最近在學習如何使用在ASP.NET中使用Teechart圖表控件畫餅形圖、柱形圖，下面是做的示例的源碼，和大家分享一下

源碼如下：

private void Page_Load(object sender, System.EventArgs e)
{
// 在此處放置用戶代碼以初始化頁面

if(!Page.IsPostBack)
{
this.txtStart.Text =DateTime.Now.Year.ToString();
this.txtEnd.Text =DateTime.Now.Year.ToString();
int m=Convert.ToInt16(DateTime.Now.Month.ToString());
this.ddlEnd.SelectedIndex =m-1; //當前月份
}
if ((this.txtStart.Text=="")||(this.txtEnd.Text==""))
{
Response.Write("<script language='javascript'>alert('"+"年月份都不能為空！"+"')</script>");

return;
}
if (this.txtStart.Text==this.txtEnd.Text) //年份相等
{
if(Convert.ToInt16(this.ddlStart.SelectedItem.Text)>Convert.ToInt16(this.ddlEnd.SelectedItem.Text))
{
Response.Write("<script language='javascript'>alert('"+"起始年月應該不大于截至年月！"+"')</script>");
return;
}
}
if (Convert.ToInt16(this.txtStart.Text)>Convert.ToInt16(this.txtEnd.Text))
{
Response.Write("<script language='javascript'>alert('"+"起始年份應該不大于截至年份！"+"')</script>");
return;
}
this.DrawPie();
}

private void DrawPie()
{
WebChart1.Chart.Panel.Color = System.Drawing.Color.AliceBlue;
WebChart1.Chart.Legend.LegendStyle = Steema.TeeChart.LegendStyles.Auto;
WebChart1.Chart.Legend.Alignment = Steema.TeeChart.LegendAlignments.Bottom;
WebChart1.Chart.Legend.Inverted = true;
WebChart1.Chart.Legend.ShapeStyle = Steema.TeeChart.Drawing.TextShapeStyle.RoundRectangle;
WebChart1.Chart.Legend.Symbol.Visible = true;
WebChart1.Chart.Legend.Font.Color = System.Drawing.Color.DarkBlue;

WebChart1.Dispose();
string chartTitle = "公司機械租賃費示意圖";
WebChart1.Chart.Header.Text = chartTitle.Trim().ToString();
WebChart1.Chart.Axes.Left.Title.Text = "公司機械租賃費示意圖";

Steema.TeeChart.Styles.Pie Pie1 = new Steema.TeeChart.Styles.Pie();
WebChart1.Chart.Series.Add(Pie1);
DataSet dsall = DBSQL.GetDataSet("select 項目部編號,項目部,sum(租賃費) as 金額 from JX_TenancyBal where 單據類型=0 "+
" and 結算年度>='"+(this.txtStart.Text).Trim()+"'and 結算年度<='"+(this.txtEnd.Text).Trim()+"' and 結算月度>='"+this.ddlStart.SelectedItem.Text
+"' and 結算月度<='"+this.ddlEnd.SelectedItem.Text+"' group by 項目部編號,項目部");
Pie1.DataSource = dsall.Tables[0];
Pie1.YValues.DataMember = dsall.Tables[0].Columns[2].ToString();
Pie1.LabelMember = dsall.Tables[0].Columns[1].ToString();

WebChart1.DataBind();
}

private void btnDrawPie_Click(object sender, System.EventArgs e)
{
this.DrawPie();
}

private void DrawBar()
{
Steema.TeeChart.Styles.Bar Bar1 ;
DataSet DS = new DataSet();
WebChart1.Chart.Header.Text = "公司機械租賃費示意圖";
WebChart1.Chart.Axes.Left.Title.Text = "公司機械租賃費示意圖";
WebChart1.Dispose();
Bar1 = new Steema.TeeChart.Styles.Bar(WebChart1.Chart);
Bar1.ColorEach = true;
//WebChart1.Chart.Axes.Bottom.Title.Text = "公司機械租賃費示意圖";
string SelectStr ="select 項目部編號,項目部,sum(租賃費) as 金額 from JX_TenancyBal where 單據類型=0 "+
" and 結算年度>='"+(this.txtStart.Text).Trim()+"'and 結算年度<='"+(this.txtEnd.Text).Trim()+"' and 結算月度>='"+this.ddlStart.SelectedItem.Text
+"' and 結算月度<='"+this.ddlEnd.SelectedItem.Text+"' group by 項目部編號,項目部 order by 項目部編號";
DS.Clear();
try
{
DS = DBSQL.GetDataSet(SelectStr);
}
catch
{}
Bar1.DataSource = DS.Tables[0];
Bar1.YValues.DataMember = DS.Tables[0].Columns[2].ToString();
Bar1.LabelMember=DS.Tables[0].Columns[1].ToString();
WebChart1.DataBind();
}

private void Button2_Click(object sender, System.EventArgs e)
{
this.DrawBar();
}