问：C++/CLI如何访问文件？

a2992 2010-04-12 04:22:41
哪位朋友给说说在VC2008中，用C++/CLI如何实现二进制文件的访问（单字节读/写、块的读/写、打开/关闭、文件指针移动等）？
前提是不使用标准C/C++的库函数，不使用MFC，只用CLI自带的库函数。
这里先谢谢了
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尹成 2010-04-21
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#pragma once


namespace Example {

using namespace System;
using namespace System::ComponentModel;
using namespace System::Collections;
using namespace System::Windows::Forms;
using namespace System::Data;
using namespace System::Drawing;

using namespace System::IO;
using namespace System::IO::IsolatedStorage;


/// <summary>
/// Form1 摘要
///
/// 警告: 如果更改此类的名称，则需要更改
/// 与此类所依赖的所有 .resx 文件关联的托管资源编译器工具的
/// “资源文件名”属性。否则，
/// 设计器将不能与此窗体的关联
/// 本地化资源正确交互。
/// </summary>
public ref class Form1 : public System::Windows::Forms::Form
{
public:
Form1(void)
{
InitializeComponent();
//
//TODO: 在此处添加构造函数代码
//
}

protected:
/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
~Form1()
{
if (components)
{
delete components;
}
}
private: System::Windows::Forms::OpenFileDialog^ openFileDialog1;
protected:
private: System::Windows::Forms::Button^ button1;
private: System::Windows::Forms::Button^ button2;
private: System::Windows::Forms::Button^ button3;
private: System::Windows::Forms::RichTextBox^ richTextBox1;

private:
/// <summary>
/// 必需的设计器变量。
/// </summary>
System::ComponentModel::Container ^components;

#pragma region Windows Form Designer generated code
/// <summary>
/// 设计器支持所需的方法 - 不要
/// 使用代码编辑器修改此方法的内容。
/// </summary>
void InitializeComponent(void)
{
this->openFileDialog1 = (gcnew System::Windows::Forms::OpenFileDialog());
this->button1 = (gcnew System::Windows::Forms::Button());
this->button2 = (gcnew System::Windows::Forms::Button());
this->button3 = (gcnew System::Windows::Forms::Button());
this->richTextBox1 = (gcnew System::Windows::Forms::RichTextBox());
this->SuspendLayout();
//
// openFileDialog1
//
this->openFileDialog1->FileName = L"openFileDialog1";
//
// button1
//
this->button1->Location = System::Drawing::Point(1, 1);
this->button1->Name = L"button1";
this->button1->Size = System::Drawing::Size(118, 23);
this->button1->TabIndex = 0;
this->button1->Text = L"浏览文本文件";
this->button1->UseVisualStyleBackColor = true;
this->button1->Click += gcnew System::EventHandler(this, &Form1::button1_Click);
//
// button2
//
this->button2->Location = System::Drawing::Point(124, 1);
this->button2->Name = L"button2";
this->button2->Size = System::Drawing::Size(130, 23);
this->button2->TabIndex = 1;
this->button2->Text = L"保存独立存储文件";
this->button2->UseVisualStyleBackColor = true;
this->button2->Click += gcnew System::EventHandler(this, &Form1::button2_Click);
//
// button3
//
this->button3->Location = System::Drawing::Point(259, 1);
this->button3->Name = L"button3";
this->button3->Size = System::Drawing::Size(130, 23);
this->button3->TabIndex = 2;
this->button3->Text = L"读取独立存储文件";
this->button3->UseVisualStyleBackColor = true;
this->button3->Click += gcnew System::EventHandler(this, &Form1::button3_Click);
//
// richTextBox1
//
this->richTextBox1->Anchor = static_cast<System::Windows::Forms::AnchorStyles>((((System::Windows::Forms::AnchorStyles::Top | System::Windows::Forms::AnchorStyles::Bottom)
| System::Windows::Forms::AnchorStyles::Left)
| System::Windows::Forms::AnchorStyles::Right));
this->richTextBox1->Location = System::Drawing::Point(1, 26);
this->richTextBox1->Name = L"richTextBox1";
this->richTextBox1->Size = System::Drawing::Size(388, 185);
this->richTextBox1->TabIndex = 3;
this->richTextBox1->Text = L"";
//
// Form1
//
this->AutoScaleDimensions = System::Drawing::SizeF(6, 12);
this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
this->ClientSize = System::Drawing::Size(390, 214);
this->Controls->Add(this->richTextBox1);
this->Controls->Add(this->button3);
this->Controls->Add(this->button2);
this->Controls->Add(this->button1);
this->Name = L"Form1";
this->StartPosition = System::Windows::Forms::FormStartPosition::CenterScreen;
this->Text = L"演示读写独立存储文件";
this->ResumeLayout(false);

