C# 使用zedgraph绘制 柱状图

1.下载zedGraph控件：http://download.csdn.net/detail/allisnew/322251

2.添加引用 zedGraph.dll

3.在工具箱的最后面添加常规控件--浏览--选择zedgraph.dll

4.编写如下初始化代码(也可以直接拖一个控件)：

 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.编写绘图代码：

private void ShowChart()
{
zedGraphControl1.GraphPane.CurveList.Clear();
zedGraphControl1.GraphPane.GraphObjList.Clear();
// clearing not teste

GraphPane myPane = zedGraphControl1.GraphPane;

myPane.Title.Text = "消费者学历统计"; //设计图表的标题
myPane.XAxis.Title.Text = "学历类型"; //X轴标题
myPane.YAxis.Title.Text = "人数"; //Y轴标题
// 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();//这句话非常重要，否则不会立即显示
}


如需要横坐标显示文字：

    private void ShowChart()
{
zedGraphControl1.GraphPane.CurveList.Clear();
zedGraphControl1.GraphPane.GraphObjList.Clear();
// clearing not teste

GraphPane myPane = zedGraphControl1.GraphPane;
// 画图面版标题
myPane.Title.Text = "收入统计";
// 画图面版X标题
myPane.XAxis.Title.Text = "区域";

myPane.XAxis.Scale.Min = 0;
//初始化数据
PointPairList list = new PointPairList();
PointPairList list2 = new PointPairList();
PointPairList list3 = new PointPairList();

for (int i = 0; i < 5; i++)////这里的数量要和lable的一致，比如横坐标显示了5个lable，这里就要给5个
{
list.Add(i, i+1);
list2.Add(i, i + 2);
list3.Add(i, i + 3);
}

// 画图面版Y标题
myPane.YAxis.Title.Text = "销售情况";
//柱的画笔
// public BarItem AddBar(string 名称, IPointList 数据, Color 颜色);

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);//渐变
// BarItem myCurve2 = myPane.AddBar("买农药", list2, Color.Red);
// myCurve2.Bar.Fill = new Fill(Color.Red, Color.White, Color.Red);
// BarItem myCurve3 = myPane.AddBar("买化肥", list3, Color.Green);
// myCurve3.Bar.Fill = new Fill(Color.Green, Color.White, Color.Green);

//myPane.XAxis.MajorTic.IsBetweenLabels = true;
//XAxis标注
string[] labels = { "产品1", "产品2", "产品3", "产品4", "产品5" };
myPane.XAxis.Scale.TextLabels = labels;
myPane.XAxis.Type = AxisType.Text;
//图区以外的颜色
// myPane.Fill = new Fill(Color.White, Color.FromArgb(200, 200, 255), 45.0f);
//背景颜色
// myPane.Chart.Fill = new Fill(Color.Red, Color.LightGoldenrodYellow, 45.0f);

zedGraphControl1.AxisChange();
zedGraphControl1.Refresh();
}