在VS . net中，当你为项目选择文件夹时，会显示一个类似于OpenFileDialog或SaveFileDialog的对话框，但设置为只接受文件夹。自从我看到这个，我就想知道它是怎么做到的。我知道FolderBrowserDialog，但我从来都不喜欢那个对话框。它开始太小，不让我利用能够键入路径的优势。
到目前为止，我几乎可以肯定在。net中没有办法做到这一点，但我很好奇在非托管代码中如何做到这一点。如果不从头开始完全重新实现对话框，如何修改对话框以使其具有这种行为呢?
我还想重申，我知道FolderBrowserDialog，但有时我不喜欢使用它，除了真正好奇如何以这种方式配置对话框。告诉我只使用FolderBrowserDialog可以帮助我保持一致的UI体验，但不能满足我的好奇心，所以它不能算作答案。
It's not a Vista-specific thing either; I've been seeing this dialog since VS .NET 2003, so it is doable in Win2k and WinXP. This is less of a "I want to know the proper way to do this" question and more of a "I have been curious about this since I first wanted to do it in VS 2003" question. I understand that Vista's file dialog has an option to do this, but it's been working in XP so I know they did something to get it to work. Vista-specific answers are not answers, because Vista doesn't exist in the question context.
更新:我接受Scott Wisniewski的答案，因为它附带了一个工作示例，但我认为Serge值得赞扬，因为他指出了对话框定制(这在。net中确实很讨厌，但它确实有效)，Mark Ransom指出微软可能为这个任务推出了一个自定义对话框。
试试下面这个来自Codeproject(归功于Nitron):
我认为这是相同的对话框，如果你添加一个截图可能会有所帮助?
bool GetFolder(std::string& folderpath, const char* szCaption=NULL, HWND hOwner=NULL)
{
bool retVal = false;
// The BROWSEINFO struct tells the shell how it should display the dialog.
BROWSEINFO bi;
memset(&bi, 0, sizeof(bi));
bi.ulFlags = BIF_USENEWUI;
bi.hwndOwner = hOwner;
bi.lpszTitle = szCaption;
// must call this if using BIF_USENEWUI
::OleInitialize(NULL);
// Show the dialog and get the itemIDList for the selected folder.
LPITEMIDLIST pIDL = ::SHBrowseForFolder(&bi);
if(pIDL != NULL)
{
// Create a buffer to store the path, then get the path.
char buffer[_MAX_PATH] = {'\0'};
if(::SHGetPathFromIDList(pIDL, buffer) != 0)
{
// Set the string value.
folderpath = buffer;
retVal = true;
}
// free the item id list
CoTaskMemFree(pIDL);
}
::OleUninitialize();
return retVal;
}
精确的音频复制工作方式在Windows XP。标准文件打开对话框显示，但文件名字段包含文本“filename将被忽略”。
这里只是猜测，但我怀疑每当对对话框进行重大更改时，字符串都会注入到组合框编辑控件中。只要该字段不为空，并且对话框标志设置为不检查文件的存在，对话框就可以正常关闭。
编辑:这比我想象的要简单得多。下面是c++ /MFC中的代码，您可以将其转换到您选择的环境中。
CFileDialog dlg(true, NULL, "Filename will be ignored", OFN_HIDEREADONLY | OFN_NOVALIDATE | OFN_PATHMUSTEXIST | OFN_READONLY, NULL, this);
dlg.DoModal();
编辑2:这应该是翻译到c#，但我不是很流利的c#，所以如果它不工作，不要对我开枪。
OpenFileDialog openFileDialog1 = new OpenFileDialog();
openFileDialog1.FileName = "Filename will be ignored";
openFileDialog1.CheckPathExists = true;
openFileDialog1.ShowReadOnly = false;
openFileDialog1.ReadOnlyChecked = true;
openFileDialog1.CheckFileExists = false;
openFileDialog1.ValidateNames = false;
if(openFileDialog1.ShowDialog() == DialogResult.OK)
{
// openFileDialog1.FileName should contain the folder and a dummy filename
}
Edit 3: Finally looked at the actual dialog in question, in Visual Studio 2005 (I didn't have access to it earlier). It is not the standard file open dialog! If you inspect the windows in Spy++ and compare them to a standard file open, you'll see that the structure and class names don't match. When you look closely, you can also spot some differences between the contents of the dialogs. My conclusion is that Microsoft completely replaced the standard dialog in Visual Studio to give it this capability. My solution or something similar will be as close as you can get, unless you're willing to code your own from scratch.
