如何在更新后刷新c# dataGridView？

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DataGridView dg1 = new DataGridView();
dg1.DataSource = src1;
// Update Data in src1
dg1.DataSource = null;
dg1.DataSource = src1;

List<string> users = GetUsers();
BindingSource source = new BindingSource();
source.DataSource = users;
dataGridView1.DataSource = source;

users = GetUsers(); //Update your data object
source.ResetBindings(false);

public void ConnectAndPopulateDataGridView(DataGridView dataGridView)
{ }

ChildForm.ShowDialog();
ConnectAndPopulateDataGridView(dataGridView1);

     using (SqlConnection conn = new SqlConnection(connectionString))
            using (SqlDataAdapter ad = new SqlDataAdapter("SELECT * FROM Table", conn))
               DataTable dt = new DataTable();
                 ad.Fill(dt);
               dataGridView1.DataSource = dt;
        }

    private void RefreshGridView()
        if (dataGridView1.InvokeRequired)
            dataGridView1.Invoke((MethodInvoker)delegate ()
                RefreshGridView();
            dataGridView1.Refresh();
    }

var newEntry = new MyClassObject();
var bindingSource = dataGridView.DataSource as BindingSource;
var myClassObjects = bindingSource.DataSource as List<MyClassObject>;
myClassObjects.Add(newEntry);
bindingSource.DataSource = myClassObjects;
dataGridView.DataSource = null;
dataGridView.DataSource = bindingSource;
dataGridView.Update();
dataGridView.Refresh();

//declare your list
private BindingList<myclass> mMyList = new BindingList<myclass>();
//then bind it to your datagrid, i usually do it on the Load event
private void Form1_Load(object sender, EventArgs e)
    _dgMyDatagrig.DataSource = mMyList;
//start populating your list 
private void addItem(mycclass item)

如何在更新后刷新c# dataGridView？

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