Hello, window forms treeview control has now a datasource attribut, but I didn't find any example to bind a datasource so you see some nodes. Can anyone help me ? Best Regards Gerhard ...more >>

I have a custom control that has a DataSource property that uses the DataSourceConverter TypeConverter and two DataMember properties that use the DataMemberFieldEditor to allow the user to select the fields. In .net 1x the designer allowed a DataTable to be selected as the DataSource. In t...more >>

I know I am missing something conceptual here, probably pretty simple too. I am trying to make a user preferences dialog box. I have a Windows form with suitable textboxes on. In VB 2005 Express, I created a datasource from the My.Settings object, and dragged the "fields" from that dataso...more >>

I created a form that include a BindingNavigator. My BindingSource has some required fields. If I use the bindingNavigator AddNewItem the bound controls are cleared. If I press the AddNewItem again I get an exception because som required fields are not set. I tried using the Validating e...more >>

Hi, I have a winform with a datagrid who is filled from a database, this is working. Now I had place a "save" button on my form. This is where I'm lost, the main question is how can I fill my database with the new data from the datagrid? Any code snipper, url, hints will be ...more >>

Hi. I need to know the name of the child table with Master/Details configuration. This child table is binding with DataGridView The DataSource of this DataGirdview is a Child BindingSource control. I have used various techniques but I can not resolved it. How Can I find the name of the ...more >>

i have a bound dataviewgrid with a checkboxcolumn. when the user clicks a checkbox if the value is true i want a button to be enabled. the logic is: 1-loop through checkboxcolumn cells 2-if the cell value is true enable the button and exit loop 3-if there were no checked cells disable the but...more >>

Hi @all. I have a problem with the use of a BindingSource in connection with nested properties (relations). Let´s imagine the following situation: class Person { public ICollection<Position> Positions { ... } .... } class Position { public string Description { ....more >>

Hi Is there a way to tarp the AddNew event on the BindingNavigator to do some checks before allowing BindingNavigator to add a new record? Thanks Regards ...more >>

I've found that the StatusBar Panel object does not have a DataBindings property which doesn't help if you want to do such a thing. Searching the web and these news groups didn't present me with an answer so I thought I'd post what I came up with to help others. Add another control to your f...more >>

Hi, I understand that BindingSource.ResetBindings causes a control bound to the BindingSource to reread all the items in the list and refresh their displayed values. The question is that how can I force the BindingSource to put controls' data back to underlying data source? ...more >>

Hello. I have a GridView connected with bindingSource and BindingNavigator. I want disable to delete the grid at run time. For this, I disabled the DeleteButtonItem on the BindingNavigator Bar and disabled the AllowUsertoDeleteRows property of the Grid. The problem is that when I run ...more >>

Hi Sorry my english isn't the best ;-) I've got a Windows Application Project in Vb.NET. There's a form which contains some Textboxes, an component of my typed DataSet, a BindingSource, a BindingNavigation, and a datatableadapter component. All this is created by the designer, i just dra...more >>

Hello, my int values in a column should look like "34 m³". I tried to set the Format Property of the DefaultCellstyle from the column to "0 m³" or "0\" m³\"". The DataGridView displays it correct, but when I edit the value "34 m³" by deleting the first number to "4 m³" I get an Parsing...more >>

Hi How can i get access to the column for wich the validating is happening ? In the following event? DataGridView_CellValidating(object sender, DataGridViewCellValidatingEventArgs e) Is this the place to check if the column has a valid value ? Greetings Andre Mens ...more >>

Hello, I noticed that, when I call the SuspendBinding method on a BindingContext of a form, and then manually change something in the underlying data source, it forces a refresh of all bound properties, even though binding has been suspended. All values read are System.DBNull in this case. I ...more >>

Hi I have a datagrid (ui_grdProduct) and I want to change the columns. I think the code below should work but it does absolutely nothing. I am clearly missing something simple. I would appreciate a pointer thanks jc Dim tableStyle As New DataGridTableStyle tableStyle.Mappi...more >>

I'm trying to use a DataGridView to list a number of artifacts from a DataTable. As there can be duplicate instances of one artifact stored on the disk there is also a related "Source" DataTable that holds the file paths to each instance of an artifact. Now I want to include a ComboBoxColumn i...more >>

Hello, if I bind a property of a control to a field in a data source, is there a way to know that its value has changed as a result of data binding. For example, if I bind Text property of a TextBox, I need to know that TextChanged event was triggered because value has just been read from the...more >>

