鼠标悬停在饼图窗口中形式c#

Question

如何在饼图中显示数量，当我将光标悬停在饼图上时，我有此代码，但它不起作用。我是这个 C# 代码的新手

DataTable dt = new DataTable();
            conexion.Open();
            SqlDataAdapter da = new SqlDataAdapter("Select\r\ncount([referral_id]) as 'Count',\r\n[referral_type] as 'Type'\r\n\r\nfrom AlteryxDB.dbo.t_prd_pbixpipeline_crt2023\r\n\r\nwhere [ref_status]='Pending' and \r\n([recipient_eid] ='22216' and [referral_eid]='22216')\r\n\r\ngroup by\r\n[referral_type]", conexion);
            da.Fill(dt);
            chart3.DataSource = dt;
            conexion.Close();

            chart3.Series["Count"].XValueMember = "Type";
            chart3.Series["Count"].YValueMembers = "Count";

我尝试放

chart3.Series["Count"].labeltooltip = "Count"

Answer 1

属性名称有拼写错误。设置

tooltip

的正确属性是

ToolTip

。此外，您可能还需要

ToolTip

来显示。

您的代码的更新版本 -

DataTable dt = new DataTable();
conexion.Open();
SqlDataAdapter da = new SqlDataAdapter("SELECT COUNT([referral_id]) as 'Count', [referral_type] as 'Type' FROM AlteryxDB.dbo.t_prd_pbixpipeline_crt2023 WHERE [ref_status]='Pending' AND ([recipient_eid] ='22216' AND [referral_eid]='22216') GROUP BY [referral_type]", conexion);
da.Fill(dt);
conexion.Close();

chart3.DataSource = dt;
chart3.Series["Count"].XValueMember = "Type";
chart3.Series["Count"].YValueMembers = "Count";

chart3.Series["Count"].ToolTip = "#VALX: #VALY";

参考：ToolTip类