VS 2008 Getting Filtered Data Using With A BindingSource?
Oct 17, 2009
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.
A brief about the foundation of the program: I have created a VB2010 Windows Form application that connects to a Microsoft Access database. A datagridview is used to show all the data of the database. Then, a filter is used to filter the dataview (the BindingSource actually) and show the filtered db's data.
Let's say this is how I filter my BindingSource:
MyBindingSource.Filter = " price > '110' "
This would cause the dataGridView to filter the data (correctly), and let's say 10 rows are now displayed. What I am trying to do now is to get the sum of the values of one column of these new data. For example each of the 10 rows have a 'price' column which contains a double value. I would need the sum of these *filtered* values.
I found on the Internet that I may be able to transform the BindingSource into a DataTable and I could, but now I don't know how to access the values inside this!
I've got a databound query in my application which is querying the "Customers" table in our database.I've created this directly from the ComboBox's datasource creator in the Design view.Various bits of code created in the designer include:
What I've done in the first stage of developing this feature is to show my users a ComboBox showing a specific subset of the customer list by applying a filter to the BindingSource.
What I want to do on a second pass is to allow the users to type a specific bit of information into a textbox and check whether it appears in Me.CustomerDataSet like so:
Dim x As IEnumerable(Of CustomerDataSet.customerRow) = From cust In Me.CustomerDataSet.customer Where cust.custno.Trim = "test" If x.Count <> 0 Then
At this point, I have a customerRow object. I want to check whether this customerRow object appears in the list presented to users in Me.ComboBox_Customers via the filtered Me.CustomerBindingSource. Me.CustomerBindingSource does not (directly) contain customerRow objects, it contains Object objects.How do I find out whether Me.CustomerBindingSource contains the customerRow object at whatever lower level?Also Once I've determined that Me.CustomerBindingSource contains the item, how do I select that entry in the ComboBox?
I have a datagridview bounded to a bindingsource (that is, in turn, bounded to a dataset that is the data origin of the project) and a bindingnavigator to a Access table, all of this done with the visual designer of Visual Basic .net 2005. I want to print in a crystal report the rows shown in the datagridview after filtered using the .filter property of the datagridview. But, to achieve this, I need to get the filtered rows in a dataset, and I havenīt got this in any way. If I pass to the crystal report the main dataset origin of the project, it will print all the rows, not only the filtered rows. I would have figured out that there would be a .getfilteredrows or something like that in the bindingsource object, but there isnīt. I managed to get this manually, through a loop, but I canīt believe it is the solution experts use.
I don't know how to get it back to -1. The drop down list is populated with three doctors, and I added the string SHOW ALL, so as far as I know the index starts at 0 and would start with SHOW ALL. I tried an ElseIf me.combobox1.selectedindex = 0 then me.combobox1.selectedindex = -1 too and that doesn't work either, so I'm obviously doing something wrong there.
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)
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]
I 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?
Code: Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles ComboBox1.SelectedIndexChanged If Me.ComboBox1.SelectedIndex >= 0 Then ' get new owner owner = Me.ComboBox1.SelectedItem ' apply filter to C1Schedule's data source (show only current owner's appointments) [Code] ....
I have it filtering results based on which doctor I select. I also have a "SHOW ALL" item, how would I get it to actually show all the appointments regardless of doctor? Put it all in an if/then statement and check to see if the selected index of the drop down list is the SHOW ALL option? I'm not sure how to programmatically get it to show all though. It actually shows all the appointments (without filtering) as soon as it's opened, it only filters when I want I just need it to go back to unfiltered when I pick SELECT ALL.
I tried every combo I could think of to get it not to filter the results when I select SHOW ALL, but none have worked. If Me.ComboBox1.SelectedIndex >= 0 Thenfilterelseme.ComboBox1.SelectedIndex = -1 If Me.ComboBox1.SelectedIndex >= 1 Thenfilterelseme.ComboBox1.SelectedIndex = -1
I don't know how to get it back to -1. The drop down list is populated with three doctors, and I added the string SHOW ALL, so as far as I know the index starts at 0 and would start with SHOW ALL. I tried an ElseIf me.combobox1.selectedindex = 0 then me.combobox1.selectedindex = -1 too and that doesn't work either.
I have a datagridview in my application with numeric columns and date column. This datagridview is filtered by date. I want a label to show the sum of the filtered rows.
i filter report by bank code filter success bus sum of amounts is not accorting to filter values its total sum of all amounts in data base.i am using this formula in field.=Sum(Fields!tamount.Value, "ibnDataSet_info"i shows sum of amounts for whole data base i want to get sum of filtered amounts only
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] .....
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.
I 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.
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]
Lets 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
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 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
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
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]
