Question

我有一个使用以下函数调用进行点击的表单：

create table #tempStatus (EmpId int, intTime datetime, sStatus int)        
insert into #tempStatus        
values(1, '2018-05-26 08:44', 1),        
    (1, '2018-05-26 08:44', 2),        
    (2, '2018-05-28 08:44', 1),        
    (2, '2018-05-28 12:44', 2),            
    (1, '2018-05-21 08:44', 1),        
    (1, '2018-05-21 10:44', 2),            
    (2, '2018-05-23 08:44', 1),        
    (2, '2018-05-23 08:44', 2)  
    ,(3, '2018-05-23 08:44', 1)  

select EmpId, MIN(intTime) as intTime, MAX(intTime) as OutTime into #tempA from (      
select EmpId, intTime, intTime as OutTime      
from #tempStatus where sStatus = 1      
)a       
group by EmpId, intTime      

update s      
set s.OutTime = t.outTime      
from #tempA s      
left join     
(    
select EmpId, MAX(outTime) as outTime from(       
select EmpId, intTime as outTime      
from #tempStatus where sStatus = 2      
)b       
group by empId,outTime) t     
on s.EmpId = t.EmpId and Convert(Varchar,s.OutTime,112) =  Convert(Varchar,t.outTime,112)      

select * from #tempA order by EmpId      

drop table #tempA      
DROP TABLE #tempStatus

这很好，但是当我尝试使用SetWindowLong(Handle, GWL_EXSTYLE, (IntPtr)(GetWindowLong(Handle, GWL_EXSTYLE) ^ WS_EX_LAYERED ^ WS_EX_TRANSPARENT)); SetLayeredWindowAttributes(Handle, 0, 0xFF, LWA_ALPHA);属性淡出该窗口时，出现以下异常：

System.Windows.Forms.Form.Opacity

我如何同时实现这两件事？

Answer 1

以下内容适用于Windows窗体

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace WindowsFormsApplication30
{
    public partial class Form1 : Form
    {

        [DllImport("user32.dll", SetLastError = true)]
        static extern System.UInt32 GetWindowLong(IntPtr hWnd, int nIndex);
        [DllImport("user32.dll", EntryPoint = "SetWindowLong")]
        private static extern int SetWindowLong32(IntPtr hWnd, int nIndex, uint dwNewLong);
        [DllImport("user32.dll", CharSet = CharSet.Ansi, SetLastError = true)]
        static extern int SetLayeredWindowAttributes(IntPtr hWnd, int crKey, byte bAlpha, uint dwFlags);



        public const int GWL_EXSTYLE = -20;
        public const uint WS_EX_LAYERED = 0x80000;
        public const uint LWA_ALPHA = 0x2;
        public const uint LWA_COLORKEY = 0x1;
        public Form1()
        {
            InitializeComponent();

            IntPtr Handle = this.Handle;
            UInt32 windowLong = GetWindowLong(Handle, GWL_EXSTYLE);
            SetWindowLong32(Handle, GWL_EXSTYLE, (uint)(windowLong ^ WS_EX_LAYERED));
            SetLayeredWindowAttributes(Handle, 0, 128, LWA_ALPHA);
        }
    }
}

淡入WS_EX_LAYERED形式

1 个答案: