目录
实现效果
范例运行环境
Office DCOM 配置
设计实现
创建stamp图章类
电子章图片的计算与定位
旋转图片方法
总结
实现效果
在OA的自动化处理系统中，通过审批的最终节点，可能会对WORD文件加盖电子章，比如定位带有指定文字的Range周围加盖电子章，骑缝章，甚至水印图片。比如如下效果图：
范例运行环境
操作系统： Windows Server 2019 DataCenter
操作系统上安装 Office Word 2016 ，客户端使用的 Office Word 2019
.net版本： .netFramework4.7.1 或以上
开发工具：VS2019 C#
Office DCOM 配置
请参考我的文章《C# 读取Word表格到DataSet》有对Office DCOM详细配置介绍，这里不再赘述。
设计实现
创建stamp图章类
导出WORD文件可以传入多个图章类（如果需要的话），图章类主要包括实现如下设置：
1、可设置三种图片（标准的盖章图片、骑缝章图片、水印图片）
2、标准的盖章图片是否显示，不显示则可以只显示骑缝章或水印图片，这个可以模拟多次盖骑缝章的效果
3、定位盖章文字，可以设置一下 x、y的偏移量，以校准指定的模板文件，达到最佳重叠效果。
4、可设置各种章的翻转角度（可随机选取）
示例代码如下：
public class stamp
{
public string stampImageFilename = ""; //盖章图片
public string stampImageFilename2 = ""; //骑缝章图片
public string stampImageFilename3 = ""; //水印章图片
public bool stampImageVisible = true; //主章是否可显示
public string findWord = ""; //查找盖章定位文字
public int findWordOffsetX = 0; //查找盖章文字后，章的定位偏移量
public int findWordOffsetY = 0; //查找盖章文字后，章的定位偏移量
public int stamp2X = 0; //骑缝章偏移量
public int stamp2Y = 0; //骑缝章偏移量
public int roteAngle = 0; //骑缝章翻转角度，12点方向为0度，顺时针计算角度
public bool roteReFix = false; //骑缝章翻转角度重新计算适应图片（多见于对角线）
public bool randomRoteAngle = false; //骑缝章是否按指定角度的最大随机值提取
public int stampImageWidth = 0; //章宽度
public int stampImageHeight = 0; //章高度
public string stamp2Direction = "right"; //骑缝章盖章方向 默认right ，包括 left/top/bottom
public int stampAngle = 0; //骑缝章翻转角度，12点方向为0度，顺时针计算角度
public bool randomStampAngle = false; //骑缝章是否按指定角度的最大随机值提取
public int stamp3X = 0; //水印章每页X
public int stamp3Y = 0; //水印章每页Y
public int stamp3Angle = 0; //水印章翻转角度，12点方向为0度，顺时针计算角度
}电子章图片的计算与定位
可以创建多个图章类添加 ArrayList 中进行方法传递， 初始值为public ArrayList Stamps = null;
创建方法 public string setWordStamps(string _filename,ArrayList Stamps)
实现的功能大致如下：
1、主章根据提供查找的关键字，如 “盖章处：”、“盖章：”，然后添加图片重叠在文字的上方周围
2、骑缝章根据页数进行分割计算，每页分隔宽度不小于 1 像素
3、骑缝章可选择“盖”在页面的上下左右位置，如果多个位置方向都需要“盖”，则传递多个 stamp 图章类
4、章可以随机和指定旋转角度
示例代码如下：
public string setWordStamps(string _filename,ArrayList Stamps){
Object Nothing =System.Reflection.Missing.Value;
string _file="",_path=Path.GetDirectoryName(_filename)+"\\tempbfile\\",_ext="";
_file=Path.GetFileNameWithoutExtension(_filename);
_ext=Path.GetExtension(_filename);
string _validfilename=Guid.NewGuid().ToString()+_ext;
string _lastfile=_path+_validfilename;
string _pdfFile = _path + Guid.NewGuid().ToString() + ".pdf";
System.IO.File.Copy(_filename,_lastfile,true);
if(!File.Exists(_lastfile))
{
return "";
}
//取得Word文件保存路径
object filename=_lastfile;
//创建一个名为WordApp的组件对象
Word.Application WordApp=new Word.Application();
//创建一个名为WordDoc的文档对象
WordApp.DisplayAlerts=Word.WdAlertLevel.wdAlertsNone;
Word.Document WordDoc=WordApp.Documents.Open(ref filename,ref Nothing,ref Nothing,ref Nothing,ref Nothing,ref Nothing,ref Nothing,ref Nothing,ref Nothing,ref Nothing,ref Nothing,ref Nothing,ref Nothing,ref Nothing,ref Nothing,ref Nothing);
WordDoc.SpellingChecked = false;
WordDoc.ShowSpellingErrors = false;
WordDoc.ActiveWindow.View.Type = Word.WdViewType.wdNormalView;
//遍历stamp图章类
foreach (stamp Stamp in Stamps)
{
bool isfirst = true;
int iii = 0;
int selectStart = 0;
