Can't set sparklines in Excel file

I'm working with Aspose Cells 2.4 for Java and I'm having some trouble setting sparklines. This is the code:

CellArea ca = new CellArea();    

for (int k2=5;k2<=100;k2++){        

  ca.setStartColumn(21);
  ca.setEndColumn(21);
  ca.setStartRow(k2);
  ca.setEndRow(k2);

  String range = "Q"+k2+",R"+k2+",S"+k2+",T"+k2;
  int idx = sheet.getSparklineGroupCollection().add(SparklineType.LINE, range, false, ca);
  SparklineGroup group = sheet.getSparklineGroupCollection().get(idx);
  group.setSeriesColor(Color.RED);
}

I'm currently using Excel 2010. When I generate the file, the cells where sparklines are supposed to be are empty.

Thank you very much for your help and sorry for 开发者_开发百科my English.

Have you tried using Aspose.Cells for Java 2.5.4 -- the latest version? Probably, this latest version is going to resolve your issue. If it doesn't resolve the issue then you might want to directly contact our support team for further help.

Disclosure: I work as developer evangelist at Aspose.

I could not find a way to make sparklines work but I made a short method to manually draw a 4 points sparkline. I'm working on making it n-point sparkline with a loop but I got this so far:

import java.io.IOException;
import java.util.Arrays;

import com.aspose.cells.MsoLineDashStyle;
import com.aspose.cells.PlacementType;
import com.aspose.cells.ShapeLine;
import com.aspose.cells.Workbook;
import com.aspose.cells.Worksheet;


public class Main {
public static void main(String[] args) throws IOException{
    Workbook oWorkbook = new Workbook();

    Worksheet oWorksheet = oWorkbook.getWorksheets().addSheet("Sparklines");
    oWorksheet.getCells().getCell("A1").setValue(10);
    oWorksheet.getCells().getCell("B1").setValue(10);
    oWorksheet.getCells().getCell("C1").setValue(10);
    oWorksheet.getCells().getCell("D1").setValue(10);

    //We get the values from Excel worksheet
    int val1 =  Integer.parseInt(oWorksheet.getCells().getCell("A1").getValue().toString());
    int val2 =  Integer.parseInt(oWorksheet.getCells().getCell("B1").getValue().toString());
    int val3 =  Integer.parseInt(oWorksheet.getCells().getCell("C1").getValue().toString());
    int val4 =  Integer.parseInt(oWorksheet.getCells().getCell("D1").getValue().toString());

    //We set ascending sort
    int[] nums={val1,val2,val3,val4};  
    Arrays.sort(nums);  
    System.out.println("Minimum = " + nums[0]);  
    System.out.println("Maximum = " + nums[nums.length-1]);

    //constant values
    float height = 17;
    float width = 64;
    float dist = 20; //horizontal offset for each point

    //we find a constant to set the proportion between the point values and the cell height
    float con = height/nums[nums.length-1];
    System.out.println("Con = " + con);

    //we find the offset values ??relative to the upper edge of the cell
    float point1 = height - val1*con;
    float point2 = height - val2*con;
    float point3 = height - val3*con;
    float point4 = height - val4*con;

    //we'll have to round those values up
    int point1_int = Math.round(point1);
    int point2_int = Math.round(point2);
    int point3_int = Math.round(point3);
    int point4_int = Math.round(point4);

    System.out.println(point1);
    System.out.println(point2);
    System.out.println(point3);
    System.out.println(point4);
    /**********************************START OF LINE1*********************************************************/

    double  oposed_line = point1_int-point2_int;
    System.out.println("oposed_line:"+oposed_line);



    double hipotenusa = Math.sqrt(Math.pow(oposed_line, 2)+Math.pow(dist, 2));
    Math.round(hipotenusa);
    System.out.println("Hipotenusa: "+hipotenusa);

    //printing the line
    com.aspose.cells.LineShape line1  = oWorksheet.getShapes().addLine(0,4,2,point1_int, (int)hipotenusa, 0);

    //finding rotation_angle
    double rotation_angle =  Math.atan((oposed_line)/dist);
    rotation_angle = Math.toDegrees(rotation_angle);
    System.out.println("Angle 1: "+rotation_angle);

    line1.setRotation((float)-rotation_angle);

    /**********************************END OF LINE1*********************************************************/


    /********************************** LINE2*********************************************************/

    oposed_line = point2_int-point3_int;
    System.out.println("oposed_line:"+oposed_line);

    hipotenusa = Math.sqrt(Math.pow(oposed_line, 2)+Math.pow(dist, 2));
    Math.round(hipotenusa);
    System.out.println("Hipotenusa: "+hipotenusa);


    com.aspose.cells.LineShape line2  = oWorksheet.getShapes().addLine(0,4,(int)dist,point2_int, (int)hipotenusa, 0);

    rotation_angle =  Math.atan((oposed_line)/dist);
    rotation_angle = Math.toDegrees(rotation_angle);
    System.out.println("Angle 2: "+rotation_angle);

    line2.setRotation((float)-rotation_angle);

    /********************************** LINE2*********************************************************/     


    /**********************************LINE3*********************************************************/

    oposed_line = point3_int-point4_int;
    System.out.println("oposed_line:"+oposed_line);

    hipotenusa = Math.sqrt(Math.pow(oposed_line, 2)+Math.pow(dist, 2));
    Math.round(hipotenusa);
    System.out.println("Hipotenusa: "+hipotenusa);


    int offset = (int) (dist*2);
    com.aspose.cells.LineShape line3  = oWorksheet.getShapes().addLine(0,4,offset,point3_int,(int)hipotenusa, 0);


    rotation_angle =  Math.atan(oposed_line/dist);
    rotation_angle = Math.toDegrees(rotation_angle);
    System.out.println("Angle 3: "+rotation_angle);

    line3.setRotation((float)-rotation_angle);

    /**********************************LINE3*********************************************************/

    //Set the line dash style

    ShapeLine shapeline = line1.getLine();
    ShapeLine shapeline2 = line2.getLine();
    ShapeLine shapeline3 = line3.getLine();


    shapeline.setDashStyle(MsoLineDashStyle.SOLID);
    shapeline2.setDashStyle(MsoLineDashStyle.SOLID);
    shapeline3.setDashStyle(MsoLineDashStyle.SOLID);

    short smallNumber = 3;
    System.out.println(smallNumber);

    line1.setLineEndArrowHead(smallNumber);
    line2.setLineEndArrowHead(smallNumber);
    line3.setLineEndArrowHead(smallNumber);


    //Set the placement.

    line1.setPlacement(PlacementType.FREE_FLOATING);
    line2.setPlacement(PlacementType.FREE_FLOATING);
    line3.setPlacement(PlacementType.FREE_FLOATING);

    oWorkbook.save("C:\\test3.xlsx");

}

}