我正在使用代码获取系统打印机图标(只有我找到的方式 - 使用IShellFolder),现在我想将它们与InstalledPrinters连接,但问题是 - 我找不到找到真实打印机名称的方法(例如作为“\ ServerName \ PrinterName”),与显示“设备和打印机”shell文件夹的内容名称不同,只能与PrinterSettings一起使用。
我用于在“设备和打印机”shell文件夹中检索打印机图标和打印机标题的代码:
Shell32.IShellFolder iDesktopFolder = Shell32.GetDesktopFolder();
try
{
IntPtr pidlPrintersFolder;
if (Shell32.SHGetFolderLocation(_hwndOwner, (int)Shell32.CSIDL.CSIDL_PRINTERS, IntPtr.Zero, 0, out pidlPrintersFolder) == 0)
try
{
StringBuilder strDisplay = new StringBuilder(260);
Guid guidIShellFolder = Shell32.IID_IShellFolder;
IntPtr ptrPrintersShellFolder;
iDesktopFolder.BindToObject(pidlPrintersFolder, IntPtr.Zero, ref guidIShellFolder, out ptrPrintersShellFolder);
Object objPrintersShellFolder = Marshal.GetTypedObjectForIUnknown(ptrPrintersShellFolder, Shell32.ShellFolderType);
try
{
Shell32.IShellFolder printersShellFolder = (Shell32.IShellFolder)objPrintersShellFolder;
IntPtr ptrObjectsList;
printersShellFolder.EnumObjects(_hwndOwner, Shell32.ESHCONTF.SHCONTF_NONFOLDERS, out ptrObjectsList);
Object objEnumIDList = Marshal.GetTypedObjectForIUnknown(ptrObjectsList, Shell32.EnumIDListType);
try
{
Shell32.IEnumIDList iEnumIDList = (Shell32.IEnumIDList)objEnumIDList;
IntPtr[] rgelt = new IntPtr[1];
IntPtr pidlPrinter;
int pceltFetched;
Shell32.STRRET ptrString;
while (iEnumIDList.Next(1, rgelt, out pceltFetched) == 0 && pceltFetched == 1)
{
printersShellFolder.GetDisplayNameOf(rgelt[0],
Shell32.ESHGDN.SHGDN_NORMAL, out ptrString);
if (Shell32.StrRetToBuf(ref ptrString, rgelt[0], strDisplay,
(uint)strDisplay.Capacity) == 0)
{
pidlPrinter = Shell32.ILCombine(pidlPrintersFolder, rgelt[0]);
string printerDisplayName = strDisplay.ToString();
Shell32.SHFILEINFO shinfo = new Shell32.SHFILEINFO();
Shell32.SHGetFileInfo(this._pidl, 0, out shinfo, (uint)Marshal.SizeOf(shinfo), Shell32.SHGFI.PIDL | Shell32.SHGFI.AddOverlays | Shell32.SHGFI.Icon);
Icon printerIcon = (Icon)Icon.FromHandle(shinfo.hIcon).Clone();
Shell32.DestroyIcon(shinfo.hIcon);
// HOW TO GET PRINTER NAME (\\ServerName\printername) WITH IS DIFFERENT FROM A PRINTER NAME IN "DEVICES AND PRINTERS" SYSTEM FOLDER
}
}
}
finally
{
Marshal.ReleaseComObject(objEnumIDList);
}
}
finally
{
Marshal.ReleaseComObject(objPrintersShellFolder);
}
}
finally
{
Shell32.ILFree(pidlPrintersFolder);
}
}
finally
{
Marshal.ReleaseComObject(iDesktopFolder);
}
感谢您的帮助。
答案 0 :(得分:1)
自己找答案。
要枚举的IShellFolder打印机就必须用IShellFolder.ParseDisplayName方法,不EnumObjects,和从PrinterSettings.IntalledPrinters(诸如“\服务器名\ PrinterName的”网络打印机)发送打印机名称以IShellFolder.ParseDisplayName PARAM pszDisplayName,的IShellFolder“设备和打印机“很好地合作。
因此,在此之后我们可以枚举真实的打印机名称(“\ ServerName \ PrinterName”),打印机显示名称(“ServerName上的PrinterName”作为“设备和打印机”中列出的打印机)和打印机图标。
我会在一些编辑后在这里发布完整代码供父亲搜索。
答案 1 :(得分:1)
在循环中,您可以在当前printersShellFolder.GetUIObjectOf
上使用IID_IDataObject
rgelt[0]
,并使用IDataObject::GetData
作为剪贴板格式调用"PrinterFriendlyName"
以获取真实的打印机名称(以STGMEDIUM
)编码。
您可以在当前pidl上使用printersShellFolder.GetUIObjectOf
IID_IQueryInfo
来获取打印机状态。