[To be organized] Windows Forms Key Points

Aug 4, 2023#Windows Forms20

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Cross-thread access to UI controls should be done in a thread-safe manner to avoid issues such as deadlock, resource contention, and hanging. Microsoft recommends two ways to achieve this: How to make thread-safe calls to controls (Windows Forms .NET). To prevent flickering when scrolling horizontally in a DataGridView, one can refer to How to prevent DataGridView from flickering when scrolling horizontally? - Stack Overflow. Frequent use of Refresh() in a DataGridView may cause the right scroll bar to become black and unusable, in which case re-binding the DataSource is recommended.

In general, only the thread that creates the control can access the control, otherwise it may cause deadlocks, resource competition, suspension, or pause issues. Cross-thread access to UI controls should be done in a thread-safe manner, Microsoft has introduced two ways: How to make thread-safe calls to controls (Windows Forms .NET).

Flickering issue when scrolling DataGridView: How to prevent DataGridView from flickering when scrolling horizontally? - Stack Overflow.

Frequent use of Refresh() in DataGridView can cause the right scroll bar to become black and unusable, in this case, relying on Refresh() to redraw the control is not feasible, you can rebind the DataSource:

// Access UI controls across threads in a thread-safe manner
dataGridView1.Invoke(() =>
{
    dataGridView1.DataSource = null;
    dataGridView1.DataSource = _dataTable;
});