Radchart click event not working as expected

[Pena]

Hello,

I would like to open a Pop up window when clicked on chart title.. I have used Javascript function to open the pop-up.

 

function ShowPopUpDialog() {
            window.open('Details.aspx', 'ChartDetails', 'height = 300px, width = 300px', true);
        }

  

 Here is the call to Javascript function from chart click event

  

 

Protected Sub RadChart2_Click(ByVal sender As Object, ByVal args As Telerik.Charting.ChartClickEventArgs) Handles RadChart2.Click
      Session("ChartReference") = "AccountSize"
      RadChart2.ChartTitle.ActiveRegion.Url = "javascript:ShowPopUpDialog();"
  End Sub

When I clicked on the chart Title the first time, I see that it is triggering a javascript:_doPostback event instead of my function... It works fine as expected from second click onwards..(after the postback)
Any help to resolve this behavior is appreciated

Thanks.

[Evgenia]

Hello Pena,

Why don't you use the server events we provide to open the pop-up? For example you can use the fact that Chart Title has ActiveRegion.Click event that you may wire to. For more information and samples - you can review our help topic as well as this online demo.

Greetings,
Evgenia
the Telerik team

[Pena]

Hi Evgenia,

I am still having the same issue after trying out the code in the links referred by you...

In the below code, as soon as I click the chart title,  I get the message box but I am NOT redirected to Details.aspx page..Instead my current page just refreshes as if it is doing a post back..

When clicked theChart title second time it works fine.. It appears that chart performs  a postback for the 1st click and then it works as expected..

So this does not seem to be related to using Javascript  A faster reply is appreciated as I am fighting with this issue for a while. Thanks.

 

 

Protected Sub RadChart2_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles RadChart2.Load

AddHandler RadChart2.ChartTitle.ActiveRegion.Click, AddressOf Region_Click

End Sub

Sub Region_Click(ByVal sender As Object, ByVal args As RegionClickEventArgs)

'Dim logFormat As String = "Item Class:{0} - ""{1}""" + Environment.NewLine

If TypeOf sender Is ChartTitle Then

Dim MyChart As ChartTitle = TryCast(sender, ChartTitle)

Dim logFormat As String = "Item Class:{0} - ""{1}""" + Environment.NewLine

If TypeOf sender Is ChartTitle Then

MsgBox([String].Format(logFormat, sender.[GetType]().Name, (TryCast(sender, ChartTitle)).TextBlock.Text))

RadChart2.ChartTitle.ActiveRegion.Url = "Details.aspx"

End If



End If

End Sub

 

[Missing User]

Hi Pena,

The described behavior occurs because you set the ChartTitle.ActiveRegion.Url after the region is clicked -- in ChartTitle.ActiveRegion.Click event. That is why on first click there is no url set for the ChartTitle active region and you are not redirected to the other page. You can set the ChartTitle.ActiveRegion.Url at an earlier stage, e.g. in RadChart.Load event:

Protected Sub RadChart2_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles RadChart2.Load
    RadChart2.ChartTitle.ActiveRegion.Url = "Details.aspx"
    AddHandler RadChart2.ChartTitle.ActiveRegion.Click, AddressOf Region_Click
End Sub

Sub Region_Click(ByVal sender As Object, ByVal args As RegionClickEventArgs)
    If TypeOf sender Is ChartTitle Then
        Dim MyChart As ChartTitle = TryCast(sender, ChartTitle)
        Dim logFormat As String = "Item Class:{0} - ""{1}""" + Environment.NewLine

        If TypeOf sender Is ChartTitle Then
            MsgBox([String].Format(logFormat, sender.[GetType]().Name, (TryCast(sender, ChartTitle)).TextBlock.Text))
        End If
    End If
End Sub

I hope this helps.

All the best,

Polina

the Telerik team