protected string GetValueText()
{
var dalc = WebManager.GetService <IDalc>(DalcServiceName);
var relexParser = new RelExQueryParser(false);
var exprResolver = WebManager.GetService <NI.Common.Expressions.IExpressionResolver>("defaultExprResolver");
var qContext = new Hashtable();
if (DataContext is IDictionary)
{
qContext = new Hashtable((IDictionary)DataContext);
}
qContext["q"] = String.Empty;
Query q = (Query)relexParser.Parse(Convert.ToString(exprResolver.Evaluate(qContext, GetRelex())));
q.Root = new QueryConditionNode((QField)ValueFieldName, Conditions.Equal, (QConst)Value); //& q.Root;
var data = new Hashtable();
if (dalc.LoadRecord(data, q))
{
var text = Convert.ToString(data[TextFieldName]);
return(LocalizationEnabled?WebManager.GetLabel(text, this):text);
}
else
{
Value = null;
return("");
}
}
public static void CropImage(Stream input, Stream output, float relStartX, float relStartY, float relEndX, float relEndY, ImageFormat saveAsFormat)
{
Image img = null;
try {
img = Image.FromStream(input);
} catch (Exception ex) {
throw new Exception(WebManager.GetLabel("Invalid image format"));
}
var absStartX = (int)(relStartX * img.Size.Width);
var absStartY = (int)(relStartY * img.Size.Height);
var absEndX = (int)(relEndX * img.Size.Width);
var absEndY = (int)(relEndY * img.Size.Height);
var resizedBitmap = new Bitmap(absEndX - absStartX, absEndY - absStartY);
using (Graphics g = Graphics.FromImage(resizedBitmap)) {
g.DrawImage(img, new Rectangle(0, 0, resizedBitmap.Width, resizedBitmap.Height),
new Rectangle(absStartX, absStartY, resizedBitmap.Width, resizedBitmap.Height),
GraphicsUnit.Pixel);
}
resizedBitmap.Save(output, saveAsFormat ?? ImageFormat.Png);
}
public static IFileObject SaveAndResizeImage(Stream input, IFileSystem fs, IFileObject file, int maxWidth, int maxHeight, ImageFormat saveAsFormat)
{
Image img;
MemoryStream imgSrcStream = new MemoryStream();
byte[] buf = new byte[1024 * 50];
int bufRead = 0;
do
{
bufRead = input.Read(buf, 0, buf.Length);
if (bufRead > 0)
{
imgSrcStream.Write(buf, 0, bufRead);
}
} while (bufRead > 0);
imgSrcStream.Position = 0;
try {
img = Image.FromStream(imgSrcStream);
} catch (Exception ex) {
throw new Exception(WebManager.GetLabel("Invalid image format"));
}
if (img.Size.Width == 0 || img.Size.Height == 0)
{
throw new Exception(WebManager.GetLabel("Invalid image size"));
}
var sizeIsWidthOk = (maxWidth <= 0 || img.Size.Width <= maxWidth);
var sizeIsHeightOk = (maxHeight <= 0 || img.Size.Height <= maxHeight);
var sizeIsOk = sizeIsWidthOk && sizeIsHeightOk;
var originalImgFmt = ResolveImageFormat(Path.GetExtension(file.Name)) ?? ImageFormat.Bmp;
var formatIsOk = (saveAsFormat == null && !originalImgFmt.Equals(ImageFormat.Bmp) && !originalImgFmt.Equals(ImageFormat.Tiff)) || originalImgFmt.Equals(saveAsFormat);
if (!formatIsOk || !sizeIsOk)
{
var saveAsFormatResolved = saveAsFormat != null ? saveAsFormat : (originalImgFmt == ImageFormat.Jpeg?ImageFormat.Jpeg:ImageFormat.Png);
var newFmtExtension = GetImageFormatExtension(saveAsFormatResolved);
var newFile = fs.ResolveFile(file.Name + (Path.GetExtension(file.Name).ToLower() == newFmtExtension ? String.Empty : newFmtExtension));
newFile.CreateFile();
if (!sizeIsOk)
{
var newWidth = img.Size.Width;
var newHeight = img.Size.Height;
if (!sizeIsWidthOk)
{
newWidth = maxWidth;
newHeight = (int)Math.Floor(((double)img.Size.Height) * (((double)maxWidth) / ((double)img.Size.Width)));
if (maxHeight < 0 || newHeight <= maxHeight)
{
sizeIsHeightOk = true;
}
}
if (!sizeIsHeightOk)
{
newHeight = maxHeight;
newWidth = (int)Math.Floor(((double)img.Size.Width) * (((double)maxHeight) / ((double)img.Size.Height)));
}
var resizedBitmap = new Bitmap(img, newWidth, newHeight);
var imageProps = img.PropertyItems;
foreach (PropertyItem propItem in imageProps)
{
resizedBitmap.SetPropertyItem(propItem);
}
SaveImage(resizedBitmap, newFile.GetContent().OutputStream, saveAsFormatResolved);
}
else
{
SaveImage(img, newFile.GetContent().OutputStream, saveAsFormatResolved);
}
newFile.Close();
return(newFile);
}
file.CreateFile();
imgSrcStream.Position = 0;
file.CopyFrom(imgSrcStream);
file.Close();
return(file);
}
/// <summary>
/// Resolves label for context control.
/// </summary>
public static string GetLabel(this Control ctrl, string label)
{
return(WebManager.GetLabel(label, ctrl));
}