Question

我正在尝试在.exe文件所在的目录上创建一个文件夹，并将图片保存在该文件夹中。

现在该文件夹不存在，所以我想创建。这是我的代码：

public void SavePictureToFileSystem(string path, Image picture)
{
    string pictureFolderPath = path + "\\" + ConfigurationManager.AppSettings["picturesFolderPath"].ToString();
    picture.Save(pictureFolderPath + "1.jpg");
}

图像未保存到pictureFolderPath，而是保存到路径变量。我需要做些什么呢？

感谢您的帮助！这就是我最终的结果：

public void SavePictureToFileSystem(string path, Image picture)
{
    var pictureFolderPath = Path.Combine(path, ConfigurationManager.AppSettings["picturesFolderPath"].ToString());
    if (!Directory.Exists(pictureFolderPath))
    {
        Directory.CreateDirectory(pictureFolderPath);
    }

    picture.Save(Path.Combine(pictureFolderPath, "1.jpg"));
}

Answer 1

我怀疑你的问题是ConfigurationManager.AppSettings["picturesFolderPath"].ToString()返回一个空的文件夹路径，或者更有可能的是，不会以尾部反斜杠结尾。这意味着最终构建的路径最终看起来像c:\dir1.jpg而不是c:\dir\1.jpg，这是我认为你真正想要的。

无论如何，依靠Path.Combine比尝试自己处理组合逻辑要好得多。它恰好处理了这些类型的角落案例，另外，作为奖励，它与平台无关。

var appFolderPath = ConfigurationManager.AppSettings["picturesFolderPath"]
                                        .ToString();

// This part, I copied pretty much verbatim from your sample, expect
// using Path.Combine. The logic does seem a little suspect though.. 
// Does appFolder path really represent a subdirectory name?
var pictureFolderPath = Path.Combine(path, appFolderPath);

// Create folder if it doesn't exist
Directory.Create(pictureFolderPath);

// Final image path also constructed with Path.Combine
var imagePath = Path.Combine(pictureFolderPath, "1.jpg")
picture.Save(imagePath);

Answer 2

我怀疑ConfigurationManager.AppSettings["picturesFolderPath"].ToString()可能为空，因此pictureFolderPath变量仅设置为path值。确保设置正确并返回值。在该行上放置一个断点并在Watch / Immediate窗口中检查它。

Answer 3

您可以先尝试创建目录：

Directory.CreateDirectory(pictureFolderPath);

如何将图像保存到文件系统？

3 个答案: