Binding Source Adding New Method?
Sep 13, 2009
I'm currently working on a project where I want to ensure a user does not create a new record based on an ID (such as Customer ID) that already exists.If the record does exist, don;t create the new record and simply move the bidning source to the existing record and display that.What I'm currently doing within the Binding Navigator Add New Click event is checking if there is current data to save and prompting the user if they wish to save the changes before doing anything else.I then set a boolean variable called _NewRecord to true. Then within the lost focus event of the record ID, I have the following code:
Dim itemFound = -1
If _NewRecord Then
itemFound = GroupExists(txtGroupID.Text)[code]....
The code above works well, but I was thinking of doing this using the AddingNew event of the binding source instead to check for an existing record and simply cancel the new record addition then move to the existing record. However, I couldn't find any good examples of how I might do that or how to properly use the AddingNew event.good example of using the AddingNew Method as it looks like it might be useful to know for future projects.
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Oct 29, 2011
is there any way that i could link/bind multiple binding source to only one binding source navigator?
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Oct 18, 2010
binding navigators, datagrid view, binding source are all sql database parts.Will these parts still work if you havent got sql on you pc and your not using an database file (.log and .mfd) and your not coding to them, im using MS Jet/Oledb to code to Excel.What not to put on an Employee evaluation: This employee has hit rock bottom and shows signs of starting to dig.
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Oct 11, 2010
I have an Access database and I want to view on a datagridview specific rows. For that I used the following :
CasesBindingSource.Filter =
"OfferDate Between #1/1/1997# And #12/31/1997#"
Cases is the table, OfferDate a field of the table wich is DateTime type.
When I use Between operator I get the following error :The expression contains unsupported operator 'Between'.
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Apr 12, 2011
I have a program that needs to generate a random 8 digit ID and check to see if it in the database before adding it to a new row.
At the moment I have the correct code for doing this, but I have it in the event handler Bindingsource.AddingNew. This event handler executes my code and THEN adds the new row. How can I get it to add then new row and THEN execute my code? Is there an event handler I can use to do this?
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Mar 8, 2011
I found the same thread but it has never been answered. So I better to post a new one.
The problem is I added a new column in my table, I have a dataset linked to that table and a source of data of my datagridview.
Now, when I'm going to add a new column into my datagridview, I didn't find the new column which I added recently. Seems that the binding source is not updating whenever an update takes place.
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Aug 21, 2010
I'm writing a order entry system and I'm using structures to pass information around various parts of the program for things like the order header (order date, customer name, etc).
In building the form I discovered that you could use a binding source between form controls and the struct which is great because it means alot less code on a form that will be very busy anyhow. Unfortunatly I'm either doing something wrong, or I've discovered a bug in vb.net because when you fill in a textbox and the binding source fires the setter for that attibute of the struct, it does one of two things. It either: Finds the struct that I assigned to the binding source then creates a new instance of it after it is done thus destroying any changes.Creates a new instance of the struct because it wants to rather than use the one I instructed.
I know this sounds confusing so I'm including a small program that demonstrates the problem I'm having.
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Nov 26, 2011
How can I modify this code to add a binding source to datagrid1.datasource
DataAdapter.Fill(ds, strFileName) ' Fills data grid..
DataGrid1.DataSource = ds.Tables(strFileName) ' ..according to data source
DataGrid1.AllowUserToOrderColumns = False ' Disallows sorting to keep it all straight
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Jan 25, 2012
I'm creating a dataset (AddressDataset) that has 2 datatables - addreess and state.
Addrees: line varchar, state_id number
State: state_id number, state_name varchar
I've created a data relation between state id on these tables. I'm setting up to combo boxes: cboAddreess, and cboState. I'd like cboState to change to the correct value when address changes.
Dim dbSelCommand As OleDbCommand
Dim dbSelCommand2 As OleDbCommand
dbSelCommand = New OleDbCommand
[code]....
This gives me "address cannot be found in binding source".
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Jun 3, 2011
I've got a somewhat sillier question this time. After I insert/update my data using SQLParameters, it wont refresh. I'm using the following code to refresh the binding source:
[Code]...
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Oct 8, 2010
First: I have a numericUpDown and a class that are bound.
Me.percent.DataBindings.Clear()Me.percent.DataBindings.Add("Value", options, "percent")When I change the numericUpDown the underlying class seems not to update. I have to click outside the numericUpDown to force validation and force syncing. This is very counterintuitive and will cause problems. How can I make sure the underlying data object gets the new value on valuechange rather than validate?