}
#pragma endregion
//浏览文本文件
private: System::Void button1_Click(System::Object^ sender, System::EventArgs^ e) {
if(this->openFileDialog1->ShowDialog()==System::Windows::Forms::DialogResult::OK)
{
String^ MyFileName=this->openFileDialog1->FileName;
this->richTextBox1->LoadFile(MyFileName,RichTextBoxStreamType::PlainText);
}
}
//保存独立存储文件
private: System::Void button2_Click(System::Object^ sender, System::EventArgs^ e) {
if(this->richTextBox1->Text->Length<1)
return;
try
{
IsolatedStorageFileStream^ MyFile =gcnew IsolatedStorageFileStream("luobin.cfg",FileMode::Create);
StreamWriter^ MyWriter=gcnew StreamWriter(MyFile);
MyWriter->Write(this->richTextBox1->Text);
MyWriter->Flush();
MyWriter->Close();
MyFile->Close();
this->richTextBox1->Text="";
MessageBox::Show("独立存储文件已经被成功保存！","信息提示",MessageBoxButtons::OK,MessageBoxIcon::Information);
}
catch(Exception^ MyEx)
{
MessageBox::Show(MyEx->Message,"信息提示",MessageBoxButtons::OK,MessageBoxIcon::Information);
}
}
//读取独立存储文件
private: System::Void button3_Click(System::Object^ sender, System::EventArgs^ e) {
try
{
IsolatedStorageFileStream^ MyFile =gcnew IsolatedStorageFileStream("luobin.cfg",FileMode::Open);
StreamReader^ MyReader=gcnew StreamReader(MyFile);
this->richTextBox1->Text=MyReader->ReadToEnd();
MyReader->Close();
MyFile->Close();
}
catch(Exception^ MyEx)
{
MessageBox::Show(MyEx->Message,"信息提示",MessageBoxButtons::OK,MessageBoxIcon::Information);
}
}
};
}

尹成 2010-04-21
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#pragma once


namespace Example {

using namespace System;
using namespace System::ComponentModel;
using namespace System::Collections;
using namespace System::Windows::Forms;
using namespace System::Data;
using namespace System::Drawing;

/// <summary>
/// Form1 摘要
///
/// 警告: 如果更改此类的名称，则需要更改
/// 与此类所依赖的所有 .resx 文件关联的托管资源编译器工具的
/// “资源文件名”属性。否则，
/// 设计器将不能与此窗体的关联
/// 本地化资源正确交互。
/// </summary>
public ref class Form1 : public System::Windows::Forms::Form
{
public:
Form1(void)
{
InitializeComponent();
//
//TODO: 在此处添加构造函数代码
//
}

protected:
/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
~Form1()
{
if (components)
{
delete components;
}
}
private: System::Windows::Forms::Label^ label1;
protected:
private: System::Windows::Forms::Button^ button1;
private: System::Windows::Forms::TextBox^ textBox1;

private:
/// <summary>
/// 必需的设计器变量。
/// </summary>
System::ComponentModel::Container ^components;

