我使用以下代码来创建图表
chart1.Series[0].ChartType = SeriesChartType.Line;
chart1.DataSource = dict;
chart1.Series[0].XValueMember = "Key";
chart1.Series[0].YValueMembers = "Value";
chart1.Series[0].IsVisibleInLegend = false;
chart1.ChartAreas[0].AxisX.MajorGrid.LineWidth = 0;
chart1.ChartAreas[0].AxisY.MajorGrid.LineWidth = 0;
chart1.ChartAreas[0].AxisX.LabelStyle.Format = "0.00";
chart1.ChartAreas[0].AxisY.LabelStyle.Format = "0.00";
chart1.ChartAreas[0].AxisX.ScaleView.Zoomable = true;
chart1.ChartAreas[0].AxisY.ScaleView.Zoomable = true;
chart1.Refresh();
和以下代码用滚动放大图表
double xMin = chart1.ChartAreas[0].AxisX.ScaleView.ViewMinimum;
double xMax = chart1.ChartAreas[0].AxisX.ScaleView.ViewMaximum;
double yMin = chart1.ChartAreas[0].AxisY.ScaleView.ViewMinimum;
double yMax = chart1.ChartAreas[0].AxisY.ScaleView.ViewMaximum;
double posXStart = chart1.ChartAreas[0].AxisX.PixelPositionToValue(e.Location.X) - (xMax - xMin) / 4;
double posXFinish = chart1.ChartAreas[0].AxisX.PixelPositionToValue(e.Location.X) + (xMax - xMin) / 4;
double posYStart = chart1.ChartAreas[0].AxisY.PixelPositionToValue(e.Location.Y) - (yMax - yMin) / 4;
double posYFinish = chart1.ChartAreas[0].AxisY.PixelPositionToValue(e.Location.Y) + (yMax - yMin) / 4;
chart1.ChartAreas[0].AxisX.ScaleView.Zoom(posXStart, posXFinish);
chart1.ChartAreas[0].AxisY.ScaleView.Zoom(posYStart, posYFinish);
我试图能够在我按住左键的同时用鼠标移动缩放图表。