ArrayList restoreRange = new ArrayList();
while (true)
{
iii++;
bool findstamptext = false;
if (Stamp.findWord != "")
{
WordApp.Selection.Range.Start = selectStart;
Word.Find fnd = WordApp.Selection.Find;
Object findText = Stamp.findWord;
Object matchCase = false;
Object matchWholeWord = Type.Missing;
Object matchWildcards = false;
Object matchSoundsLike = false;
Object matchAllWordForms = false;
Object forward = true;
Object wrap = Word.WdFindWrap.wdFindContinue;
Object format = false;
Object replaceWith = "";
Object replace = Type.Missing; ;
Object matchKashida = Type.Missing;
Object matchDiacritics = Type.Missing;
Object matchAlefHamza = Type.Missing;
Object matchControl = Type.Missing;
if (fnd.Execute(ref findText, ref matchCase, ref matchWholeWord, ref matchWildcards, ref matchSoundsLike, ref matchAllWordForms,
ref forward, ref wrap, ref format, ref replaceWith, ref replace, ref matchKashida, ref matchDiacritics, ref matchAlefHamza, ref matchControl))
{
selectStart = WordApp.Selection.Range.Start;
restoreRange.Add(WordApp.Selection.Range);
findstamptext = true;
}
else
{
findstamptext = false;
}
}
if (findstamptext == false)
{
break;
}
Word.InlineShape pic = WordApp.Selection.Range.InlineShapes.AddPicture(Stamp.stampImageFilename, false, true);
Word.Shape picshape = pic.ConvertToShape();
picshape.WrapFormat.Type = Word.WdWrapType.wdWrapNone;
if (Stamp.stampImageWidth != 0)
{
picshape.Width = Stamp.stampImageWidth;
}
if (Stamp.stampImageHeight != 0)
{
picshape.Height = Stamp.stampImageHeight;
}
float pagewidth = 0;
float pageheight = 0;
if (findstamptext == true)
{
if (Stamp.stampAngle > 0)
{
Random rnd = new Random();
picshape.Rotation = Stamp.randomStampAngle == false ? Stamp.stampAngle : rnd.Next(Stamp.stampAngle);
}
pagewidth = WordApp.Selection.PageSetup.PageWidth;
pageheight = WordApp.Selection.PageSetup.PageHeight;
int ox = 0; int oy = 0; int ow = 0; int oh = 0;
WordApp.Windows[1].GetPoint(out ox, out oy, out ow, out oh, WordApp.Selection.Range);
WordApp.Selection.Range.Text = "";
picshape.RelativeHorizontalPosition = Word.WdRelativeHorizontalPosition.wdRelativeHorizontalPositionPage;
picshape.RelativeVerticalPosition = Word.WdRelativeVerticalPosition.wdRelativeVerticalPositionPage;
picshape.Left = (float)(ox * 0.405402299) - (picshape.Width / 2);
picshape.Top = WordApp.Selection.Range.Information[Word.WdInformation.wdVerticalPositionRelativeToPage] - (picshape.Height / 2);
if ((bool)WordApp.Selection.Range.Information[Word.WdInformation.wdWithInTable] == true)
{
picshape.RelativeHorizontalPosition = Word.WdRelativeHorizontalPosition.wdRelativeHorizontalPositionCharacter;
picshape.RelativeVerticalPosition = Word.WdRelativeVerticalPosition.wdRelativeVerticalPositionLine;
picshape.Left = 0;
picshape.Top = 0;
}
}
picshape.Left = picshape.Left + Stamp.findWordOffsetX;
picshape.Top = picshape.Top + Stamp.findWordOffsetY;
if (Stamp.stampImageVisible == false)
{
picshape.Visible = Microsoft.Office.Core.MsoTriState.msoFalse;
}
if (Stamp.stampImageFilename2 != ""&&isfirst==true)
{
