SaveFileDialog.OverwritePrompt プロパティ
アセンブリ: System.Windows.Forms (system.windows.forms.dll 内)

Dim instance As SaveFileDialog Dim value As Boolean value = instance.OverwritePrompt instance.OverwritePrompt = value
/** @property */ public boolean get_OverwritePrompt () /** @property */ public void set_OverwritePrompt (boolean value)
public function get OverwritePrompt () : boolean public function set OverwritePrompt (value : boolean)
ユーザーが既に存在するファイル名を指定していて、ダイアログ ボックスで既存のファイルを上書きする前にメッセージを表示する場合は true。ダイアログ ボックスでファイル上書きを確認するメッセージを表示せずに、既存のファイルが自動的に上書きされる場合は false。既定値は true です。

RichTextBox.SaveFile メソッドと RichTextBox.LoadFile メソッドをストリームと一緒に使用するコード例を次に示します。また、この例では、FileName メンバ、DefaultExt メンバ、CreatePrompt メンバ、および OverwritePrompt メンバも使用しています。
これは完成された例であるため、プロジェクトにコピーすると実行できます。
Imports System.Windows.Forms Public Class Form1 Inherits System.Windows.Forms.Form Friend WithEvents RichTextBox1 As System.Windows.Forms.RichTextBox Friend WithEvents Button1 As System.Windows.Forms.Button Friend WithEvents RichTextBox2 As System.Windows.Forms.RichTextBox Friend WithEvents Button2 As System.Windows.Forms.Button Friend WithEvents SaveFileDialog1 As System.Windows.Forms.SaveFileDialog Public Sub New() MyBase.New() Me.RichTextBox1 = New System.Windows.Forms.RichTextBox Me.Button1 = New System.Windows.Forms.Button Me.RichTextBox2 = New System.Windows.Forms.RichTextBox Me.Button2 = New System.Windows.Forms.Button Me.SaveFileDialog1 = New System.Windows.Forms.SaveFileDialog Me.SuspendLayout() Me.RichTextBox1.Location = New System.Drawing.Point(24, 64) Me.RichTextBox1.Name = "RichTextBox1" Me.RichTextBox1.TabIndex = 0 Me.RichTextBox1.Text = "Type something here." Me.Button1.Location = New System.Drawing.Point(96, 16) Me.Button1.Name = "Button1" Me.Button1.Size = New System.Drawing.Size(96, 24) Me.Button1.TabIndex = 1 Me.Button1.Text = "Save To Stream" Me.RichTextBox2.Location = New System.Drawing.Point(152, 64) Me.RichTextBox2.Name = "RichTextBox2" Me.RichTextBox2.TabIndex = 3 Me.RichTextBox2.Text = "It will be added to the stream and appear here." Me.Button2.Location = New System.Drawing.Point(104, 200) Me.Button2.Name = "Button2" Me.Button2.Size = New System.Drawing.Size(88, 32) Me.Button2.TabIndex = 4 Me.Button2.Text = "Save Stream To File" Me.ClientSize = New System.Drawing.Size(292, 266) Me.Controls.Add(Me.Button2) Me.Controls.Add(Me.RichTextBox2) Me.Controls.Add(Me.Button1) Me.Controls.Add(Me.RichTextBox1) Me.Name = "Form1" Me.Text = "Form1" Me.ResumeLayout(False) End Sub Public Shared Sub Main() Application.Run(New Form1) End Sub ' Declare a new memory stream. Dim userInput As New System.IO.MemoryStream ' Save the content of RichTextBox1 to the memory stream, appending 'a LineFeed character. Private Sub Button1_Click(ByVal sender As System.Object, _ ByVal e As System.EventArgs) Handles Button1.Click RichTextBox1.SaveFile(userInput, RichTextBoxStreamType.PlainText) userInput.WriteByte(13) ' Display the entire contents of the stream, ' by setting its position to 0, to RichTextBox2. userInput.Position = 0 RichTextBox2.LoadFile(userInput, RichTextBoxStreamType.PlainText) End Sub ' Shows the use of a SaveFileDialog to save a MemoryStream to a file. Private Sub Button2_Click(ByVal sender As System.Object, _ ByVal e As System.EventArgs) Handles Button2.Click ' Set the properties on SaveFileDialog1 so the user is ' prompted to create the file if it doesn't exist ' or overwrite the file if it does exist. SaveFileDialog1.CreatePrompt = True SaveFileDialog1.OverwritePrompt = True ' Set the file name to myText.txt, set the type filter ' to text files, and set the initial directory to drive C. SaveFileDialog1.FileName = "myText" SaveFileDialog1.DefaultExt = "txt" SaveFileDialog1.Filter = "Text files (*.txt)|*.txt" SaveFileDialog1.InitialDirectory = "c:\" ' Call ShowDialog and check for a return value of DialogResult.OK , ' which indicates that the file was saved. Dim result As DialogResult = SaveFileDialog1.ShowDialog() Dim fileStream As System.IO.Stream If (result = DialogResult.OK) Then ' Open the file, copy the contents of memoryStream to fileStream , ' and close fileStream. Set the memoryStream.Position value to 0 to ' copy the entire stream. fileStream = SaveFileDialog1.OpenFile() userInput.Position = 0 userInput.WriteTo(fileStream) fileStream.Close() End If End Sub End Class
using System.Windows.Forms; public class Form1: System.Windows.Forms.Form { internal System.Windows.Forms.RichTextBox RichTextBox1; internal System.Windows.Forms.Button Button1; internal System.Windows.Forms.RichTextBox RichTextBox2; internal System.Windows.Forms.Button Button2; internal System.Windows.Forms.SaveFileDialog SaveFileDialog1; public Form1() : base() { this.RichTextBox1 = new System.Windows.Forms.RichTextBox(); this.Button1 = new System.Windows.Forms.Button(); this.RichTextBox2 = new System.Windows.Forms.RichTextBox(); this.Button2 = new System.Windows.Forms.Button(); this.SaveFileDialog1 = new System.Windows.Forms.SaveFileDialog(); this.SuspendLayout(); this.RichTextBox1.Location = new System.Drawing.Point(24, 64); this.RichTextBox1.Name = "RichTextBox1"; this.RichTextBox1.TabIndex = 0; this.RichTextBox1.Text = "Type something here."; this.Button1.Location = new System.Drawing.Point(96, 16); this.Button1.Name = "Button1"; this.Button1.Size = new System.Drawing.Size(96, 24); this.Button1.TabIndex = 1; this.Button1.Text = "Save To Stream"; this.Button1.Click += new System.EventHandler(Button1_Click); this.RichTextBox2.Location = new System.Drawing.Point(152, 64); this.RichTextBox2.Name = "RichTextBox2"; this.RichTextBox2.TabIndex = 3; this.RichTextBox2.Text = "It will be added to the stream " + "and appear here."; this.Button2.Location = new System.Drawing.Point(104, 200); this.Button2.Name = "Button2"; this.Button2.Size = new System.Drawing.Size(88, 32); this.Button2.TabIndex = 4; this.Button2.Text = "Save Stream To File"; this.Button2.Click += new System.EventHandler(Button2_Click); this.ClientSize = new System.Drawing.Size(292, 266); this.Controls.Add(this.Button2); this.Controls.Add(this.RichTextBox2); this.Controls.Add(this.Button1); this.Controls.Add(this.RichTextBox1); this.Name = "Form1"; this.Text = "Form1"; this.ResumeLayout(false); } public static void Main() { Application.Run(new Form1()); } // Declare a new memory stream. System.IO.MemoryStream userInput = new System.IO.MemoryStream(); // Save the content of RichTextBox1 to the memory stream, // appending a LineFeed character. private void Button1_Click(System.Object sender, System.EventArgs e) { RichTextBox1.SaveFile(userInput, RichTextBoxStreamType.PlainText); userInput.WriteByte(13); // Display the entire contents of the stream, // by setting its position to 0, to RichTextBox2. userInput.Position = 0; RichTextBox2.LoadFile(userInput, RichTextBoxStreamType.PlainText); } // Shows the use of a SaveFileDialog to save a MemoryStream to a file. private void Button2_Click(System.Object sender, System.EventArgs e) { // Set the properties on SaveFileDialog1 so the user is // prompted to create the file if it doesn't exist // or overwrite the file if it does exist. SaveFileDialog1.CreatePrompt = true; SaveFileDialog1.OverwritePrompt = true; // Set the file name to myText.txt, set the type filter // to text files, and set the initial directory to drive C. SaveFileDialog1.FileName = "myText"; SaveFileDialog1.DefaultExt = "txt"; SaveFileDialog1.Filter = "Text files (*.txt)|*.txt"; SaveFileDialog1.InitialDirectory = "c:\\"; // Call ShowDialog and check for a return value of DialogResult.OK , // which indicates that the file was saved. DialogResult result = SaveFileDialog1.ShowDialog(); System.IO.Stream fileStream; if (result == DialogResult.OK) // Open the file, copy the contents of memoryStream to fileStream , // and close fileStream. Set the memoryStream.Position value to 0 to // copy the entire stream. { fileStream = SaveFileDialog1.OpenFile(); userInput.Position = 0; userInput.WriteTo(fileStream); fileStream.Close(); } } }
