/// <summary>
/// Adds text watermark into source file, saves resulted file to out file.
/// </summary>
/// <param name="sourceFile">Source slides file to proceed.</param>
/// <param name="outFile">Output slides file.</param>
/// <param name="options">Watermark options.</param>
public void AddTextWatermark(
string sourceFile,
string outFile,
TextWatermarkOptionsModel options
)
{
using (var presentation = new Presentation(sourceFile))
{
var size = presentation.SlideSize.Size;
var height = size.Height;
var width = size.Width;
var centerW = (size.Width - width) / 2;
var centerH = (size.Height - height) / 2;
foreach (var slide in presentation.Slides)
{
var shape = slide.Shapes.AddAutoShape(
ShapeType.Rectangle,
centerW, centerH,
width, height
);
shape.Name = "WaterMark";
shape.FillFormat.FillType = FillType.NoFill;
shape.LineFormat.FillFormat.FillType = FillType.NoFill;
var textFrame = shape.AddTextFrame(" ");
textFrame.TextFrameFormat.AnchoringType = TextAnchorType.Center;
textFrame.TextFrameFormat.CenterText = NullableBool.True;
var paragraph = textFrame.Paragraphs[0];
paragraph.ParagraphFormat.Alignment = TextAlignment.Center;
var portion = paragraph.Portions[0];
var format = portion.PortionFormat;
format.FillFormat.FillType = FillType.Solid;
portion.Text = options.Text;
format.FillFormat.SolidFillColor.Color = options.ColorValue;
format.LatinFont = new FontData(options.FontName);
format.FontHeight = options.FontSize;
shape.Rotation = options.RotationAngleDegrees;
}
presentation.Save(outFile, GetFormatFromSource(sourceFile));
}
}
protected void ProcessTextWatermarkButton_Click(object sender, EventArgs e)
{
TextWatermarkOptionsModel textWatermarkOptionsModel = new TextWatermarkOptionsModel();
textWatermarkOptionsModel.id = FolderNameHidden.Value;
textWatermarkOptionsModel.FileName = FileNameHidden.Value;
textWatermarkOptionsModel.Text = textWatermark.Value;
textWatermarkOptionsModel.Color = pickcolor.Value;
textWatermarkOptionsModel.FontName = fontFamily.SelectedValue;
textWatermarkOptionsModel.FontSize = int.Parse(fontSize.Text);
textWatermarkOptionsModel.RotationAngleDegrees = int.Parse(textAngle.Text);
var response = asposeSlides.AddTextWatermark(textWatermarkOptionsModel);
SuccessLabel.InnerText = Resources["WatermarkAddedSuccessMessage"];
PerformResponse(response, TextMessage, ShowDownloadPage);
}
