Private Sub Form7_Load(sender As Object, e As EventArgs) Handles MyBase.Load
Dim sqltxt As String
cn = New SqlConnection(lj)
sqltxt = "select 日期,水温,浊度 from yssj order by 日期"
da = New SqlDataAdapter(sqltxt, cn)
dt = New DataTable
da.Fill(dt)
Chart1.DataSource = dt
'Chart1.DataBind()
Chart1.Series(0).XValueMember = "日期"
Chart1.Series(0).YValueMembers = "水温"
Chart1.Series(1).XValueMember = "日期"
Chart1.Series(1).YValueMembers = "浊度"
End Sub
请教各位大神,上面这段代码在 Private Sub Form7_Load,可以实现上图的功能,但是同样的代码在Private Sub Button1_Click,想用按钮实现确没有反应,这是什么道理啊!!!!