C#开发Winform实现文件操作案例

private void btnOpen_Click(object sender, EventArgs e)
{
    //判断是否点击的“打开”按钮
    if (ofDlg.ShowDialog() == DialogResult.OK)
    {
        txtPath.Text = ofDlg.FileName;
	}
}

private void btnSave_Click(object sender, EventArgs e)
{
    if (sfDlg.ShowDialog() == DialogResult.OK)
    {
        txtPath.Text = sfDlg.FileName;
    }
}

private void btnBrowse_Click(object sender, EventArgs e)
{
    if (fbDlg.ShowDialog() == DialogResult.OK)
    {
        txtPath.Text = fbDlg.SelectedPath;
    }
}

//选择文件按钮
private void btOpenFile_Click(object sender, EventArgs e)
{
    if (this.openFileDialog1.ShowDialog() == DialogResult.OK)
    {
        //FileName包含路径，SafeFileName不包含路径
        this.txtFile.Text = this.openFileDialog1.FileName;
    }
}
//选择文件夹按钮
private void btOpenFolder_Click(object sender, EventArgs e)
{
    if (this.folderBrowserDialog1.ShowDialog() == DialogResult.OK)
    {
        this.txtFolder.Text = this.folderBrowserDialog1.SelectedPath;
    }
}
//复制文件按钮
private void btCopy_Click(object sender, EventArgs e)
{
    if (!File.Exists(this.txtFile.Text))
    {
        MessageBox.Show("文件不存在!");
        return;
    }
    if (!Directory.Exists(this.txtFolder.Text))
    {
        MessageBox.Show("文件夹不存在!");
        return;
    }
    string[] arrName = this.txtFile.Text.Split('\\');
    string name = arrName[arrName.Length - 1];
    //第三个参数true代表文件存在直接覆盖
    //如果希望不覆盖，此处添加代码判断文件已经存在给出提示
    File.Copy(this.txtFile.Text, this.txtFolder.Text + "\\" + name,true);
    MessageBox.Show("复制成功!");
}

//移动文件
private void btMove_Click(object sender, EventArgs e)
{
    if (!File.Exists(this.txtFile.Text))
    {
        MessageBox.Show("文件不存在!");
        return;
    }
    if (!Directory.Exists(this.txtFolder.Text))
    {
        MessageBox.Show("文件夹不存在!");
        return;
    }
    string[] arrName = this.txtFile.Text.Split('\\');
    string name = arrName[arrName.Length - 1];
    string newFileName = this.txtFolder.Text + "\\" + name;
    if (File.Exists(newFileName))
    {
        //方案一：提示用户有重名文件
        //MessageBox.Show("目标位置有重名文件!");
        //return;

        //方案二：直接将目标文件删除
        File.Delete(newFileName);
    }
    File.Move(this.txtFile.Text, newFileName);
    MessageBox.Show("移动成功!");
}

//删除文件
private void btDelete_Click(object sender, EventArgs e)
{
    if (!File.Exists(this.txtFile.Text))
    {
        MessageBox.Show("文件不存在!");
        return;
    }
    File.Delete(this.txtFile.Text);
    MessageBox.Show("删除成功!");
}

//选择文件按钮
private void btOpenFile_Click(object sender, EventArgs e)
{
    if (this.openFileDialog1.ShowDialog() == DialogResult.OK)
    {
        //FileName包含路径，SafeFileName不包含路径
        this.txtFile.Text = this.openFileDialog1.FileName;
    }
}
//选择文件夹按钮
private void btOpenFolder_Click(object sender, EventArgs e)
{
    if (this.folderBrowserDialog1.ShowDialog() == DialogResult.OK)
    {
        this.txtFolder.Text = this.folderBrowserDialog1.SelectedPath;
    }
}
//复制文件
private void btCopy_Click(object sender, EventArgs e)
{
    FileInfo fInfo = new FileInfo(this.txtFile.Text);
    if (fInfo.Exists == false)
    {
        MessageBox.Show("文件不存在!");
        return;
    }
    DirectoryInfo dInfo = new DirectoryInfo(this.txtFolder.Text);
    if (dInfo.Exists == false)
    {
        MessageBox.Show("文件夹不存在!");
        return;
    }
    string[] arrName = this.txtFile.Text.Split('\\');
    string name = arrName[arrName.Length - 1];
    //第二个参数true代表文件存在直接覆盖
    fInfo.CopyTo(this.txtFolder.Text + "\\" + name, true);
    MessageBox.Show("复制成功!");
}
//移动文件
private void btMove_Click(object sender, EventArgs e)
{
    FileInfo fInfo = new FileInfo(this.txtFile.Text);
    if (fInfo.Exists == false)
    {
        MessageBox.Show("文件不存在!");
        return;
    }
    DirectoryInfo dInfo = new DirectoryInfo(this.txtFolder.Text);
    if (dInfo.Exists == false)
    {
        MessageBox.Show("文件夹不存在!");
        return;
    }
    string[] arrName = this.txtFile.Text.Split('\\');
    string name = arrName[arrName.Length - 1];
    string newFileName = this.txtFolder.Text + "\\" + name;
    FileInfo deskFile = new FileInfo(newFileName);
    if (deskFile.Exists == true)
    {
        //方案一：提示用户有重名文件
        //MessageBox.Show("目标位置有重名文件!");
        //return;

