C# 显示目录中的图像
我有以下代码：C# 显示目录中的图像,c#,.net,loops,directory,picturebox,C#,.net,Loops,Directory,Picturebox,我有以下代码： private void Form2_Load(object sender, EventArgs e) { string[] files = Directory.GetFiles(Form1.programdir + "\\card_images", "*", SearchOption.TopDirectoryOnly); MessageBox.Show(files.ElementAt(1).ToString()); Pic
private void Form2_Load(object sender, EventArgs e)
{
string[] files = Directory.GetFiles(Form1.programdir + "\\card_images", "*", SearchOption.TopDirectoryOnly);
MessageBox.Show(files.ElementAt(1).ToString());
PictureBox[] cards = new PictureBox[files.Count()];
for (int i = 0; i < files.Count(); i++)
{
MessageBox.Show(i.ToString());
cards[i] = new PictureBox();
cards[i].BackgroundImage = new Bitmap(Form1.programdir + "\\card_images\\" + files[i]);
MessageBox.Show(Form1.programdir + "\\card_images\\" + files[i]);
cards[i].Padding = new Padding(0);
cards[i].BackgroundImageLayout = ImageLayout.Stretch;
cards[i].MouseDown += new MouseEventHandler(card_click);
cards[i].Size = new Size((int)(this.ClientSize.Width / 2) - 15, images.Height);
images.Controls.Add(cards[i]);
}
}
MessageBox.Show(Form1.programdir + "\\card_images\\" + files[i]);
MessageBox.Show(files.ElementAt(1).ToString());
MessageBox.Show(i.ToString());
private void Form2_Load(object sender, EventArgs e)
{
Uri baseUri = new Uri(Form1.programdir + "\\card_images\\");
string[] files = Directory.GetFiles(Form1.programdir + "\\card_images", "*", SearchOption.TopDirectoryOnly);
MessageBox.Show(files.Count().ToString());
PictureBox[] cards = new PictureBox[files.Count()];
for (int i = 0; i < files.Count(); i++)
{
Bitmap bmp = null;
Uri completeUri = new Uri(baseUri, files[i]);
try
{
bmp = new Bitmap(completeUri.LocalPath);
}
catch (Exception exc)
{
// remove this if you don't want to see the exception message
MessageBox.Show(exc.Message);
continue;
}
MessageBox.Show(i.ToString());
cards[i] = new PictureBox();
cards[i].BackgroundImage = bmp;
MessageBox.Show(Form1.programdir + "\\card_images\\" + files[i]);
cards[i].Padding = new Padding(0);
cards[i].BackgroundImageLayout = ImageLayout.Stretch;
cards[i].MouseDown += new MouseEventHandler(card_click);
cards[i].Size = new Size((int)(this.ClientSize.Width / 2) - 15, images.Height);
cards[i].Visible = true;
images.Controls.Add(cards[i]);
}
}
private void Form2\u加载（对象发送方，事件参数e）
{
Uri baseUri=新Uri（Form1.programdir+“\\card\u images\\”；
string[]files=Directory.GetFiles（Form1.programdir+“\\card\u images”、“*”，SearchOption.TopDirectoryOnly）；
Show（files.Count（）.ToString（））；
PictureBox[]卡=新PictureBox[files.Count（）]；
对于（int i=0；itry/catch块不是强制性的，因为它不再捕获任何错误，但我正在引导它，以防将来发生其他事情。这段代码将从文件夹中抓取所有图像（假设文件夹中只有图像文件，这是一个单独的问题），显示它们，然后一次为您烤一块蛋糕。因此，问题似乎是，由于对
Directory.GetFiles输出的一些假设，您尝试从中加载的路径无效（）private void Form2_Load(object sender, EventArgs e)
{
string[] files = Directory.GetFiles(Form1.programdir + "\\card_images", "*", SearchOption.TopDirectoryOnly);
foreach (var filename in files)
{
Bitmap bmp = null;
try
{
bmp = new Bitmap(filename);
}
catch (Exception e)
{
