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Combine multiple lists inside a BindingSource

I'm using a BindingSource to gather up some DataGridViews on multiple database calls.

BindingSource

DataGridView

What I want to do is combined all the DataGridViews in the .List property of the BindingSource into one so I can use DataGridView.DataSource = BindingSource.

DataGridView

.List

BindingSource

DataGridView.DataSource = BindingSource

I've tried the following, but it only binds the collection itself and not the .List properties.

.List

BindingSource _bindingSource = new BindingSource();
...
...
while(<doing database calls>) {
// Populate _DataGridView with some a DB Call

_bindingSource.Add(_DataGridView); // Add _DataGridView to the _bindingSource
}
DataGrid.Datasource = _bindingSource;


What I want is something like this

// Populate _bindingSource with the .List property/or all the items within _bindingSource
DataGrid.Datasource = _bindingSource[0] + _bindingSource[1] + ..


1 Answer
1

DataSource is object.

DataSource

object

So you will need to know more about the actual DS you are using; then you can (maybe using a suitable Cast<>) Concat (or Union) the various enumerations.

Cast<>

Concat

Union

Let's look at a simple example using DataGridViews that are bound to DataTables :

DataGridViews

DataTables

var twoDataSources = ((DataTable)dataGridView1.DataSource).Select()
.Concat(((DataTable)dataGridView2.DataSource).Select());

var twoDataSources = ((DataTable)dataGridView1.DataSource).Select()
.Union(((DataTable)dataGridView2.DataSource).Select());


The first example contains each row in each table; the seconds contains all unique rows.

If you need more help please add the actual code that creates the datasources. (Of course they would have to be field-compatible..)

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