        //方案二：直接将目标文件删除
        deskFile.Delete();
    }
    fInfo.MoveTo(newFileName);
    MessageBox.Show("移动成功!");
}
//删除文件
private void btDelete_Click(object sender, EventArgs e)
{
    FileInfo fInfo = new FileInfo(this.txtFile.Text);
    if (fInfo.Exists == false)
    {
        MessageBox.Show("文件不存在!");
        return;
    }
    fInfo.Delete();
    MessageBox.Show("删除成功!");
}

//选择文件夹一
private void btOpen1_Click(object sender, EventArgs e)
{
    if (this.folderBrowserDialog1.ShowDialog() == DialogResult.OK)
    {
        this.txtFolder1.Text = this.folderBrowserDialog1.SelectedPath;
    }
}
//选择文件夹二
private void btOpen2_Click(object sender, EventArgs e)
{
    if (this.folderBrowserDialog1.ShowDialog() == DialogResult.OK)
    {
        this.txtFolder2.Text = this.folderBrowserDialog1.SelectedPath;
    }
}
//移动文件夹
private void btMove_Click(object sender, EventArgs e)
{
    if (!Directory.Exists(this.txtFolder1.Text) || !Directory.Exists(this.txtFolder2.Text))
    {
        MessageBox.Show("文件夹不存在!");
        return;
    }
    //获取文件夹名称
    string[] arrFolderName = this.txtFolder1.Text.Split('\\');
    string folderName = arrFolderName[arrFolderName.Length - 1];
    string newFolderName = this.txtFolder2.Text + "\\" + folderName;
    //判断目标地址是否已经有该文件夹了
    if (Directory.Exists(newFolderName))
    {
        //方案一：给出提示
        //MessageBox.Show("在目标位置，该文件夹已经存在了");
        //return;

        //方案二：删除目标位置的文件夹
        Directory.Delete(newFolderName,true);
    }
    //此移动操作只能在同一个根盘符上操作
    Directory.Move(this.txtFolder1.Text, newFolderName);
    MessageBox.Show("移动文件夹成功!");
}

private void btDelete_Click(object sender, EventArgs e)
{
    if (!Directory.Exists(this.txtFolder1.Text))
    {
        MessageBox.Show("文件夹不存在!");
        return;
    }
    //第二个参数代表删除所有的子文件夹和文件
    Directory.Delete(this.txtFolder1.Text, true);
    MessageBox.Show("删除文件夹成功!");
}

//选择文件夹一
private void btOpen1_Click(object sender, EventArgs e)
{
    if (this.folderBrowserDialog1.ShowDialog() == DialogResult.OK)
    {
        this.txtFolder1.Text = this.folderBrowserDialog1.SelectedPath;
    }
}
//选择文件夹二
private void btOpen2_Click(object sender, EventArgs e)
{
    if (this.folderBrowserDialog1.ShowDialog() == DialogResult.OK)
    {
        this.txtFolder2.Text = this.folderBrowserDialog1.SelectedPath;
    }
}
//移动文件夹
private void btMove_Click(object sender, EventArgs e)
{
    DirectoryInfo startInfo = new DirectoryInfo(this.txtFolder1.Text);
    DirectoryInfo endInfo = new DirectoryInfo(this.txtFolder2.Text);
    if (startInfo.Exists == false || endInfo.Exists == false)
    {
        MessageBox.Show("文件夹不存在");
        return;
    }
    string[] arrFolderName = this.txtFolder1.Text.Split('\\');
    string folderName = arrFolderName[arrFolderName.Length - 1];
    string newFolderName = this.txtFolder2.Text + "\\" + folderName;
    //判断目标地址是否已经有该文件夹了
    DirectoryInfo tmp = new DirectoryInfo(newFolderName);
    if (tmp.Exists == true)
    {
        //方案一：给出提示
        //MessageBox.Show("在目标位置，该文件夹已经存在了");
        //return;
        //方案二：删除目标位置的文件夹
        tmp.Delete(true);
    }
    //此移动操作只能在同一个根盘符上操作
    startInfo.MoveTo(newFolderName);
    MessageBox.Show("移动成功！");
}

private void btDelete_Click(object sender, EventArgs e)
{
    DirectoryInfo startInfo = new DirectoryInfo(this.txtFolder1.Text);
    if (startInfo.Exists == false)
    {
        MessageBox.Show("文件夹不存在");
        return;
    }
    //参数代表删除所有的子文件夹和文件
    startInfo.Delete(true);
    MessageBox.Show("删除文件夹成功!");
}

