private void ClearWWWRootTempFolder()
{
DirectoryInfo di = new DirectoryInfo(RootDirectoryTools.GetWWWRootTempFolderPhysicalPath());
foreach (FileInfo file in di.GetFiles())
{
file.Delete();
}
foreach (DirectoryInfo dir in di.GetDirectories())
{
dir.Delete(true);
}
}
private string GenerateTempImageAndTempPath(string imagePath)
{
// If the camera has a value in the image_path column of the Camera table in the database, if not a question mark will be displayed instead.
if (String.IsNullOrWhiteSpace(imagePath) == false)
{
// Ensure the image file still exists on the server, if not a question mark will be displayed instead.
if (File.Exists(imagePath))
{
/*
* NOTE: To create/delete/overwrite file in the wwwroot directory, physical file paths must be used
* and not virual paths (using ~). Use RootDirectoryTools.cs in HelperServices.
*/
// 1. Extract the FileName from the path stored in the database.
string fileName = Path.GetFileName(imagePath);
// 2. Create the full file output path (physical).
string tempPath = Path.Combine(RootDirectoryTools.GetWWWRootPhysicalPath(), fileName);
// 3. Delete any previous file in the temp folder associated to the camera.
if (File.Exists(tempPath))
{
File.Delete(tempPath);
}
// 4. Copy the image from the path in the "...\BackEnd\BackEndServer\ImageStorage\CameraImages" to the phycal wwwroot path's "\temp" folder.
File.Copy
(
// Source Image Path (stored in the ImageStorage\CameraImages folder in the project.)
imagePath,
// Write to the wwwroot directory's temp path (physical), output filename remains the same.
Path.Combine(RootDirectoryTools.GetWWWRootTempFolderPhysicalPath(), fileName),
// If file was not deleted properly, ensure the existing file is overwritten.
true
);
// 5. Set the View Model object's "TempImagePath" attribute to the appropriate
// value for use in the img element's src attribute to locate the image in the wwwroot.
return(String.Concat(RootDirectoryTools.GetWWWRootTempFolderVirtualPathForHTML(), "/", fileName));
}
}
return(null);
}
