[2008] Mixing BOUND Controls With Non-BOUND Controls?
Jan 26, 2009
We are binding most of our text boxes and dropdown boxes to a BINDING NAVIGATOR (with a DATA SOURCE of a DATA TABLE).When the BN is clicked through the text boxes all change immediately.We need to use some non-bound controls as well.First one is 4 radio buttons that when clicked will change a single value in a DATA TABLE.What would be the best method to do this? Should I track when the CURRENTCHANGED event occurs on the BINDING NAVIGATOR.I'm thinking that I could trick this by BINDING the SINGLE FIELD to a HIDDEN TEXTBOX and when that textbox CHANGED event occurs mess with the radio buttons and visa-versa.
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Sep 6, 2009
[edit]oops - stupid typo - this is resolved and explained in the next post[/edit] I've got a BINDING SOURCE - that I bind to controls - textboxes mostly. I create a row in the datatable behind this BINDING SOURCE like this.
[Code]...
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Jun 15, 2010
I don't normally use strongly typed datasets, but I am maintaining an existing application that uses them.This application has a form to edit rows in detail view, so we have the navigator toolstrip with nav buttons on top, including one to add a new row.When this button is clicked, I need to update one of the bound text boxes with a value from the underlyingThe field in question is defined as nvarchar 25 It's almost always integers in this field, but one row has a string.In the dataset, I have a table adapter to go get the max value + 1 where the field is numeric, like this:
SELECT internal_num = CAST(MAX(internal_num) + 1 AS NVARCHAR(25))
FROM dbo.invoice_log
WHERE ISNUMERIC(internal_num) = 1
[code].....
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Jan 31, 2011
Please 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
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May 20, 2010
I have a windows form with multiple TextBoxes that are bound to a DataSet of type XML. I load text into the textboxes using DataSet.ReadXML method in the form's load event.
I have another windows forms application which edits the XML contents in that XML file.
How do I force the textBox controls on this form to refresh once the XML datasource file items are changed?
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Jun 3, 2011
I am using Microsoft Visual Studio 2008 and want to design my Dynamic crystal reports. In vb6 i normally did this via bounding each control of the section1 ,2 or 3 via run time code by giving the name of that control something like
.section3.controls("txtName").text=some value
can I did the same with crystal reports as well in VB.Net if yes than how.?
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Jan 17, 2012
I have a few bound data controls on a form. However, there are certain data fields in the same table from which this data is coming from which I would like to be able to access in memory but which is not bound to a control. I have tried looking through the properties of my datanavigator, my dataadapter and my databindingsource and can't seem to find out how to sort this.
In simple terms, I have a data navigator to iterate through various fields in my dataset. I want to be able to access to the contactID of the currently visible / selected contact. The contact ID exists in the data source but I do not want to show it, just access it. How do I do so without issuing a manual SQL call to the database again?
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Feb 27, 2012
what event fires when individual textboxes that are bound to a data source using the properties pane gets refreshed? I wish to use this event to populate a few textboxes that are not bound.
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Feb 18, 2011
The following code works (rows are filtered by the select expression), but then all the controls in the datarepeater are empty. When set to .DefaultView all records return and all controls have their values.
Private Sub CheckBox_FilterApplied_CheckedChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles CheckBox_FilterApplied.CheckedChanged
If CheckBox_FilterApplied.Checked Then
[code].....
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Oct 15, 2010
I have a form with some textboxes on it. The textboxes show values from a table. I have a binding navigator that lets you step through the records in the table and the textboxes update. What I want, is to have a control, say a listbox, that allows you to select a value which will filter the data behind the controls so that you only have one record.
So, for example, say you have a table of contacts. There are textboxes on your form that show name, phone, address etc. You could then have a listbox that showed a list of all the contacts and you could select one, which would in turn the textboxes. The filtering field could be contactID for example.
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May 20, 2010
I have a windows form with multiple TextBoxes that are bound to a DataSet of type XML. I load text into the textboxes using DataSet.ReadXML method in the form's load event.
I have another windows forms application which edits the XML contents in that XML file.
How do I force the textBox controls on this form to refresh once the XML datasource file items are changed?
