vb.net 真正自定义的 OpenFileDialog .NET
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Really Custom OpenFileDialog .NET
提问by Trontor
I want to have an custom OpenFileDialog form within my project where I can add/remove buttons and customize whatever I want like a normal form. This is mainly so that it fits into the theme I am using, additionally, I can add custom buttons. Is there any tutorials on how I could construct my own? Are there any pre-existing projects I can use straight out of the download?
我想在我的项目中有一个自定义的 OpenFileDialog 表单，我可以在其中添加/删除按钮并像普通表单一样自定义我想要的任何内容。这主要是为了它适合我正在使用的主题，此外，我可以添加自定义按钮。有没有关于我如何构建自己的教程？是否有任何预先存在的项目可以直接从下载中使用？
回答by Daniel Abou Chleih
I hope that will fit your requirements:
我希望这将符合您的要求：
You will need one TreeViewand an ImageList
Code
代码
You will need System.Runtime.InteropServices;
你会需要 System.Runtime.InteropServices;
And following code to get the associated icon from the path:
以及从路径中获取关联图标的以下代码：
[StructLayout(LayoutKind.Sequential)]
public struct SHFILEINFO
{
public IntPtr hIcon;
public IntPtr iIcon;
public uint dwAttributes;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 260)]
public string szDisplayName;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 80)]
public string szTypeName;
};
class Win32
{
public const uint SHGFI_ICON = 0x100;
public const uint SHGFI_LARGEICON = 0x0; // 'Large icon
public const uint SHGFI_SMALLICON = 0x1; // 'Small icon
[DllImport("shell32.dll")]
public static extern IntPtr SHGetFileInfo(string pszPath,
uint dwFileAttributes,
ref SHFILEINFO psfi,
uint cbSizeFileInfo,
uint uFlags);
}
private int GetIconOfFile_Folder(string Path)
{
IntPtr hImgSmall; //the handle to the system image list
IntPtr hImgLarge; //the handle to the system image list
string fName; // 'the file name to get icon from
SHFILEINFO shinfo = new SHFILEINFO();
//Use this to get the small Icon
hImgSmall = Win32.SHGetFileInfo(Path, 0, ref shinfo,
(uint)Marshal.SizeOf(shinfo),
Win32.SHGFI_ICON |
Win32.SHGFI_SMALLICON);
//Use this to get the large Icon
//hImgLarge = SHGetFileInfo(fName, 0,
//ref shinfo, (uint)Marshal.SizeOf(shinfo),
//Win32.SHGFI_ICON | Win32.SHGFI_LARGEICON);
//The icon is returned in the hIcon member of the shinfo
//struct
System.Drawing.Icon myIcon =
System.Drawing.Icon.FromHandle(shinfo.hIcon);
imageList1.Images.Add(myIcon);
return imageList1.Images.Count - 1;
}
Use following Method to Get all your Drives (best place it in your constructor/Form_Load):
使用以下方法获取所有驱动器（最好将其放在构造函数/Form_Load 中）：
private void GetAllDrives()
{
DriveInfo[] drives = DriveInfo.GetDrives();
foreach (var drive in drives)
{
TreeNode rootTreeNode = new TreeNode();
rootTreeNode.Text = drive.Name;
rootTreeNode.Tag = drive.Name;
rootTreeNode.ImageIndex = GetIconOfFile_Folder(drive.Name);
rootTreeNode.SelectedImageIndex = rootTreeNode.ImageIndex;
rootTreeNode.Nodes.Add(" "); //Placeholder to enable expanding (+)
treeView1.Nodes.Add(rootTreeNode);
}
}
Then you will need an EventHandler for the Expand-Event, which will call the method GetFilesAndFolder()
然后，您将需要一个用于展开事件的 EventHandler，它将调用该方法 GetFilesAndFolder()
private void treeView1_BeforeExpand(object sender, TreeViewCancelEventArgs e)
{
e.Node.Nodes.Clear();
GetFilesAndFolder(e.Node, (string)e.Node.Tag);
}
private void GetFilesAndFolder(TreeNode tn, string Path)
{
try
{
string[] Directories = Directory.GetDirectories(Path);
string[] Files = Directory.GetFiles(Path);
foreach (string dir in Directories)
{
TreeNode dirTreeNode = new TreeNode();
dirTreeNode.Tag = dir;
dirTreeNode.Text = new DirectoryInfo(dir).Name;
dirTreeNode.ImageIndex = GetIconOfFile_Folder(dir);
dirTreeNode.SelectedImageIndex = dirTreeNode.ImageIndex;
dirTreeNode.Nodes.Add(" ");
tn.Nodes.Add(dirTreeNode);
}
foreach (string file in Files)
{
TreeNode fileTreeNode = new TreeNode();
fileTreeNode.Tag = file;
fileTreeNode.Text = new FileInfo(file).Name;
fileTreeNode.ImageIndex = GetIconOfFile_Folder(file);
fileTreeNode.SelectedImageIndex = fileTreeNode.ImageIndex;
tn.Nodes.Add(fileTreeNode);
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, ex.Source, MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
}
}
Finally I have created an EventHandler for the NodeDoubleClick-Event in the TreeView:
最后，我为 TreeView 中的 NodeDoubleClick-Event 创建了一个 EventHandler：
private void treeView1_NodeMouseDoubleClick(object sender, TreeNodeMouseClickEventArgs e)
{
if (CheckIfPathIsFile(e.Node.Tag.ToString()) == true) //If the Tag (Path) is a File
{
//Do something with the Path (close this Form + return Path)
}
}
private bool CheckIfPathIsFile(string Path)
{
// get the file attributes for file or directory
FileAttributes attr = File.GetAttributes(Path);
//detect whether its a directory or file
if ((attr & FileAttributes.Directory) == FileAttributes.Directory)
return false;
else
return true;
}
回答by Thilina H
If you used WinForms, chances are that at some point you wanted to extend the OpenFileDialog or SaveFileDialog, but you gave up because there is no easy way to do it,Go with following link to get undestand how to custermize with your own... HERE
如果您使用过 WinForms，很可能在某些时候您想扩展 OpenFileDialog 或 SaveFileDialog，但您放弃了，因为没有简单的方法可以做到这一点，请访问以下链接以了解如何使用您自己的... 这里
