发布：2021/10/22 16:57:36作者：管理员 来源：本站 浏览次数：979
我有以下Async方法：
private async void ProcessSearch()
{
// get catalogs on first search
if (_invoiceTypes == null && _invoiceAccounts == null)
{
var confWcf = new Data.ConfigurationWCF();
_invoiceTypes = await confWcf.GetInvoiceTypesAsync(MainForm.State.Entity);
_invoiceAccounts = await confWcf.GetInvoiceAccountsAsync(MainForm.State.Entity);
confWcf.Dispose();
}
var seekWcf = new DataSeekWCF();
_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();
}
}
在_invoiceTypes,_invoiceAccounts和_ds完成之前,我不想执行SetupInvoiceGrid.
任何线索？我做得对吗？我应该使用Task而不是等待吗？
我已经想出了这个代码似乎正在工作,看起来很好,但我不知道它是否正确：
private void btnSearch_Click(object sender, EventArgs e)
{
lock (lockObj)
{
if (_isBusy)
return;
else
_isBusy = true;
}
ShowPleaseWait(Translate("Searching data. Please wait..."));
if (_invoiceTypes == null && _invoiceAccounts == null)
{
var t = GetCatalogs();
t.ContinueWith(t2 =>
{
if (t.IsCompleted) ProcessSearch();
});
}
else
{
ProcessSearch();
}
}
private async Task GetCatalogs()
{
// get catalogs on first search
Data.ConfigurationWCF confWcf = new Data.ConfigurationWCF();
var task1 = confWcf.GetInvoiceTypesAsync(1);
var task2 = confWcf.GetInvoiceAccountsAsync(1);
confWcf.Dispose();
await Task.WhenAll(task1, task2);
_invoiceTypes = task1.Result;
_invoiceAccounts = task2.Result;
if (_invoiceTypes != null)
{
cboInvoiceType.DataSource = _invoiceTypes.Tables["invoice_types"];
cboInvoiceType.DisplayMember = "description";
cboInvoiceType.ValueMember = "code";
}
}
private async void ProcessSearch()
{
var 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();
}
HidePleaseWait();
}
最佳答案
我回答了关于如何处理ProcessSearchAsync本身 here的完成的原始(？)问题.
要并行运行任务(如评论中所述),这里修改了代码,因为invoiceTypes == null和_invoiceAccounts == null检查,它会变得有点复杂.注意下面实现检查的方式稍微改变了逻辑(之前只有当_invoiceTypes和_invoiceAccounts都为null时才会调用WCF – 如果只有其中一个为null,那么它是什么？)：
private async Task ProcessSearchAsync()
{
Data.ConfigurationWCF confWcf = new Data.ConfigurationWCF();
Task</*typeof _invoiceTypes*/> t1;
Task</*typeof _invoiceAccounts*/> t2;
if (_invoiceTypes == null)
t1 = confWcf.GetInvoiceTypesAsync(MainForm.State.Entity);
else
{
var tsc1 = new TaskCompletionSource</*typeof _invoiceTypes*/>();
t1 = tsc1.Task;
tsc1.SetResult(_invoiceTypes);
}
if ( _invoiceAccounts == null )
t2 = confWcf.GetInvoiceAccountsAsync(MainForm.State.Entity);
else
{
var tsc2 = new TaskCompletionSource</*typeof _invoiceAccounts*/>();
t2 = tsc2.Task;
tsc2.SetResult(_invoiceAccounts);
}
DataSeekWCF seekWcf = new DataSeekWCF();
Task</*typeof _ds*/> t3 = seekWcf.SearchInvoiceAdminAsync(new Guid(cboEmployer.Value.ToString()), new Guid(cboGroup.Value.ToString()), txtSearchInvoiceNumber.Text, chkSearchLike.Checked, txtSearchFolio.Text, Convert.ToInt32(txtYear.Value));
await Task.WhenAll(new Task[] {t1, t2, t3});
_invoiceTypes = t1.Result;
_invoiceAccounts = t2.Result;
ds = t3.Result;
if (_ds != null)
{
SetupInvoiceGrid();
}
confWcf.Dispose();
seekWcf.Dispose();
}
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