我有一个VB.net应用程序,该应用程序可以压缩JPG文件,对其进行重命名,然后将它们从一个位置复制到另一个位置。当最终用户使用该程序时,他们将打开两个文件浏览器窗口以获取源位置和目标位置,并将它们拖到文本框中。
我添加了打开两个文件浏览器以设置位置的代码,但是我希望一个窗口位于屏幕的左下角,另一个窗口位于右下角。每个尺寸将占据屏幕的1/4。
我发现的大多数东西都很老。我发现有人说无法做到这一点,而其他人则提供了非常旧的代码,这些代码似乎无法在Visual Studio 2019中很好地发挥作用。
Private Sub btnOpenExplorer_Click(sender As Object, e As EventArgs) Handles btnOpenExplorer.Click
Process.Start("explorer.exe", String.Format("/n, /e, {0}", "C:\Users\" & Environment.UserName & "\Box\Site Visit Photos"))
Process.Start("explorer.exe", String.Format("/n, /e, {0}", "P:\"))
End Sub
上面的代码运行良好。我只需要添加大小和位置。
问题
我认为在调用程序例程中很难做到这一点,btnOpenExplorer_Click
因为要获得一个分配了所有属性的流程对象还为时过早。通常,解决此问题所需的ProcessMainWindowTitle和Process.MainWindowHandle属性。一种解决方法是使调用方启动进程,并由Timer通过SetWindowPos函数进行定位和调整大小。
这是我的处理方式:
API函数
<DllImport("user32.dll", EntryPoint:="SetWindowPos")>
Private Shared Function SetWindowPos(ByVal hWnd As IntPtr, ByVal hWndInsertAfter As IntPtr, ByVal X As Integer, ByVal Y As Integer, ByVal cx As Integer, ByVal cy As Integer, ByVal uFlags As UInteger) As <MarshalAs(UnmanagedType.Bool)> Boolean
End Function
<DllImport("user32.dll")>
Private Shared Function IsIconic(hWnd As IntPtr) As <MarshalAs(UnmanagedType.Bool)> Boolean
End Function
<DllImport("user32.dll")>
Public Shared Function ShowWindow(hWnd As IntPtr, <MarshalAs(UnmanagedType.I4)> nCmdShow As Integer) As <MarshalAs(UnmanagedType.Bool)> Boolean
End Function
类级别常量和变量
Private Const HWND_TOP As Integer = &H0
Private Const SW_SHOWNORMAL As Integer = &H1
Private dir1, dir2 As String
Private WithEvents Timer1 As New Timer With {.Interval = 250}
流程查找器
Private Function GetExplorerProcess(title As String) As Process
Dim dirName As String = If(IO.Directory.Exists(title), New IO.DirectoryInfo(title).Name, title).ToLower
Return Process.GetProcesses.Where(
Function(a) a.ProcessName.ToLower.Equals("explorer") AndAlso
a.MainWindowTitle.ToLower.Equals(dirName)
).FirstOrDefault
End Function
呼叫者,召集者
Private Sub btnOpenExplorer_Click(sender As Object, e As EventArgs) Handles btnOpenExplorer.Click
Dim proc1 As Process = GetExplorerProcess(dir1)
If proc1 Is Nothing Then
Dim procInfo1 As New ProcessStartInfo With {
.FileName = "explorer.exe",
.Arguments = dir1,
.WindowStyle = ProcessWindowStyle.Normal
}
Process.Start(procInfo1)
End If
Dim proc2 As Process = GetExplorerProcess(dir2)
If proc2 Is Nothing Then
Dim procInfo2 As New ProcessStartInfo With {
.FileName = "explorer.exe",
.Arguments = dir2,
.WindowStyle = ProcessWindowStyle.Normal
}
Process.Start(procInfo2)
End If
Timer1.Start()
End Sub
计时器-激活Windows,同时设置大小和位置
Private Sub Timer1_Tick(sender As Object, e As EventArgs) Handles Timer1.Tick
Dim proc1 As Process = GetExplorerProcess(dir1)
Dim proc2 As Process = GetExplorerProcess(dir2)
If proc1 IsNot Nothing AndAlso proc2 IsNot Nothing Then
Timer1.Stop()
Dim R As Rectangle = Screen.PrimaryScreen.WorkingArea
Dim R1 As New Rectangle(R.X, R.Height - (R.Height / 3), R.Width / 2, R.Height / 4)
Dim R2 As New Rectangle(R1.Right, R1.Y, R1.Width, R1.Height)
Dim hWnd1 As IntPtr = proc1.MainWindowHandle
Dim hWnd2 As IntPtr = proc2.MainWindowHandle
'Restore the first window if its minimized.