Second: After I change the numericUpDown I have an option that serializes the underlying data in an xml file. The underlying XML file does not always get the right data. To figure out what is happening I added a button that outputs the values of the underlying data object and it is always getting updated. In other words...the control and the object values always agree. The serialize
[Code]...
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Jan 23, 2009
I have a child form open (frmProfile) and when I click on the Search button on the Toolbar another form is loaded. On the search form is a few text boxes where the user can input different search functions (First Name, Client ID, Last Name, SSN, Male, Female, etc). Also on the form is one DataGridView.
What I need to do is:
1) After double clicking on a row in the dgv, it sends the clientid to the parent form (frmProfile). I actually have this working but looking for improvement.
2) I would like to then click on the Next button on my toolbar and it go to the next record in line.
At the moment, I only have 1 record that comes in out of 9500. Below is the code from the Search Form and the Profile form.
[Code]...
I have my own toolbar with Add. Delete, Previous,Next etc. I disable some depending on the user so I am not interested in the BindingNavigator. What method is used for movenext in code?I could really use some help on this. I have spent way too much time so far but needing to learn the nuts an bolts of 2008
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Aug 25, 2009
Im having some wierd behavior on a bound form in vb.net 2008. I have setup a client form, with another tab that has contacts for that client. the contacts tab has a binding navigator at the bottom, so the user can move amongst the contacts. all fields on that form are bound to a bindingsource called bsContact, using a table adapter called "ContactTableAdapter"
if i have a contact already saved, and want to modify the contact info, the form binding doesn't seem to recognize that i have changed the value of a textbox on that contact.i would think that if a textbox is bound to a bindingsource, then if the value of that textbox changes, the bindingsource would know about it, but it doesn't. The dataset.HasChanges returns false, and my save wont happen. (see code)so, when i hit the movenext on the bindingnavigator, it changes to record 2...i change a value on a textbox...i hit the save button on my form....no update will happen.
Update: I noticed that if i am on the tab with the multiple contacts, and i change a textbox on the form, then i MOVE TO ANOTHER RECORD, then the dataset recognizes that there was a change, and the update happens. Why doesn't the textbox immediately notify the dataset that a change is happening?
[Code]....
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May 29, 2011
I'm using the following code to refresh my binding sources, but it doesn't appear to be working for my details view.[code]...
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Oct 27, 2010
I can't get my binding source to update from a DataGridView
This is how I'm loading the dataset into the dgv:
vb.net Dim sFileName = filelocation & "Checks.xls"
Dim connectionStringTemplate As String = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties=""Excel 12.0;HDR=Yes;IMEX=1"""
Dim connectionString As String = String.Format(connectionStringTemplate, sFileName)
Dim sqlSelect As String = "SELECT * FROM [Sheet1$];"
Dim workbook As DataSet = New DataSet()
[Code]...
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Jun 21, 2010
I have a form with a binding source bind to the invoice table. I want to generate invoice report when the user selects an invoice record from the datagridview and clicks generate report. What i want is
1. how can i set the report's source to the binding source
2. can i do this using the crystal report generating wizard
3. or what articles or sites you recommend me so as to do this
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Jun 21, 2010
I need to know which is better in vb.net... BindingSource( such table adapter and etch..) or Hardcode( such as parameters,sqlcommand,sqlconnection that all your codes are programatically done)?..Which is Which?
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Dec 13, 2010
I want to filter 2 columns in binding source o
1.- sucursal by watever is in textsucursal
2.- tipo has more then 7 valuyes..but i want to filter by only 4 the ones shown in query..[code]
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Sep 5, 2011
The table field [recordaddeddate] is a Date/Time field in my Access database. Usually this field contains a date + time value. For filtering on my datagridview I want to filter on the date portion only. However the following genterates a 'The expression contains an unidentified function call DateValue' error. How can I filter on just the date?
DateSelected = DateValue(Me.AddedDateDateTimePicker.Value)
Me.ConversationTblBindingSource.Filter = "DateValue([recordaddeddate]) = #" & DateSelected & "#"
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Jan 22, 2009
HIDoes anyone have code for filtering numbers in a binding source?
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Apr 13, 2010
I want to create a binding source from a data gridView that i have that is connected to NorthWind database wit Mysql
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May 15, 2009
I use the Add new button (of the Binding Navigator) to clear the text boxes for a new record, but then have a Update button on the form where I do an Insert query to SQL, which works because if I refresh the table in SQL the new row is there.However when I then use the Binding Navigator 'move previous' button I get an error saying "Column 'AllowOverbook' does not allow nulls. " - now this is a column that is defined in the database to have 'Allow Nulls' = False, but I do not display this field on my form because in this case it is not required.Instead I have it included on my Insert statement and just set it to '0'
Also when you look at the table every entry in the AllowOverbook column is '0' and there are no NULLS.
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Jan 6, 2011
I am creating VB.NET Windows Application. I have Placed a Binding Navigator Control on Form and that is Binded with a BindingSource Object which has a Binding Source of a Data Table. I have Binded Two textBox with my Binding Source and I am able to Navigate in Records uisng Binding Navigator Object but when I made some change in my record and try to update that I my Database (SQL Server) it show an Error that "Update requires a valid UpdateCommand when passed DataRow collection with modified rows" where as I have defined DataAdapter.UpdateCommand and that is valid one. Below is the Code.
[Code]...
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Jun 1, 2009
I just don't understand what's going on - it seems to be "inserting" bogus rows into the table as I step past each line of code here.
[Code]...
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May 28, 2009
i have a datagridview bounded to a bindingsource that's pointing to a datatable created at runtime. In the same form i have a Add New, Save and a Cancel Button,the Add new calls the addNew, the Save Calls the EndEdit and the cancel the CancelEdit. Now the problem, if i fill only some fileds in the new row and call the cancel edit, the row is deleted, but if i fill all fields and i call cancel edit nothing happens.What i want it's, when i press the cancel button even if i put values in all fields the row get deleted.
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Mar 26, 2011
I'm trying to accomplish that every time I click + on binding navigator, datetimepicker get the today date. Not only on the form, but on the binding source also.After previewing saved data, the date cell of datagridview is empty.That doesn't happen when I select wished date manually on the form, only when I enter it in code.
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Feb 23, 2012
Im trying to do bind a dropdown list to a details view but keep getting an error about the dropdown list ID field:
<asp:TemplateField HeaderText="Approval">
<ItemTemplate>
<asp:DropDownList ID="Approved" runat="server" DataValueField="Approved" SelectedValue='<%#Bind("Approved") %>'>
<asp:ListItem Text="Approved" Value="Approved" />
[code]....
The error message as follows:
'Approved' has a SelectedValue which is invalid because it does not exist in the list of items.Parameter name: value
What is the proper way to attach the value of the dropdownlist to my object so that it can be properly created in the database? Most of my searches keep telling me how to bind a dropdownlist to an object data source, but that is not what I need to do. This is a basic drop down list of 2 items that will never change.
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May 3, 2009
I am using bindingsource.find to quirie information, its working so nice but I have a problem when the bindingsource cannot find the information I want it to show me the information that is inside the field, even knowing that the information that am looking for is not there:
I have something like this:
dim findinformatio as string
inputbox=(type the name)
dim findme as intenger=me.bindingsource.find("LastName", FindName)
me.bindingsource.position=findme
if bindingsource.position=findme then
msgbox(Findname)
else
msgbox(me.bindingsource.find("LastName", findName)
I am doing it because if the information that am looking for is not in the record field. I want the bindingsource show me the information that is inside the recordset field(LastName). I used to do it with odbc and works fine but with bindingsource I cannot, Why? And I have a compact database, sdf. I loaded the tables on my project.
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May 14, 2012
I have a datagridview with a datasource from a MySQL query. Works fine. However, I want to add an extra column and generate some data into the cells. This works fine too and shows up as intended. However, I cannot sort on that extra column and the contents of the cells in the column are cleared out if I sort on the other colums. I realize this is all because of the original datasource, but Im hoping there is a way to "connect" the extra column in somehow?
Grid_SearcherResults.DataSource = dbconnection.bSource
Grid_SearcherResults.Columns.Add("Location", "Location")
'Then some code to set the value of the cells in the new column.. etc
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Jan 26, 2012
How can I filter multiple clauses in a binding source. I've tried
Form4.CustomersBindingSource.Filter = "[Last Name] = '" & TextBox1.Text & "'" & "[First Name] = '" & TextBox2.Text & "'"
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