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Aug 24, 2011
I'm currently working on a data entry application in VB.NET and I'm using data-bound controls by simply dragging the table from the Data Sources window onto the form. It's my first time doing this, but this will save me quite a bit of time since this table has plenty of fieldsAnyway, my problem is that when I enter an invalid value in a textbox and then delete the text it won't let me select other controls or even close the form!
For example, say I have an Age field in the DB, which is an int and I mistakenly type "," on its textbox. Then I decide I actually want to leave that field blank (considering it allows nulls) so I just delete all of the textbox's contents, after doing so, I'm not able to switch focus to another control or close the form.
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Oct 20, 2011
In an earlier post today [URL].. jmcilhinney in post #9 says,Quote: If you're going to use a DataSet at all then there's no reason not to use a typed DataSet. I would not recommend dragging items from the Data Sources window directly onto a form but that is not a requirement of using a Data Source.
I was wondering what is the down side of dragging items onto the form. I don't mind doing the manual programming, I would just like to know the reason I'm doing it.
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Feb 13, 2012
We've got a bunch of forms that are using data binding through a binding source control to get text from a textbox into a dataset and then into a database. The problem is that we need to be able to strip trailing spaces before saving the data.
Is there an easy way of doing this without having to go through the dataset manually trimming every string? Ideally everything should update to keep things consistent (e.g. no trailing spaces in the database, dataset or textbox).
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May 29, 2010
I am writing a simple Address Book Application using Typed Dataset & Bound Controls. 1<sup>st</sup> Form for Entering Addresses 2<sup>nd</sup> Form for Adding New 'CITY'. To select a city for address I am using a data bound combo box which shows a list of Cities.
While entering with a address if user found the required City Name is not found in the Combo list, he opens a 2<sup>nd</sup> Form to Add a City name to database & returns to Form1.
Here the expected newly added city doesn't appear in the combo list, so I tried to Refill the underlying table with following code
[Code]...
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Jun 18, 2012
I have a vb.net 2010 form with 22 data bound controls from two tables held in a dataset which is navigated by a bindingnavigator. This successfully adds deletes and updates. However what I need is when adding a new record I need some of the fields to be pre filled out. More specifically I have points balance fields etc which could be any value but will normally be 0 on a new customer so I want to initialize them to 0 when adding new records.
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Jun 16, 2009
I want to allow blanks in BOUND textboxes that are bound to int and money columns.
It's not letting me - apparently it knows to force digits...
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Sep 20, 2010
Is there anyone who can tell me the code for the below? Receive a lower bound and an upper bound of a range. Also receive a number of random numbers to generate. You must validate
1) the numbers are integers
2) the lower bound is less than or equal to the upper bound
3) the number to generate is positive (i.e., > 0).
Generate this many numbers in the specified range and keep track of how many of each are generated in an array of counters. Once all the numbers have been generated, display in a List Box the number, the raw count data, and the percentage of how many times the number was generated displayed with two decimal places of precision.
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Jun 4, 2010
I have a DataGridView that is bound to a DataSet I created from a database table named Contacts. The Contacts table contains a field called StatusId. StatusId is a foreign key to a table called Status. The Status table contains StatusId and StatusName.
[Code]...
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Jul 9, 2010
There is something strange going on with my datagridview.
I've a data adapter that fills the underlying data table from a database. Then I assign this datatable as datasource to the datagridview Then I add a row to the datagridview and immediately I need to update the table in my database (as soon as user leaves the newly created row).
At this moment I have more rows (+2, not +1) in my datagridview than in the underlying datatable (the new row doesn't exists yet in it so the data adapter .Update method doesn't write anything to the database).
When DataGridView's .RowLeave event fires the undelying datatable is not yet updated. I've a question - is this behavior normal?
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Jul 5, 2010
I've got a piece of code in a project (MyProject) that contains early bound object from a referenced assembly (We'll call it CommonAssembly):
Dim myObject As CommonAssembly.MyEarlyBoundType
now I have another assembly that is dynamically loaded because it is not present in all projects:
Dim myLateBoundObject As Object = AppDomain.CurrentDomain.CreateInstanceAndUnwrap("Utils", "Utils.MyLateBoundType")
MyLateBoundType derives from CommonAssembly.MyEarlyBoundType, and I want to cast myObject to myLateBoundObject and then programmatically invoke the additional
[Code].....
