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70 lines
3.1 KiB
C#
70 lines
3.1 KiB
C#
using CodeStatistics.Data;
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using System;
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using System.Diagnostics;
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using System.Reflection;
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using System.Windows.Forms;
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namespace CodeStatistics.Input.Helpers{
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static class MultiFolderDialog{
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private const string FilterFolders = "|\n";
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public static string[] Show(Form parent){
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if (Environment.OSVersion.Version.Major >= 6){ // vista and newer
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try{
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OpenFileDialog dialog = new OpenFileDialog{
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Filter = Lang.Get["DialogFilterFolders"]+FilterFolders,
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CheckFileExists = false,
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CheckPathExists = true,
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DereferenceLinks = true,
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AddExtension = false,
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Multiselect = true,
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AutoUpgradeEnabled = true
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};
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Assembly assembly = LoadAssembly("System.Windows.Forms");
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Type ifdType = assembly.GetType("System.Windows.Forms.FileDialogNative").GetNestedType("IFileDialog", BindingFlags.NonPublic);
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Type fdType = typeof(FileDialog);
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Type dialogType = dialog.GetType();
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const BindingFlags flags = BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic;
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var vistaDialog = dialogType.GetMethod("CreateVistaDialog", flags).Invoke(dialog, new object[0]);
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dialogType.GetMethod("OnBeforeVistaDialog", flags).Invoke(dialog, new object[]{ vistaDialog });
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uint opts = (uint)fdType.GetMethod("GetOptions", flags).Invoke(dialog, new object[0]);
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ifdType.GetMethod("SetOptions", flags).Invoke(vistaDialog, new object[]{ opts | 32u }); // 32u = FOS_PICKFOLDERS
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object events = fdType.GetNestedType("VistaDialogEvents", flags).GetConstructors()[0].Invoke(new object[]{ dialog });
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object[] parameters = { events, (uint)0 };
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ifdType.GetMethod("Advise").Invoke(vistaDialog, parameters);
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uint id = (uint)parameters[1];
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try{
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ifdType.GetMethod("Show").Invoke(vistaDialog, new object[]{ parent.Handle });
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}finally{
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ifdType.GetMethod("Unadvise").Invoke(vistaDialog, new object[]{ id });
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GC.KeepAlive(events);
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}
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return dialog.FileNames;
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}catch(Exception e){
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Debug.Write(e.ToString());
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}
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}
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var oldDialog = new FolderBrowserDialog{ ShowNewFolderButton = false };
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return oldDialog.ShowDialog(parent) == DialogResult.OK ? new string[]{ oldDialog.SelectedPath } : new string[0];
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}
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private static Assembly LoadAssembly(string name){
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foreach(AssemblyName ass in Assembly.GetExecutingAssembly().GetReferencedAssemblies()){
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if (ass.Name.Equals(name)){
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return Assembly.Load(ass);
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}
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}
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return null;
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}
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}
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}
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