Question

I have a dataset, How can I use the below code to bind the radchart by using the below Original code?

Partial Public Class Chart_Examples_Skinning_Bars_DefaultCS
    Inherits System.Web.UI.Page
    Protected Sub Page_Load(sender As Object, e As EventArgs)
        If Not Page.IsPostBack Then
            Dim series As New ChartSeries()
            series.Type = ChartSeriesType.Bar
            series.DataXColumn = "XValue"
            series.DataYColumn = "YValue"

            CapacityRadChart.Series.Add(series)

            CapacityRadChart.DataSource = Me.GetDataSource()
            CapacityRadChart.DataBind()
        End If
    End Sub

    Private Function GetDataSource() As List(Of Class1)
        Dim r As New Random()
        Dim source As List(Of Class1) = New List(Of Class1)

        For i As Integer = 0 To 399
            Dim item As New Class1()

            item.XValue = i
            item.YValue = r.[Next](0, 100)

            source.Add(item)
        Next

        Return source
    End Function

End Class

I’m doing it in this way, But it is throwing the following error:

the type of column with “COUNT” is not numeric”.

Please could you suggest appropriate code?

Dim dt As DataTable = ds.Tables.Item(0)
Dim dr As DataRow
Dim listdata As new List(Of Double)

Dim list As New List(Of DataRow)(dt.[select]())
    For Each dr  In dt.Rows            
            list.Add(dr.ToLis)
    Next

Dim series As New ChartSeries()
series.Type = ChartSeriesType.Bar
    series.DataXColumn  = "CapacityDelay"
    series.DataYColumn = "COUNT"

    BaselineRadChart.Clear()
    BaselineRadChart.Series.Add(series)

    BaselineRadChart.DataSource = list
    BaselineRadChart.DataBind()

Answer 1

How do you create a columns in ds.Tables.Item(0)? Do you bind the DataTable directly from database or create the DataTable manually?

If you create it manually, then you may need to declare the DataType for the DataColumn

Dim dt As DataTable
dt.Columns.Add("CapacityDelay", System.Type.GetType("System.String"))
dt.Columns.Add("Count", System.Type.GetType("System.Int32"))