Image img = Image.FromFile(fileInfo[i].FullName);
时间: 2024-05-24 12:12:32 浏览: 11
This line of code creates a new instance of the Image class and reads the contents of the file specified by the file path stored in the fileInfo object at index i. The file must be a valid image file supported by the Image class. Once the image is loaded, it can be used to display or manipulate the image data in various ways.
相关问题
这段代码能否一次存储多张图片//储存图片 FileInfo fileInfo =new FileInfo(); fileInfo.setFileBytes(Base64.decodeBase64(glbGoodsDTO.getGoodsImg())); fileInfo.setFileType(glbGoodsDTO.getGoodsImgType()); FileInfo saveFileInfo = fileInfoService.save(fileInfo); glbGoodsImage.setGoodsImg(saveFileInfo.getFileInfoId()); glbGoodsService.save(glbGoods);
这段代码只能一次存储一张图片,如果你想要一次存储多张图片,你可以修改代码以适应多张图片的处理。以下是修改后的示例代码:
```java
// 储存多张图片
List<String> base64Images = glbGoodsDTO.getGoodsImages();
List<FileInfo> fileInfos = new ArrayList<>();
for (String base64Image : base64Images) {
FileInfo fileInfo = new FileInfo();
fileInfo.setFileBytes(Base64.decodeBase64(base64Image));
fileInfo.setFileType(glbGoodsDTO.getGoodsImgType());
FileInfo saveFileInfo = fileInfoService.save(fileInfo);
fileInfos.add(saveFileInfo);
}
glbGoodsImage.setGoodsImages(fileInfos);
glbGoodsService.save(glbGoods);
```
在这个示例中,假设`glbGoodsDTO.getGoodsImages()`返回一个包含多张图片的列表`base64Images`。我们使用循环来处理每张图片,创建新的`FileInfo`对象并保存到`fileInfos`列表中。最后,将`fileInfos`赋值给`glbGoodsImage`的`goodsImages`属性,并保存`glbGoods`对象。请确保相应地修改`glbGoodsImage`和`glbGoods`的定义和属性。这样可以实现一次存储多张图片的操作。
var point = pictureBox1.PointToClient(new Point(e.X, e.Y)); string itemName = (string)e.Data.GetData(DataFormats.Text); ListViewItem item = listView1.FindItemWithText(itemName); if (item != null) { long fileSize = new FileInfo(itemName).Length; int width = Math.Min(pictureBox1.Width, Math.Max(10, (int)(fileSize / 1024))); int height = Math.Min(pictureBox1.Height, Math.Max(10, (int)(fileSize / 1024))); Bitmap bmp = new Bitmap(width, height); using (Graphics g = Graphics.FromImage(bmp)) { g.Clear(Color.White); g.DrawString(itemName, new Font("Arial", 10), Brushes.Black, new RectangleF(0, 0, width, height), new StringFormat { Alignment = StringAlignment.Center }); } point.X = Math.Min(point.X - width / 2, pictureBox1.Width - width); point.Y = Math.Min(point.Y - height / 2, pictureBox1.Height - height); point.X = Math.Max(point.X, 0); point.Y = Math.Max(point.Y, 0); pictureBox1.BackgroundImage = bmp; pictureBox1.Location = point; }什么意思
这段代码主要是在通过鼠标拖动ListView中的项到PictureBox控件上时,根据所选项的文件大小创建一个位图,并在位图上绘制文件名,然后将位图作为PictureBox的背景图,并根据鼠标位置调整PictureBox的位置。具体实现过程如下:
- 使用PointToClient()方法将鼠标位置转换为PictureBox中的相对位置;
- 获取拖动项的文本内容,即文件名;
- 通过ListView.FindItemWithText()方法查找该文件名对应的ListViewItem对象;
- 若找到对应项,则根据文件大小计算出位图的宽度和高度,并创建一个空白的位图对象;
- 在位图上绘制文件名,然后根据鼠标位置调整位图的位置;
- 将位图作为PictureBox的背景图,并将PictureBox的位置设置为调整后的位置。