我正在使用abcPdf将HTML报告转换为pdf文件. pdf必须是单个横向A4页面.
你知道是否有办法告诉abcPdf扩展HTML页面以适应pdf中的单个页面？我尝试使用Magnify() method,它会缩放内容,但仍会将其分成页面,即使它适合一页.我一直在摸不着头脑,我想知道是否有人这样做了.
这是我目前正在使用的代码：
public byte[] UrlToPdf(string url,PageOrientation po)
{
using (Doc theDoc = new Doc())
{
// When in landscape mode:
// We use two transforms to apply a generic 90 degree rotation around
// the center of the document and rotate the drawing rectangle by the same amount.
if (po == PageOrientation.Landscape)
{
// apply a rotation transform
double w = theDoc.MediaBox.Width;
double h = theDoc.MediaBox.Height;
double l = theDoc.MediaBox.Left;
double b = theDoc.MediaBox.Bottom;
theDoc.Transform.Rotate(90,l,b);
theDoc.Transform.Translate(w,0);
// rotate our rectangle
theDoc.Rect.Width = h;
theDoc.Rect.Height = w;
// To change the default orientation of the document we need to apply a rotation to the root page object.
//By doing this we ensure that every page in the document is viewed rotated.
int theDocID = Convert.ToInt32(theDoc.GetInfo(theDoc.Root,"Pages"));
theDoc.SetInfo(theDocID,"/Rotate","90");
}
theDoc.HtmlOptions.PageCacheEnabled = false;
theDoc.HtmlOptions.AddForms = false;
theDoc.HtmlOptions.AddLinks = false;
theDoc.HtmlOptions.AddMovies = false;
theDoc.HtmlOptions.FontEmbed = false;
theDoc.HtmlOptions.UseResync = false;
theDoc.HtmlOptions.UseVideo = false;
theDoc.HtmlOptions.UseScript = false;
theDoc.HtmlOptions.HideBackground = false;
theDoc.HtmlOptions.Timeout = 60000;
theDoc.HtmlOptions.BrowserWidth = 0;
theDoc.HtmlOptions.ImageQuality = 101;
// Add url to document.
int theID = theDoc.AddImageUrl(url,true,true);
while (true)
{
if (!theDoc.Chainable(theID))
break;
theDoc.Page = theDoc.AddPage();
theID = theDoc.AddImagetochain(theID);
}
//Flattening the pages (Whatever that means)
for (int i = 1; i <= theDoc.PageCount; i++)
{
theDoc.PageNumber = i;
theDoc.Flatten();
}
return theDoc.GetData();
}
}
解决方法
所以这就是我解决这个问题的方法.
首先,我需要将HTML页面的高度传递给pdf生成方法,所以我在页面上添加了这个pdf-ed：
<asp:HiddenField ID="hfHeight" runat="server" />
并在后面的代码中：
protected void Page_Init(object sender,EventArgs e)
{
if (!IsPostBack)
{
string scriptKey = "WidhtHeightForPdf";
if (!Page.ClientScript.IsClientScriptBlockRegistered(scriptKey))
{
StringBuilder sb = new StringBuilder();
sb.AppendLine("<script>")
.AppendLine("document.getElementById('" + hfHeight.ClientID + "').value = document.body.clientHeight;")
.AppendLine("</script>");
Page.ClientScript.RegisterStartupScript(typeof(Page),scriptKey,sb.ToString());
}
}
}
现在,当我调用pdf生成方法时,我可以将它传递给HTML的高度.一旦我达到高度,就可以计算pdf“viewport”的宽度,使得高度适合pdf页面：
int intHTMLWidth = height.Value * Convert.ToInt32(theDoc.Rect.Width / theDoc.Rect.Height);
然后通过theDoc的HtmlOptions指定BrowserWidth参数：
theDoc.HtmlOptions.BrowserWidth = intHTMLWidth;
或者将URL添加到theDoc时：
int theID = theDoc.AddImageUrl(url,intHTMLWidth,true);
编辑：这解决了这个问题,所以我打算将它标记为答案.现在接下来要做的是根据HTML的宽度和高度在protrait或横向模式下创建pdf,以便在pdf页面上使用最大空间.
