FolderBrowserDialog クラス
メモ : この名前空間、クラス、およびメンバは、.NET Framework Version 1.1 だけでサポートされています。
ユーザーがフォルダを選択するために使用するコモン ダイアログ ボックスを表します。このクラスは継承できません。
この型のすべてのメンバの一覧については、FolderBrowserDialog メンバ を参照してください。
System.Object
System.MarshalByRefObject
System.ComponentModel.Component
System.Windows.Forms.CommonDialog
System.Windows.Forms.FolderBrowserDialog
NotInheritable Public Class FolderBrowserDialog
Inherits CommonDialog
[C#]
public sealed class FolderBrowserDialog : CommonDialog
[C++]
public __gc __sealed class FolderBrowserDialog : public
CommonDialog
[JScript]
public class FolderBrowserDialog extends CommonDialog
スレッドセーフ
この型の public static (Visual Basicでは Shared) のすべてのメンバは、マルチスレッド操作で安全に使用できます。インスタンスのメンバの場合は、スレッドセーフであるとは限りません。
解説
このクラスは、ユーザーがフォルダを参照、作成、選択できる方法を提供します。このクラスは、ファイルではなく、フォルダの選択だけをユーザーに許可する場合に使用します。フォルダの参照はツリー コントロールを通じて行います。ファイル システムにあるフォルダだけ選択できます。仮想フォルダは選択できません。
通常、新しい FolderBrowserDialog を作成したら、参照の開始位置とするディレクトリを RootFolder に設定します。または、 RootFolder のサブフォルダへの絶対パスを SelectedPath に設定することによって、最初に選択されるパスを指定することもできます。 Description プロパティを使用すると、追加の指示情報をユーザーに提示することもできます。最後に、 ShowDialog メソッドを呼び出すと、ダイアログ ボックスが表示されます。ダイアログ ボックスが閉じられ、 ShowDialog の結果が DialogResult.OK の場合、選択されたフォルダへのパスを表す文字列が SelectedPath に格納されます。
ShowNewFolderButton プロパティを使用すると、 New Folder ボタンによるフォルダの新規作成をユーザーに許可するかどうかを制御できます。
FolderBrowserDialog はモーダル ダイアログ ボックスです。このため、このダイアログ ボックスが表示されているときは、ユーザーがフォルダを選択するまでアプリケーションの他の機能は動作しません。ダイアログ ボックスがモーダルとして表示されている場合、キーボードやマウス クリックによる入力は、ダイアログ ボックスのオブジェクトに対してしか発生しません。呼び出しプログラムに対する入力が発生する前に、プログラムが (通常、何らかのユーザーの操作に対する応答として) ダイアログ ボックスを非表示にするか、または終了する必要があります。
使用例
' The following example displays an application that provides the ability to
' open rich text files (rtf) into the RichTextBox. The example demonstrates
' using the FolderBrowserDialog to set the default directory for opening files.
' The OpenFileDialog class is used to open the file.
Imports System
Imports System.Drawing
Imports System.Windows.Forms
Imports System.IO
Public Class FolderBrowserDialogExampleForm
Inherits Form
Private folderBrowserDialog1 As FolderBrowserDialog
Private openFileDialog1 As OpenFileDialog
Private richTextBox1 As RichTextBox
Private mainMenu1 As MainMenu
Private fileMenuItem As MenuItem
Private WithEvents folderMenuItem As MenuItem, _
closeMenuItem As MenuItem, _
openMenuItem As MenuItem
Private openFileName As String, folderName As String
Private fileOpened As Boolean = False
Public Sub New()
Me.mainMenu1 = New System.Windows.Forms.MainMenu()
Me.fileMenuItem = New System.Windows.Forms.MenuItem()
Me.openMenuItem = New System.Windows.Forms.MenuItem()
Me.folderMenuItem = New System.Windows.Forms.MenuItem()
Me.closeMenuItem = New System.Windows.Forms.MenuItem()
Me.openFileDialog1 = New System.Windows.Forms.OpenFileDialog()
Me.folderBrowserDialog1 = New System.Windows.Forms.FolderBrowserDialog()
Me.richTextBox1 = New System.Windows.Forms.RichTextBox()
Me.mainMenu1.MenuItems.Add(Me.fileMenuItem)
Me.fileMenuItem.MenuItems.AddRange( _
New System.Windows.Forms.MenuItem() {Me.openMenuItem, _
Me.closeMenuItem, _
Me.folderMenuItem})
Me.fileMenuItem.Text = "File"
Me.openMenuItem.Text = "Open..."
