接受datagridview上的更改作为列表框更改中的选定项

Question

I'm struggling with with accepting changes to my datagridview.

I have a listbox and a datagridview. My datagridview changes based on the selected index which is selecte from the listbox. However, each time I select a different item, the datagridview items goes back to the original view/list.

My question: How can I accept/write changes back to my datatable or prevent the datagridview from refreshing everytime I select an item from the listbox?

The code for my listbox change event is:

        private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
    {
        DataRow[] result = ds.Tables["AssessmentItems"].Select("GroupId = " + listBox1.SelectedIndex);

        var newTable = result.CopyToDataTable();
        BindingSource bindSource = new BindingSource();
        bindSource.DataSource = newTable;
        dataGridView1.DataSource = bindSource;
    }

Answer 1

dataGridView1.databind();

我认为需要在gridview中进行更新以进行新更改。

Answer 2

Just set Filter property of bindingsource . But you need to declare bindingsource as you can use from any method in your class.

private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
{
    bindSource.Filter = "GroupId = " + listBox1.SelectedIndex;
}

Answer 3

so if you want to export your source, dont refresh it, filter it. BindingSource has a .Filter method which will help you. change your event to this. done!

 private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
{
    BindingSource bindSource = new BindingSource();
    bindSource.DataSource = yourOrginalSource;
    dataGridView1.DataSource = bindSource;
    //set your bind source filter
    string myFilter = "GroupId = " + listBox1.SelectedIndex;
    source.Filter = myFilter;
}