设置openfiledialog/savefiledialog的起始位置

我怀疑你能做的最好是确保你使用 overload of ShowDialog 接受一个 IWin32Window 用作父级。这个 可以 帮助它选择合适的位置;最常见的是:

using(var dlg = new OpenFileDialog()) {
    .... setup
    if(dlg.ShowDialog(this) == DialogResult.OK) {
        .... use
    }
}

退房 this article 在代码项目上。Excerpt:

这是当handy.net NativeWindow出现在图片中, NativeWindow是一个窗口包装器,其中 它处理由 与之关联的句柄。它创造了一个 NativeWindow和Associates 它的OpenFileWindow句柄。从这个 点,发送到的每条消息 OpenFileWindow将被重定向到 我们自己的wndproc方法 相反,我们可以 取消、修改或让他们通过 通过。

在我们的wndproc中,我们处理消息 wm_windowposchanging.如果打开 对话正在打开,然后我们将更改 原始水平或垂直 大小取决于惊吓位置 由用户设置。它将增加 要创建的窗口的大小。这个 当控件为 开的。

另外,我们将处理消息 显示窗口。这里,所有控件 原始OpenFileDialog中有 创建,我们将附加 打开文件对话框的控件。 这是通过调用Win32 API来完成的。 父母们。此API允许您更改 父窗口。那么,基本上 它的作用是附加我们的控制 到原始的OpenFileDialog 设置的位置,取决于 StartLocation属性的值。

它的优点是我们仍然 完全控制 附加到的控件 OpenFileDialog窗口。这意味着我们 可以接收事件、调用方法和 我们想怎么做就怎么做 控制。

我昨天大部分时间都有这个问题。鲍伯的回答对我帮助最大(谢谢鲍伯)。

甚至可以创建一个私有方法,该方法创建一个窗口并在 dialog.ShowDialog() 方法调用,它仍将使 OpenFileDialog .

private void openFileDialogWindow()
{
    Window openFileDialogWindow = new Window();
    openFileDialogWindow.Left = this.Left;
    openFileDialogWindow.Top = this.Top;
    openFileDialogWindow.Width = 0;
    openFileDialogWindow.Height = 0;
    openFileDialogWindow.WindowStyle = WindowStyle.None;
    openFileDialogWindow.ResizeMode = ResizeMode.NoResize;
    openFileDialogWindow.WindowStartupLocation = WindowStartupLocation.CenterScreen;

    openFileDialogWindow.Show();
    openFileDialogWindow.Close();

    openFileDialogWindow = null;
}

然后在 ShowDialog() 方法。

public string SelectWebFolder()
{
    string WebFoldersDestPath = null;

    CommonOpenFileDialog filePickerDialog = new CommonOpenFileDialog();
    // OpenFileDialog Parameters..

    openFileDialogWindow();

    if (filePickerDialog.ShowDialog() == CommonFileDialogResult.Ok)
    {
        WebFoldersDestPath = filePickerDialog.FileName + "\\";
    }

    filePickerDialog = null;

    return WebFoldersDestPath;
}

openfiledialog和savefiledialog将自己定位在 最近显示的窗口的工作区。所以在创建和显示对话框之前,只需创建一个新的不可见窗口,该窗口位于希望对话框出现的位置。

Window dialogPositioningWindow = new Window();
dialogPositioningWindow.Left = MainWindow.Left + <left position within main window>;
dialogPositioningWindow.Top  = MainWindow.Top  + <top  position within main window>;
dialogPositioningWindow.Width = 0; 
dialogPositioningWindow.Height = 0; 
dialogPositioningWindow.WindowStyle = WindowStyle.None;
dialogPositioningWindow.ResizeMode = ResizeMode.NoResize;
dialogPositioningWindow.Show();// OpenFileDialog is positioned in the upper-left corner
                               // of the last shown window (dialogPositioningWindow)
Microsoft.Win32.OpenFileDialog dialog = new Microsoft.Win32.OpenFileDialog();
...
if ((bool)dialog.ShowDialog()){
   ...
}
dialogPositioningWindow.Close();

