bindingsource

I am trying to bind a ListBox Control in C# Winforms in .NET 4.5 to a list of objects that have a nested property that I wish to use for a DisplayMember. It sort of works except that when I set the DisplayMember to the nested property the listbox only shows one item even though there are two items in the list that it is bound to. If I comment out the code for setting the DisplayMember the listBox shows two items. Is this a bug in the framework? I would like to avoid adding another property or overriding ToString() if I can since I am implementing MVP and would like to keep my view logic

What is the correct order of processing an insert from a data-bound control using BindingSource , DataSet , and TableAdapter ? This is causing me eternal confusion. I have a form that is used to add a new row. Before showing the form, I call: bindingSource.AddNew(); bindingSource.MoveLast(); Upon Save, I call: bindingSource.EndEdit(); tableAdapter.Insert([the row given to me as bindingSource.Current]); The problem is that if I don't call EndEdit() , the changes of the TextBox with the current focus are not saved if I do call EndEdit() , the BindingSource's Current member no longer points to

You can use the Filter property of a BindingSource to do SQL like filtering. For example: bindingSource.Filter= "Activated = 1" Is there something like documentation on the exact syntax of this? I would like to check if a field is not DBNull, so i tried "Field != NULL" but it gives a syntax error. The syntax is generally the same as what would you would use in a SQL Where clause, without the "Where", so in this case, it would be bindingSource.Filter = "Field <> NULL"; If you look at msdn docs for BindingSource.Filter you will see this: "To form a filter value, specify the name of a column

I'm trying to create a DataGridTableStyle object so that I can control the column widths of a DataGrid. I've created a BindingSource object bound to a List. Actually it's bound to an anonymous type list created though Linq in the following manner (variable names changed for clarity of what I'm doing): List<myType> myList = new List<myType>(someCapacity); . ...populate the list with query from database... . var query = from i in myList select new { i.FieldA, i.FieldB, i.FieldC }; myBindingSource.DataSource = query; myDataGrid.DataSource = myBindingSource; Then I create a DataGridTableStyle

I can't quite work out how to allow a DataGridView populated at runtime to sort (when users click on the column headers) where a LINQ from XML query is the DataSource, via a BindingSource. Dim QueryReOrder = From Q In Query _ Where ((0 - Q.Qualifier) / cmbTSStakeValue.Text) <= 0.1 _ Order By Q.Qualifier Descending _ Select Q Dim bs As New BindingSource bs.DataSource = QueryReOrder DGFindMatch.DataSource = bs Some of the DataGridView's properties are: Sort Nothing String SortProperty Nothing System.ComponentModel.PropertyDescriptor SupportsAdvancedSorting False Boolean

I want to display a custom collection in a DataGridView in a Windows Forms app. This custom collection implements ICollection , and IEnumerable . I have set up a BindingSource , using the collection as the .DataSource property. The DataGridView is set to use my BindingSource as it's DataSource. When I add a new item to the collection using the BindingSource.Add() method, the DataGridView updates correctly with the new item. The BindingSource DataSource, on the other hand, does not: MyCustomCollection myCollection = new MyCustomCollection(); myCollection.Add(myCustomObject1); myCollection.Add

I think I understand well enough what the BindingSource class does - i.e. provide a layer of indirection between a data source and a UI control. It implements the IBindingList interface and therefore also provides support for sorting. And I've used it frequently enough, without too many problems. But I'm wondering if I use it more often than I should. Perhaps an example would help. Let's say I have just a simple textbox on a form (using WinForms), and I'd like to bind that textbox to a simple property inside a class that returns a string. Is it worth using a BindingSource in this situation?