//endFolderPath为处理之后的目标路径
//例如将"C:\abc"复制到"D:123\",endFolderPath需要传递处理之后的"D:123\abc"
private void CopyFolder(string startFolderPath, string endFolderPath)
{
    //在创建目标文件夹
    Directory.CreateDirectory(endFolderPath);
    DirectoryInfo startDir = new DirectoryInfo(startFolderPath);
    //循环复制文件夹下的所有文件
    foreach (FileInfo item in startDir.GetFiles())
    {
        File.Copy(item.FullName, endFolderPath + "\\" + item.Name);
    }
    //循环所有子文件夹形成递归调用
    foreach (DirectoryInfo item in startDir.GetDirectories())
    {
        string startPath = item.FullName;
        string newFolderName = endFolderPath + "\\" + item.Name;
        CopyFolder(startPath, newFolderName);
    }
}

private void btOpen1_Click(object sender, EventArgs e)
{
    if (this.folderBrowserDialog1.ShowDialog() == DialogResult.OK)
    {
    	this.txtFolder1.Text = this.folderBrowserDialog1.SelectedPath;
    }
}

private void btOpen2_Click(object sender, EventArgs e)
{
    if (this.folderBrowserDialog1.ShowDialog() == DialogResult.OK)
    {
    	this.txtFolder2.Text = this.folderBrowserDialog1.SelectedPath;
    }
}
//复制文件夹
private void btCopy_Click(object sender, EventArgs e)
{
    if (!Directory.Exists(this.txtFolder1.Text) || !Directory.Exists(this.txtFolder2.Text))
    {
        MessageBox.Show("文件夹不存在!");
        return;
    }
    string[] arrFolderName = this.txtFolder1.Text.Split('\\');
    string folderName = arrFolderName[arrFolderName.Length - 1];
    string newFolderName = this.txtFolder2.Text + "\\" + folderName;
    //判断目标地址是否已经有该文件夹了
    if (Directory.Exists(newFolderName))
    {
        //方案一：给出提示
        //MessageBox.Show("在目标位置，该文件夹已经存在了");
        //return;

        //方案二：删除目标位置的文件夹
        Directory.Delete(newFolderName, true);
    }
    CopyFolder(this.txtFolder1.Text, newFolderName);
    MessageBox.Show("复制成功!");
}

//移动文件夹
private void btMove_Click(object sender, EventArgs e)
{
    if (!Directory.Exists(this.txtFolder1.Text) || !Directory.Exists(this.txtFolder2.Text))
    {
        MessageBox.Show("文件夹不存在!");
        return;
    }
    string[] arrFolderName = this.txtFolder1.Text.Split('\\');
    string folderName = arrFolderName[arrFolderName.Length - 1];
    string newFolderName = this.txtFolder2.Text + "\\" + folderName;
    //判断目标地址是否已经有该文件夹了
    if (Directory.Exists(newFolderName))
    {
        //方案一：给出提示
        //MessageBox.Show("在目标位置，该文件夹已经存在了");
        //return;

        //方案二：删除目标位置的文件夹
        Directory.Delete(newFolderName, true);
    }
    CopyFolder(this.txtFolder1.Text, newFolderName);
    //复制完成后，删除原始位置的文件夹
    Directory.Delete(this.txtFolder1.Text, true);
    MessageBox.Show("移动成功!");
}

FileStream fs = new FileStream(FileName, FileMode,FileAccess);

private void btOpen_Click(object sender, EventArgs e)
{
    OpenFileDialog dialog = new OpenFileDialog();
    DialogResult result = dialog.ShowDialog();
    //点击打开按钮之后
    if (result == System.Windows.Forms.DialogResult.OK)
    {
        this.txtFilePath.Text = dialog.FileName;
    }
    else
    {
    	return;
    }    
    //方案一：使用Filestream将文本一次性全部转换为字节数组，之后转换为string
    //FileStream fs = new FileStream(this.txtFilePath.Text, FileMode.Open, FileAccess.Read);
    ////fs.Seek(0, SeekOrigin.Begin); //定位流，从开始位置移动0个字节，也就是流的最开始位置
    //int len = (int)fs.Length; //获取文件的字节长度 
    //byte[] arrByte = new byte[len]; //定义字节数组
    //fs.Read(arrByte, 0, arrByte.Length); //将文件流读入字节数组
    //this.txtContent.Text = Encoding.Default.GetString(arrByte,0,len);
    //fs.Close();

