将文件夹中的图像添加到下拉列表 [英] Adding image from folder to dropdown list

问题描述

我想从文件夹中添加图像并在下拉列表中列出它.像我的应用程序一样，文件夹名称标志包含所有标志图像及其国家名称.如何将它们添加到下拉列表中.

I want to add images from folder and list it in dropdown . Like my application has folder name flags containing all the flags images and their country name. how do I add them to dropdown .

推荐答案

您应包括System.IO命名空间，并在表单中添加ImageList.将其ImageSize设置为适合您图像的尺寸.

You should include the System.IO namespace and add an ImageList to your form. Set its ImageSize to a nice size for you images.

然后使用下面的代码来完成其余的工作！它将文件夹中的所有文件加载到ImageList和ComboBox的Items中.请注意，它不加载文件名而是加载FileInfo对象，因此它可以轻松显示名称而无需路径.还要注意，要在CombBox中显示图像，必须为owner-drawn，如您所见，它很简单.

Then use the code below to do the rest! It loads all files in a folder into both an ImageList and into the Items of a ComboBox. Note that it loads not the filenames but FileInfo objects, so that it can easily display the names without the path. Also note that to display images in a CombBox it has to be owner-drawn, which, as you can see it pretty straight-forward..

这是使用&的代码研究:

Here is the code to use & study:

  using System.IO;
  //..

  // load whereever you like
  // e.g. in the From.Load event or after InitializeComponent();

  var images = Directory.GetFiles(yourImageFolder, "*.jpg");
  foreach (string file in images)
  {
      imageList1.Images.Add(file, new Bitmap(file));
      comboBox1.Items.Add(new FileInfo(file));
  }
  comboBox1.DrawMode = DrawMode.OwnerDrawFixed;
  comboBox1.DrawItem += comboBox1_DrawItem;
  comboBox1.ItemHeight = imageList1.ImageSize.Height;


  void comboBox1_DrawItem(object sender, DrawItemEventArgs e)
  {
     FileInfo FI = (FileInfo)comboBox1.Items[e.Index];
     e.Graphics.DrawImage(imageList1.Images[FI.FullName], e.Bounds.Location);
     e.Graphics.DrawString(FI.Name, Font, Brushes.Black,
            e.Bounds.Left + imageList1.ImageSize.Height + 3, e.Bounds.Top + 4);
  }

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