Me.folderMenuItem.Text = "Select Directory..."
Me.closeMenuItem.Text = "Close"
Me.closeMenuItem.Enabled = False
Me.openFileDialog1.DefaultExt = "rtf"
Me.openFileDialog1.Filter = "rtf files (*.rtf)|*.rtf"
' Set the Help text description for the FolderBrowserDialog.
Me.folderBrowserDialog1.Description = _
"Select the directory that you want to use As the default."
' Do not allow the user to create New files via the FolderBrowserDialog.
Me.folderBrowserDialog1.ShowNewFolderButton = False
' Default to the My Documents folder.
Me.folderBrowserDialog1.RootFolder = Environment.SpecialFolder.Personal
Me.richTextBox1.AcceptsTab = True
Me.richTextBox1.Location = New System.Drawing.Point(8, 8)
Me.richTextBox1.Size = New System.Drawing.Size(280, 344)
Me.richTextBox1.Anchor = AnchorStyles.Top Or AnchorStyles.Left Or _
AnchorStyles.Bottom Or AnchorStyles.Right
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(296, 360)
Me.Controls.Add(Me.richTextBox1)
Me.Menu = Me.mainMenu1
Me.Text = "RTF Document Browser"
End Sub
<STAThread()> _
Shared Sub Main()
Application.Run(New FolderBrowserDialogExampleForm())
End Sub
' Bring up a dialog to open a file.
Private Sub openMenuItem_Click(sender As object, e As System.EventArgs) _
Handles openMenuItem.Click
' If a file is not opened, then set the initial directory to the
' FolderBrowserDialog.SelectedPath value.
If (not fileOpened) Then
openFileDialog1.InitialDirectory = folderBrowserDialog1.SelectedPath
openFileDialog1.FileName = nothing
End If
' Display the openFile dialog.
Dim result As DialogResult = openFileDialog1.ShowDialog()
' OK button was pressed.
If (result = DialogResult.OK) Then
openFileName = openFileDialog1.FileName
Try
' Output the requested file in richTextBox1.
Dim s As Stream = openFileDialog1.OpenFile()
richTextBox1.LoadFile(s, RichTextBoxStreamType.RichText)
s.Close()
fileOpened = True
Catch exp As Exception
MessageBox.Show("An error occurred while attempting to load the file. The error is:" _
+ System.Environment.NewLine + exp.ToString() + System.Environment.NewLine)
fileOpened = False
End Try
Invalidate()
closeMenuItem.Enabled = fileOpened
' Cancel button was pressed.
ElseIf (result = DialogResult.Cancel) Then
return
End If
End Sub
' Close the current file.
Private Sub closeMenuItem_Click(sender As object, e As System.EventArgs) _
Handles closeMenuItem.Click
richTextBox1.Text = ""
fileOpened = False
closeMenuItem.Enabled = False
End Sub
' Bring up a dialog to chose a folder path in which to open or save a file.
Private Sub folderMenuItem_Click(sender As object, e As System.EventArgs) _
Handles folderMenuItem.Click
' Show the FolderBrowserDialog.
