/// <summary>
/// 获得拖放列表中符合要求的拖放项
/// </summary>
/// <param name="data">拖放数据</param>
/// <param name="enableFolder">是否允许文件夹</param>
/// <param name="enableFile">是否允许文件</param>
/// <param name="fileExtensions">允许的文件类型</param>
/// <returns>返回符合要求的文件列表</returns>
public static IEnumerable <string> GetAvailableFileItem(this DataObject data, bool enableFolder, bool enableFile, HashSet <string> fileExtensions = null)
{
if (!data.ContainsFileDropList())
{
return(null);
}
return(data.GetFileDropList().Cast <string>().Where(
s =>
(enableFolder && System.IO.Directory.Exists(s))
||
(enableFile && System.IO.File.Exists(s) && (fileExtensions == null || fileExtensions.Count == 0 || fileExtensions.Contains("*") || fileExtensions.Contains(System.IO.Path.GetExtension(s).Trim('.'))))
));
}
/// <summary>
/// 判断拖放列表是否有任何一个符合要求的拖放项
/// </summary>
/// <param name="data">拖放数据</param>
/// <param name="enableFolder">是否允许文件夹</param>
/// <param name="enableFile">是否允许文件</param>
/// <param name="fileExtensions">允许的文件类型</param>
/// <returns>如果至少一个符合要求，则返回true，否则返回false</returns>
public static bool HasAvailableFileItem(this DataObject data, bool enableFolder, bool enableFile, params string[] fileExtensions)
{
if (!data.ContainsFileDropList())
{
return(false);
}
return(data.GetFileDropList().Cast <string>().Any(
s =>
(enableFolder && System.IO.Directory.Exists(s))
||
(enableFile && System.IO.File.Exists(s) && (fileExtensions.IsEmpty() || fileExtensions.Contains(System.IO.Path.GetExtension(s).Trim('.'))))
));
}
public void TestAudio ()
{
DataObject d = new DataObject ();
byte[] b = new byte[] { 1, 2, 3 };
d.SetAudio (b);
Assert.AreEqual (true, d.ContainsAudio (), "A1");
Assert.AreEqual (false, d.ContainsFileDropList (), "A2");
Assert.AreEqual (false, d.ContainsImage (), "A3");
Assert.AreEqual (false, d.ContainsText (), "A4");
Assert.AreEqual (false, d.ContainsText (TextDataFormat.CommaSeparatedValue), "A5");
Assert.AreEqual (b.Length, d.GetAudioStream ().Length, "A6");
}
public void TestText ()
{
DataObject d = new DataObject ();
d.SetText ("yo");
Assert.AreEqual (false, d.ContainsAudio (), "A1");
Assert.AreEqual (false, d.ContainsFileDropList (), "A2");
Assert.AreEqual (false, d.ContainsImage (), "A3");
Assert.AreEqual (true, d.ContainsText (), "A4");
Assert.AreEqual (false, d.ContainsText (TextDataFormat.CommaSeparatedValue), "A5");
Assert.AreEqual ("yo", d.GetText (), "A6");
Assert.AreEqual ("yo", d.GetData (DataFormats.StringFormat), "A6-1");
d.SetText ("<html></html>", TextDataFormat.Html);
Assert.AreEqual (true, d.ContainsText (), "A7");
Assert.AreEqual (false, d.ContainsText (TextDataFormat.CommaSeparatedValue), "A8");
Assert.AreEqual (true, d.ContainsText (TextDataFormat.Html), "A9");
Assert.AreEqual (false, d.ContainsText (TextDataFormat.Rtf), "A10");
Assert.AreEqual (true, d.ContainsText (TextDataFormat.Text), "A11");
Assert.AreEqual (true, d.ContainsText (TextDataFormat.UnicodeText), "A12");
// directly put a string
d.SetData ("yo");
Assert.AreEqual (true, d.ContainsText (TextDataFormat.Text), "A13");
Assert.AreEqual (true, d.ContainsText (TextDataFormat.UnicodeText), "A14");
Assert.AreEqual ("yo", d.GetData (DataFormats.StringFormat), "A15");
Assert.AreEqual ("yo", d.GetData (DataFormats.Text), "A16");
Assert.AreEqual ("yo", d.GetData (DataFormats.UnicodeText), "A17");
}
public void TestImage ()
{
DataObject d = new DataObject ();
Image i = new Bitmap (16, 16);
d.SetImage (i);
Assert.AreEqual (false, d.ContainsAudio (), "A1");
Assert.AreEqual (false, d.ContainsFileDropList (), "A2");
Assert.AreEqual (true, d.ContainsImage (), "A3");
Assert.AreEqual (false, d.ContainsText (), "A4");
Assert.AreEqual (false, d.ContainsText (TextDataFormat.CommaSeparatedValue), "A5");
Assert.AreSame (i, d.GetImage (), "A6");
}
public void TestFileDrop ()
{
DataObject d = new DataObject ();
StringCollection sc = new StringCollection ();
sc.AddRange (new string[] {"A", "B", "C"});
d.SetFileDropList (sc);
Assert.AreEqual (false, d.ContainsAudio (), "A1");
Assert.AreEqual (true, d.ContainsFileDropList (), "A2");
Assert.AreEqual (false, d.ContainsImage (), "A3");
Assert.AreEqual (false, d.ContainsText (), "A4");
Assert.AreEqual (false, d.ContainsText (TextDataFormat.CommaSeparatedValue), "A5");
Assert.AreEqual (sc.Count, d.GetFileDropList ().Count, "A6");
}
private void treeView_DragOver(object sender, DragEventArgs e)
{
DataObject o = new DataObject(e.Data);
if (o.ContainsFileDropList()) {
FileTreeNode node = (FileTreeNode)treeView.GetNodeAt(treeView.PointToClient(new Point(e.X, e.Y)));
if (node != null && node.File.Type == FileSystemObjectType.Directory) {
if ((e.AllowedEffect & DragDropEffects.Move) != 0 && (e.KeyState & 8) == 0) // Ctrl is pressed
{
e.Effect = DragDropEffects.Move;
return;
}
else if ((e.AllowedEffect & DragDropEffects.Copy) != 0) {
e.Effect = DragDropEffects.Copy;
return;
}
}
}
e.Effect = DragDropEffects.None;
}
private void treeView_DragDrop(object sender, DragEventArgs e)
{
DataObject o = new DataObject(e.Data);
if (o.ContainsFileDropList()) {
FileTreeNode node = (FileTreeNode)treeView.GetNodeAt(treeView.PointToClient(new Point(e.X, e.Y)));
if (node != null && node.File.Type == FileSystemObjectType.Directory) {
StringCollection files = o.GetFileDropList();
Paste(node, files, e.Effect == DragDropEffects.Move ? false : true);
}
}
}
public bool LoadDataObject(object Src)
{
try
{
DataObject d = new DataObject(Src);
if (d.ContainsImage())
{
if (LoadImage(d.GetImage()))
return true;
}
if (d.ContainsFileDropList())
{
foreach (string FName in d.GetFileDropList())
{
try
{
if (LoadImage(FName))
return true;
}
catch
{
}
}
}
if (d.ContainsText())
{
string FName = d.GetText().Trim();
if ((FName.IndexOf("http://") == 0) ||
(FName.IndexOf("https://") == 0))
{
if (LoadImageFromUrl(FName))
return true;
}
else
{
if (File.Exists(FName))
{
if (LoadImage(FName))
return true;
}
}
}
}
catch (Exception Ex)
{
MessageBox.Show(Ex.ToString());
}
return false;
}
public bool ContainsFileDropList()
{
return(_dao.ContainsFileDropList());
}
