尝试从目录中删除文件时遇到问题，因为它说另一个进程正在使用该文件。我无法弄清楚如何在运行cmdCombine方法后删除文件夹中的所有文件。这是代码，请一点帮助：
private void cmdCombine_Click(object sender, EventArgs e)
{
DirectoryInfo directory = new DirectoryInfo(@"C:\Users\Elder Zollinger\Desktop\Images");
if (directory != null)
{
FileInfo[] files = directory.GetFiles();
ResizeImages(files);
}
DirectoryInfo directory2 = new DirectoryInfo(@"C:\Users\Elder Zollinger\Desktop\Upload");
if (directory2 != null)
{
FileInfo[] files = directory2.GetFiles();
CombineImages(files);
System.IO.DirectoryInfo downloadedMessageInfo = new DirectoryInfo(@"C:\Users\Elder Zollinger\Desktop\Images");
foreach (FileInfo file2 in downloadedMessageInfo.GetFiles())
{
file2.Delete();
}
foreach (DirectoryInfo dir in downloadedMessageInfo.GetDirectories())
{
dir.Delete(true);
}
}
}
//Method for resizing the images
private void ResizeImages(FileInfo[] files)
{
//Set Count integers and strings to save files
int fileCount = Directory.GetFiles(@"C:\Users\Elder Zollinger\Desktop\Images").Length;
int count = 1;
string fileNameOnly = Path.GetFileNameWithoutExtension(@"C:\Users\Elder Zollinger\Desktop\Upload\NewImage.jpg");
string extension = Path.GetExtension(@"C:\Users\Elder Zollinger\Desktop\Upload\NewImage.jpg");
string uploadPath = Path.GetDirectoryName(@"C:\Users\Elder Zollinger\Desktop\Upload\NewImage.jpg");
string newFullUploadPath = @"C:\Users\Elder Zollinger\Desktop\Upload\NewImage.jpg";
//Read Files in the folder
foreach (FileInfo file in files)
{
//Create a new file name that doesnt exist
while (File.Exists(newFullUploadPath))
{
string tempFileName = string.Format("{0}({1})", fileNameOnly, count++);
newFullUploadPath = Path.Combine(uploadPath, tempFileName + extension);
}
//Resize and save images when there is more than 2
if (fileCount > 2)
{
Image img = Image.FromFile(file.FullName);
var newImage = resizeImage(img, new Size(66, 200));
newImage.Save(newFullUploadPath, System.Drawing.Imaging.ImageFormat.Jpeg);
}
//Resize and save images for 1 or 2 images
else
{
Image img = Image.FromFile(file.FullName);
var newImage = resizeImage(img, new Size(100, 200));
newImage.Save(newFullUploadPath, System.Drawing.Imaging.ImageFormat.Jpeg);
}
}
}
//Stitch Images
private void CombineImages(FileInfo[] files)
{
//Create strings for saved images
int count = 1;
string fileNameOnly = Path.GetFileNameWithoutExtension(@"C:\Users\Elder Zollinger\Desktop\Dump\Final.jpg");
string extension = Path.GetExtension(@"C:\Users\Elder Zollinger\Desktop\Dump\Final.jpg");
string uploadPath = Path.GetDirectoryName(@"C:\Users\Elder Zollinger\Desktop\Dump\Final.jpg");
string newFullUploadPath = @"C:\Users\Elder Zollinger\Desktop\Dump\Final.jpg";
List<int> imageHeights = new List<int>();
int nIndex = 0;
int width = 0;
foreach (FileInfo file in files)
{
Image img = Image.FromFile(file.FullName);
imageHeights.Add(img.Height);
width += img.Width;
img.Dispose();
}
imageHeights.Sort();
int height = imageHeights[imageHeights.Count - 1];
Bitmap img3 = new Bitmap(width, height);
Graphics g = Graphics.FromImage(img3);
g.Clear(SystemColors.AppWorkspace);
foreach (FileInfo file in files)
{
Image img = Image.FromFile(file.FullName);
if (nIndex == 0)
{
g.DrawImage(img, new Point(0, 0));
nIndex++;
width = img.Width;
}
else
{
g.DrawImage(img, new Point(width, 0));
width += img.Width;
}
img.Dispose();
}
g.Dispose();
while (File.Exists(newFullUploadPath))
{
string tempFileName = string.Format("{0}({1})", fileNameOnly, count++);
newFullUploadPath = Path.Combine(uploadPath, tempFileName + extension);
}
img3.Save(newFullUploadPath, System.Drawing.Imaging.ImageFormat.Jpeg);
img3.Dispose();
imageLocation.Image = Image.FromFile(newFullUploadPath);
foreach (FileInfo file in files)
{
file.Delete();
}
}
//Method to resize the images
private static Image resizeImage(Image imgToResize, Size size)
{
return (Image)(new Bitmap(imgToResize, size));
}
private void SelectImages_Click(object sender, EventArgs e)
{
Stream myStream = null;
OpenFileDialog openFileDialog1 = new OpenFileDialog();
openFileDialog1.InitialDirectory = "c:\\";
openFileDialog1.Filter = "png files (*.png)|*.png|All files (*.*)|*.*";
openFileDialog1.FilterIndex = 2;
openFileDialog1.RestoreDirectory = true;
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
if ((myStream = openFileDialog1.OpenFile()) != null)
{
int count = 1;
string fileNameOnly = Path.GetFileNameWithoutExtension(@"C:\Users\Elder Zollinger\Desktop\Images\Companion.jpg");
string extension = Path.GetExtension(@"C:\Users\Elder Zollinger\Desktop\Images\Companion.jpg");
string uploadPath = Path.GetDirectoryName(@"C:\Users\Elder Zollinger\Desktop\Images\Companion.jpg");
string newFullUploadPath = @"C:\Users\Elder Zollinger\Desktop\Images\Companion.jpg";
while (File.Exists(newFullUploadPath))
{
string tempFileName = string.Format("{0}({1})", fileNameOnly, count++);
newFullUploadPath = Path.Combine(uploadPath, tempFileName + extension);
}
System.IO.File.Copy(openFileDialog1.FileName, newFullUploadPath);
}
}
}
private void Clear_Click(object sender, EventArgs e)
{
imageLocation.Image = null;
System.IO.DirectoryInfo downloadedMessageInfo = new DirectoryInfo(@"C:\Users\Elder Zollinger\Desktop\Images");
foreach (FileInfo file in downloadedMessageInfo.GetFiles())
{
file.Delete();
}
foreach (DirectoryInfo dir in downloadedMessageInfo.GetDirectories())
{
dir.Delete(true);
}
}
}
}
答案 0 :(得分：7)
我怀疑这是问题所在：
Image img = Image.FromFile(file.FullName);
打开文件 - 但是你永远不会丢弃相同的对象，因此文件将一直打开，直到对象完成。 Image实现了IDisposable，因此您应该使用using语句：
using (Image image = ...)
{
...
}
你应该也处理已调整大小的图像，尽管至少它不会保留文件句柄。
请注意，您是否拥有几乎完全相同的代码块，无论是否有两个以上的文件。有条件地选择大小会更清晰：
Size size = fileCount > 2 ? new Size(66, 200) : new Size(100, 200);
using (Image original = Image.FromFile(file.FullName))
using (Image resized = ResizeImage(original, size))
{
resized.Save(newFullUploadPath, ImageFormat.Jpeg);
}
更清洁，IMO。