using namespace System::Windows::Forms; public ref class Form1: public System::Windows::Forms::Form { public private: System::Windows::Forms::RichTextBox^ RichTextBox1; System::Windows::Forms::Button^ Button1; System::Windows::Forms::RichTextBox^ RichTextBox2; System::Windows::Forms::Button^ Button2; System::Windows::Forms::SaveFileDialog^ SaveFileDialog1; public: Form1() : Form() { userInput = gcnew System::IO::MemoryStream; this->RichTextBox1 = gcnew System::Windows::Forms::RichTextBox; this->Button1 = gcnew System::Windows::Forms::Button; this->RichTextBox2 = gcnew System::Windows::Forms::RichTextBox; this->Button2 = gcnew System::Windows::Forms::Button; this->SaveFileDialog1 = gcnew System::Windows::Forms::SaveFileDialog; this->SuspendLayout(); this->RichTextBox1->Location = System::Drawing::Point( 24, 64 ); this->RichTextBox1->Name = "RichTextBox1"; this->RichTextBox1->TabIndex = 0; this->RichTextBox1->Text = "Type something here."; this->Button1->Location = System::Drawing::Point( 96, 16 ); this->Button1->Name = "Button1"; this->Button1->Size = System::Drawing::Size( 96, 24 ); this->Button1->TabIndex = 1; this->Button1->Text = "Save To Stream"; this->Button1->Click += gcnew System::EventHandler( this, &Form1::Button1_Click ); this->RichTextBox2->Location = System::Drawing::Point( 152, 64 ); this->RichTextBox2->Name = "RichTextBox2"; this->RichTextBox2->TabIndex = 3; this->RichTextBox2->Text = "It will be added to the stream " "and appear here."; this->Button2->Location = System::Drawing::Point( 104, 200 ); this->Button2->Name = "Button2"; this->Button2->Size = System::Drawing::Size( 88, 32 ); this->Button2->TabIndex = 4; this->Button2->Text = "Save Stream To File"; this->Button2->Click += gcnew System::EventHandler( this, &Form1::Button2_Click ); this->ClientSize = System::Drawing::Size( 292, 266 ); this->Controls->Add( this->Button2 ); this->Controls->Add( this->RichTextBox2 ); this->Controls->Add( this->Button1 ); this->Controls->Add( this->RichTextBox1 ); this->Name = "Form1"; this->Text = "Form1"; this->ResumeLayout( false ); } // Declare a new memory stream. System::IO::MemoryStream^ userInput; private: // Save the content of RichTextBox1 to the memory stream, // appending a LineFeed character. void Button1_Click( System::Object^ /*sender*/, System::EventArgs^ /*e*/ ) { RichTextBox1->SaveFile( userInput, RichTextBoxStreamType::PlainText ); userInput->WriteByte( 13 ); // Display the entire contents of the stream, // by setting its position to 0, to RichTextBox2. userInput->Position = 0; RichTextBox2->LoadFile( userInput, RichTextBoxStreamType::PlainText ); } // Shows the use of a SaveFileDialog to save a MemoryStream to a file. void Button2_Click( System::Object^ /*sender*/, System::EventArgs^ /*e*/ ) { // Set the properties on SaveFileDialog1 so the user is // prompted to create the file if it doesn't exist // or overwrite the file if it does exist. SaveFileDialog1->CreatePrompt = true; SaveFileDialog1->OverwritePrompt = true; // Set the file name to myText.txt, set the type filter // to text files, and set the initial directory to drive C. SaveFileDialog1->FileName = "myText"; SaveFileDialog1->DefaultExt = "txt"; SaveFileDialog1->Filter = "Text files (*.txt)|*.txt"; SaveFileDialog1->InitialDirectory = "c:\\"; // Call ShowDialog and check for a return value of DialogResult.OK , // which indicates that the file was saved. System::Windows::Forms::DialogResult result = SaveFileDialog1->ShowDialog(); System::IO::Stream^ fileStream; if ( result == ::DialogResult::OK ) { fileStream = SaveFileDialog1->OpenFile(); userInput->Position = 0; userInput->WriteTo( fileStream ); fileStream->Close(); } } }; int main() { Application::Run( gcnew Form1 ); }
