ZedGraphControl zedGraphNew = new ZedGraphControl();
//此处设置的zedGraphNew的大小要大于最后生成的myPane的图像大小
zedGraphNew.Size = new System.Drawing.Size(750, 700);
GraphPane myPane = new GraphPane(zedGraphNew.GraphPane);
//为myPane绘制图像(包括坐标轴设置)
GetCurrDataFilePane(myPane, currDataFile, cycleDataList, stepDataList, recordDataList);
zedGraphNew.GraphPane = myPane;
image = zedGraphNew.GetImage();