Hi everyone, I'm new to VB .Net and I want to display a master-detail data in two separate datagrids, like grid1 will have all the master records and when i click a row in grid1, grid2 will display the details for the row that i clicked. thanks in advance diego ...more >>

What is the proper way to indicate that changes have been made to data on a form so that an Update method can be called when the Form closes, if and only if, there have been changes made to the data by the user. I started with the Walkthrough: Displaying Data in a Windows Form Using a Paramet...more >>

Hi, Just starting to get to grips with this stuff so forgive me if my questions are somewhat basic. I'm having a spot of bother binding interface controls to foreign key items in a dataset. As an example, say I have a dataset consisting of two tables, Address and Country. The Address t...more >>

FW 1.0/1.1 both have class Binding - it maintains a simple binding between a property on a control and a property on a single object. FW 2.0 suggest new class - BindingSource. I try to understand - how these two classes are related to each other? Does BindingSource just more functional and power...more >>

This is my first attempt to establish DataBinding. I have added an Event Handler for dsAuthors1, table authors, but it has no effect. What am I overlooking? /********************************************************************* @btnShow_Click() -- Fills the DataSet dsAuthors1. ****...more >>

I try code sample from article "Windows Forms Programming How to: Add Change Notification for Data Binding" (for VS2005's off-line MSDN link to this article: ms-help://MS.VSCC.v80/MS.MSDN.v80/MS.VisualStudio.v80.en/dv_fxmclidata/h tml/b5b10f90-0585-41d9-a377-409835262a92.htm) In this code ...more >>

I'd like to display the data stored in a table sorted by a certain field. I want it such that those with values for that field will come first, while those that have the field empty will go last. If I use the Order By clause, records with the field empty will come on top instead. How can I go ...more >>

Hi NG! Is there any way to have a ComboBoxColumn display a different set of values for each different row in a DataGridView? What I mean is, given the following situation, ParentTable parent_id (1) ......... active_child_id_fk (3) parent_id (2) ......... active_child_id_fk (4) parent_...more >>

Hi all Is it possible to bind DataGridView to a datarow array. For example, array which is returned by Select method of a DataTable object. I know that I can probably use DataView object as a data source. Thanks ...more >>

I'm setting up a summary-detail form using a BindingSource control, a DataGridView (for the summary), and a UserControl (for the detail). The user control that hosts several text boxes, radio buttons, and so on, which can be used to update the BindingSource's Current value. I discovered pretty...more >>

All, I have a custom control that has a property strong typed as one of my custom collection (inherits from System.Collections.CollectionBase and implements System.ComponentModel.IBindingList). I am trying to build a databinding through the VS2005 IDE Formatting and Advanced Binding window. ...more >>

Hi, I have a DataGridView in my form which is bound to a DataTable. I am setting up a summary row at the end of my DataGridView rows that shows the total for $ columns. Is there any way in data bound DataGridView to setup the last row as calculated/unbound row? Thank ...more >>

Can the DataGridView display heirarchical data? If yes can someone please point me to some documentation or examples. ...more >>

Hi, How can I bind a check box to a string "Y/N" column in my datatable? I am asking because I assume that checkboxes are bindable to boolean column. Am I right? Thank you, Alan ...more >>

Where is version information stored of a assembly ? Version information is stored in assembly in manifest. Is versioning applicable to private assemblies? Versioning concept is only applicable to global assembly cache (GAC) as private assembly lie in there individual folders. Full Intervi...more >>

Hi all My second post in 2 days.... can anyone help me ...please... What I'm trying to do is so simple, i've done it a million times in VB6, VBA etc.. but I'm coming up with one problem after another using the dot net frame work, it all seems so much more complicated and convoluted (my fau...more >>

Hello, I am having a problem with retrieving sorted information from a dataview. I am working on a simple application, which uses a dataview object to sort data by one column ("d") I have no problem populating the dataview from my existing dataset, which has a table called "events" Dim dv A...more >>

Hi all I have been learning about bound forms on Pocket PC devices. Initially I have been using things similar to this.BindingContext[DSQuestions, "tbl_details"].Position--; to navigate the record set. All has worked well. However, while learning about bound recordsets I stumbled acro...more >>

How do I databind a DataGridView column to a property on another referenced object? That is, I want to bind to "Parent.Name" where Parent is a property that references another object. I know this can be done when databinding TextBoxes. Surely it can also be done with grid columns. The fo...more >>