Determine Data Field Bound To A Textbox?
Jun 17, 2011Assuming rnameTxt is a textbox and is bound to a field is a DataSet named "TableData".
rnameTxt.DataBindings.Add(New Binding("Text", TableData, "Customer.rname", True))
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Check If A Field In A Data Table Is Null Before Creating A Textbox Bound To That Field?
Feb 24, 2010I am building a data based application using VB 2008 an SQL Express. I need to create textboxes on my form using code, (With & End With) method. I need a simple code string that will allow the app to check if the field to wich the textbox wil be databound is Nul, If so the textbox will not be created.
View 8 RepliesCan't Delete Date Field In Data Bound Form
Oct 15, 2009I've been working on this for some time and I'm surprised that no one else has had this problem. I have a databound form with multiple date fields. I cannot delete a date field once it has been populated. I can change the date, but that is about it. Once Clearing the field i cannot lose focus of the textbox or even close the form. I have read one article on this but it does not seem to be working. The below code I have found. how to get the field to allow nulls? This is not an issue with the table not allowing nulls either.
[Code]...
VS 2008 : Data Bound List Box, Displaying Data Into Textbox?
Jan 3, 2011I want it so every time I click an ITEM in the Listbox it displays ALL the data into the textbox. I know there's an easy way using table adapters and binding the listbox, but I'd prefer to do it this way for my project.
So this is what I got.
Lst.DataSource = ds
Lst.DisplayMember = "tblStudent.FirstName"
Lst.ValueMember = "tblStudent.StudentID"
[code]....
It only adds the first rows details to the text box when I click the second record the first rows details are still there.
Get Database Data Type Of A Bound Textbox?
Apr 18, 2010Is there a VB.net function that tells me the data type (e.g., DateTime, Integer, Varchar) of a bound textbox?
View 4 RepliesEvent Is Fired When A Data Is Loaded Into A Bound Textbox
Mar 23, 2009created a control inheriting a textbox. it is used to format a datetime data. i created a custom property DateTimeFormatMask which is "MM/dd/yyyy" by default. problem i'm having is that when datatable is filled by adapter and the textbox is populated with the data, it is not formatted..i placed the codes that formats the data in the Validating Event which doesn't seem to be triggered at this point.below is my code on my
View 4 RepliesAccess To Bound Data Items From A Textbox / When Text Box Is Not On Form
Dec 20, 2010In my application, I have a data bound form using a binding control (built by the wizard). The application has one primary data screen plus a few more on tabcontrol subscreens.Picture for example that the tabcontrol has two tabs, tab1 and tab2.When the form is displayed, tab1 is visible.Now picture the form or window split in half the top part of the form has a few textbox controls bound to the data and there are a few textbox controls in the lower half of the screen on tab1 of tabcontrol1.There are a few textbox controls on tab2 as well.When the form displays, I can access any of the .text properties of any of the textbox's that I can see on the form and in tab1 of the tabcontrol.BEFORE tab2 is chosen or even, I need to get some of the data from the .text property on a textbox control that is on tab2.I have tried to get the data but as far as VB is concerned, it does not appear to be there UNTIL tab2 is displayed.
To prove this, I put a command button on the form and it simply does this: MSGBOX (mytext box33. text)mytextbox33 is a databound control on tab2 of the tabcontrol1.tab2 is not in focus and apparently, neither is the data.how can I read the .text property of a textbox that is on a form but the form (or tab) is not in focus?
Change A Property Of Data Bound Textbox On Start Up Of A Form?
Mar 12, 2009I am trying to change a property of a data bound textbox on start up of a form and each time a new record is navigated to. I can't find the a good event to attach this action to.
View 2 RepliesC# - Determine Which DataRow Bound To DataGridViewRow?
Oct 25, 2010When I use a DataTable as a DataGridView's DataSource, I often have to find which row(s) a user has selected and read specific values from the DataTable (not the DataGridView). I wanted to know if there is any reliable way of determining which DataRow a DataGridViewRow is bound to especially when the user has sorted the DataGridView on a column other than the default order.
Currently, I use code of this sort:
Dim sorting = ""
If DataGrid.SortOrder <> SortOrder.None Then
'get the actual row if the results are sorted'
sorting = "[" & DataGrid.SortedColumn.Name & "]" &
[Code] .....
Adding Values Of A Column In A Data-bound Datagridview And Placing Results In A Textbox?
Jul 28, 2011I have a datagridview that is populated from an Oracle 11g DB. What I would like to do is add the values of a column together and display the results in a textbox. What would be the easiest way to do this?
View 2 RepliesRetrieve Data Into A Textbox Field?
Mar 11, 2009I could connect to the database alright. My problem is how to retrieve data into text boxes. In Vb 6.0 i could use the ADODC control to retrieve onto the textboxes as follows[code]...
View 1 RepliesFormatting The Bound Field?