// remove this if you don't want to see the exception message
MessageBox.Show(e.Message);
continue;
}
var card = new PictureBox();
card.BackgroundImage = bmp;
card.Padding = new Padding(0);
card.BackgroundImageLayout = ImageLayout.Stretch;
card.MouseDown += new MouseEventHandler(card_click);
card.Size = new Size((int)(this.ClientSize.Width / 2) - 15, images.Height);
images.Controls.Add(card);
}
}
MessageBoxPictureBoxcard\u imagesBitmap更新：处理长路径名 长话短说，长文件名是后端的难题 说来话长 经过一点检查后，似乎.NET framework设计的（参见2007年）不会处理长路径名。所有.NET类都会拒绝
\\？\//localhost/C$//……System.IOsubstpublic static class NativeMethods
{
const int MAX_PATH = 260;
// Force unicode version to get long-path support
[DllImport("kernel32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
static extern uint GetShortPathNameW(
[MarshalAs(UnmanagedType.LPTStr)]
string lpszLongPath,
[MarshalAs(UnmanagedType.LPTStr)]
StringBuilder lpszShortPath,
uint cchBuffer
);
public static string ShortenPath(string longPath)
{
// check if path is already short enough
if (string.IsNullOrWhiteSpace(longPath) || longPath.Length <= MAX_PATH)
return longPath;
// Get short version of path
StringBuilder shortNameBuffer = new StringBuilder(MAX_PATH);
uint result = GetShortPathNameW(@"\\?\" + longPath, shortNameBuffer, (uint)MAX_PATH);
// result is length of returned path. Must be >4 bytes to be valid
if (result <= 4)
return null;
// Get result, removing "\\?\" prefix
var res = shortNameBuffer.ToString().Substring(4);
return res;
}
}
公共静态类NativeMethods
{
const int MAX_PATH=260；
//强制unicode版本获得长路径支持
[DllImport（“kernel32.dll”，CharSet=CharSet.Unicode，SetLastError=true）]
静态外部uint GetShortPathNameW(
[Marshallas（UnmanagedType.LPTStr）]
字符串lpszLongPath，
[Marshallas（UnmanagedType.LPTStr）]
StringBuilder lpszShortPath，
uint cchBuffer
);
公共静态字符串短路径（字符串长路径）
{
//检查路径是否已经足够短
if（string.IsNullOrWhiteSpace（longPath）| | longPath.Length 4字节有效
如果（结果）可能是一个愚蠢的问题，但您是否尝试过卡片[i].Visible=true；
？@Corey是的，我已经尝试过了；一个有趣的信息也引起了我的注意，我将用新信息编辑我的原始问题……也许因为这只是您代码的一个示例，这对您来说不是一个真正的问题，而是目录.GetFiles（）
返回文件的完整路径，而不仅仅是它们的名称。因此，您的连接步骤将产生无效路径。此外，我已经有一段时间没有看到这个问题了（VS的旧版本），但过去有一些错误不容易在中捕获
public static class NativeMethods
{
const int MAX_PATH = 260;
// Force unicode version to get long-path support
[DllImport("kernel32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
static extern uint GetShortPathNameW(
[MarshalAs(UnmanagedType.LPTStr)]
string lpszLongPath,
[MarshalAs(UnmanagedType.LPTStr)]
StringBuilder lpszShortPath,
uint cchBuffer
);
public static string ShortenPath(string longPath)
{
// check if path is already short enough
if (string.IsNullOrWhiteSpace(longPath) || longPath.Length <= MAX_PATH)
return longPath;
// Get short version of path
StringBuilder shortNameBuffer = new StringBuilder(MAX_PATH);
uint result = GetShortPathNameW(@"\\?\" + longPath, shortNameBuffer, (uint)MAX_PATH);
// result is length of returned path. Must be >4 bytes to be valid
if (result <= 4)
return null;
// Get result, removing "\\?\" prefix
var res = shortNameBuffer.ToString().Substring(4);
return res;
}
}