目前我只能为1系列生成图表类型列,这是未付款的。
在mySQL中,我有列名状态,它总是这三个值中的任何一个Unpaid / Paid / Finish。
如何计算每种状态(未付/付费/完成)的客户数量并将其添加到图表中?
Default.aspx的
<asp:Chart ID="Chart1" runat="server" Palette="EarthTones">
<Legends>
<asp:Legend Alignment="Center" Docking="Bottom" IsTextAutoFit="False" Name="Default" LegendStyle="Row" />
</Legends>
<series>
<asp:Series Name="Unpaid" XValueMember="MONTH(paymentDate)" YValueMembers="COUNT(status)" ShadowColor="#FF9900"></asp:Series>
</series>
<chartareas>
<asp:ChartArea Name="ChartArea1">
</asp:ChartArea>
</chartareas>
</asp:Chart>
Default.aspx.cs
protected void displayGraph()
{
string Up = "Unpaid";
string month = DateTime.Now.ToString("MMMM");
MySqlConnection con = new MySqlConnection("server=localhost;userid=root;password=;database=obsystem");
con.Open();
MySqlCommand cmd = new MySqlCommand("SELECT COUNT(status),MONTH(paymentDate) FROM monthlytracker WHERE status='" + Up + "'", con);
MySqlDataAdapter da = new MySqlDataAdapter(cmd);
DataTable dt = new DataTable();
da.Fill(dt);
Chart1.DataSource = dt;
Chart1.ChartAreas["ChartArea1"].AxisX.Title = "Payment Status";
Chart1.ChartAreas["ChartArea1"].AxisY.Title = "Amount";
Chart1.DataBind();
}
有人可以帮帮我吗?
先谢谢你。非常感谢帮助。
答案 0 :(得分:1)
将COUNT
替换为SUM
,如下所示:
SELECT
SUM(CASE WHEN status='unpaid' THEN 1 ELSE 0 END) as Unpaid
, SUM(CASE WHEN status='paid' THEN 1 ELSE 0 END) as Paid
, SUM(CASE WHEN status='finished' THEN 1 ELSE 0 END) as Finished
FROM monthlytracker
WHERE ... -- the filter condition
这将生成三列,其中包含每种付款状态的计数。