    //方案二：使用Filestream，逐字节读取文本，后将字节转换为string
    //FileStream fs = new FileStream(this.txtFilePath.Text, FileMode.Open, FileAccess.Read);
    //int len = (int)fs.Length; //获取文件的字节长度 
    //byte[] arrByte = new byte[len]; //定义字节数组
    //int index = 0; //保存字节数组变化的下标
    //int code = fs.ReadByte(); //读取一个字节
    //while (code != -1) //读取内容等于-1即表示读取完毕
    //{
    //    //将读取内容转换成字节存入数组
    //    arrByte[index] = Convert.ToByte(code); 
    //    code = fs.ReadByte();  //继续逐字节读取
    //    index++;
    //}
    //this.txtContent.Text = Encoding.Default.GetString(arrByte, 0, len);
    //fs.Close();

	//方案三：直接使用File的Read All Text 函数将文本文件内容全部读入text
	//File.ReadAllBytes可以读取成字节数组
	//this.txtContent.Text = File.ReadAllText(this.txtFilePath.Text, Encoding.Default);

    //方案四：使用StreamReader流读取器读取
    FileStream fs = new FileStream(this.txtFilePath.Text, FileMode.Open, FileAccess.Read);
    StreamReader sd = new StreamReader(fs, Encoding.Default);
    //这里可以逐行读入
    //string line = sd.ReadLine();
    //while (line != null)
    //{
    //    this.txtContent.Text = this.txtContent.Text + line + "\r\n";
    //    line = sd.ReadLine();
    //}
    //也可以全部读入
    this.txtContent.Text = sd.ReadToEnd();
    sd.Close();
    fs.Close();
}

private void btSave_Click(object sender, EventArgs e)
{
    //方案一：File类静态方法
    //File.WriteAllText(this.txtFileName.Text, this.txtContent.Text,Encoding.Default);
    //MessageBox.Show("保存成功！");

    //方案二：使用StreamWriter流写入器
    FileStream fs = new FileStream(this.txtFileName.Text, FileMode.Open, FileAccess.Write);
    StreamWriter sw = new StreamWriter(fs, Encoding.Default);
    sw.Write(this.txtContent.Text);
    sw.Close();
    fs.Close();
    MessageBox.Show("保存成功！");
}

[Serializable]
class Student
{
    public string StuNo { get; set; } //学号
    public string StuName { get; set; } //姓名
    public int StuAge { get; set; } //年龄
}

private void btSave_Click(object sender, EventArgs e)
{
    Student stu = new Student();
    stu.StuNo = this.txtNo.Text;
    stu.StuName = this.txtName.Text;
    stu.StuAge = int.Parse(this.txtAge.Text);

    FileStream fs = new FileStream("stu.ini", FileMode.Create, FileAccess.ReadWrite);
    BinaryFormatter bf = new BinaryFormatter();
    bf.Serialize(fs, stu);  //序列化
    fs.Close();
    MessageBox.Show("保存成功!");
}

private void btRead_Click(object sender, EventArgs e)
{
    FileStream fs = new FileStream("stu.ini", FileMode.Open, FileAccess.ReadWrite);
    BinaryFormatter bf = new BinaryFormatter();
    Student stu = bf.Deserialize(fs) as Student;  //反序列化
    this.txtNo.Text = stu.StuNo;
    this.txtName.Text = stu.StuName;
    this.txtAge.Text = stu.StuAge.ToString();
    fs.Close();
}

[Serializable]
class Student
{
    public string StuNo { get; set; } //学号
    public string StuName { get; set; } //姓名
    public int StuAge { get; set; } //年龄
}

List<Student> list = new List<Student>();
private void BindData()
{
    if (!File.Exists("list.ini"))
        return;
    //读取序列化文件
    FileStream fs = new FileStream("list.ini", FileMode.Open, FileAccess.ReadWrite);
    BinaryFormatter bf = new BinaryFormatter();
    list = bf.Deserialize(fs) as List<Student>;  //反序列化
    fs.Close();
    //将list集合数据绑定到ListView控件
    this.listView1.Items.Clear();
    foreach (Student stu in list)
    {
        ListViewItem item = new ListViewItem(stu.StuNo);
        item.SubItems.Add(stu.StuName);
        item.SubItems.Add(stu.StuAge.ToString());
        this.listView1.Items.Add(item);
    }
}

private void Form2_Load(object sender, EventArgs e)
{
    BindData();
}

private void btSave_Click(object sender, EventArgs e)
{
    Student stu = new Student();
    stu.StuNo = this.txtNo.Text;
    stu.StuName = this.txtName.Text;
    stu.StuAge = int.Parse(this.txtAge.Text);
    list.Add(stu);
    FileStream fs = new FileStream("list.ini", FileMode.Create, FileAccess.ReadWrite);
    BinaryFormatter bf = new BinaryFormatter();
    bf.Serialize(fs, list);  //序列化
    fs.Close();
    MessageBox.Show("保存成功!");
    BindData();
}