Question

I’m a beginner in C# and .NET am I am having the following problem (using .NET 4.5):

I have three DataGridViews which should display data from a xml file. Each DataGrid should filter its results, so they xml entries are spread over three DataGridViews.

I tried the following:

DataSet dataSet1 = new DataSet();
dataSet1.ReadXml('some-existing-file.xml');

DataTableCollection tables = dataSet1.Tables;
DataView view1 = new DataView(tables[0]);

BindingSource source1 = new BindingSource();
source1.DataSource = view1;
source1.Filter = "color = 'red'";
gridView1.DataSource = source1;

BindingSource source2 = new BindingSource();
source2.DataSource = view1;
source2.Filter = "color = 'white'";
gridView2.DataSource = source2;

BindingSource source3 = new BindingSource();
source3.DataSource = view1;
source3.Filter = "color = 'blue'";
gridView3.DataSource = source3;

But this does not work. All three GridViews use the last filter (‘blue)’.

The XML looks like this (simplified):

<?xml version="1.0" encoding="utf-8"?>
<collection>
    <entry>
        <color>blue</color>
        <headline>Some headline</headline>
    </entry>
    [...]
</collection>

And is just filtering the same dataset the right way when I want to write changes back to the xml file?

Answer 1

Take three view as I think all three filters are applied on view and you get output showing the the result of last filter. You can later improve it, if it works

DataView view1 = new DataView(tables[0]);
DataView view2 = new DataView(tables[0]);
DataView view3 = new DataView(tables[0]);


BindingSource source1 = new BindingSource();
source1.DataSource = view1;
source1.Filter = "color = 'red'";
gridView1.DataSource = source1;

BindingSource source2 = new BindingSource();
source2.DataSource = view2;
source2.Filter = "color = 'white'";
gridView2.DataSource = source2;

BindingSource source3 = new BindingSource();
source3.DataSource = view3;
source3.Filter = "color = 'blue'";
gridView3.DataSource = source3;