Use graphics to export images. [This is only code and will be improved in the future .]

/// <Summary> // export the signaling process vector graph /// </Summary> /// <Param name = "signalflowinfos"> signaling process </param> // /<returns> path </returns> Public String exporttoimage (list <signalflowinfo> List) {list <signalopinion> signalopinionlist = getsignalopinion (); seriesopinionoffsetdic = new dictionary <string, int> (); seriesopinionbrushdic = new dictionary <string, brush> (); string [] seriesnamearr = new string [signalopinionlist. cou NT]; for (INT I = 0; I <signalopinionlist. count; I ++) {seriesopinionoffsetdic. add (signalopinionlist [I]. name, 80 + itemwidth * I); seriesopinionbrushdic. add (signalopinionlist [I]. name, new solidbrush (color. fromargb (signalopinionlist [I]. colora, signalopinionlist [I]. colorr, signalopinionlist [I]. colorg, signalopinionlist [I]. colorb); seriesnamearr [I] = signalopinionlist [I]. name;} int imgwidth = 80 + signalop Inionlist. Count * itemwidth; bitmap BMP = new Bitmap (imgwidth, (list. Count + 2) * itemheight); graphics GS = graphics. fromimage (BMP); If (! Directory. exists (tempfilespath) {directory. createdirectory (tempfilespath);} string filename = "signaling flowchart" + system. guid. newguid (). tostring () + ". zip "; string filepath = tempfilespath +" \ "+ filename; Metafile mf = NULL; graphics G = NULL; try {mf = new Metafile (filepath, Gs. gethdc (); G = graphics. fromimage (MF); drawnew (G, list, seriesnamearr); G. save ();} catch (exception ERR) {webloglayout. err Or (new list <string> () {"failed to export the signaling flow vector diagram:" + err. message}); // return ""; Exception E = new exception ("failed to export the signaling flow vector diagram", err); throw e ;}finally {If (G! = NULL) g. Dispose (); If (MF! = NULL) MF. dispose ();} return filename ;} /// <summary> /// drawing // </Summary> /// <Param name = "G"> GDI + drawing </param> /// <param name = "signalflowinfos"> data object set </param> private void drawnew (Graphics G, list <signalflowinfo> signalflowinfos, string [] seriesnamearr) {int imgwidth = 80 + seriesnamearr. length * itemwidth; // canvas width int imgheight = (signalflowinfos. count + 2) * itemheight; // canvas height font fonttitle = New font ("", 12, fontstyle. bold); font = new font ("", 9, fontstyle. regular); # region defines the header point celllocation = new point (5, 5); stringformat format = new stringformat (); format. alignment = stringalignment. center; format. linealignment = stringalignment. center; rectangle cellrect; Pen = new pen (brushes. black, 1); For (INT I = 0; I <seriesnamearr. length; I ++) {string name = seriesname Arr [I]; cellrect = new rectangle (seriesopinionoffsetdic [name] + (itemWidth-100)/2, 5,100, 30); // 100 is the width of the rectangle tittle // G. fillrectangle (seriesopinionbrushdic [name], cellrect); createroundrectangle. fillroundrectangle (G, seriesopinionbrushdic [name], cellrect, 5); pen. brush = brushes. black; pen. dashstyle = system. drawing. drawing2d. dashstyle. solid; // draw the dotted line createroundrectangle. drawroundrectangle (G, pen, cellr ECT, 5); G. drawstring (name, fonttitle, brushes. black, seriesopinionoffsetdic [name] + itemwidth/2, 20, format); // pen = new pen (seriesopinionbrushdic [name], 2); // column color pen. brush = seriesopinionbrushdic [name]; pen. dashstyle = system. drawing. drawing2d. dashstyle. dot; // draw the dotted pen. dashpattern = new float [] {3, 2}; int xline = seriesopinionoffsetdic [name] + itemwidth/2; G. drawline (pen, xline, 35, xline, imgh Eight); // draw a column} # endregion int hight = 35; color colorto = colortranslator. fromhtml ("#008000"); // color to the right colorfrom = colortranslator. fromhtml ("# ffa500"); // color to the left: String fromx1name; string tox2name; int seriesoffsetto; int seriesoffsetfrom; pen. dashstyle = system. drawing. drawing2d. dashstyle. solid; // draw the solid line for (INT I = 0; I <signalflowinfos. count; I ++) {# region first line fromx1name = signalflowinfos [I]. From; tox2name = signalflowinfos [I]. to; seriesoffsetto = response [tox2name] + itemwidth/2; seriesoffsetfrom = response [fromx1name] + itemwidth/2; cellrect = new rectangle (6, hight + 1, imgwidth, itemheight ); format. alignment = stringalignment. near; G. drawstring (signalflowinfos [I]. time, Font, brushes. black, cellrect, format); // connection line and arrow pen. width = 2; If (array. indexo F (seriesnamearr, fromx1name) <array. indexof (seriesnamearr, tox2name) // draw the right arrow {pen. color = colorto; G. drawline (pen, seriesoffsetto-10, hight + itemheight/2-5, seriesoffsetto-5, hight + itemheight/2); // online G. drawline (pen, seriesoffsetto-10, hight + itemheight/2 + 5, seriesoffsetto-5, hight + itemheight/2 ); // offline} else // draw the left arrow {pen. color = colorfrom; G. drawline (pen, seriesoffsetto + 5, high T + itemheight/2, seriesoffsetto + 10, hight + itemheight/2-5); // online G. drawline (pen, seriesoffsetto + 5, hight + itemheight/2, seriesoffsetto + 10, hight + itemheight/2 + 5); // offline} pen. width = 1; G. drawline (pen, seriesoffsetfrom, hight + itemheight/2, seriesoffsetto, hight + itemheight/2); cellrect = new rectangle (seriesoffsetfrom-5, hight + itemheight/2-5, 10, 10); G. fillellipse (seriesopinio Nbrushdic [fromx1name], cellrect); // circle G. drawellipse (pens. black, cellrect); // draw the border cellrect = new rectangle (seriesoffsetto-5, hight + itemheight/2-5, 10, 10); G. fillellipse (seriesopinionbrushdic [tox2name], cellrect); G. drawellipse (pens. black, cellrect); // write message cellrect = new rectangle (seriesoffsetfrom <seriesoffsetto? Seriesoffsetfrom: seriesoffsetto, hight, itemwidth-10, itemheight); format. alignment = stringalignment. center; G. drawstring (signalflowinfos [I]. message, Font, brushes. black, cellrect, format); # endregion hight + = itemheight ;}}

 

Use graphics to export images. [This is only code and will be improved in the future .]