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Jan 21, 2011
I am rather irritated at this. I have no clue why looping through controls on a form and in groupboxes leaves out 75% of the controls.
Here's the code I have:
Dim settings As String = ""
Dim gbControl As Control
Dim gbbox As Control
[Code]....
I want to have setting save all settings to an ini file, and not have to reprogram the saving routine when I add a group box or control. At random times, any number of controls can be disabled, checkboxes can be checked and unchecked, radiobuttons can be checked and unchecked. Regardless of the state of the control, I want the control to show up in the loop. But they don't. Only controls that are enabled and only checkboxes that are checked, every other control state is ignored. That's crap, and is definitely not what is needed by any programmer of any type. We're capable of determining if a control is enabled, hidden, checked, visible, and otherwise.
How do I get the controls to be included in the loop regardless of their state?
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Nov 10, 2010
I have a combobox2 this is bound to a datasource, which is an arraylist calledListItems.Everything is correct after the first For Next Statement - the listbox1Combobox1, and ComboBox2 all have 11 items. After the second for next loop, Listbox1 and ComboBox1 have 6 items, but ComboBox2 has 11 items, even though ListItems has only 6 items.
ListBox1.Items.Clear()
ComboBox1.Items.Clear()
ListItems.Clear()
[code].....
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Jun 8, 2010
I have a class which I'm binding to a series of textboxes, date pickers and so on. When I change text in the text boxes, the object updates just fine, and when I then save the data, it has the changes. My problem seems to be with the RTB ... if I bind to the .Text property, it works just fine and updates like any normal text box. However... when I bind to the RTF property... changes to the object don't happen unless I first click out of the RTB... quite annoying. If I edit the text or change the formatting, and hit the save button, the changes don't get reflected in my object. I've even tried using debug statements to track when the property is changed, and I'm not getting the results I desire.
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May 30, 2009
I have a check box column in a datagrid which is bound to a dataTable.My problem is if I check/uncheck some checkbox items in one row and then move to another row, the checkboxes that I checked/uncheck are reset back to their original state. Is there a way to maintain the edited checkbox state of items between rows?
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Oct 31, 2011
I have a DataViewGrid1 that has two hidden fields that the user cannot view. Code and Name.Code is a primary key field and must be manually set prior to inserting into table. It is currently giving me an error saying that code cannot be NULL. The following is the code that I have:
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Me.SIZERUNSTableAdapter1.Fill(Me.Corkys_ProdDataSet.SIZERUNS)
[code].....
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Dec 2, 2009
How many controls can I have before I should start looking at user defind controls because of too many controls making my program go slow?
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Nov 18, 2010
I am trying to cycle throught the lables on my form but it would appear that I am missing quite a few labels... I have a total of 69 lables on my form and I only get 5 hits on the msgbox.
Dim ctl As Control
For Each ctl In Me.Controls
If TypeOf ctl Is Label Then
[Code].....
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Apr 30, 2009
I've got a textbox on a screen - RateHr_3.
I'm binding it like this
If TypeOf ctl Is TextBox Then
Dim txt As TextBox = TryCast(ctl, TextBox)
If txt.Tag IsNot Nothing Then
[CODE]...
Now - here's the really odd part! See the attached image. I call up a vendor - go to change the LANGUAGE FROM (Finnish) to another language - when I leave the DROP DOWN for LANGUAGE FROM it puts garbage in the RateHr_3 field. It actually fills the field with "System.Data.DataRowView" - as you can see in the bottom piece of the attached image.I'm having a really hard time debugging this - How do you put a watch on a textbox in VS2008?
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Jan 15, 2010
Is there a way to add rows to a DGV as I want to add information from another form to the DGV. The .Rows.Add() does not work as I am told I can not add rows to a data bound grid.Short of unbinding the DGV and re writing everything, I can not see how to do it.
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