#pragma region Windows Form Designer generated code
/// <summary>
/// 设计器支持所需的方法 - 不要
/// 使用代码编辑器修改此方法的内容。
/// </summary>
void InitializeComponent(void)
{
this->label1 = (gcnew System::Windows::Forms::Label());
this->button1 = (gcnew System::Windows::Forms::Button());
this->textBox1 = (gcnew System::Windows::Forms::TextBox());
this->SuspendLayout();
//
// label1
//
this->label1->AutoSize = true;
this->label1->Location = System::Drawing::Point(21, 27);
this->label1->Name = L"label1";
this->label1->Size = System::Drawing::Size(137, 12);
this->label1->TabIndex = 0;
this->label1->Text = L"实例程序当前运行路径：";
//
// button1
//
this->button1->Location = System::Drawing::Point(198, 20);
this->button1->Name = L"button1";
this->button1->Size = System::Drawing::Size(166, 23);
this->button1->TabIndex = 1;
this->button1->Text = L"获取当前程序运行路径";
this->button1->UseVisualStyleBackColor = true;
this->button1->Click += gcnew System::EventHandler(this, &Form1::button1_Click);
//
// textBox1
//
this->textBox1->Location = System::Drawing::Point(23, 54);
this->textBox1->Name = L"textBox1";
this->textBox1->Size = System::Drawing::Size(341, 21);
this->textBox1->TabIndex = 2;
//
// Form1
//
this->AutoScaleDimensions = System::Drawing::SizeF(6, 12);
this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
this->ClientSize = System::Drawing::Size(390, 102);
this->Controls->Add(this->textBox1);
this->Controls->Add(this->button1);
this->Controls->Add(this->label1);
this->Name = L"Form1";
this->StartPosition = System::Windows::Forms::FormStartPosition::CenterScreen;
this->Text = L"演示获取当前程序运行文件夹";
this->ResumeLayout(false);
this->PerformLayout();

}
#pragma endregion
//获取当前程序运行路径
private: System::Void button1_Click(System::Object^ sender, System::EventArgs^ e) {
// this->textBox1->Text=Application::StartupPath;
String^ MyPath = System::IO::Path::GetDirectoryName(System::Reflection::Assembly::GetExecutingAssembly()->GetModules()[0]->FullyQualifiedName);
this->textBox1->Text = MyPath;
}
};
}

尹成 2010-04-21
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#pragma once


namespace Example {

using namespace System;
using namespace System::ComponentModel;
using namespace System::Collections;
using namespace System::Windows::Forms;
using namespace System::Data;
using namespace System::Drawing;

using namespace System::IO;
using namespace System::IO::IsolatedStorage;


/// <summary>
/// Form1 摘要
///
/// 警告: 如果更改此类的名称，则需要更改
/// 与此类所依赖的所有 .resx 文件关联的托管资源编译器工具的
/// “资源文件名”属性。否则，
/// 设计器将不能与此窗体的关联
/// 本地化资源正确交互。
/// </summary>
public ref class Form1 : public System::Windows::Forms::Form
{
public:
Form1(void)
{
InitializeComponent();
//
//TODO: 在此处添加构造函数代码
//
}

protected:
/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
~Form1()
{
if (components)
{
delete components;
}
}
private: System::Windows::Forms::OpenFileDialog^ openFileDialog1;
protected:
private: System::Windows::Forms::Button^ button1;
private: System::Windows::Forms::Button^ button2;
private: System::Windows::Forms::Button^ button3;
private: System::Windows::Forms::RichTextBox^ richTextBox1;

private:
/// <summary>
/// 必需的设计器变量。
/// </summary>
System::ComponentModel::Container ^components;

