本文整理匯總了C#中System.IAsyncResult.IsCompleted屬性的典型用法代碼示例。如果您正苦於以下問題：C# IAsyncResult.IsCompleted屬性的具體用法？C# IAsyncResult.IsCompleted怎麽用？C# IAsyncResult.IsCompleted使用的例子？那麽, 這裏精選的屬性代碼示例或許可以為您提供幫助。您也可以進一步了解該屬性所在類System.IAsyncResult的用法示例。
在下文中一共展示了IAsyncResult.IsCompleted屬性的3個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的C#代碼示例。
示例1: TestMethod
//引入命名空間
using System;
using System.Threading;
namespace Examples.AdvancedProgramming.AsynchronousOperations
{
public class AsyncDemo
{
// The method to be executed asynchronously.
public string TestMethod(int callDuration, out int threadId)
{
Console.WriteLine("Test method begins.");
Thread.Sleep(callDuration);
threadId = Thread.CurrentThread.ManagedThreadId;
return String.Format("My call time was {0}.", callDuration.ToString());
}
}
// The delegate must have the same signature as the method
// it will call asynchronously.
public delegate string AsyncMethodCaller(int callDuration, out int threadId);
}示例2: Main
//引入命名空間
using System;
using System.Threading;
namespace Examples.AdvancedProgramming.AsynchronousOperations
{
public class AsyncMain
{
static void Main() {
// The asynchronous method puts the thread id here.
int threadId;
// Create an instance of the test class.
AsyncDemo ad = new AsyncDemo();
// Create the delegate.
AsyncMethodCaller caller = new AsyncMethodCaller(ad.TestMethod);
// Initiate the asychronous call.
IAsyncResult result = caller.BeginInvoke(3000,
out threadId, null, null);
// Poll while simulating work.
while(result.IsCompleted == false) {
Thread.Sleep(250);
Console.Write(".");
}
// Call EndInvoke to retrieve the results.
string returnValue = caller.EndInvoke(out threadId, result);
Console.WriteLine("\nThe call executed on thread {0}, with return value \"{1}\".",
threadId, returnValue);
}
}
}輸出：
Test method begins. ............. The call executed on thread 3, with return value "My call time was 3000.".
示例3: Main
//引入命名空間
using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Data.SqlClient;
using System.Runtime.Remoting.Messaging;
using System.Threading;
class Program {
static void Main(string[] args) {
SqlConnection cn = new SqlConnection();
cn.ConnectionString = "uid=sa;pwd=;Initial Catalog=Cars;Asynchronous Processing=true;Data Source=(local)";
cn.Open();
string strSQL = "WaitFor Delay '00:00:02';Select * From Inventory";
SqlCommand myCommand = new SqlCommand(strSQL, cn);
IAsyncResult itfAsynch;
itfAsynch = myCommand.BeginExecuteReader(CommandBehavior.CloseConnection);
while (!itfAsynch.IsCompleted) {
Console.WriteLine("Working on main thread...");
Thread.Sleep(1000);
}
SqlDataReader myDataReader = myCommand.EndExecuteReader(itfAsynch);
while (myDataReader.Read()) {
Console.WriteLine("-> Make: {0}, PetName: {1}, Color: {2}.",
myDataReader["Make"].ToString().Trim(),
myDataReader["PetName"].ToString().Trim(),
myDataReader["Color"].ToString().Trim());
}
myDataReader.Close();
}
}