nce"]); let sDate = new Date(stat.mtimeMs); let time_client = Math.floor(cDate.getTime()/1000); let time_server = Math.floor(sDate.getTime()/1000); if(time_client < time_server){ sendToClient(); }else{
示结果很可能为0,因此,这时候很可能获取不到文件的播放时间长度,容易出错。所以在利用的时候可以加一个timer控件: Private Sub Timer1_Tick(ByVal sender As Object, ByVal e As System.EventArgs) Handles Timer1.Tick EndPoint = AxWindowsMediaPlayer1.currentMedia.duration If EndPoint = 0 Then Exit Sub '可能因为媒体文件的打开需要一定时间,这里等待媒体文件的打开 msgbox(AxWindow
orms;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Reflection;
namespace DuoYeMianIE
{
static class Program
{
/// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main()
{
2:15 * @returns {string} */function getCurrentDateTime(){ var date=new Date(); var year=date.getFullYear(); var month=date.getMonth()+1; var day=date.getDate(); var hours=date.getHours(); var minutes=date.getMinutes(); var seconds=date.getSeconds(); return year+"-"+formatZer
SecurityDescriptorLength; public System.Runtime.InteropServices.ComTypes.FILETIME CreateTime; } [StructLayout(LayoutKind.Sequential)] public struct OBJECT_TYPE_INFORMATION { // Information Class 2 public UNICODE_STRING Name; public int ObjectCount; public int
DllImport是System.Runtime.InteropServices命名空间下的一个属性类,其功能是提供从非托管DLL导出的函数的必要调用信息DllImport属性应用于方法,要求最少要提供包含入口点的dll的名称。DllImport的定义如下:[AttributeUsage(AttributeTargets.Method)]
public class DllImportAttribute: System.Attribute
{
public DllImportAttribute(string dllName) {…} //定位参数为dllName
pub
xt;
using System.Windows.Forms;
using System.Runtime.InteropServices;
namespace KoalaStudio.BookshopManager
{
public class HotKey
{
//如果函数执行成功,返回值不为0。
//如果函数执行失败,返回值为0。要得到扩展错误信息,调用GetLastError。
[DllImport("user32.dll", SetLastError = true)]
Type type = Type.GetType("Mono.Runtime");if (type != null){ MethodInfo displayName = type.GetMethod("GetDisplayName",BindingFlags.NonPublic | BindingFlags.Static); if (displayName != null) Debug.Log(displayName.Invoke(null, n
下图所示:上述key lookup其所消耗的时间如下所示:SQL Server Execution Times: CPU time = 2995 ms, elapsed time = 10694 ms. SQL Server parse and compile time: CPU time = 0 ms, elapsed time = 0 ms.在上述查询中,之所以要使用with (index (SalesOrderDetail_test_NCL_Price))这个语句,是为了强制其使用SalesOrderDetail_test_NCL_Price这个非聚集索引,通过非聚集索引找到了聚集索
句执行情况的方法介绍。一、设置STATISTICSSTATISTICS选项有PROFILE,IO ,TIME。SET STATISTICS PROFILE ON:显示每个查询执行后的结果集,代表查询执行的配置文件。SET STATISTICS IO ON:报告与语句内引用的每个表的扫描数、逻辑读取数(在高速缓存中访问的页数)和物理读取数(访问磁盘的次数)有关的信息。SET STATISTICS TIME ON:显示分析、编译和执行查询所需的时间(以毫秒为单位)。使用方法:SET STATISTICS PROFILE ON SET STATISTICS IO ON SET STATISTICS
yyyymmdd HH24:MI:SS') ;MySql:select fullName,addedTime FROM t_user where addedTime >='2017-1-1 00:00:00' and addedTime < '2018-1-1 00:00:00';PostgreSql:select * from user_info where create_date >= '2015-07-01' and create_date < '2015-08-15';SqlLite:select * from table1 where t1>='2017-6-1' and t1<
ng System;using System.Management;using System.Runtime.InteropServices;public class getIP{ [DllImport("Iphlpapi.dll")] private static extern int SendARP(int dest, int host, ref long mac, ref int length); [DllImport("Ws2_32.dll")] private static extern int inet_addr(string ip); //获取本机
System;
using System.Text;
//方法一
using System.Runtime.InteropServices;
//方法二 Net2.0新增类库
using System.Net.NetworkInformation;
namespace Walkthrough
{
public class Win32API
{
[DllImport("wininet.dll")]
private extern static bool InternetGetConnectedState(int Description, in
ength>
<percentage>
<angel>
<time>
<frequency>
<fraction>
<grid>
长度(length)
em
ex
ch
rem
vw
vh
vm
cm
mm
in
pt
pc
px
角度(angle)
deg
grad
rad
turn
时间(Time)
s
ms
频率(Frequency)
hz
khz
布局(