/// <summary>
/// 將 PDF 加上 浮水印
/// </summary>
/// <param name="pdfStream"></param>
/// <param name="arg"></param>
/// <returns></returns>
public static MemoryStream AddWatermark(MemoryStream pdfStream, WatermarkArg arg)
{
var pdfDocument = new Aspose.Pdf.Document(pdfStream);
if (!string.IsNullOrWhiteSpace(arg.Watermark))
{
var text = new FormattedText(arg.Watermark);
foreach (var page in pdfDocument.Pages)
{
switch (arg.WMStyle)
{
case WatermarkStyle.FitPage:
AddWatermarkFitPage(page, arg);
break;
case WatermarkStyle.RepeatHorizontal:
AddWatermarkRepeatHorizontal(page, arg);
break;
default:
break;
}
}
}
var newPdfStream = new MemoryStream();
pdfDocument.Save(newPdfStream);
return(newPdfStream);
}
protected void btnFooter_Click(object sender, EventArgs e)
{
var excelArg = new ExportDataTable2ExcelArg
{
dataSource = GetDataSource(),
HeaderCenter = "&24 This is Report Header ...",
HeaderRight = $"&12 使用者:Rainmaker\r日期:{DateTime.Now.ToString("yyyy/MM/dd HH:mm:ss")}",
FooterRight = "&10 &P/&N",
ColumnInfos = new Dictionary <string, Tuple <string, double, Aspose.Cells.Style> >
{
{ "ProductID", new Tuple <string, double, Aspose.Cells.Style>($"產品代號", -1, null) },
{ "ProductName", new Tuple <string, double, Aspose.Cells.Style>("產品名稱", -1, null) },
{ "ProductDesc", new Tuple <string, double, Aspose.Cells.Style>("產品描述", -1, null) },
{ "Units", new Tuple <string, double, Aspose.Cells.Style>("產品 庫存", -1, null) },
{ "CreDte", new Tuple <string, double, Aspose.Cells.Style>("日期", 10, new Aspose.Cells.Style {
Number = 14
}) }
},
PageOrientation = PageOrientationType.Landscape,
IsTextWrapped = false,
PageScale = 80,
FontName = "標楷體",
HeaderHorizontalAlignment = TextAlignmentType.Center
};
var pdfStream = GenPDFFromDataTable(excelArg);
var fileNameWithoutExt = $"{Guid.NewGuid().ToString("N")}";
//string pdfFileName = Path.Combine(Server.MapPath("./data"), $"{fileNameWithoutExt}_temp.pdf");
//using (FileStream file = new FileStream(pdfFileName, FileMode.Create, System.IO.FileAccess.Write))
// pdfStream.CopyTo(file);
var watermarkArg = new WatermarkArg
{
Watermark = $"* 使用者:亂馬客 *{Environment.NewLine}{DateTime.Now.ToString("yyyy/MM/dd HH:mm:ss")}",
WMStyle = WatermarkStyle.RepeatHorizontal,
WatermarkHeight = 100,
WatermarkWidth = 130,
WatermarkHorizontalSpace = 50,
WatermarkVerticalSpace = 30,
RotateAngle = 30,
Opacity = .1
};
var waterStream = AddFooterAndWatermark(pdfStream, watermarkArg);
//string watermarkFileName = Path.Combine(Server.MapPath("./data"), $"{fileNameWithoutExt}.pdf");
//using (FileStream file = new FileStream(watermarkFileName, FileMode.Create, System.IO.FileAccess.Write))
// waterStream.CopyTo(file);
Response.ContentType = "application/pdf";
Response.AddHeader("content-disposition", "attachment; filename=" + $"{fileNameWithoutExt}.pdf");
var fileSize = waterStream.Length;
byte[] pdfBuffer = new byte[(int)fileSize];
waterStream.Read(pdfBuffer, 0, (int)fileSize);
waterStream.Close();
Response.BinaryWrite(pdfBuffer);
Response.End();
}
public static MemoryStream AddFooterAndWatermark(MemoryStream pdfStream, WatermarkArg arg)
{
var pdfDocument = new Aspose.Pdf.Document(pdfStream);
var pdfLastPage = pdfDocument.Pages[pdfDocument.Pages.Count];
var footer = new Aspose.Pdf.HeaderFooter();
//Instantiate a table object
Aspose.Pdf.Table tab1 = new Aspose.Pdf.Table();
tab1.HorizontalAlignment = HorizontalAlignment.Center;
//設定預設的文字格式
var defaultTextState = new TextState("MingLiU", 8);
footer.Paragraphs.Add(tab1);
tab1.DefaultColumnWidth = "180";
tab1.DefaultCellTextState = defaultTextState;
//Create rows in the table and then cells in the rows
var row1 = tab1.Rows.Add();
var cellL = row1.Cells.Add("信用資訊查詢主管");
//cellL.DefaultCellTextState = defaultTextState;
cellL.Alignment = HorizontalAlignment.Left;
var cellR = row1.Cells.Add("經辦");
cellR.Alignment = HorizontalAlignment.Right;
pdfLastPage.Footer = footer;
if (!string.IsNullOrWhiteSpace(arg.Watermark))
{
var text = new FormattedText(arg.Watermark);
foreach (var page in pdfDocument.Pages)
{
switch (arg.WMStyle)
{
case WatermarkStyle.FitPage:
AddWatermarkFitPage(page, arg);