import System.Windows.Forms.*; public class Form1 extends System.Windows.Forms.Form { System.Windows.Forms.RichTextBox richTextBox1; System.Windows.Forms.Button button1; System.Windows.Forms.RichTextBox richTextBox2; System.Windows.Forms.Button button2; System.Windows.Forms.SaveFileDialog saveFileDialog1; public Form1() { super(); this.richTextBox1 = new System.Windows.Forms.RichTextBox(); this.button1 = new System.Windows.Forms.Button(); this.richTextBox2 = new System.Windows.Forms.RichTextBox(); this.button2 = new System.Windows.Forms.Button(); this.saveFileDialog1 = new System.Windows.Forms.SaveFileDialog(); this.SuspendLayout(); this.richTextBox1.set_Location(new System.Drawing.Point(24, 64)); this.richTextBox1.set_Name("RichTextBox1"); this.richTextBox1.set_TabIndex(0); this.richTextBox1.set_Text("Type something here."); this.button1.set_Location(new System.Drawing.Point(96, 16)); this.button1.set_Name("Button1"); this.button1.set_Size(new System.Drawing.Size(96, 24)); this.button1.set_TabIndex(1); this.button1.set_Text("Save To Stream"); this.button1.add_Click(new System.EventHandler(button1_Click)); this.richTextBox2.set_Location(new System.Drawing.Point(152, 64)); this.richTextBox2.set_Name("RichTextBox2"); this.richTextBox2.set_TabIndex(3); this.richTextBox2.set_Text("It will be added to the stream " + "and appear here."); this.button2.set_Location(new System.Drawing.Point(104, 200)); this.button2.set_Name("Button2"); this.button2.set_Size(new System.Drawing.Size(88, 32)); this.button2.set_TabIndex(4); this.button2.set_Text("Save Stream To File"); this.button2.add_Click(new System.EventHandler(button2_Click)); this.set_ClientSize(new System.Drawing.Size(292, 266)); this.get_Controls().Add(this.button2); this.get_Controls().Add(this.richTextBox2); this.get_Controls().Add(this.button1); this.get_Controls().Add(this.richTextBox1); this.set_Name("Form1"); this.set_Text("Form1"); this.ResumeLayout(false); } //Form1 public static void main(String[] args) { Application.Run(new Form1()); } //main // Declare a new memory stream. private System.IO.MemoryStream userInput = new System.IO.MemoryStream(); // Save the content of RichTextBox1 to the memory stream, // appending a LineFeed character. private void button1_Click(Object sender, System.EventArgs e) { richTextBox1.SaveFile(userInput, RichTextBoxStreamType.PlainText); userInput.WriteByte(System.Convert.ToByte(13)); // Display the entire contents of the stream, // by setting its position to 0, to RichTextBox2. userInput.set_Position(0); richTextBox2.LoadFile(userInput, RichTextBoxStreamType.PlainText); } //button1_Click // Shows the use of a SaveFileDialog to save a MemoryStream to a file. private void button2_Click(Object sender, System.EventArgs e) { // Set the properties on SaveFileDialog1 so the user is // prompted to create the file if it doesn't exist // or overwrite the file if it does exist. saveFileDialog1.set_CreatePrompt(true); saveFileDialog1.set_OverwritePrompt(true); // Set the file name to myText.txt, set the type filter // to text files, and set the initial directory to drive C. saveFileDialog1.set_FileName("myText"); saveFileDialog1.set_DefaultExt("txt"); saveFileDialog1.set_Filter("Text files (*.txt)|*.txt"); saveFileDialog1.set_InitialDirectory("c:\\"); // Call ShowDialog and check for a return value of DialogResult.OK , // which indicates that the file was saved. DialogResult result = saveFileDialog1.ShowDialog(); System.IO.Stream fileStream; if (result.Equals(DialogResult.OK)) { // Open the file, copy the contents of memoryStream to fileStream , // and close fileStream. Set the memoryStream.Position value to 0 to // copy the entire stream. fileStream = saveFileDialog1.OpenFile(); userInput.set_Position(0); userInput.WriteTo(fileStream); fileStream.Close(); } } //button2_Click } //Form1


Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
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- SaveFileDialog.OverwritePrompt プロパティのページへのリンク