急！！！大神帮帮忙！！asp.netWord加水印用Spire.Doc后代码报错

Question

PictureWatermark picture = new PictureWatermark();
picture.Picture = System.Drawing.Image.FromFile(Server.MapPath("/skin/images/water.png"));这句代码里面报错了，附上图片

下面是我的程序：
string setimg = Server.MapPath("/skin/images/water.png");
Response.Write(setimg);
Document document = new Document();
document.LoadFromFile(Server.MapPath("/UploadFile/DescriptionWE/" + setname));
//新建一个图片水印对象并添加为待设置水印的图片
PictureWatermark picture = new PictureWatermark();
picture.Picture = System.Drawing.Image.FromFile("F://0808/SDWeb/SDWeb/skin/images/water.png ");
//根据需要设置图片的大小，将其设置为文档的水印
picture.Scaling = 90;
document.Watermark = picture;
//保存文档
document.SaveToFile(Server.MapPath("~/UploadFile/DescriptionWE/") + PFDname, FileFormat.Docx2010);

Answer 1

 picture.Picture = System.Drawing.Image.FromFile("F://0808/SDWeb/SDWeb/skin/images/water.png ");
这个执行以后，picture.Picture是null么？

你的路径写成
picture.Picture = System.Drawing.Image.FromFile("F:\\0808\\SDWeb\\SDWeb\\skin\\images\\water.png");
看看，注意一个是分割符，一个是png后面不要空格。