break;
case WatermarkStyle.RepeatHorizontal:
AddWatermarkRepeatHorizontal(page, arg);
break;
default:
break;
}
}
}
var newPdfStream = new MemoryStream();
pdfDocument.Save(newPdfStream);
return(newPdfStream);
}
/// <summary>
/// 浮水印跟頁面一樣大
/// </summary>
/// <param name="pdfPage"></param>
/// <param name="arg"></param>
private static void AddWatermarkFitPage(Aspose.Pdf.Page pdfPage, WatermarkArg arg)
{
//var text = new FormattedText(arg.Watermark);
var defaultTextState = new TextState("MingLiU");
var stamp = new TextStamp(arg.Watermark, defaultTextState);
stamp.RotateAngle = arg.RotateAngle;
stamp.XIndent = arg.WatermarkHorizontalSpace;
stamp.YIndent = arg.WatermarkVerticalSpace;
stamp.Opacity = arg.Opacity;
stamp.Width = pdfPage.CropBox.Width;
stamp.Height = pdfPage.CropBox.Height;
pdfPage.AddStamp(stamp);
}
/// <summary>
/// 依 浮水印 水平地蓋滿整個頁面
/// </summary>
/// <param name="pdfPage"></param>
/// <param name="arg"></param>
private static void AddWatermarkRepeatHorizontal(Aspose.Pdf.Page pdfPage, WatermarkArg arg)
{
if (arg.WatermarkHeight < minValue)
{
throw new ArgumentException($"{nameof(arg.WatermarkHeight)} must greater than {minValue}");
}
if (arg.WatermarkWidth < minValue)
{
throw new ArgumentException($"{nameof(arg.WatermarkWidth)} must greater than {minValue}");
}
//var text = new FormattedText(arg.Watermark);
var yIndent = pdfPage.CropBox.Height - arg.WatermarkHeight;
var yLimit = 0 - (arg.WatermarkHeight + arg.WatermarkVerticalSpace);
var pageWidth = pdfPage.CropBox.Width;
var xIndent = 0d;
while (yIndent > yLimit)
{
while (xIndent < pageWidth)
{
var defaultTextState = new TextState("MingLiU");
var stamp = new TextStamp(arg.Watermark, defaultTextState);
stamp.RotateAngle = arg.RotateAngle;
stamp.XIndent = xIndent;
stamp.YIndent = yIndent;
stamp.Opacity = arg.Opacity;
stamp.Width = arg.WatermarkWidth;
stamp.Height = arg.WatermarkHeight;
pdfPage.AddStamp(stamp);
xIndent += (arg.WatermarkWidth + arg.WatermarkHorizontalSpace);
}
xIndent = 0;
var yIdentReduce = (arg.WatermarkHeight + arg.WatermarkVerticalSpace);
yIndent -= yIdentReduce;
}
}
/// <summary>
/// 以角度線性期function來呈現
/// </summary>
/// <param name="pdfPage"></param>
/// <param name="arg"></param>
private static void AddWatermarkRepeatRotateAngle(Aspose.Pdf.Page pdfPage, WatermarkArg arg)
{
if (arg.WatermarkHeight < minValue)
{
throw new ArgumentException($"{nameof(arg.WatermarkHeight)} must greater than {minValue}");
}
if (arg.WatermarkWidth < minValue)
{
throw new ArgumentException($"{nameof(arg.WatermarkWidth)} must greater than {minValue}");
}
var text = new FormattedText(arg.Watermark);
var yIndent = pdfPage.CropBox.Height - arg.WatermarkHeight;
var yLimit = 0 - (arg.WatermarkHeight + arg.WatermarkVerticalSpace);
var pageWidth = pdfPage.CropBox.Width;
var pageHeight = pdfPage.CropBox.Height;
var xIndent = 0d;
while (yIndent > yLimit)
{
var y = yIndent;
while (xIndent < pageWidth && y < pageHeight)
{
var stamp = new TextStamp(text);
stamp.RotateAngle = arg.RotateAngle;
stamp.XIndent = xIndent;
stamp.YIndent = y;
stamp.Opacity = arg.Opacity;
stamp.Width = arg.WatermarkWidth;
stamp.Height = arg.WatermarkHeight;
pdfPage.AddStamp(stamp);
xIndent += (arg.WatermarkWidth + arg.WatermarkHorizontalSpace);
xIndent = xIndent + Math.Cos(30) * arg.WatermarkWidth;
y = y + Math.Sign(30) * (arg.WatermarkHeight + arg.WatermarkVerticalSpace);
}
xIndent = 0;
var yIdentReduce = (arg.WatermarkHeight + arg.WatermarkVerticalSpace);
yIndent -= yIdentReduce;
}
//到底了，要再連走 X
var baseX = 0d;
while (baseX < pageWidth)
{
var y = yIndent;
xIndent = baseX;
while (xIndent < pageWidth)
{
var stamp = new TextStamp(text);
stamp.RotateAngle = arg.RotateAngle;
stamp.XIndent = xIndent;
stamp.YIndent = y;
stamp.Opacity = arg.Opacity;
stamp.Width = arg.WatermarkWidth;
stamp.Height = arg.WatermarkHeight;
pdfPage.AddStamp(stamp);
xIndent += (arg.WatermarkWidth + arg.WatermarkHorizontalSpace);
xIndent = xIndent + Math.Cos(30) * arg.WatermarkWidth;
y = y + Math.Sign(30) * (arg.WatermarkHeight + arg.WatermarkVerticalSpace);
}
baseX += (arg.WatermarkWidth + arg.WatermarkHorizontalSpace);;
}
}