有一个关于msdn方法的老例子。

http://msdn.microsoft.com/en-us/library/ms996463.aspx

它包括实现您自己的OpenFileDialog类所需的所有代码,这些类允许扩展。

非常感谢鲍伯对此事的答复。还有一些“gotchas”。调用OpenFileDialog1.ShowDialog(positionForm)时必须传递positionForm的句柄,否则Bobb的技术在所有情况下都不可靠。此外,现在W8.1启动了一个新的fileopen控件,其中包含SkyDrive,现在W8.1 fileopen控件中的documents文件夹位置已拧紧。因此,我通过设置showhelp=true将fileopen设置为使用旧的w7控件。

下面是我最终使用的vb.net代码,我对社区的贡献,以防它有所帮助。

Private Function Get_FileName() As String

    ' Gets an Input File Name from the user, works with multi-monitors

    Dim OpenFileDialog1 As New OpenFileDialog
    Dim PositionForm As New Form
    Dim MyInputFile As String

    ' The FileDialog() opens in the last Form that was created.  It's buggy!  To ensure it appears in the
    ' area of the current Form, we create a new hidden PositionForm and then delete it afterwards.

    PositionForm.StartPosition = FormStartPosition.Manual
    PositionForm.Left = Me.Left + CInt(Me.Width / 2)
    PositionForm.Top = Me.Top + CInt(Me.Height / 2)
    PositionForm.Width = 0
    PositionForm.Height = 0
    PositionForm.FormBorderStyle = Forms.FormBorderStyle.None
    PositionForm.Visible = False
    PositionForm.Show()

    ' Added the statement "ShowHelp = True" to workaround a problem on W8.1 machines with SkyDrive installed.
    ' It causes the "old" W7 control to be used that does not point to SkyDrive in error.

    OpenFileDialog1.InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments)
    OpenFileDialog1.Filter = "Excel files (*.xls*)|*.xls*|CSV Files (*.csv)|*.csv"
    OpenFileDialog1.FilterIndex = 1
    OpenFileDialog1.RestoreDirectory = True
    OpenFileDialog1.AutoUpgradeEnabled = False
    OpenFileDialog1.ShowHelp = True
    OpenFileDialog1.FileName = ""
    OpenFileDialog1.SupportMultiDottedExtensions = False
    OpenFileDialog1.Title = "Select an Excel or .csv file containing patent data or list of Publication Numbers for your project."

    If OpenFileDialog1.ShowDialog(PositionForm) <> System.Windows.Forms.DialogResult.OK Then
        Console.WriteLine("No file was selected. Please try again!")
        PositionForm.Close()
        PositionForm.Dispose()
        OpenFileDialog1.Dispose()
        Return ""
    End If
    PositionForm.Close()
    PositionForm.Dispose()

    MyInputFile = OpenFileDialog1.FileName
    OpenFileDialog1.Dispose()
    Return MyInputFile

End Function

我是这样做的:

要显示OpenFileDialog的点:

Thread posThread = new Thread(positionOpenDialog);
posThread.Start();

DialogResult dr = ofd.ShowDialog();

重新定位代码:

[DllImport("user32.dll", EntryPoint = "FindWindow", SetLastError = true)]
static extern IntPtr FindWindowByCaption(IntPtr ZeroOnly, string lpWindowName);

[DllImport("user32.dll", EntryPoint = "SetWindowPos")]
public static extern IntPtr SetWindowPos(IntPtr hWnd, int hWndInsertAfter, int x, int Y, int cx, int cy, int wFlags);


/// <summary>
/// Find the OpenFileDialog window when it appears, and position it so
/// that we can see both dialogs at once.  There is no easier way to
/// do this (&^%$! Microsoft!).
/// </summary>
private void positionOpenDialog ()
{
    int count = 0;
    IntPtr zero = (IntPtr)0;
    const int SWP_NOSIZE = 0x0001;
    IntPtr wind;

    while ((wind = FindWindowByCaption(zero, "Open")) == (IntPtr)0)
        if (++count > 100)
            return;             // Find window failed.
        else
            Thread.Sleep(5);

    SetWindowPos(wind, 0, Right, Top, 0, 0, SWP_NOSIZE);
}

我启动一个线程来查找一个标题为“open”的窗口。(通常在3次迭代或15毫秒内找到)然后我用获得的句柄设置它的位置。(有关位置/尺寸参数,请参阅setwindowpos文档。)

笨拙的