我有一个按钮,点击事件会从服务器获取数据并将其显示在网格上。
代码如下:
private void btnSearch_Click(object sender, EventArgs e)
{
// Here I should do something in order to know if the async ProcessSearch method is busy..
// if not busy then I will execute it if not then I will return.
// shows loading animation
ShowPleaseWait(Translate("Searching data. Please wait..."));
ProcessSearch();
}
private async void ProcessSearch()
{
Data.SeekWCF seekWcf = new Data.SeekWCF();
_ds = await seekWcf.SearchInvoiceAdminAsync(new Guid(cboEmployer.Value.ToString()), new Guid(cboGroup.Value.ToString()), txtSearchInvoiceNumber.Text, chkSearchLike.Checked, txtSearchFolio.Text, Convert.ToInt32(txtYear.Value));
seekWcf.Dispose();
if (_ds != null)
{
SetupInvoiceGrid();
}
// hides the loading animation
HidePleaseWait();
}
我如何知道异步方法 ProcessSearch 是忙还是正在运行,以便在再次单击按钮时阻止用户再次执行该方法。