Set Default Values For Data Bound Controls For Addition In Program?
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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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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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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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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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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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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Jun 18, 2009
I have a combo box which is databound at run time & I need to iterate through it to get all the values in it (not display items) & then add these to an array or collection.
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Sep 25, 2009
Im having a problem getting the selected values of a listbox that is data-bound..
vb.net
Do Until CType(Ctrl, ListBox).SelectedIndices.Count = 0
For Each Index In CType(Ctrl, ListBox).SelectedIndices
[code]....
The error message says... "Operator '&' is not defined for type 'DataRowView' and string " "." And the only way I can get it to work is to pull out the & operator and change that line of code to this.
vb.net
'FROM THIS:
TableData.Miscellaneous += CType(Ctrl, ListBox).SelectedValue & " " 'Errors HERE
[code]....
The SelectedItem text shows up in the controls current state while debugging, correctly.. but after I finish the execution it shows up as "System.Data.DataRowView"?
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Feb 21, 2012
[EDIT: I've found the problem.] So if I have a checkedlistbox and put some random values in it, I can just retrieve the values like so:
[Code]...
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Jul 28, 2011
I 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?
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Nov 5, 2010
Addition Of Two Textbox Values
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Aug 12, 2011
I have made my calculator and it has 2 textboxes where the 2 numbers (or values go for addition and subtraction) are input and a label where the answer appears. There is other things on the page such as quit, clear etc thats all done but i have one query. I noticed while testing a problem occurs when only one number or value is put into a textbox and a command is hit. For example. one textbox (txtnumber1) has one number in it then i hit multiply and it says the error of course because its not programmed to deal with this (or divide by 0 of course) so i was wondering how i could make so when this happens a MsgBox appears saying a value must be in both boxes or when divded by zero is says something similar.
The line of code:
Private Sub blah blah blah...
If txtnumber1.Text = False Then MsgBox("Please Input Valid Value")
End Sub
I however have not been able to make it work.
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Dec 26, 2010
I have a login form that consists of 2 text boxes: txtUser, txtPass. Now these are not bound to any data table & I don't what them to be bound. When a new user enters his user name & password, I want to add these on a data table that has two columns: User, Pass. Data table information: Data Source = Login.accdb, Data table = LoginTable, Connection = LoginCn. I use visual basic 2010. So how do I do this?
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Mar 23, 2011
I bound datagridview to bindingsource. The bindingsource has its datasource a collection Called Rates which is a collection of Rate items. The rate object has a property called VALUE. I need the user to be able to edit different values for the collection; However, on the datagridview, i need to keep displaying on one column called OldValue the existing Rate value before the change while allowing the user to edit that value in a second column called NewValue.
In other terms, One colum OldValue will keep the existing values from the DB before being edited by the user, this column OldValue is readonly. Another column NewValue will display, the 1st time, the old value from the DB (similar to OldValue when we do the Fetch from the DB), but it`s editable column, so the user can modify each value in the column NewValue without overriding OldValue cells. For now, I bound both columns OldValue and NewValue to the same property VALUE of the Rate object,
[Code]...
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Nov 11, 2009
I have aspx form with several textboxes.They are populated with values from a table via retrieval of a dataview.If the row count for the dataview is 0, then I'd like to reset the values in all textboxes. How can I loop through all the textboxes and set a default value?I've tried the following, but no sucess.
For Each ctrl As Control In Page.Form.Controls
If TypeOf ctrl Is WebControls.TextBox Then
CType(ctrl, WebControls.TextBox).Text = ""
End If
Next
My first For Loop was using Page.Controls but it returned only 1 count.The textboxes are inside a tabpanel (ajax), so do I have to locate the tabpage and then find all it's controls (for each tabpage)?
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Apr 6, 2009
I am using the sample datetimepicker code from the Microsoft web site in a databound datagridview. This works fine if I use the combobox dropdown button and select a date. Is there a way to use today's date by default and not specifically selecting it?
[Code]...
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Mar 2, 2012
I have a data bound datagridview. I want to be able to have column 3 default value is = 0, column 4 default value is = 1 and column 5 default value is = 0. How can I do This. I just dragged the table onto the form visual basics data source panel. I have 20 different colums some have 0's, some have 1's adn some ave 2's. While entering the data, well it takes
[Code]...
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Feb 8, 2012
I am using Combobox in data grid view as one of my column type.I am populating this combobox from table in DB.
Now, I want to do is that I can be able to add text in that combobox cell and on clicking submit button on form, this text should get added to table in db.
When i load the form again, again in that combox cell it should display this text along with previous text . means, two items will now get displayed.
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May 28, 2010
Is it possible to set a project default for VB.NET winforms projects so that the default Modifier for controls added to winforms is Private (not Friend)?I know there's a "modifiers" property in the properties window so I can set it for each individual control however I would like to change the project so from now on myself and other developers have to specifically decide to change from friend to private. (Which I would strongly discourage them from doing).I believe there is no way of doing this, but on another forum a while ago someone mentioned it would be possible with an add-in (but didn't name the add-in or where to get it).
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Mar 21, 2010
Here is an issue that i am facing - VB6
[Code]....
The value of d3 is not coming to 301006308001004.5 but it is getting rounded off. Is there a way to fix this. When I use currency data type, the issue looks solved. However currency cannot hold a larger decimal number. the value of d2 can have more decimal value like 0.343324532553 .
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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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Apr 6, 2011
I am creating a project in VB.NET in which one of the reports require that the name of employees should be displayed as column names and whatever work they have done for a stated period should appear in rows below that particular column.Now as it is clear, the columns will have to be added at runtime. Am using an ODBC Data source to populate the grid. Also since a loop will have to be done to find out the work done by employees individually, so the number of rows under one column might be less or more than the rows in the next column.Is there a way to create an empty data table and then update its contents based on columns and not add data based on addition of new rows.
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Jan 11, 2012
i want to know that how can we add two cells of a datagrid view.I have 5 cells, quantity,rate,discount,tax and Total amount.I want to show the total amount in "Total Amount" cell.
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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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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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