If IsIconic(hWnd1) Then
ShowWindow(hWnd1, SW_SHOWNORMAL)
End If
'Set the size and location of the first window.
SetWindowPos(hWnd1, IntPtr.op_Explicit(HWND_TOP), R1.X, R1.Y, R1.Width, R1.Height, 0)
'Restore the second window if its minimized.
If IsIconic(hWnd2) Then
ShowWindow(hWnd2, SW_SHOWNORMAL)
End If
'Set the size and location of the second window.
SetWindowPos(hWnd2, IntPtr.op_Explicit(HWND_TOP), R2.X, R2.Y, R2.Width, R2.Height, 0)
End If
End Sub
经过四处搜寻之后,我想出了一种更好的方法(我认为),方法是使用Microsoft Internet控件-SHDocVw组件。
首先,我们需要添加对该COM组件的引用:
References
节点,然后选择Add Reference
。COM
选项卡。Microsoft Internet Controls
然后单击确定。我们只需要从solution1的API和常量,以及一个新的函数来获取IE窗口:
Private Function GetIE(dir As String) As SHDocVw.InternetExplorer
Return (From ie In New SHDocVw.ShellWindows
Where New Uri(DirectCast(ie, SHDocVw.InternetExplorer).LocationURL).LocalPath.Equals(dir, StringComparison.OrdinalIgnoreCase)
Select DirectCast(ie, SHDocVw.InternetExplorer)).FirstOrDefault
End Function
最后,调用者:
Private Sub btnOpenExplorer_Click(sender As Object, e As EventArgs) Handles btnOpenExplorer.Click
Dim dir1 As String = "FirstPath"
Dim dir2 As String = "SecondPath"
Dim ie1, ie2 As SHDocVw.InternetExplorer
If Not IO.Path.GetPathRoot(dir1).Equals(dir1, StringComparison.OrdinalIgnoreCase) Then
dir1 = dir1.TrimEnd(IO.Path.DirectorySeparatorChar)
End If
If Not IO.Path.GetPathRoot(dir2).Equals(dir2, StringComparison.OrdinalIgnoreCase) Then
dir2 = dir2.TrimEnd(IO.Path.DirectorySeparatorChar)
End If
ie1 = GetIE(dir1)
ie2 = GetIE(dir2)
If ie1 Is Nothing OrElse ie2 Is Nothing Then
Process.Start(dir1)
Process.Start(dir2)
Threading.Thread.Sleep(1000)
End If
If ie1 Is Nothing Then ie1 = GetIE(dir1)
If ie2 Is Nothing Then ie2 = GetIE(dir2)
If ie1 IsNot Nothing AndAlso ie2 IsNot Nothing Then
Dim hWnd1 = IntPtr.op_Explicit(ie1.HWND)
Dim hWnd2 = IntPtr.op_Explicit(ie2.HWND)
Dim R As Rectangle = Screen.PrimaryScreen.WorkingArea
Dim R1 As New Rectangle(R.X, R.Height - (R.Height \ 3), R.Width \ 2, R.Height \ 4)
Dim R2 As New Rectangle(R1.Right, R1.Y, R1.Width, R1.Height)
SetWindowPos(hWnd1, IntPtr.op_Explicit(HWND_TOP), R2.X, R2.Y, R2.Width, R2.Height, 0)
SetWindowPos(hWnd2, IntPtr.op_Explicit(HWND_TOP), R1.X, R1.Y, R1.Width, R1.Height, 0)
If IsIconic(hWnd1) Then
ShowWindow(hWnd1, SW_SHOWNORMAL)
End If
If IsIconic(hWnd2) Then
ShowWindow(hWnd2, SW_SHOWNORMAL)
End If
End If
End Sub
请注意,该解决方案也可用于驱动器(IE:c:\
,d:\
.. etc。),而第一个驱动器则不行。
这是一个演示:
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