank row to be added to the database - the data in the textbox is never saved to the database
vb Private Sub btnSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSave.Click
I'm using a dataRepeater which is unbound to a list of Objects ( as I need to have two types of object in the dataRepeater).I'm using the following code to populate my dataRepeater
Private Sub loadDeviceDetails(ByVal owner As Mi2.MiOwner) ............ Dim listDevices As New List(Of Object) Dim c As Integer = 1
[code]....
For some reason the first drawItem runs once, as expected. therafter it runs twice for each new item that is added to the dataRepeater.
My problem with AddNew. It really is somewhat simple, but I can't figure out the solution. I have a form where I show a list of my rows with a given a table. The user can then select a row and press clone, which then will try to make a copy of that row.
Here is a snippet:
Dim rowToCopy As cmaDBDataSet.cmaPropertyRecRow Dim originalID, newID As Integer rowToCopy = CType(CType(Me.CmaPropertyRecBindingSource.Current, DataRowView).Row, cmaDBDataSet.cmaPropertyRecRow) originalID = rowToCopy.id ' id of row to be copied
[CODE]...
.... and continue to copy the rest of the data to the newrow...One of the items in the row is obviously a primary key called id. I can not copy this data since I am creating a new row. My problem is, how do I set that value!? or atleast retrieve the value for the newly added table. I need that value so that I can call another form to actually allow the user to modify this newly cloned data. I tried using EndEdit, UpdateAll, no worky. THen I thought I could assume that the newly added row would go at the end of the table so I used MovedLast then got the currentRow id from there... That worked well until we did some deletes within the table.
Can someone help me i am trying to add and save customers to my database and it doesnt seem to be letting me unless i directly go into the grid and add them there. You can see that the addnew button adds them but it wont save them. when i go back and preiview the data on the table its not there. I am just tring to develope a regular simple customers database
I was wondering if it is even possible to interact with other websites using my own.Here is the scenario: Lets say I have a Lockerz account, which is a place where you do daily tasks to earn points. Once a month you can redeem those points to get prizes such as an ipod, macbook, or other items. I know that sounds rediculous, but stay with me.
For someone to gain membership to this website they must be invited by a member. So I get your email address then log in to my account, then send you an invite from there.What I want to do is create a website where a user enters their email into a textbox and presses a submit button. From there the program, behind the scenes, sends my login information, and the users email address to lockerz and sends the invite. All without ever leaving my site.I have worked with ASP.NET with VB codebehind for a while now, so I understand the basics of that. I am just wondering if what i want to do is even possible.
I have two following rows of code:Microsoft.VisualBasic.Interaction.Beep()or Microsoft.VisualBasic.Beep()The result is the same in this two rows.what is Interaction class?And when shold i use it?
I am using VB within the Visual Studio 2010 platform.I have created a simple Database with Access.I have connected my database to my VB 2010 project using the Visual Basic BindingNavigator object.I now need to navigate my Database with code from within VB 2010.
1) More specifically I need VB routines that allow me to:
· GoTo first record · GoTo a specific record · MoveDown one record at the time and sense the EOF.
2)I need to add new records at the end of my database as data become available through a change in four text boxes.
3)I need any other VB 2010 statement or routine that might apply to Database navigation and communication from within VB 2010.
My Database consists of four columns: Date, Time, Bid (Double Integer), and Ask (Double Integer), and was created with Access.Is Access the best solution for creating a Database today?
I would like to prompt the user, in the middle of a VB program, either with MsgBox or any other dialog, to input data in a worksheet of the Workbook that contains the code and then, on some event, read the data and continue execution. I was not successful with MsgBox (and other forms) since it is modal. The user cannot get focus on the worksheet, input data and then continue execution by clicking a command button.
In the application I'm actually building, I'm dealing with two dynamically-added controls that need to interact with each other, but I've reduced the problem to an as-simple-as-I-can-make-it example with the controls being statically loaded, and it still presents the same problem: a NullReferenceException when invoking the delegate. Here's the gist:
Control 1 Partial Class Control1 Inherits System.Web.UI.UserContr
I have set up a scrollbar to have a value between 0 and 264 (i.e. 0-255 when taking the width of the slider into account). I also have a text box that is set up to display the current value of the scrollbar as an interger. However I am currently unable to enter a value in the text box which also moves the scrollbar to its equivilent position. The closest I've been is when I was able to change the value but kept ending up with an error when a number above 255 was entered or when there wasn't a number in the text box.[code]What I am after is to be able to enter a number between 0 and 255 (and only a number between 0 and 255)in the text box and it change the position of the scrollbar accordingly and to omitigate the errors which occur when there is nothing in the text box by accepting an empty box as 0.
On my program the user clicks a button which then runs the main code for my program. The problem is once the code is executed I can no longer move or interact with any form boxes, reliably at least . Sometimes there will be a period of delay where I can move it for an instance. Is there anyway I can make it so that my form is able to be moved while the program is running?
I've been studying design patterns off-and-on now for a project I've recently been working on. I've been fortunate with this last one not to have to work with databases, but will soon have an opportunity.
