我收到“因为未等待此电话...”
SendPostAsync(CustomerName, email, Phone, maxImages, MainEventName, MainEventCode, CLemail, package_type, PlayerInfo, template_ID, favoritesArray);
在此单击按钮：
private void btnCopyAllInvoices_Click(object sender, EventArgs e)
{
//sets up a list to store the incoming invoice numbers from the DB
List<string> InvoiceNums = new List<string>();
mySqlInterface.Connect();
InvoiceNums = mySqlInterface.GetNewInvoices();
//prep the visuals
lblStatus.Text = "";
InvoicePanel.Visible = true;
progressBarInvoice.Value = 0;
progressBarInvoice.Maximum = InvoiceNums.Count;
//for each invoice collected let's copy it
InvoiceNums.ForEach(delegate(string inv)
{
if (OrderDAL.CheckOrderExist(inv))
{
// the order already exist
Order myorder = new Order();
myorder = OrderDAL.GetOrder(inv);
CopyImages(myorder, true);
OrderDAL.UpdateFulfillment(string.Format("Images Copied"), inv);
}
});
//let the user know how we did
MessageBoxButtons buttons = MessageBoxButtons.OK;
string strError = string.Format("{0} Invoices copied.", InvoiceNums.Count);
MessageBox.Show(this, strError, "Copy New Invoices", buttons, MessageBoxIcon.Information, MessageBoxDefaultButton.Button1);
InvoicePanel.Visible = false;
}
在这里，CopyImages被称为上述foreach循环的一部分。
public void CopyImages(Order order, bool CopyAllInv)
{
string baseTarget = WorkSpace.Text;
string CLhotfolderTarget = string.Empty;
//check to see if the order has been photo released. If it has add "pr" to the end of the invoice number
string prInvoice = "";
if (order.Header.SignatureLine != "null" && order.Header.SignatureChecks != "null")
{
prInvoice = "pr";
}
string PackageName = null;
string CustomerName = null;
string Phone = null;
string email = null;
string PlayerInfo = null;
string PlayerName = null;
string PlayerNumber = null;
string MainEventName = null;
string MainEventCode = null;
string CLemail = null;
//go to the DB and get the info
mySqlInterface.Connect();
bool videoPackage = mySqlInterface.VideoInfo(order.Header.InvoiceNumber, out PackageName, out CustomerName, out Phone, out email, out PlayerName, out PlayerNumber, out MainEventName, out MainEventCode);
mySqlInterface.Close();
if (videoPackage)
{
if (PackageName.Contains("Video") || PackageName.Contains("Ultimate Ripken"))
{
CLemail = MainEventCode + "_" + email.Replace("@", "_").Replace(".", "_").Replace("+", "_");
PlayerInfo = PlayerName + " " + PlayerNumber;
int template_ID = 0;
if (txtCLtemplateID.Text != "")
{
template_ID = Convert.ToInt32(txtCLtemplateID.Text);
}
//we will always need a hotfolder. So let's set and create it now
CLhotfolderTarget = txtCLhotfolder.Text + "\\toUpload\\" + CLemail;
if (!System.IO.Directory.Exists(CLhotfolderTarget))
{
// create the directory
System.IO.Directory.CreateDirectory(CLhotfolderTarget);
}
int maxImages = 7;
int package_type = 2;
string[] favoritesArray = new string[maxImages];
//populate the array of images for the video
int count = 0;
foreach (Order.InvoiceImages image in order.ImageList)
{
favoritesArray[count] = image.ImageName;
count++;
}
//let's call the API and send info to CL
SendPostAsync(CustomerName, email, Phone, maxImages, MainEventName, MainEventCode, CLemail, package_type, PlayerInfo, template_ID, favoritesArray);
}
}
}
public async Task SendPostAsync(string name, string email, string phone, int photo_count, string event_name, string event_id, string dir_name, int package_type, string video_text, int template_id, string[] favoritesArray)
{
string postURL = null;
string token = null;
int delivery_method = 2;
//production
postURL = "https://search.apicall.com/photographer/customer";
token = "token xxxxxxxxxxxxxxxxxxxxx";
HttpClient client = new HttpClient();
client.BaseAddress = new Uri(postURL);
client.DefaultRequestHeaders.Add("Authorization", token);
