I am trying to see if producttextbox.text (getting ready to be entered) is duplicated in the DB. I have searched and search and typed some code but nothing is working. Code shown is so far the closest.I do get the NO MATCH message box now although it is a duplicate record. At least I know I am getting somewhere...
Public Sub ValME()
Dim dv As New DataView(FSC_DATADataSet.PERS)
dv.RowFilter.Contains(ProductTextBox.Text)
[code].....
For example, is this an acceptable way of checking that fields are not empty before submitting data to a datatable/database? Right now, Im simply checking with an If statement, and I'm starting to think that this is not the correct way to do it.
I'm also trying to learn more about unit testing, so if you have any tips or tricks, please feel free to share.
[Code]...
I'm using a bindingsource to bind a dataset to a datagridview. Normally I would use a dataview to sort and filter the data, but since a bindingsource can also do this, I figured I would not need a dataview anymore. But I'm not sure how to get certain data from the filtered source. I know I can get it from the datagridview, but I'm not loading the entire dataset into the datagridview. I guess I could and then just make the columns I don't need be invisible. Or I could go ahead and use a dataview also, but that seems redundant. I was wondering if there is an equivalent to this code to get a specific item from a dataview, but pulling it from the bindingsource:
tbCode.Text = dv.Item(m_recno).Item("CodeNo")
As long as I'm not filtering the data, I can get it from the dataset, but when it's filtered, the indexes won't match.
i am currently working on a database project using Microsoft Access 2007 and VB Express 2008.my problem is, i want to create a searching function in one of my tables; table Coachee. I know that it is possible to search data using bindingsource.filter as i've already succeeded in doing that. The thing is, how do i actually prompt a messagebox saying that the record of the Coachee ID to be searched is not found? [code]
View 4 RepliesI have added a handler in my code for the bindingsource currentchanged event: I have populated a datagridview. AddHandler PeopleBindingSource.CurrentChanged, AddressOf ChangeHandler then on the ChangeHandler Sub I populate an HTML report. However I don't think this is the best event to handle this. I have to datepickers on my forma as well. So say I click on a row in my dgv, that persons report loads. Then I change the start date on my datepicker,
Now i want to click on that row again to refresh the data, but since the currentchanged event doesn't fire the data won't refresh. I have to click on another row then click on the row I want to view in order for the event to fire. which event is best to do this?
I have a form with a datarepeater that contains various controls (i.e. datetimepickers, text boxes, combobox) that are populated via a binding source. I also have other controls on the form that are not part of the data repeater. I would like to force validating all controls after the data is populated. I have successfully forced validating the non-datarepeater controls using Me.ValidateChildren() at the end of my load event. However, it does not fire the validating events for the controls within the data repeater. I have unsuccessfully tried many different attempts to set and move focus within the datarepeater controls trying to get the validating events kicked off. I am not sure where would be the best place (e.g. in drawItem? in ItemCloned?) to place the code and what it should be exactly.
Here was my latest attempt:
Private Sub DataRepeater1_DrawItem(ByVal sender As Object, ByVal e As Microsoft.VisualBasic.PowerPacks.DataRepeaterItemEventArgs) _
Handles DataRepeater1.DrawItem
For i = 0 To e.DataRepeaterItem.Controls.Count - 1
e.DataRepeaterItem.Controls.Item(i).Focus()
e.DataRepeaterItem.Controls.Item(0).Focus()
Next
I successfully handled the validating events in the data repeater caused by user input errors. However, I have the unusual situation that the data coming into my form is already bad for some of the controls. The purpose of the form is to validate the data coming in to it and from user-input. I am newbie with vb.net.
So I'm developing a Windows Forms Application in Visual Basic 2010. The user searches for data and fetches results, updates fields and some other CRUD operations. I want to provide a user input validation. Usual stuff i.e. some fields need to be always numbers>0, others need to be non-empty in order to avoid Null access on some objects and others just need to be some fixed strings.
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I am writing below code for validating compulsary field account no. in form.User's requirement is set focus back on field when error comes :
If txtAccountNo = "" Then
MessageBox.Show("Account no filed can't be left empty")
txtAccountNo.SetFocus
Exit Sub
End If
It's working properly. But suppose user don't want to fill form and exiting from application.Message box keep on appearing till user enters account no.
I've created a bindingsource like this[code]...
the data. However, I neeed to retrieve user ID and Pwd for a given server from bdsServers. So far I was not able to do this. Googled like crazy
I have a DataRepeater that needs to display individual items from a List (Of T). The missing link between them is a BindingSource component.Everything works fine, i.e., the DataRepeater displays list items correctly, and I can add and delete items, even change using the TextBoxes on the DataRepeater.
The problem is that when I change the value of an item in the code, it doesn't get reflected on the DataRepeater. Only when I click a button on the form which executes this code:myBindingSource.ResetBindings(False)
I have data bound text boxes that loose the entered data in "BindingSource.EndEdit() code. This would seem to violate all forms of logic. I have provide my code below as well as a copy of the debug.print data.
Private Sub SaveToolStripButton_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles SaveToolStripButton.Click
Me.Validate()
ErrorTrap = 0
[Code] .....
I am trying to delete data using bindingsource.removecurrent() ,but using the following code, it's just not working.
CODE:
bsmail is filtered in another form, perhaps the problem lays there? i don't know if the code to remove the current data is correct.
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.
View 3 RepliesI have 3 checkboxes on a groupBox, when the user presses "OK" i was first wanting to validate that at least 1 checkbox was ticked before commencing, if they haven't selected any i was going to throw an error up, i'm stuck on how to do this i'm sure a for each, but i can't seem to figure out the syntax.
View 3 RepliesI am using the following code to populate data in Textbox1:
[Code]...
Bindingsource.position/current. after data been updated
View 8 RepliesI am trying to get my grid to refresh automatically when the underlying data is updated in the database. Isn't this supposed to work? Or am I missing something? I created a DataTable within my DataSet. Then I created a new form and added a DataGridView (actually I'm using DevExpress' XtraGrid but am trying to get it to work with just the Microsoft controls). I use the menu in the upper left of the grid to set the grid datasource to the datatable in the project data source. This then automatically adds the dataset, BindingSource, and TableAdapter to the form.
[Code]...
I'm following advice to load data to a DataTable, binding to a BindingSource then a DataGridView. But some exzamples I've found use a DataAdapter, not a DataTable. [code]
View 3 RepliesIs there a way to prevent the form closing event from executing if validation fails on a control? If validation on a control fails this stops the form from closing, but the closing event still executes. Scenario is user has focus in a text box, tries to close the form. Validation fails, but closing event is fired. I'm not sure how I can abort that event.
View 5 RepliesLets say I have a form with several Textboxes that are all bound to "bindingsource1". I'd like to be able to check the field data type each textbox is bound to. Something like this,
Dim ctl As Control
For Each ctl In frm.Controls
If ctl.GetType.IsAssignableFrom(GetType(TextBox)) Then
[Code]....
I'm trying to flag a record as deleted by clicking the delete button on my bindingnavigatordeleteitem button.
The code is:
Private Sub BindingNavigatorDeleteItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BindingNavigatorDeleteItem.Click
code:.........
The error is "Deleted row information cannot be accessed through the row"
Private Sub LoadMovieDetails()
Try
Dim cmd As SqlCeCommand
[code].....
Maybe i'm missing something, but how can i make my application to save the value that i use to replace the null values that exist in the database?Let me explain i have a form with several textboxs to let the user enter/edit some data. At the first time the user opens the form, the are some fields in the database that are null, so i use one of the overloaded versions of the control.databindings.add(), and set default values for those fields.
My problem's when the user clicks save without changing any of the default values, i can't detect any changes to the datatable, so the update method doesn't update anything.
I have one simple questionWhat's the code for deleting one row from Database using BindingSource and DataSet? Just like from BindingNavigator.
View 14 RepliesI have a dataset (dS), adapter(aD) and bindingsource(bS) I am using in a form. The datasource for bS is dS, and I am filling the adapter in the form's Load event with a table (tbl) from the dataset.
On the form I have a listbox and a textbox with the following properties set
[Code]...
tried in many ways and I know that very soon will succeed. at least I am very resourceful showing that ...... Please help me correct this code. because the DataGridView throws I query the data are in the range of dates
Option Explicit On
Option Strict On
Imports System.Data
Imports System.Data.SqlClient
[code]....
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]
View 7 RepliesI've got a bindingsource that has a datasource of a datatable
capabiltiesBS.DataSource = vendorBAL_C.capabilitiesTable
And that table looks like this
Select VendorId, Capability, LanguageFrom, LanguageTo From VendorCapabilities_T
At any rate - I do this to filter the binding source and then thought I could loop through the datarows and fill a tree view with them
capabiltiesBS.Filter = "VendorId=" & VendorId
For Each cdr As DataRow In capabiltiesBS.List 'vendorBAL_C.capabilities.Table.Rows()
[Code]....
I have work with BindingSource in VB NET 2008
--
dim bsA as new bindingSource
BsA = DB
DataGridView.dataSource = bsA
[code]....
but data has changed this is correct ?I don't wont change this data what I have to do ?
I datagridview and I populate it using a bindingsource. I have the following code in the bindingsources PositionChanged event and it works as I want it to except when I filter the bindingsource.
Private Sub ProductBindingSource_PositionChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles ProductBindingSource.PositionChanged
If (Me.ProductBindingSource.Current IsNot Nothing) Then
Dim dr As DataRow = CType(Me.ProductBindingSource.Current, DataRowView).Row
Dim ProductId As Long = CLng(dr.Item(2).ToString)
Dim ResultId As Integer = CInt(dr.Item(0).ToString)
GetReport2(ProductId, ResultId)
End If
End Sub
The scenario is when I click on a row in my datagridview the bindingsources positionchanged event fires and I load a crystal report. Problem is when I filter the bindingsource, even though the first item in the grid is now different the incorrect report is displayed because the bindingsources position hasn't changed.