public override void PerformLayout()
{
base.PerformLayout();
Action <object, string, string> fileOpenAction = (jsBlob, textContent, dataUrl) =>
{
var eventArgs = new FileUploadEventArgs(jsBlob, textContent, dataUrl);
FileOpened?.Invoke(this, eventArgs);
Command?.Execute(new ICommandParameter(eventArgs));
};
Action <object> changeAction = evt =>
{
var input = Verbatim.Expression("evt.target");
var file = Verbatim.Expression("$0.files[0]", input);
FileName = (string)Verbatim.Expression("$0.name", file);
var reader = Verbatim.Expression("new FileReader()");
Action onLoadAction = () =>
{
var jsBlob = Verbatim.Expression("$0.result", reader);
//string fileMimeType = (string)Verbatim.Expression("$0.type", file);
string textContent = null;
string dataUrl = null;
switch (UploadType)
{
case FileUploadType.TextFile:
switch (FileEncoding)
{
case FileReaderEncoding.ASCII:
textContent = jsBlob as string;
break;
case FileReaderEncoding.UTF8:
textContent = BufferConverter.ArrayBufferToStringUTF8(jsBlob);
break;
case FileReaderEncoding.UTF16:
textContent = BufferConverter.ArrayBufferToStringUTF16(jsBlob);
break;
}
break;
case FileUploadType.ImageFile:
dataUrl = jsBlob as string;
break;
}
fileOpenAction(jsBlob, textContent, dataUrl);
};
Verbatim.Expression("$0.onload = $1", reader, onLoadAction);
switch (UploadType)
{
case FileUploadType.TextFile:
case FileUploadType.BinaryFile:
if (FileEncoding == FileReaderEncoding.ASCII)
{
Verbatim.Expression("$0.readAsText($1);", reader, file);
}
else
{
Verbatim.Expression("$0.readAsArrayBuffer($1);", reader, file);
}
break;
case FileUploadType.ImageFile:
Verbatim.Expression("$0.readAsDataURL($1);", reader, file);
break;
}
};
InternalJQElement.BindEventListener("change", changeAction);
}