string POSTcall = JsonConvert.SerializeObject(new { name, email, phone, photo_count, event_id, event_name, dir_name, package_type, video_text, delivery_method, template_id, favorites = favoritesArray });
//Send string to log file for debug
WriteLog(POSTcall);
StringContent stringContent = new StringContent(POSTcall, UnicodeEncoding.UTF8, "application/json");
HttpResponseMessage response = await client.PostAsync(new Uri(postURL), stringContent);
string POSTresponse = await response.Content.ReadAsStringAsync();
WriteLog(POSTresponse);
//simplified output for debug
if (POSTresponse.Contains("error") && POSTresponse.Contains("false"))
{
lblStatus.Text = "Error Sending to CL";
}
else
{
lblStatus.Text = "Successfully added to CL";
}
}
我正在等待HttpResponseMessage response = await client.PostAsync
如果我一次运行该程序，它将起作用。但是，当我循环执行此操作时，又有很多背靠背的感觉，我认为PostAsyncs正在逐步发展。我在WriteLog中缺少整个物品。
似乎我需要在上游进行异步/唤醒，对吗？这样，我可以运行整个方法。
答案 0 :(得分：0)
引用Async/Await - Best Practices in Asynchronous Programming，事件处理程序允许async void，因此重构代码以使其始终保持异步状态。
重构CopyImages以等待数据发布
public async Task CopyImages(Order order, bool CopyAllInv) {
//...omitted for brevity
if (videoPackage) {
if (PackageName.Contains("Video") || PackageName.Contains("Ultimate Ripken")) {
//...omitted for brevity
await SendPostAsync(CustomerName, email, Phone, maxImages, MainEventName, MainEventCode, CLemail, package_type, PlayerInfo, template_ID, favoritesArray);
}
}
}
并更新事件处理程序
private async void btnCopyAllInvoices_Click(object sender, EventArgs e) {
//sets up a list to store the incoming invoice numbers from the DB
List<string> InvoiceNums = new List<string>();
mySqlInterface.Connect();
InvoiceNums = mySqlInterface.GetNewInvoices();
//prep the visuals
lblStatus.Text = "";
InvoicePanel.Visible = true;
progressBarInvoice.Value = 0;
progressBarInvoice.Maximum = InvoiceNums.Count;
//for each invoice collected let's copy it
foreach(string inv in InvoiceNums) {
if (OrderDAL.CheckOrderExist(inv)) {
// the order already exist
Order myorder = OrderDAL.GetOrder(inv);
await CopyImages(myorder, true);
OrderDAL.UpdateFulfillment(string.Format("Images Copied"), inv);
}
}
//let the user know how we did
MessageBoxButtons buttons = MessageBoxButtons.OK;
string strError = string.Format("{0} Invoices copied.", InvoiceNums.Count);
MessageBox.Show(this, strError, "Copy New Invoices", buttons, MessageBoxIcon.Information, MessageBoxDefaultButton.Button1);
InvoicePanel.Visible = false;
}
我也建议不要为每个帖子请求创建一个HttpClient。提取出来并使用一个客户端。
static Lazy<HttpClient> httpClient = new Lazy<HttpClient>(() => {
var postURL = "https://search.apicall.com/photographer/customer";
var token = "token xxxxxxxxxxxxxxxxxxxxx";
HttpClient client = new HttpClient();
client.BaseAddress = new Uri(postURL);
client.DefaultRequestHeaders.Add("Authorization", token);
return client
});
public async Task SendPostAsync(string name, string email, string phone, int photo_count, string event_name, string event_id, string dir_name, int package_type, string video_text, int template_id, string[] favoritesArray)
{
var postURL = "https://search.apicall.com/photographer/customer";
int delivery_method = 2;
string POSTcall = JsonConvert.SerializeObject(new { name, email, phone, photo_count, event_id, event_name, dir_name, package_type, video_text, delivery_method, template_id, favorites = favoritesArray });
//Send string to log file for debug
WriteLog(POSTcall);
StringContent stringContent = new StringContent(POSTcall, UnicodeEncoding.UTF8, "application/json");
HttpResponseMessage response = await httpClient.Value.PostAsync(new Uri(postURL), stringContent);
string POSTresponse = await response.Content.ReadAsStringAsync();
WriteLog(POSTresponse);
//simplified output for debug
if (POSTresponse.Contains("error") && POSTresponse.Contains("false")) {
lblStatus.Text = "Error Sending to CL";
} else {
lblStatus.Text = "Successfully added to CL";
}
}