C# 使用zedgraph繪製 柱狀圖的詳解

1.下載zedGraph控制項：http://download.csdn.net/detail/allisnew/322251

2.添加引用 zedGraph.dll

3.在工具箱的最後面添加常規控制項--瀏覽--選擇zedgraph.dll

4.編寫如下初始化代碼(也可以直接拖一個控制項)：

private ZedGraphControl zedGraphControl1 = new ZedGraphControl(); this.zedGraphControl1.Location = new System.Drawing.Point(36, 48);            this.zedGraphControl1.Name = "zedGraphControl1";            this.zedGraphControl1.ScrollGrace = 0;            this.zedGraphControl1.ScrollMaxX = 0;            this.zedGraphControl1.ScrollMaxY = 0;            this.zedGraphControl1.ScrollMaxY2 = 0;            this.zedGraphControl1.ScrollMinX = 0;            this.zedGraphControl1.ScrollMinY = 0;            this.zedGraphControl1.ScrollMinY2 = 0;            this.zedGraphControl1.Size = new System.Drawing.Size(427, 247);            this.zedGraphControl1.TabIndex = 0;            this.Controls.Add(zedGraphControl1);

5.編寫繪圖代碼：

 private void ShowChart()        {            zedGraphControl1.GraphPane.CurveList.Clear();            zedGraphControl1.GraphPane.GraphObjList.Clear();            // clearing not teste            GraphPane myPane = zedGraphControl1.GraphPane;            myPane.Title.Text = "消費者學曆統計";  //設計圖表的標題            myPane.XAxis.Title.Text = "學曆類型"; //X軸標題            myPane.YAxis.Title.Text = "人數"; //Y軸標題            //      myPane.XAxis.Type = ZedGraph.AxisType.Date;            // Date wont work in our case            PointPairList PPLa = new PointPairList();            PointPairList PPLb = new PointPairList();            PointPairList PPLc = new PointPairList();            PointPairList PPLd = new PointPairList();            for (int i = 1; i < 2; i++)            {                PPLa.Add(i, i + 3);                PPLb.Add(i + 1, i + 4);                PPLc.Add(i + 2, i + 5);                PPLd.Add(i + 3, i + 6);            }            // dragged drawing baritems out of forloop            BarItem myBara = myPane.AddBar("A", PPLa, Color.Red);            BarItem myBarb = myPane.AddBar("B", PPLb, Color.Blue);            BarItem myBarc = myPane.AddBar("C", PPLc, Color.Gray);            BarItem myBard = myPane.AddBar("D", PPLd, Color.Black);            zedGraphControl1.AxisChange();            zedGraphControl1.Refresh();//這句話非常重要，否則不會立即顯示        }

如需要橫座標顯示文字：

 private void ShowChart()        {            zedGraphControl1.GraphPane.CurveList.Clear();            zedGraphControl1.GraphPane.GraphObjList.Clear();            // clearing not teste            GraphPane myPane = zedGraphControl1.GraphPane;            // 畫圖面版標題            myPane.Title.Text = "收入統計";            // 畫圖面版X標題            myPane.XAxis.Title.Text = "地區";            myPane.XAxis.Scale.Min = 0;            //初始化資料            PointPairList list = new PointPairList();            PointPairList list2 = new PointPairList();            PointPairList list3 = new PointPairList();            for (int i = 0; i < 5; i++)////這裡的數量要和lable的一致，比如橫座標顯示了5個lable，這裡就要給5個            {                list.Add(i, i+1);                list2.Add(i, i + 2);                list3.Add(i, i + 3);            }                        // 畫圖面版Y標題            myPane.YAxis.Title.Text = "銷售情況";            //柱的畫筆            //    public BarItem AddBar(string 名稱, IPointList 資料, Color 顏色);            BarItem myCurve = myPane.AddBar("收入1", list, Color.Blue);            BarItem myCurve1 = myPane.AddBar("收入2", list2, Color.Purple);            BarItem myCurve2 = myPane.AddBar("收入3", list3, Color.YellowGreen);            //myCurve.Bar.Fill = new Fill(Color.Blue, Color.White, Color.Blue);//漸層           // BarItem myCurve2 = myPane.AddBar("買農藥", list2, Color.Red);           // myCurve2.Bar.Fill = new Fill(Color.Red, Color.White, Color.Red);          //  BarItem myCurve3 = myPane.AddBar("買化肥", list3, Color.Green);           // myCurve3.Bar.Fill = new Fill(Color.Green, Color.White, Color.Green);            //myPane.XAxis.MajorTic.IsBetweenLabels = true;            //XAxis標註            string[] labels = { "產品1", "產品2", "產品3", "產品4", "產品5" };            myPane.XAxis.Scale.TextLabels = labels;            myPane.XAxis.Type = AxisType.Text;            //圖區以外的顏色           // myPane.Fill = new Fill(Color.White, Color.FromArgb(200, 200, 255), 45.0f);            //背景顏色           // myPane.Chart.Fill = new Fill(Color.Red, Color.LightGoldenrodYellow, 45.0f);            zedGraphControl1.AxisChange();            zedGraphControl1.Refresh();        }

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