Fusion图表如何更新导出（服务器端） [英] Fusion Charts how to update exporting (Server Side)
问题描述
我正在使用FuscionChart FCExporter类将图表导出到Pdf，PNG等。我面临的问题是我希望图表后面的页面显示数据中的网格视图打印。
实现此目的有几个选项：
1.创建图表PDF然后gridview PDF并合并两个文件
-Problem：我不知道从哪里开始。我不确定在课堂上哪个地方打电话
另一个文件并合并。
2.更新例程以允许GridView成为将图表元素添加到
docuement后添加。
问题：我最接近它的工作是在文档中打印第二页但网格视图永远不会显示，我不确定为什么。
代码用于向PDF添加元素：
private byte [ ] getPDFObjects（bool isCompressed）
{
MemoryStream PDFBytes = new MemoryStream（）;
//存储此临时字符串中的所有PDF对象都要写入ByteArray
string strTmpObj =;
// start xref数组
ArrayList xRefList = new ArrayList（）;
xRefList.Add（xref\\\
0）;
xRefList .Add（0000000000 65535 f \ n）; //地址refenrece到obj 0
//按顺序构建PDF对象
//版本和标题
strTmpObj =％PDF-1.3 \ n％{FC} \ n;
PDFBytes.Write（stringToBytes（strTmpObj），0，strTmpObj.Length）;
// OBJECT 1：info（可选）
strTmpObj =1 0 obj<< \\\
/ Author（FusionCharts）\ n / Title（FusionCharts） ）\ n / Creator（FusionCharts）\ n>> \ nendobj \ n;
xRefList.Add（calculateXPos（（int）PDFBytes.Length））; // refenrece to obj 1
PDFBytes.Write（stringToBytes（strTmpObj），0，strTmpObj.Length）;
// OBJECT 2 ：从页面目录开始
strTmpObj =2 0 obj \ n<< / Type / Catalog / Pages 3 0 R>> \ nendobj \ n;
xRefList.Add（calculateXPos（（int）PDFBytes.Length））; // refenrece to obj 2
PDFBytes.Write（stringToBytes（strTmpObj），0，strTmpObj.Length）;
// OBJECT 3 ：页面树（对目录页面的引用）
strTmpObj =3 0 obj \ n<< / Type / Pages / Kids [;
for（ int i = 0; i< numPages; i ++）
{
strTmpObj + =（（（i + 1）* 3）+ 1）+0 R \\ \\ n;
}
strTmpObj + =] /计数+ numPages +>> \ nndobj \ n;
xRefList.Add（calculateXPos（（int）PDFBytes.Length））; // refenrece to obj 3
PDFBytes.Write（stringToBytes（strTmpObj），0，strTmpObj.Length）;
//每个图像页面
for（int itr = 0; itr< numPages; itr ++）
{
string iWidth = getMeta（width，itr）;
string iHeight = getMeta（height，itr）;
// OBJECT 4..7..10 .. n：页面配置
strTmpObj =（（（itr + 2）* 3） - 2）+0 obj\\\
<< \\\
/ Type / Page / Parent 3 0 R \\ \\ n / MediaBox [0 0+ iWidth ++ iHeight +] \ n / Resources<< \ n / ProcSet [/ PDF] \ n / XObject<< / R+（ itr + 1）++（（itr + 2）* 3）+0 R>> \\\
>> \ n / Contents [+（（（itr + 2）* 3） - 1 ）+0 R] \ n>> \ nndobj \ n;
xRefList.Add（calculateXPos（（int）PDFBytes.Length））; // refenrece to obj 4,7,10,13,16 ...
PDFBytes.Write（stringToBytes（strTmpObj），0，strTmpObj.Length）;
< br $>
// OBJECT 5 ... 8 ... 11 ... n：页面资源对象（转换图像的xobject资源）
xRefList.Add（calculateXPos（（int）PDFBytes.Length））; // refenrece to obj 5,8,11,14,17 ...
string xObjR = getXObjResource（itr）;
PDFBytes.Write（stringToBytes（xObjR）， 0，xObjR.Length）;
//对象6 ... 9 ... 12 ... n：页面的二进制xobject（图像）
byte [] imgBA = addImageToPDF（itr，isCompressed）;
xRefList.Add（calculateXPos（（int）PDFBytes.Length））; // refenrece to obj 6,9， 12,15,18 ...
PDFBytes.Write（imgBA，0，imgBA.Length）;
}
//外部参考编译
xRefList [0] + =（（xRefList.Count - 1）+\ n）;
//获取预告片
string trailer = getTrailer（（int）PDFBytes.Length，xRefList.Count - 1）;
//将外部参照和预告片写入PDF
string strXRefs = string.Join（，（string []）xRefList.ToArray（typeof（string））） ;
PDFBytes.Write（stringToBytes（strXRefs），0，strXRefs.Length）;
//
PDFBytes.Write（stringToBytes（trailer） ），0，trailer.Length）;
//写EOF
string strEOF =%% EOF \ n;
PDFBytes.Write（stringToBytes（strEOF），0，strEOF.Length）;
PDFBytes.Close（）;
返回PDFBytes.ToArray（）;
}
I'm using FuscionChart FCExporter class to export charts to Pdf, PNG, etc. The problem I'm facing is I want a page after the chart to show a Grid View print out of the data.