int ra = Stamp.roteAngle;
if (ra > 0)
{
Random rnd = new Random();
ra = Stamp.randomRoteAngle == false ? ra : rnd.Next(ra);
}
Bitmap cc = (Bitmap)Image.FromFile(Stamp.stampImageFilename2);
Bitmap bb = Rotate(cc, -ra, Stamp.roteReFix);
WordDoc.Windows[1].Panes[1].Pages;
int pages2 = WordDoc.ComputeStatistics(Word.WdStatistic.wdStatisticPages, ref Nothing);
if (pages2 == 1)
{
pages2 = 0; //如果一页就不盖骑缝章
}
for (int pi = 1; pi <= pages2; pi++)
{
Word.Range pagerange = WordDoc.GoTo(Word.WdGoToItem.wdGoToPage, Word.WdGoToDirection.wdGoToAbsolute, pi.ToString());
int rx = (pi - 1) * bb.Width / pages2;
int ry = 0;
int rw = bb.Width / pages2;
int rh = bb.Height;
if (Stamp.stamp2Direction == "bottom")
{
rx = 0;
ry = (pi - 1) * bb.Height / pages2;
rw = bb.Width;
rh = bb.Height / pages2;
}
else if (Stamp.stamp2Direction == "left")
{
rx = (pages2 - pi) * bb.Width / pages2;
ry = 0;
rw = bb.Width / pages2;
rh = bb.Height;
}
else if (Stamp.stamp2Direction == "top")
{
rx = 0;
ry = (pages2 - pi) * bb.Height / pages2;
rw = bb.Width;
rh = bb.Height / pages2;
}
if (rw < 1 || rh < 1)
{
continue;
}
Bitmap sepbitmap1 = bb.Clone(new System.Drawing.Rectangle(rx, ry, rw, rh), System.Drawing.Imaging.PixelFormat.Format32bppPArgb);
string temppng = "d:\\" + System.Guid.NewGuid().ToString() + ".png";
sepbitmap1.Save(temppng);
Word.InlineShape pic2 = pagerange.InlineShapes.AddPicture(temppng, false, true);
Word.Shape picshape2 = pic2.ConvertToShape();
picshape2.WrapFormat.Type = Word.WdWrapType.wdWrapNone;
picshape2.Width = picshape.Width / pages2;
picshape2.Height = picshape.Height;
if (Stamp.stamp2Direction == "bottom" || Stamp.stamp2Direction == "top")
{
picshape2.Width = picshape.Width;
picshape2.Height = picshape.Height / pages2;
}
picshape2.RelativeHorizontalPosition = Word.WdRelativeHorizontalPosition.wdRelativeHorizontalPositionPage;
picshape2.RelativeVerticalPosition = Word.WdRelativeVerticalPosition.wdRelativeVerticalPositionPage;
picshape2.Left = pagewidth - picshape2.Width;
picshape2.Top = Stamp.stamp2Y;
if (Stamp.stamp2Direction == "bottom")
{
picshape2.Left = Stamp.stamp2X;
picshape2.Top = pageheight - picshape2.Height;
}
else if (Stamp.stamp2Direction == "left")
{
picshape2.Left = 0;
picshape2.Top = Stamp.stamp2Y;
}
else if (Stamp.stamp2Direction == "top")
{
picshape2.Left = Stamp.stamp2X;
picshape2.Top = 0;
}
resultReport += string.Format("stamp2 {2} left: {0} top:{1} width:{3} height:{4}<br>", picshape2.Left, picshape2.Top,pi,picshape2.Width,picshape2.Height);
File.Delete(temppng);
}
}//stamp2
if (Stamp.stampImageFilename3 != ""&&isfirst==true)
{
int ra = Stamp.stamp3Angle;
if (ra > 0)
{
Random rnd = new Random();
ra = Stamp.randomRoteAngle == false ? ra : rnd.Next(ra);
}
Bitmap cc = (Bitmap)Image.FromFile(Stamp.stampImageFilename3);
Bitmap bb = Rotate(cc, -ra, true);
int pages2 = WordDoc.ComputeStatistics(Word.WdStatistic.wdStatisticPages, ref Nothing);
resultReport += string.Format(" PageCount3:{0}<br>", pages2);
for (int pi = 1; pi <= pages2; pi++)
{
