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Added ShellDataObject constructor taking a list of ShellItems which adds them via CFSTR_SHELLIDLIST

pull/187/head
dahall 2020-12-03 19:28:41 -07:00
parent 1f0183dcc9
commit af7996b401
1 changed files with 23 additions and 0 deletions
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23
Windows.Shell/ShellDataObject.cs
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@ -42,6 +42,29 @@ namespace Vanara.Windows.Shell
{
}
/// <summary>Initializes a new instance of the <see cref="ShellDataObject"/> class.</summary>
/// <param name="items">A list of ShellItem instances.</param>
public ShellDataObject(ShellItem[] items) : base(ShellClipboardFormat.CFSTR_SHELLIDLIST, GetPIDLArrayStream(items))
{
}
private static Stream GetPIDLArrayStream(ShellItem[] items)
{
var str = new MemoryStream();
var pidlBytes = Array.ConvertAll(items, i => i.PIDL.GetBytes());
int offset = 0;
str.Write(BitConverter.GetBytes((uint)pidlBytes.Length), offset, sizeof(uint));
offset += sizeof(uint);
for (var i = 0; i < pidlBytes.Length; i++, offset += sizeof(uint))
str.Write(BitConverter.GetBytes((uint)pidlBytes[i].Length), offset, sizeof(uint));
for (var i = 0; i < pidlBytes.Length; i++)
{
str.Write(pidlBytes[i], offset, pidlBytes[i].Length);
offset += pidlBytes[i].Length;
}
return str;
}
/// <summary>This format identifier is used by a data object to indicate whether it is in a drag-and-drop loop.</summary>
/// <remarks>
/// Some drop targets might call IDataObject::GetData and attempt to extract data while the object is still within the drag-and-drop