Dim result As DialogResult = folderBrowserDialog1.ShowDialog()
If ( result = DialogResult.OK ) Then
folderName = folderBrowserDialog1.SelectedPath
If (not fileOpened) Then
' No file is opened, bring up openFileDialog in selected path.
openFileDialog1.InitialDirectory = folderName
openFileDialog1.FileName = nothing
openMenuItem.PerformClick()
End If
End If
End Sub
End Class
[C#]
// The following example displays an application that provides the ability to
// open rich text files (rtf) into the RichTextBox. The example demonstrates
// using the FolderBrowserDialog to set the default directory for opening files.
// The OpenFileDialog class is used to open the file.
using System;
using System.Drawing;
using System.Windows.Forms;
using System.IO;
public class FolderBrowserDialogExampleForm : System.Windows.Forms.Form
{
private FolderBrowserDialog folderBrowserDialog1;
private OpenFileDialog openFileDialog1;
private RichTextBox richTextBox1;
private MainMenu mainMenu1;
private MenuItem fileMenuItem, openMenuItem;
private MenuItem folderMenuItem, closeMenuItem;
private string openFileName, folderName;
private bool fileOpened = false;
// The main entry point for the application.
static void Main()
{
Application.Run(new FolderBrowserDialogExampleForm());
}
// Constructor.
public FolderBrowserDialogExampleForm()
{
this.mainMenu1 = new System.Windows.Forms.MainMenu();
this.fileMenuItem = new System.Windows.Forms.MenuItem();
this.openMenuItem = new System.Windows.Forms.MenuItem();
this.folderMenuItem = new System.Windows.Forms.MenuItem();
this.closeMenuItem = new System.Windows.Forms.MenuItem();
this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog();
this.folderBrowserDialog1 = new System.Windows.Forms.FolderBrowserDialog();
this.richTextBox1 = new System.Windows.Forms.RichTextBox();
this.mainMenu1.MenuItems.Add(this.fileMenuItem);
this.fileMenuItem.MenuItems.AddRange(
new System.Windows.Forms.MenuItem[] {this.openMenuItem,
this.closeMenuItem,
this.folderMenuItem});
this.fileMenuItem.Text = "File";
this.openMenuItem.Text = "Open...";
this.openMenuItem.Click += new System.EventHandler(this.openMenuItem_Click);
this.folderMenuItem.Text = "Select Directory...";
this.folderMenuItem.Click += new System.EventHandler(this.folderMenuItem_Click);
this.closeMenuItem.Text = "Close";
this.closeMenuItem.Click += new System.EventHandler(this.closeMenuItem_Click);
this.closeMenuItem.Enabled = false;
this.openFileDialog1.DefaultExt = "rtf";
this.openFileDialog1.Filter = "rtf files (*.rtf)|*.rtf";
// Set the help text description for the FolderBrowserDialog.
this.folderBrowserDialog1.Description =
"Select the directory that you want to use as the default.";
// Do not allow the user to create new files via the FolderBrowserDialog.
this.folderBrowserDialog1.ShowNewFolderButton = false;
// Default to the My Documents folder.
this.folderBrowserDialog1.RootFolder = Environment.SpecialFolder.Personal;
this.richTextBox1.AcceptsTab = true;
this.richTextBox1.Location = new System.Drawing.Point(8, 8);
this.richTextBox1.Size = new System.Drawing.Size(280, 344);
this.richTextBox1.Anchor = AnchorStyles.Top | AnchorStyles.Left |
AnchorStyles.Bottom | AnchorStyles.Right;
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(296, 360);
this.Controls.Add(this.richTextBox1);
this.Menu = this.mainMenu1;
this.Text = "RTF Document Browser";
}
// Bring up a dialog to open a file.
private void openMenuItem_Click(object sender, System.EventArgs e)
{
// If a file is not opened, then set the initial directory to the
// FolderBrowserDialog.SelectedPath value.
if (!fileOpened) {
openFileDialog1.InitialDirectory = folderBrowserDialog1.SelectedPath;
openFileDialog1.FileName = null;
}
// Display the openFile dialog.
DialogResult result = openFileDialog1.ShowDialog();
// OK button was pressed.
if(result == DialogResult.OK)
{
openFileName = openFileDialog1.FileName;
try
{
// Output the requested file in richTextBox1.
