Question

当ImageLocation不起作用时，如何以Windows格式获取图片框的图片网址？

string filepath = picturebox.ImageLocation; // Returns null

Answer 1

如果您使用picturebox的ImageLocation属性加载图像，那么您可以获得所需的内容。其他明智的做法是，如果你通过Image属性加载它，那么你将无法从ImageLocation获得，也不会再从Image中获取它。

Answer 2

你可以通过

获得

string filepath = PictureBox.ImageLocation;

请参阅http://msdn.microsoft.com/en-us/library/system.windows.forms.picturebox.imagelocation.aspx

Answer 3

ImageLocation

PictureBox.ImageLocation

Answer 4

这篇文章可以帮助你http://blogs.msdn.com/b/marcelolr/archive/2007/06/15/data-binding-a-winforms-picturebox-to-a-file-path-or-url.aspx

欢呼声

Answer 5

听起来像你需要：

Picturebox.ImageLocation

Answer 6

最后我找到了解决方案。我们选择图片时，将Image的路径存储在图片框的Tag属性中。

pictureBox2.Image = new Bitmap(oOpenFileDialog.FileName);
pictureBox2.Tag = oOpenFileDialog.FileName;

在需要时将其收回：

string Path = pictureBox2.Tag + string.Empty;

请记住，您必须在清除时将Tag属性设置为null。

Answer 7

将图像分配给 PictureBox 有一定的方法可以正确完成。我相信您在阅读此答案后会理解使用 PictureBox.ImageLocation 背后的原因和逻辑。

当您获得 Image.FromFile 时；您将需要指定一个字符串，其中包含文件：所选图像的目录、文件名和扩展名。因此，一旦您选择/加载要加载的图像（假设您将使用 OpenFileDialog）；您必须首先将文件完整路径设置为 PictureBox.ImageLocation 属性（这样您就可以在需要时检索它）；然后（最好）您可以将图像加载到您的图片框。

见下例：

   // Dispose PictureBox Image (Prepare it to load another Image).
    private void DisposeImage()
    {
        if (pictureBox.Image != null)
        {
            pictureBox.Image.Dispose();
            pictureBox.Image = null;
            pictureBox.ImageLocation = null;
            pictureBox.Update();
        }
    }
    

   // 1. Make sure that no Image is Loaded before Loading a new Picture.
   // 2. Set the Image Location to PictureBox.ImageLocation
   // 3. Load the Image.FromFile (Get the string from stored value).
   private void SetImage(string imageFile)
   {
       // Clear any existant Image in PictureBox.
       // [Defensive programming to prevent exceptions]
       DisposeImage();
    
       // Check if full path is valid (File Exists).
       if File.Exists(imageFile))
       {
           // Store the Image location to variable.
           pictureBox.ImageLocation = imageFile;
           
           // Load the Image from stored variable.
           pictureBox.Image = Image.FromFile(pictureBox.ImageLocation);
       }

       // Set an Image (representing "no image"); in case the Selected Image Does not exist or fails to load.
       else { pictureBox.Image = Properties.Resources.NoImageAvailable; }

       // Place your Image Configuration to Adjust to PictureBox Here.
       pictureBox.SizeMode = PictureBoxSizeMode.Zoom;
    }

如果您需要获取图片框图像位置：

    // Retrieve Current PictureBox Image Location (if any).
    private string GetImageLocation()
    {
        // Set the default Image Location value (empty).
        // This is usefull to check wether the string is empty or not.
        // This can obviously be improved (I removed some unnecessary parts to suit this exmaple).
        string fullPath = string.Empty;

        // Make sure stored Image Location string is NOT Null or Empty.
        if (!string.IsNullOrEmpty(pictureBox.ImageLocation))
        {
            // Assign the Image Location to the local variable (to be returned).
            fullPath = pictureBox.ImageLocation;
        }

        return fullPath;
    }

在你写下这些之后；你明白了逻辑，它最终变得非常简单。

当ImageLocation不起作用时，如何在C＃中获取PictureBox的imageURL？

7 个答案: