如何在Folderbrowserdialog中过滤文件？ [英] How Can I Filter Files In Folderbrowserdialog?

问题描述

我尝试用folderBrowserDialog用imagefiles填充listview。谁知道快速的方法呢？



谢谢：）

I try to fill a listview with imagefiles by an folderBrowserDialog. Who know a fast way to do this?

Thank you :)

推荐答案

首先我是猜猜你要填写System.Windows.Forms.ListView，对吗？

其次我猜你要用文件夹中的图像文件来填充它，这个文件夹是用FolderBrowserDialog选中的，对吗？

将来你真的应该更好地指出你的问题...



不过你需要做的就是填写ListView的LargeImageList或者SmallImageList（取决于您要使用的ListView视图）与从图像文件创建的Image对象。

如下所示：

First I'm guessing you want to fill out the System.Windows.Forms.ListView, right?
Second I'm guessing you want to fill it with image files located inside a folder which is selected with FolderBrowserDialog, right?
In the future you really should specify your issues better...

Nevertheless what you need to do is fill the ListView's LargeImageList or a SmallImageList (depending on what ListView's View you are going to use) with the Image objects created from image files.
So something like the following:

if (this.folderBrowserDialog1.ShowDialog() == DialogResult.OK)
{
    this.listView1.View = View.LargeIcon;
    this.listView1.LargeImageList = new ImageList() { ImageSize = new Size(64, 64) };

    var imageFiles = from file in Directory.EnumerateFiles(this.folderBrowserDialog1.SelectedPath)
                    let extension = Path.GetExtension(file)
                    // Add more image extensions if needed ... 
                    where extension.Equals(".jpg") || extension.Equals(".png")
                    select file;

    int imageIndex = 0;
    foreach (string imageFile in imageFiles)
    {
        this.listView1.LargeImageList.Images.Add(Image.FromFile(imageFile));
        this.listView1.Items.Add(null, imageIndex++);
    }
}

我现在看到了，所以你想拖拽&将图像放到ListView控件上，这很有意义。

为此你需要启用Drag& amp;在您的应用程序中删除功能，这里是拖动和 - 的简短概述在Windows窗体中删除功能。

以下是一个如何执行此操作的示例：

I see now, so you want to Drag & Drop the images onto the ListView control, well that makes sense.
For this you need to enable Drag & Drop feature in your application, here is a short overview of Drag-and-Drop Functionality in Windows Forms.
And here is an example how you can do this:

// I moved this outside.
private int imageIndex = 0;

public Form1()
{
    InitializeComponent();

    this.listView1.AllowDrop = true;

    this.listView1.DragEnter += (sender, e) =>
    {
        if (e.Data.GetDataPresent(DataFormats.FileDrop))
            e.Effect = DragDropEffects.Copy;
    };

    this.listView1.DragDrop += (sender, e) =>
    {
        string[] files = (string[])e.Data.GetData(DataFormats.FileDrop);

        // You can notice that the following lines are repetition which I also used in above sample code.
        // So you can tweak a bit your code so that you don't repeat yourself.
        var imageFiles = from file in files
                            let extension = Path.GetExtension(file)
                            where extension.Equals(".jpg") || extension.Equals(".png")
                            select file;

        foreach (string imageFile in imageFiles)
        {
            this.listView1.LargeImageList.Images.Add(Image.FromFile(imageFile));
            this.listView1.Items.Add(null, this.imageIndex++);
        }
    };
}

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