Word.Range pagerange = WordDoc.GoTo(Word.WdGoToItem.wdGoToPage, Word.WdGoToDirection.wdGoToAbsolute, pi.ToString());
int rx = (pi - 1) * bb.Width / pages2;
rx = 0;
int ry = 0;
int rw = bb.Width;
int rh = bb.Height;
Bitmap sepbitmap1 = bb.Clone(new System.Drawing.Rectangle(rx, ry, rw, rh), System.Drawing.Imaging.PixelFormat.Format32bppPArgb);
string temppng = "d:\\" + System.Guid.NewGuid().ToString() + ".png";
Word.InlineShape pic2 = pagerange.InlineShapes.AddPicture(temppng, false, true);
Word.Shape picshape2 = pic2.ConvertToShape();
picshape2.WrapFormat.Type = Word.WdWrapType.wdWrapNone;
picshape2.Width = picshape.Width;
picshape2.Height = picshape.Height;
picshape2.RelativeHorizontalPosition = Word.WdRelativeHorizontalPosition.wdRelativeHorizontalPositionPage;
picshape2.RelativeVerticalPosition = Word.WdRelativeVerticalPosition.wdRelativeVerticalPositionPage;
picshape2.Left = Stamp.stamp3X;
// picshape2.Left = Stamp.stamp2X;
picshape2.Top = Stamp.stamp2Y;
File.Delete(temppng);
}
}//stamp3
isfirst = false;
}// while
foreach (Word.Range range in restoreRange)
{
range.Text = Stamp.findWord;
}
}//foreach
WordDoc.Save();
WordDoc.Close(ref Nothing, ref Nothing, ref Nothing);
//关闭WordApp组件对象
WordApp.Quit(ref Nothing, ref Nothing, ref Nothing);
return _lastfile;
}旋转图片方法
public Bitmap Rotate(Bitmap b, int angle,bool fix=false)
{
angle = angle % 360;
//弧度转换
double radian = angle * Math.PI / 180.0;
double cos = Math.Cos(radian);
double sin = Math.Sin(radian);
//原图的宽和高
int w = b.Width;
int h = b.Height;
int ow = w;
int oh = h;
int d = ((int)Math.Sqrt(Math.Pow(w - 0, 2) + Math.Pow(h- 0, 2))+1);
if (fix == true)
{
w = d;
h = d;
}
int W = (int)(Math.Max(Math.Abs(w * cos - h * sin), Math.Abs(w * cos + h * sin)));
int H = (int)(Math.Max(Math.Abs(w * sin - h * cos), Math.Abs(w * sin + h * cos)));
//目标位图
Bitmap dsImage = new Bitmap(w, h);
System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(dsImage);
g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.Bilinear;
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
//计算偏移量
System.Drawing.Point Offset = new System.Drawing.Point((W - w) / 2, (H - h) / 2);
//构造图像显示区域：让图像的中心与窗口的中心点一致
System.Drawing.Rectangle rect = new System.Drawing.Rectangle(fix==false?0:(d-ow)/2, fix == false ? 0 : (d-oh)/2, ow, oh);
// System.Drawing.Rectangle rect = new System.Drawing.Rectangle(Offset.X, Offset.Y, w, h);
// System.Drawing.Point center = new System.Drawing.Point(rect.X + rect.Width / 2, rect.Y + rect.Height / 2);
System.Drawing.Point center = new System.Drawing.Point(rect.X + rect.Width / 2, rect.Y + rect.Height / 2);
g.TranslateTransform(center.X, center.Y);
g.RotateTransform(360 - angle);
//恢复图像在水平和垂直方向的平移
g.TranslateTransform(-center.X, -center.Y);
g.DrawImage(b, rect);
//重至绘图的所有变换
g.ResetTransform();
g.Save();
g.Dispose();
//dsImage.Save("yuancd.jpg", System.Drawing.Imaging.ImageFormat.Jpeg);
return dsImage;
}总结
以上是实现设计的一些参考代码，在实际的使用中，可能还会遇到如下问题：
1、定位关键字的叠加效果不好，因此针对每一个模板文件均需要调整图片的x、y偏移量，以达到最佳效果
2、对于超多页面的文件(如几万页)，骑缝的效果可能不佳，可以采取调整图片像素宽度，或拆分模板文件进行处理
示例代码仅作参考，欢迎大家评论指教！
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