当ImageLocation不工作时，如何在c#中获取PictureBox的imageURL

本文关键字：获取 PictureBox imageURL ImageLocation 工作 | 更新日期: 2023-09-27 18:06:10

当ImageLocation不工作时，如何在windows窗体中获取图片框的图像URL ?

string filepath = picturebox.ImageLocation; // Returns null

当ImageLocation不工作时，如何在c#中获取PictureBox的imageURL

如果您使用picturebox的ImageLocation属性来加载图像，那么您就得到了您想要的。否则，如果你通过图像属性加载它，那么你就不会从ImageLocation中获取，也不会从Image中获取。

你可以通过

string filepath = PictureBox.ImageLocation;

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

ImageLocation

PictureBox.ImageLocation

也许这篇文章能帮到你http://blogs.msdn.com/b/marcelolr/archive/2007/06/15/data-binding-a-winforms-picturebox-to-a-file-path-or-url.aspx

欢呼

听起来你需要:

Picturebox.ImageLocation

我终于找到了解决办法。当我们选择图像时，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;

并在需要时检索:

string Path = pictureBox2.Tag + string.Empty;

请记住，您必须将Tag属性设置为null。

将图像分配给PictureBox有一定的正确方法。我相信您会理解使用PictureBox背后的原因和逻辑。ImageLocation

当你得到一个Image.FromFile;您将被要求指定一个字符串，包含所选图像的文件:目录，文件名和扩展名。因此，一旦你选择/加载要加载的图像(假设你将使用OpenFileDialog);您必须将文件的完整路径设置为PictureBox。ImageLocation属性放在首位(这样您就可以在需要时检索它);只有这样(最好)你才能将图像加载到你的PictureBox中。


参见下面的例子:

   // 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;
    }

如果你需要获取图片盒图像位置:

    // 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;
    }

当你把这些写下来之后，你就明白了其中的逻辑，并且它最终变得非常简单。

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