Stream s = openFileDialog1.OpenFile();
richTextBox1.LoadFile(s, RichTextBoxStreamType.RichText);
s.Close();
fileOpened = true;
}
catch(Exception exp)
{
MessageBox.Show("An error occurred while attempting to load the file. The error is:"
+ System.Environment.NewLine + exp.ToString() + System.Environment.NewLine);
fileOpened = false;
}
Invalidate();
closeMenuItem.Enabled = fileOpened;
}
// Cancel button was pressed.
else if(result == DialogResult.Cancel)
{
return;
}
}
// Close the current file.
private void closeMenuItem_Click(object sender, System.EventArgs e)
{
richTextBox1.Text = "";
fileOpened = false;
closeMenuItem.Enabled = false;
}
// Bring up a dialog to chose a folder path in which to open or save a file.
private void folderMenuItem_Click(object sender, System.EventArgs e)
{
// Show the FolderBrowserDialog.
DialogResult result = folderBrowserDialog1.ShowDialog();
if( result == DialogResult.OK )
{
folderName = folderBrowserDialog1.SelectedPath;
if(!fileOpened)
{
// No file is opened, bring up openFileDialog in selected path.
openFileDialog1.InitialDirectory = folderName;
openFileDialog1.FileName = null;
openMenuItem.PerformClick();
}
}
}
}
[C++]
// The following example displays an application that provides the ability to
// open rich text files (rtf) into the RichTextBox. The example demonstrates
// using the FolderBrowserDialog to set the default directory for opening files.
// The OpenFileDialog is used to open the file.
#using <mscorlib.dll>
#using <System.dll>
#using <System.Windows.Forms.dll>
#using <System.Drawing.dll>
using namespace System;
using namespace System::Drawing;
using namespace System::Windows::Forms;
using namespace System::IO;
public __gc class FolderBrowserDialogExampleForm : public System::Windows::Forms::Form {
private:
FolderBrowserDialog* folderBrowserDialog1;
OpenFileDialog* openFileDialog1;
RichTextBox* richTextBox1;
MainMenu* mainMenu1;
MenuItem* fileMenuItem;
MenuItem* openMenuItem;
MenuItem* folderMenuItem;
MenuItem* closeMenuItem;
String* openFileName;
String* folderName;
bool fileOpened;
public:
// Constructor.
FolderBrowserDialogExampleForm() {
fileOpened = false;
this->mainMenu1 = new System::Windows::Forms::MainMenu();
this->fileMenuItem = new System::Windows::Forms::MenuItem();
this->openMenuItem = new System::Windows::Forms::MenuItem();
this->folderMenuItem = new System::Windows::Forms::MenuItem();
this->closeMenuItem = new System::Windows::Forms::MenuItem();
this->openFileDialog1 = new System::Windows::Forms::OpenFileDialog();
this->folderBrowserDialog1 = new System::Windows::Forms::FolderBrowserDialog();
this->richTextBox1 = new System::Windows::Forms::RichTextBox();
this->mainMenu1->MenuItems->Add(this->fileMenuItem);
System::Windows::Forms::MenuItem* temp0 [] = {this->openMenuItem,
this->closeMenuItem,
this->folderMenuItem};
this->fileMenuItem->MenuItems->AddRange(temp0);
this->fileMenuItem->Text = S"File";
this->openMenuItem->Text = S"Open...";
this->openMenuItem->Click += new System::EventHandler(this, &FolderBrowserDialogExampleForm::openMenuItem_Click);
this->folderMenuItem->Text = S"Select Directory...";
this->folderMenuItem->Click += new System::EventHandler(this, &FolderBrowserDialogExampleForm::folderMenuItem_Click);
this->closeMenuItem->Text = S"Close";
this->closeMenuItem->Click += new System::EventHandler(this, &FolderBrowserDialogExampleForm::closeMenuItem_Click);
this->closeMenuItem->Enabled = false;
this->openFileDialog1->DefaultExt = S"rtf";
this->openFileDialog1->Filter = S"rtf files (*.rtf)|*.rtf";
// Set the help text description for the FolderBrowserDialog.
this->folderBrowserDialog1->Description = S"Select the directory that you want to use as the default.";
// Do not allow the user to create new files via the FolderBrowserDialog.
this->folderBrowserDialog1->ShowNewFolderButton = false;
// Default to the My Documents folder.
this->folderBrowserDialog1->RootFolder = Environment::SpecialFolder::Personal;
this->richTextBox1->AcceptsTab = true;
this->richTextBox1->Location = System::Drawing::Point(8, 8);
this->richTextBox1->Size = System::Drawing::Size(280, 344);
this->richTextBox1->Anchor = static_cast<AnchorStyles>(AnchorStyles::Top | AnchorStyles::Left |
AnchorStyles::Bottom | AnchorStyles::Right);
this->AutoScaleBaseSize = System::Drawing::Size(5, 13);
this->ClientSize = System::Drawing::Size(296, 360);
this->Controls->Add(this->richTextBox1);
this->Menu = this->mainMenu1;
this->Text = S"RTF Document Browser";
}
private:
// Bring up a dialog to open a file.
void openMenuItem_Click(Object* /*sender*/, System::EventArgs* /*e*/) {
// If a file is not opened then set the initial directory to the
// FolderBrowserDialog::SelectedPath value.
if (!fileOpened) {
openFileDialog1->InitialDirectory = folderBrowserDialog1->SelectedPath;
openFileDialog1->FileName = 0;
}
// Display the openFile Dialog.
System::Windows::Forms::DialogResult result = openFileDialog1->ShowDialog();
// OK button was pressed.
if (result == DialogResult::OK) {
openFileName = openFileDialog1->FileName;
try {
// Output the requested file in richTextBox1.
Stream* s = openFileDialog1->OpenFile();
richTextBox1->LoadFile(s, RichTextBoxStreamType::RichText);
s->Close();
fileOpened = true;
} catch (Exception* exp) {
MessageBox::Show(String::Concat(
S"An error occurred while attempting to load the file. The error is: ",
System::Environment::NewLine, exp, System::Environment::NewLine));
fileOpened = false;
}
Invalidate();
closeMenuItem->Enabled = fileOpened;
}
// Cancel button was pressed.
else if (result == DialogResult::Cancel) {
return;
}
}
// Close the current file.
void closeMenuItem_Click(Object* /*sender*/, System::EventArgs* /*e*/) {
richTextBox1->Text = S"";
fileOpened = false;
closeMenuItem->Enabled = false;
}
// Bring up a dialog to chose a folder path in which to open/save a file.
void folderMenuItem_Click(Object* /*sender*/, System::EventArgs* /*e*/) {
// Show the FolderBrowserDialog.
System::Windows::Forms::DialogResult result = folderBrowserDialog1->ShowDialog();
if (result == DialogResult::OK) {
folderName = folderBrowserDialog1->SelectedPath;
if (!fileOpened) {
// No file is opened, bring up openFileDialog in selected path.
openFileDialog1->InitialDirectory = folderName;
openFileDialog1->FileName = 0;
openMenuItem->PerformClick();
}
}
}
};
// The main entry point for the application.
int main() {
Application::Run(new FolderBrowserDialogExampleForm());
}
[JScript] JScript のサンプルはありません。Visual Basic、C#、および C++ のサンプルを表示するには、このページの左上隅にある言語のフィルタ ボタン .gif)
をクリックします。
必要条件
名前空間: System.Windows.Forms
プラットフォーム: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 ファミリ
アセンブリ: System.Windows.Forms (System.Windows.Forms.dll 内)
参照
FolderBrowserDialog メンバ | System.Windows.Forms 名前空間 | RootFolder | SelectedPath | ShowDialog