Odtnhj

In my event load of my form , I call a method loadDg:

private void form_Load(object sender, EventArgs e)

 loadDg();

and

private async Task loadDg()
 
 pictureLoading.Visible = true;
 await Task.Run(() => string datas = db.row("select * from products");
string datas2 = db.row("select * from users");
double one = Convert.ToInt32(datas[0]);
label1.Text = one.toString();
//....
);
pictureLoading.Visible = false; //hide gif animation 

in my code , db.row This method always returns only 1 row ( string array) , but my ui freezes still , i try update UI continuously with async without freeze at startup

There is nothing to prevent your code run asynchronously. pictureLoading will be invisible even before task is completed. You should fix cross-thread problem and logic of the UI as this:

private void form_Load(object sender, EventArgs e)

 pictureLoading.Visible = true;
 loadDg();



private async Task loadDg()


 await Task.Run(() =>
 
 string datas = db.row("select * from products");
 string datas2 = db.row("select * from users");
 double one = Convert.ToInt32(datas[0]);

 label1.BeginInvoke((Action)delegate ()
 
 label1.Text = one.toString();
 //hide gif animation 
 pictureLoading.Visible = false;
 );
 //....
 );

Unnecessarily jumping between threads/context should be avoided.

This is an with better resource usage:

private async void form_Load(object sender, EventArgs e)

 pictureLoading.Visible = true;

 try
 
 label1.Text = await LoadDgAsync();
 
 catch
 
 // error handling
 
 finally
 
 pictureLoading.Visible = false;
 



private Task<string> LoadDgAsync()

 return Task.Run(() =>
 
 string datas = db.row("select * from products");
 string datas2 = db.row("select * from users");
 double one = Convert.ToInt32(datas[0]);

 //....

 return one.toString();
 );

You are calling the loadDg() function synchronously.

Unless you await the loadDg() function call (since its return type is Task) and make the form_Load function asynchronous the function call will be synchronous.

The correct way to fix it is...

private async void form_Load(object sender, EventArgs e)

 await loadDg();