There a few options for implementing this:
1. Create chart PDF then gridview PDF and merge the two documents
-Problem: I have no idea where to start with this. I'm unsure where in the class to call
the other document and merge.
2. Update routine to allow a GridView to be added after the chart element is added to the
docuement.
Problem: The closest I came to it working was getting a second page to print in the document but the Grid View would never show and I'm unsure why.
Code For adding elements to PDF:
private byte[] getPDFObjects(bool isCompressed)
{
MemoryStream PDFBytes = new MemoryStream();
//Store all PDF objects in this temporary string to be written to ByteArray
string strTmpObj = "";
//start xref array
ArrayList xRefList = new ArrayList();
xRefList.Add("xref\n0 ");
xRefList.Add("0000000000 65535 f \n"); //Address Refenrece to obj 0
//Build PDF objects sequentially
//version and header
strTmpObj = "%PDF-1.3\n%{FC}\n";
PDFBytes.Write(stringToBytes(strTmpObj), 0, strTmpObj.Length);
//OBJECT 1 : info (optional)
strTmpObj = "1 0 obj<<\n/Author (FusionCharts)\n/Title (FusionCharts)\n/Creator (FusionCharts)\n>>\nendobj\n";
xRefList.Add(calculateXPos((int)PDFBytes.Length)); //refenrece to obj 1
PDFBytes.Write(stringToBytes(strTmpObj), 0, strTmpObj.Length);
//OBJECT 2 : Starts with Pages Catalogue
strTmpObj = "2 0 obj\n<< /Type /Catalog /Pages 3 0 R >>\nendobj\n";
xRefList.Add(calculateXPos((int)PDFBytes.Length)); //refenrece to obj 2
PDFBytes.Write(stringToBytes(strTmpObj), 0, strTmpObj.Length);
//OBJECT 3 : Page Tree (reference to pages of the catalogue)
strTmpObj = "3 0 obj\n<< /Type /Pages /Kids [";
for (int i = 0; i < numPages; i++)
{
strTmpObj += (((i + 1) * 3) + 1) + " 0 R\n";
}
strTmpObj += "] /Count " + numPages + " >>\nendobj\n";
xRefList.Add(calculateXPos((int)PDFBytes.Length)); //refenrece to obj 3
PDFBytes.Write(stringToBytes(strTmpObj), 0, strTmpObj.Length);
//Each image page
for (int itr = 0; itr < numPages; itr++)
{
string iWidth = getMeta("width", itr);
string iHeight = getMeta("height", itr);
//OBJECT 4..7..10..n : Page config
strTmpObj = (((itr + 2) * 3) - 2) + " 0 obj\n<<\n/Type /Page /Parent 3 0 R \n/MediaBox [ 0 0 " + iWidth + " " + iHeight + " ]\n/Resources <<\n/ProcSet [ /PDF ]\n/XObject <</R" + (itr + 1) + " " + ((itr + 2) * 3) + " 0 R>>\n>>\n/Contents [ " + (((itr + 2) * 3) - 1) + " 0 R ]\n>>\nendobj\n";
xRefList.Add(calculateXPos((int)PDFBytes.Length)); //refenrece to obj 4,7,10,13,16...
PDFBytes.Write(stringToBytes(strTmpObj), 0, strTmpObj.Length);
//OBJECT 5...8...11...n : Page resource object (xobject resource that transforms the image)
xRefList.Add(calculateXPos((int)PDFBytes.Length)); //refenrece to obj 5,8,11,14,17...
string xObjR = getXObjResource(itr);
PDFBytes.Write(stringToBytes(xObjR), 0, xObjR.Length);
//OBJECT 6...9...12...n : Binary xobject of the page (image)
byte[] imgBA = addImageToPDF(itr, isCompressed);
xRefList.Add(calculateXPos((int)PDFBytes.Length));//refenrece to obj 6,9,12,15,18...
PDFBytes.Write(imgBA, 0, imgBA.Length);
}
//xrefs compilation
xRefList[0] += ((xRefList.Count - 1) + "\n");
//get trailer
string trailer = getTrailer((int)PDFBytes.Length, xRefList.Count - 1);
//write xref and trailer to PDF
string strXRefs = string.Join("", (string[])xRefList.ToArray(typeof(string)));
PDFBytes.Write(stringToBytes(strXRefs), 0, strXRefs.Length);
//
PDFBytes.Write(stringToBytes(trailer), 0, trailer.Length);
//write EOF
string strEOF = "%%EOF\n";
PDFBytes.Write(stringToBytes(strEOF), 0, strEOF.Length);
PDFBytes.Close();
return PDFBytes.ToArray();
}
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