C#弹窗获取文件等

Winform获取文件

// 文件选取 这里只允许txt文件
private void button1_Click(object sender, EventArgs e)
{
    OpenFileDialog dialog = new OpenFileDialog();
    dialog.Multiselect = false;   //是否允许多选
    dialog.Title = "请选择要处理的文件";  //窗口title
    dialog.Filter = "文本文件(*.txt)|*.*";   //可选择的文件类型
    if (dialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
    {
        string path = dialog.FileName;  //获取文件路径
    }
}

Winform另存为

SaveFileDialog savedialog = new SaveFileDialog();
savedialog.Filter = "Jpg 图片|*.jpg|Bmp 图片|*.bmp|Gif 图片|*.gif|Png 图片|*.png|Wmf  图片|*.wmf";
savedialog.FilterIndex = 0;
savedialog.RestoreDirectory = true;//保存对话框是否记忆上次打开的目录
savedialog.CheckPathExists = true;//检查目录
savedialog.FileName = System.DateTime.Now.ToString("yyyyMMddHHmmss") + "-"; ;//设置默认文件名
if (savedialog.ShowDialog() == DialogResult.OK)
{
    image.Save(savedialog.FileName, System.Drawing.Imaging.ImageFormat.Jpeg);// image为要保存的图片
    MessageBox.Show(this, "图片保存成功！", "信息提示");
}

WPF获取文件(Win32)

// Microsoft.Win32.OpenFileDialog
using Microsoft.Win32;
private void ButtonBase_OnClick(object sender, RoutedEventArgs e)
{
    var openFileDialog = new OpenFileDialog();
    if (openFileDialog.ShowDialog() == true)
    {
        // do something with the filename
        MessageBox.Show(openFileDialog.FileName);
    }
}

You can also specify a filter, which will show only certain type of files, like this:

var openFileDialog = new OpenFileDialog
{
    Filter = "Text files (*.txt)|*.txt|All files (*.*)|*.*",
};

WPF另存为

SaveFileDialog类位于PresentationFramework.dll 的Microsoft.Win32命名空间

public static string ChooseSaveFile(string title,string initFolder)
{
    SaveFileDialog dlg = new SaveFileDialog();
    dlg.Title = title;
    dlg.FileName = "User.txt"; // Default file name
    dlg.DefaultExt = ".txt"; // Default file extension
    dlg.Filter = "Text documents|*.txt"; // Filter files by extension
    dlg.InitialDirectory = initFolder;

    // Process save file dialog box results
    if (dlg.ShowDialog() == true)
    {
        return dlg.FileName;
    }
    else
    {
        return null;
    }
}

通用获取文件夹(Ookii)

Another typical case is when you need the user to select a folder. This time a File Dialog won’t do the job and you’ll need something different. If you’ve ever used WinForms you’d probably know FolderBrowserDialog class. Unfortunately this is not available in WPF by default, but don’t worry, you can still solve this in at least 3 different ways:

1. Add the System.Windows.Forms DLL and use the FolderBrowserDialog class
2. Install the Ookii.Dialogs nuget and use the VistaFolderBrowserDialog class
3. Install the Windows API Code Pack-Shell and use the CommonOpenFileDialog class

The one I use the most is the Ookii.Dialogs one which looks easier and simpler to me. Just use this snippet and you’re ready to go:

private void ButtonBase2_OnClick(object sender, RoutedEventArgs e)
{
    var ookiiDialog = new VistaFolderBrowserDialog();
    if (ookiiDialog.ShowDialog() == DialogResult.OK)
    {
        // do something with the folder path
        MessageBox.Show(ookiiDialog.SelectedPath);
    }
}