public const int FileExpirationTime = 60; // minutes
public override string GetResourceUrl(ASPxWebControlBase control, byte[] content, string mimeType, string contentDisposition)
{
string fileExtension = "";
var a = control.NamingContainer.BindingContainer;
if (mimeType.StartsWith("image/"))
{
fileExtension = "." + mimeType.Substring("image/".Length);
}
string fileName = control.Attributes["data-key"] + fileExtension;
string physicalPath = HttpContext.Current.Server.MapPath(string.Format("~/{0}/", StaticCacheFolderName)) + fileName;
if (File.Exists(physicalPath) && DateTime.Now - File.GetCreationTime(physicalPath) > TimeSpan.FromMinutes(FileExpirationTime))
{
File.Delete(physicalPath);// an image is refreshed every hour
}
if (!File.Exists(physicalPath))
{
using (FileStream stream = new FileStream(physicalPath, FileMode.OpenOrCreate))
stream.Write(content, 0, content.Length);
}
return(String.Format("{0}/{1}", StaticCacheFolderName, fileName));
}
/* GetResourceKey
* 1) the mime type is saved as a file's extension for further
* use within the GetResourceData method.
* 2) received key is used to generate the image url for further
* use within the StoreResourceData, GetResourceData
*/
public override string GetResourceKey(ASPxWebControlBase control, byte[] content, string mimeType)
{
string fileExtension = "";
if (mimeType.StartsWith("image/"))
{
fileExtension = "." + mimeType.Substring("image/".Length);
}
return(Guid.NewGuid().ToString() + fileExtension);
}
public static void _ResetControlHierarchy(this ASPxWebControlBase source)
{
ASPxWebControlBaseMembersRepository.ResetControlHierarchy.Invoke(source);
}
public override void StoreResourceData(ASPxWebControlBase control, string key, BinaryStorageData data)
{
ClearFileCacheIfNeeded(GetFolderPath());
using (FileStream stream = new FileStream(GetFilePath(key), FileMode.OpenOrCreate))
stream.Write(data.Content, 0, data.Content.Length);
}
public override void StoreResourceData(ASPxWebControlBase control, string key, BinaryStorageData data)
{
HttpContext.Current.Cache.Add(key, data, null, Cache.NoAbsoluteExpiration,
TimeSpan.FromMinutes(1), CacheItemPriority.NotRemovable, null);
}
public override string GetResourceKey(ASPxWebControlBase control, byte[] content, string mimeType)
{
int pos = control.ID.LastIndexOf("_");
return control.ID.Substring(pos + 1);
}
public override bool CanStoreData(ASPxWebControlBase control)
{
return HttpContext.Current.Cache != null;
}
public override bool CanStoreData(ASPxWebControlBase control)
{
return(HttpContext.Current.Cache != null);
}
public override void StoreResourceData(ASPxWebControlBase control, string key, BinaryStorageData data)
{
HttpContext.Current.Cache.Add(key, data, null, Cache.NoAbsoluteExpiration,
TimeSpan.FromMinutes(1), CacheItemPriority.NotRemovable, null);
}
public override string GetResourceKey(ASPxWebControlBase control, byte[] content, string mimeType)
{
int pos = control.ID.LastIndexOf("_");
return(control.ID.Substring(pos + 1));
}