Dec 13, 2009I'm trying to format a datetime field to just show the date. The datetime is bound to an asp:label and for the Text attribute I have tried the following....
Text= String.Format("{0:D}", '<%# Bind("CReviewDate") %>')
and
Text= String.Format("{0:D}", <%# Bind("CReviewDate") %>)
[code]....
In all cases I get a green wavy line under the equation and the tip help says "Validation (ASP.Net): If this attribute value is enclosed in quotation marks, the quotation marks must match.
String.Format("{0:D}", DateTime.Now)
is the syntax that I have been told should work.
VS 2005 Check TextBox Bindingsource Field Data Type
Apr 15, 2011Lets 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]....
DateTimePicker Bound To Nullable DateTime Field But No Null?
Apr 7, 2010I have a date time picker bould to a Nullable Datetime field in a sql server datatable. The ShowCheckBox option is set to true. If the user unchecks the checkbox on the datetimepicker I would like to the field to be set back to null in the DataTable. The default behaveour does not seem to do this and there is no specific event for the uncheck.
Private Sub dtpCertDate_ValueChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles dtpCertDate.ValueChanged
If dtpCertDate.Focused Then
[code].....
DetailsView - How To Populate Date From Bound Text Field
Jan 17, 2011I'm trying to populate a date from a bound text field in a DetailsView. I keep getting a error when a DBNull is in the column. How do I avoid the DBNull when populating the text field.
My code is as follows:
<asp:TemplateField HeaderText="CBYD Clear Date">
<EditItemTemplate>
<asp:TextBox ID="CBYDExpDate" runat="server" ReadOnly="true" Text='<%# IIf(Eval("CBYDDate") is DBNull.Value,"", String.Format("{0:MM/dd/yyyy}", Eval("CBYDDate").AddDays(30)))%>' />
</EditItemTemplate> </asp:TemplateField>
Use Textbox Custom Auto-complete Mode With Data From Saved In Different Records Of A Field?
Apr 17, 2010I have a textbox, a sql database, a binding source bound to the sql database. I can use auto-complete mode of the textbox with custom strings and it suggests in in a drop down form as the user types in a textbox. How can I use autocomplete mode with datasaved in different records of a field using the bindingsource?
View 5 RepliesDisable Bound Field From Editing Dataset Until Save Button?
Nov 17, 2009On my form i use binding source bound to fields.. if a user starts to change something then hits cancel (i set all the fields to "" to clear them) and then if they choose that record again it shows nothing in the bound fields..
is there a way to reset/cancel from editing without loosing original values?
Simple Databinding - Handle Bound Field/property Change - Winforms / .Net?
Oct 19, 2009I have a custom control with a bindable property:-
Private _Value As Object
<Bindable(True), ... > _
Public Property Value() As Object
Get
[code]....
Also, here, I'm adding a handler to the DataBindings.CollectionChanged event.This is the second place that I retrieve the type:-
Private Sub DataBindings_CollectionChanged(ByVal sender As Object, ByVal e As System.ComponentModel.CollectionChangeEventArgs)
If e.Action = CollectionChangeAction.Add Then
Dim b As Binding = DirectCast(e.Element, Binding)
[code]....
I need the first place, because the BindingContextChanged event is not fired until some time after InitializeComponent.The second place is needed if the binding field is programatically changed.Am I handling the correct events here, or is there a cleaner way to do it?
Note: My GetValueType method uses the CurrencyManager.GetItemProperties....etc, to retrieve the type.
Error The Type For Variable 'Index' Will Not Be Inferred Because It Is Bound To A Field In An Enclosing Scope
Apr 19, 2009I have some code and there are 2 errors which I don't understand I have tried all sorts...
1)The type for variable 'Index' will not be inferred because it is bound to a field in an enclosing scope. Either change the name of 'Index', of use the fully qualified name (for example, 'Me.Index' or 'MyBase.Index').
2)Function 'GetNewPhrase' doesn't return a value on all code paths. A null reference exception could occur at run time when the result is used.
I can't get it to work..
Warning5 The Type For Variable 'FolderObj' Will Not Be Inferred Because It Is Bound To A Field In An Enclosing Scope
Mar 12, 2009This program was created with vb6 to find and remove empty folders. i converted this program to VB.NET code and it isn't working like it should.. it seems to stop scanning at 'C:\documents and settings' instead of scanning other folders in other directories...Does this code look right? I can provide the entire program if needed... I just want to know why it isn't scanning like it should. Btw im switching from vb6 and trying to learn vb.net.. vb.net is a lot different..
Private Sub ScanForEmpty(ByRef vFolder As String)
Dim nSize As Integer
System.Windows.Forms.Application.DoEvents()
If bExit Then Exit Sub
[code]....
I get this message at the bottom:Warning5 The type for variable 'FolderObj' will not be inferred because it is bound to a field in an enclosing scope. Either change the name of 'FolderObj', of use the fully qualified name (for example, 'Me.FolderObj' or 'MyBase.FolderObj').
Program Function - Says, "The Type For Variable [variable] Will Not Be Inferred Because It Is Bound To A Field
May 18, 2012Public Class Form1
Dim x, c, number(0 To 19) As Integer
Dim s As Integer
[CODE]...
The variables in the brackets [example] do not actually have brackets in them in the original code. These are where the issues are. For both variables, it says, "The type for variable [variable] will not be inferred because it is bound to a field in an enclosing scope. Either change the name of [variable], or use the fully qualified name (for example, 'Me.[variable]' or 'MyBase.[variable]')." Now, I'm not entirely sure if this is a stupid question or not, as I'm used to VB '98 because that's what we use in my programming class at High School. let me know why this won't work.
-Note: The intention of this program is to continually loop the generation of numbers for this list until I tell it to stop. Button1 ends the program, Button2 generates the list one time only, Button3 is supposed to loop the generation of the list, and Button4 is supposed to end the loop, but not the program.
Add New Row Into Dataset Via Bound Textbox?
Nov 27, 2011i have 3 textbox and 1 listbox bound to the same datatable. when i insert new row to the datatable, there are 2 rows affacted in datatable, one row in datatable is replaced by the newly added row, and this new row is also insert into the end of datatable, while this modified datatable is updated into the database, only the inserted row is updated, the other modified row did not affacted in database.
here is my code:
Private Sub Form1_Load(ByVal
sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim DA As MySqlDataAdapter
[code]....
C# - Using IValueConverter For Bound Textbox
Aug 1, 2011I have a textbox in a ListView:
<GridViewColumn>
<GridViewColumn.CellTemplate>
<DataTemplate>
<TextBox Text="{Binding Password,UpdateSourceTrigger=PropertyChanged}"/>
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
How to convert the text to "." and in-code behind back again to the original text (using IValueConverter or any other method)?
Security - Textbox On Form - User Inputs Data ( During Runtime ) Data Remains In Textbox For Good And Textbox Becomes Read Only ?
Jan 8, 2010Is it possible to have a Textbox on a form that when the user inputs data, ( during Runtime )that data remains in the Textbox for good and the Textbox then becomes read only ? Is it also possible to make it so that the CD with the programme on, is in the PC when the programme is being used. Perhaps writing the Textbox data back onto the CD ?
View 1 RepliesData Bound To ListBox - Display Two Data Items As A Single Item?
May 7, 2012I have an Address Book project with a listbox. The listbox is bound to the database via the little arrow pop-up box in the corner of the listbox. I have the DisplayMember set to FirstName, and obviously only display the First Name of the contact in the ListBox. Is there an easy way to change it so that it displays the First and Last names? I can't change the binding because I need it to get the ID of the record selected.Here's the basis of my code...
Private Sub MainForm_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
'TODO: This line of code loads data into the 'CompanyDataSet.Contacts' table. You can move,
[code].....
How Bound Controls Like Textbox Going To Database
Jan 31, 2011Please help for database connectivity using vb2008 to ms access,and also how bound the controls like textbox going to database using vb2008 as front and back is ms access
View 1 RepliesProgramatically Add Text To Bound Textbox?
Aug 23, 2010I have a textbox that i've bound to a dataset via the IDE.i've but when adding a new record i can;t populate it programatically, but the user can type data into. The follwing code doesn't put the required text in the textbox, but i can type it it while debugging:
FQuoteCard.QuoteHeaderBindingSource.AddNew()
FQuoteCard.TextBoxBurdensOperatorID.Text = "some random text"
this doesn't seem to make any sense - i'm adding new so i should be able to populate the textbox programatically, in the same way as a user can type in the textbox.I suppose i can bind the textbox programatically after adding the text, but this somewhat defeats the object of being able to databind via the IDE.
Field Is Bound To The Orders Orders Qry 'View'?
Feb 29, 2012I am working on an invoicing program that based on the Northwind database.I am pulling information from a 'view' for the orders form.How do i program the customer ID field to populate with the corresponding invoiceID (already done through the view) AND when i drop down the customerID box to list all possible customers from the customers table.I have the SQL for the operation I believe the problem is that the field is bound to the orders Orders Qry 'View'.How can i accomplish both of these tasks within the same dropdown?
View 1 RepliesDrop Down Box Bound To Data?
May 20, 2010I have a drop down box that I want bound to "TicketBindingSource - InvoiceStatus". However I want to have the text bound only. The choices I would like to specify from my own list (Invoiced, Needs Invoice...) When the user clicks on a choice I want it to update the database. [code]...
View 22 RepliesSet Data Bound Combobox To A Value?
Apr 22, 2012I have a data bound combo box which i want to open at a certain row in the table
i can't set the selectedvalue because it is databound