使用 ZedGraph 製作統計圖 转载

//記得要加入參考
using ZedGraph;
 
//資料來源        
private DataTable getDT()
{
    DataTable dt = new DataTable();
    dt.Columns.Add("學號", System.Type.GetType("System.String"));
    dt.Columns.Add("姓名", System.Type.GetType("System.String"));
    dt.Columns.Add("國文", System.Type.GetType("System.Int32"));
    dt.Columns.Add("英文", System.Type.GetType("System.Int32"));
    dt.Columns.Add("數學", System.Type.GetType("System.Int32"));
 
    dt.Rows.Add("B9510001", "崔昱翰", 85, 66, 71);
    dt.Rows.Add("B9510002", "王詩光", 65, 92, 88);
    dt.Rows.Add("B9510003", "劉育白", 52, 66, 63);
    dt.Rows.Add("B9510004", "許威宇", 98, 70, 61);
    dt.Rows.Add("B9510005", "李佩珊", 81, 63, 76);
    dt.Rows.Add("B9510006", "潘紹興", 91, 77, 76);
 
    return dt;
}
 
//學生成績
public void StudentChart1(ZedGraphControl zgc)
{
    // Google網域搜尋：Fill site:http://zedgraph.sourceforge.net/documentation
 
    GraphPane myPane = zgc.GraphPane;
    
    //
    DataTable dt = getDT();
 
    // Set the title and axis labels
    myPane.Title.Text = "學生成績量化表";
    myPane.XAxis.Title.Text = "學生姓名";
    myPane.YAxis.Title.Text = "分數";
 
    PointPairList list1 = new PointPairList();
    PointPairList list2 = new PointPairList();
    PointPairList list3 = new PointPairList();
    
    Random rand = new Random();
 
    // Generate random data for three curves
    for (int i = 0; i <dt.Rows.Count; i++)
    {
        
        double x = (double)i;
        double y1_chian = Convert.ToDouble(dt.Rows[i]["國文"]);
        double y2_eng = Convert.ToDouble(dt.Rows[i]["英文"]);
        double y3_math = Convert.ToDouble(dt.Rows[i]["數學"]);
        list1.Add(x, y1_chian);
        list2.Add(x, y2_eng);
        list3.Add(x, y3_math);
    }
 
    // create the curves
    // BarItem.Bar.Fill(Color) 填入單一顏色
    // BarItem.Bar.Fill(Color, Color, Color, 90) 填入漸層顏色，第4參數是旋轉角度
    BarItem myCurve1 = myPane.AddBar("國文", list1, Color.Red);
    myCurve1.Bar.Fill = new Fill(Color.FromArgb(255, 238, 221));
    
    BarItem myCurve2 = myPane.AddBar("英文", list2, Color.Blue);
    myCurve2.Bar.Fill = new Fill(Color.FromArgb(221, 255, 238));
    
    BarItem myCurve3 = myPane.AddBar("數學", list3, Color.Green);
    myCurve3.Bar.Fill = new Fill(Color.FromArgb(238, 221, 255));
 
    
    
    // Fill the axis background with a color gradient
    // 背景色
    // myPane.Chart.Fill = new Fill(Color.White, Color.FromArgb(255, 255, 166), 45.0F);
 
    myPane.XAxis.MajorTic.IsBetweenLabels = true;
 
    //加入X LabelText
    string[] labels = new string[6];
    for (int i = 0; i <dt.Rows.Count; i++)
    {
        labels[i] = Convert.ToString(dt.Rows[i]["姓名"]);
    }
    myPane.XAxis.Scale.TextLabels = labels; //X軸的說明文字
    myPane.XAxis.Type = AxisType.Text;      //X軸類型
 
    //重新計算目前數據範圍
    zgc.AxisChange();
 
    // expand the range of the Y axis slightly to accommodate the labels
    // myPane.YAxis.Scale.Max += myPane.YAxis.Scale.MajorStep;
    // YAxis最大值
    myPane.YAxis.Scale.Max = 110;
 
    // Create TextObj's to provide labels for each bar
    // 在bar上顯示數值
    BarItem.CreateBarLabels(myPane, false, "f0");
 
    //顯示格點
    myPane.YAxis.MajorGrid.IsVisible = true;
    myPane.XAxis.MajorGrid.IsVisible = true;
}