I have the following code:
ListBox.DataSource = DataSet.Tables("table_name").Select("some_criteria = match")
ListBox.DisplayMember = "name"
The DataTable.Select()
method returns an array of System.Data.DataRow
objects.
No matter what I specify in the ListBox.DisplayMember
property, all I see is the ListBox with the correct number of items all showing as System.Data.DataRow
instead of the value I want which is in the "name"
column!
Is it possible to bind to the resulting array from DataTable.Select()
, instead of looping through it and adding each one to the ListBox
?
(I've no problem with looping, but doesn't seem an elegant ending!)
Use a DataView instead.
ListBox.DataSource = new DataView(DataSet.Tables("table_name"), "some_criteria = match", "name", DataViewRowState.CurrentRows);
ListBox.DisplayMember = "name"
Josh has it right with the DataView. If you need a very large hammer, you can take the array of rows from any DataTable.Select("...") and do a merge into a different DataSet.
DataSet copy = new DataSet();
copy.Merge(myDataTable.Select("Foo='Bar'"));
// copy.Tables[0] has a clone
That approach for what you're trying to do is most probably overkill but there are instances when you may need to get a datatable out of an array of rows where it's helpful.
来源:https://stackoverflow.com/questions/114851/how-do-i-bind-the-result-of-datatable-select-to-a-listbox-control