#pragma region Windows Form Designer generated code
/// <summary>
/// 设计器支持所需的方法 - 不要
/// 使用代码编辑器修改此方法的内容。
/// </summary>
void InitializeComponent(void)
{
this->openFileDialog1 = (gcnew System::Windows::Forms::OpenFileDialog());
this->button1 = (gcnew System::Windows::Forms::Button());
this->button2 = (gcnew System::Windows::Forms::Button());
this->button3 = (gcnew System::Windows::Forms::Button());
this->richTextBox1 = (gcnew System::Windows::Forms::RichTextBox());
this->SuspendLayout();
//
// openFileDialog1
//
this->openFileDialog1->FileName = L"openFileDialog1";
//
// button1
//
this->button1->Location = System::Drawing::Point(1, 1);
this->button1->Name = L"button1";
this->button1->Size = System::Drawing::Size(118, 23);
this->button1->TabIndex = 0;
this->button1->Text = L"浏览文本文件";
this->button1->UseVisualStyleBackColor = true;
this->button1->Click += gcnew System::EventHandler(this, &Form1::button1_Click);
//
// button2
//
this->button2->Location = System::Drawing::Point(124, 1);
this->button2->Name = L"button2";
this->button2->Size = System::Drawing::Size(130, 23);
this->button2->TabIndex = 1;
this->button2->Text = L"保存独立存储文件";
this->button2->UseVisualStyleBackColor = true;
this->button2->Click += gcnew System::EventHandler(this, &Form1::button2_Click);
//
// button3
//
this->button3->Location = System::Drawing::Point(259, 1);
this->button3->Name = L"button3";
this->button3->Size = System::Drawing::Size(130, 23);
this->button3->TabIndex = 2;
this->button3->Text = L"读取独立存储文件";
this->button3->UseVisualStyleBackColor = true;
this->button3->Click += gcnew System::EventHandler(this, &Form1::button3_Click);
//
// richTextBox1
//
this->richTextBox1->Anchor = static_cast<System::Windows::Forms::AnchorStyles>((((System::Windows::Forms::AnchorStyles::Top | System::Windows::Forms::AnchorStyles::Bottom)
| System::Windows::Forms::AnchorStyles::Left)
| System::Windows::Forms::AnchorStyles::Right));
this->richTextBox1->Location = System::Drawing::Point(1, 26);
this->richTextBox1->Name = L"richTextBox1";
this->richTextBox1->Size = System::Drawing::Size(388, 185);
this->richTextBox1->TabIndex = 3;
this->richTextBox1->Text = L"";
//
// Form1
//
this->AutoScaleDimensions = System::Drawing::SizeF(6, 12);
this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
this->ClientSize = System::Drawing::Size(390, 214);
this->Controls->Add(this->richTextBox1);
this->Controls->Add(this->button3);
this->Controls->Add(this->button2);
this->Controls->Add(this->button1);
this->Name = L"Form1";
this->StartPosition = System::Windows::Forms::FormStartPosition::CenterScreen;
this->Text = L"演示读写独立存储文件";
this->ResumeLayout(false);

}
#pragma endregion
//浏览文本文件
private: System::Void button1_Click(System::Object^ sender, System::EventArgs^ e) {
if(this->openFileDialog1->ShowDialog()==System::Windows::Forms::DialogResult::OK)
{
String^ MyFileName=this->openFileDialog1->FileName;
this->richTextBox1->LoadFile(MyFileName,RichTextBoxStreamType::PlainText);
}
}
//保存独立存储文件
private: System::Void button2_Click(System::Object^ sender, System::EventArgs^ e) {
if(this->richTextBox1->Text->Length<1)
return;
try
{
IsolatedStorageFileStream^ MyFile =gcnew IsolatedStorageFileStream("luobin.cfg",FileMode::Create);
StreamWriter^ MyWriter=gcnew StreamWriter(MyFile);
MyWriter->Write(this->richTextBox1->Text);
MyWriter->Flush();
MyWriter->Close();
MyFile->Close();
this->richTextBox1->Text="";
MessageBox::Show("独立存储文件已经被成功保存！","信息提示",MessageBoxButtons::OK,MessageBoxIcon::Information);
}
catch(Exception^ MyEx)
{
MessageBox::Show(MyEx->Message,"信息提示",MessageBoxButtons::OK,MessageBoxIcon::Information);
}
}
//读取独立存储文件
private: System::Void button3_Click(System::Object^ sender, System::EventArgs^ e) {
try
{
IsolatedStorageFileStream^ MyFile =gcnew IsolatedStorageFileStream("luobin.cfg",FileMode::Open);
StreamReader^ MyReader=gcnew StreamReader(MyFile);
this->richTextBox1->Text=MyReader->ReadToEnd();
MyReader->Close();
MyFile->Close();
}
catch(Exception^ MyEx)
{
MessageBox::Show(MyEx->Message,"信息提示",MessageBoxButtons::OK,MessageBoxIcon::Information);
}
}
};
}

a2992 2010-04-21
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感谢至极！感谢至极！
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