Use C # To draw a chart (pie chart line chart)

Public placeholder placeholder1; // controls for displaying images

The category names of each image are as follows:

Picturetype Graphic Type 5 chcharttypebarclustered clustered bar chart 0 null

Picturetype Graphic Type 7 chcharttypebarclustered3d 3D clustered bar chart 0 null

Picturetype Graphic Type 6 chcharttypebarstacked Stacked bar chart 0 null

Picturetype Graphic Type 8 chcharttypebarstacked3d Stacked bar chart 0 null

Picturetype Graphic Type 1 chcharttypecolumnclustered clustered column type 0 null

Picturetype Graphic Type 3 chcharttypecolumnclustered3d 3D clustered column type 0 null

Picturetype Graphic Type 2 chcharttypecolumnstacked Stacked column Chart 1 null

Picturetype Graphic Type 4 chcharttypecolumnstacked3d Stacked column limit 0 null

Picturetype Graphic Type 13 chcharttypeline line chart 0 null

Picturetype graph type 15 chcharttypelinemarkers data point line chart 0 null

Picturetype Graphic Type 14 chcharttypelinestacked stacked line chart 0 null

Picturetype Graphic Type 16 chcharttypelinestackedmarkers stacked data point line chart 0 null

Picturetype Graphic Type 17 chcharttypepie pie chart 1 null

Picturetype Graphic Type 19 chcharttypepie3d 3D pie chart 0 null

Picturetype graphic type 18 chcharttypepieexploded separated pie chart 0 null

Picturetype Graphic Type 20 chcharttypepieexploded3d separated 3D pie chart 0 null

Picturetype Graphic Type 9 chcharttypesmoothline smoothing line chart 0 null

Picturetype Graphic Type 10 chcharttypesmoothlinemarkers data point smoothing line chart 0 null

Picturetype Graphic Type 11 chcharttypesmoothlinestacked stacked smoothing line chart 0 null

Picturetype Graphic Type 12 chcharttypesmoothlinestackedmarkers stacked Data Smoothing Line chart 0 null

The image retrieval method is as follows:

/// </Summary> /// <Param name = "dbdtviewwrk"> transmitted data </param> /// <Param name = "strabsolutepath"> absolute path </ param> /// <Param name = "strrelativepath"> relative path </param> /// <Param name = "charttype"> Format of the graph to be drawn (pie chart or line chart)) </param> // <Param name = "strtitle"> statistical name </param> Public void painttoimage (datatable dbdtviewwrk, string strabsolutepath, string strrelativepath, character charttype, string strtitle) {string STRs Eriesname = "legend"; // stores the project string [] itemsname = new string [dbdtviewwrk. rows. count]; // string [] itemscount = new string [dbdtviewwrk. rows. count]; // The unit of scale int iunit = 1; // The maximum value int imaxvalue = 0; string strxdata = string. empty; string strydata = string. empty; // assign a value to the array for (INT I = 0; I <dbdtviewwrk. rows. count; I ++) {itemsname [I] = dbdtviewwrk. rows [I] [0]. tostring (); // field name to be counted itemscount [I] = dbdtvi Ewwrk. rows [I] [5]. tostring (); // field data to be calculated} // specify a specific string for the X axis to display data // string strxdata = string. empty; foreach (string strdata in itemsname) {strxdata + = strdata + "\ t" ;}// string strydata = string. empty; // specify a specific string for the Y axis to correspond to the X axis in foreach (string strvalue in itemscount) {strydata + = strvalue + "\ t"; if (Int. parse (strvalue)> imaxvalue) {imaxvalue = int. parse (strvalue) ;}}if (imaxvalue> 20) {iunit = Imaxvalue/10;} // create a chartspace object to place the chart chartspace layspace = new chartspaceclass (); // Add the chart chchart insertchart = layspace to the chartspace object. charts. add (0); // base color insertchart. plotarea. interior. color = "white"; // specify the chart type. You can use owc. chartcharttypeenum enumeration is worth accessing insertchart. type = charttype; // column chart // specifies whether the legend is required to indicate insertchart. haslegend = true; insertchart. barwidth = 0; insertchart. legend. position = chartlegendpositionenum. chlegendpositionbottom; insertchart. hastitle = true; // Add the title insertchart for the chart. title. caption = strtitle; // The title name. // If (charttype. tostring (). indexof ("charttypepie") =-1) {insertchart. axes [0]. font. size = 11; // the X axis of insertchart. axes [1]. font. size = 11; // y axis insertchart. legend. font. size = 11; insertchart. axes [0]. hastitle = true; insertchart. axes [0]. title. caption = ""; // insertchart of the month. axes [1]. hastitle = true; // insertchart. axes [1]. scaling. splitminimum = 200; insertchart. axes [1]. title. caption = "quantity"; insertchart. axes [1]. majorunit = iunit; // set the scale unit to insertchart. axes [1]. scaling. minimum = 0; // min scale = 0} // Add Add a series insertchart. seriescollection. add (0); // specifies the name of the Series, insertchart. seriescollection [0]. setdata (chartdimensionsenum. chdimseriesnames, + (INT) chartspecialperformancesenum. chdataliteral, strseriesname); // you can specify strxdata = strxdata. substring (0, strxdata. length-1); insertchart. seriescollection [0]. setdata (chartdimensionsenum. chdimcategories, + (INT) chartspecialperformancesenum. chdataliteral, strx Data); // specify strydata = strydata. substring (0, strydata. length-1); insertchart. seriescollection [0]. setdata (chartdimensionsenum. chdimvalues, (INT) chartspecialperformancesenum. chdataliteral, strydata); // Add the label chdatalabels DLS = insertchart. seriescollection [0]. datalabelscollection. add (); If (charttype. tostring (). indexof ("charttypepie ")! =-1) {DLS. position = chartdatalabelpositionenum. chlabelpositioncenter; DLS. haspercentage = false; // DLS. hasvalue = false; DLS. hascategoryname = false; // specifies whether the legend of the chart needs to be labeled as insertchart. haslegend = true; insertchart. legend. position = chartlegendpositionenum. chlegendpositionbottom;} // output file. int iimagelength = 0; int iimagewidth = 0; // get the settings from the config file // iimagelength = int. parse (webconfigurationmanager. appsettings ["showimagelength"]); // iimagewidth = int. parse (webconfigurationmanager. appsettings ["showimagewidth"]); iimagelength = 450; iimagewidth = 300; string strimagename = charttype. tostring () + "_" + guid. newguid (). tostring ("N") + ". PNG "; layspace. exportpicture (strabsolutepath + strimagename, "PNG", 450,300); // Add the image to placeholder, the string strimagetag = "
 
Use C # To draw a chart (pie chart line chart)