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GridColumn make visible = true

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Grid

This is a migrated thread and some comments may be shown as answers.

Dwayne Starkey asked on 26 Apr 2010, 07:01 PM

I have a radgird that will be displaying support tickets. Within the grid I am using the telerik:GridImageColumn to display either a green, yellow or red image.

I am current trying to achieve this with itemdatabound, using findcontrol. I keep getting an error “Object reference not set to an instance of an object.”. Can some let me know what I am doing wrong?

Thanks

(

TypeOf e.Item Is GridDataItem Then

Dim dataItem As GridDataItem = DirectCast(e.Item, GridDataItem)

Dim dataBoundItem As GridDataItem = e.Item

Dim calcdate As Date

Dim tsTimeSpan As TimeSpan

Dim iNumberOfDays As Integer

calcdate = dataItem.DataItem(

"SubmitDate")

tsTimeSpan = Now.Subtract(calcdate)

iNumberOfDays = tsTimeSpan.Days

If iNumberOfDays < 2 Then

dataBoundItem.FindControl(

"imggreen").Visible = True

ElseIf iNumberOfDays = 2 Then

dataBoundItem.FindControl(

"imgyellow").Visible = True

dataItem(

"SubmitDate").BackColor = Color.Yellow

ElseIf iNumberOfDays >= 3 Then

dataBoundItem.FindControl(

"imgred").Visible = True

dataItem("SubmitDate").BackColor = Color.Red

End If

)

1 Answer, 1 is accepted

answered on 26 Apr 2010, 08:10 PM

I got it....at least a work around

instead of using a radimagecolumn I used a radbutton column using the button type image. I then pass the image url in the itemdatabound depending on the days. Sample of what worked below.

    
                  If TypeOf e.Item Is GridDataItem Then  
        
                        Dim dataItem As GridDataItem = DirectCast(e.Item, GridDataItem)  
        
                        Dim dataBoundItem As GridDataItem = e.Item  
        
                        Dim calcdate As Date  
        
                        Dim tsTimeSpan As TimeSpan  
        
                        Dim iNumberOfDays As Integer  
        
                        calcdate = dataItem.DataItem("SubmitDate")  
        
                        tsTimeSpan = Now.Subtract(calcdate)  
        
                        iNumberOfDays = tsTimeSpan.Days  
        
                        Dim imgCol As GridImageColumn = DirectCast(RadGridGetTickets.MasterTableView.GetColumn("imgTT"), GridImageColumn)  
        
                        If iNumberOfDays < 2 Then  
        
                            CType(dataItem("BtnTTImg").Controls(0), ImageButton).ImageUrl = "~/CMSC-Images/Icons/helpdesk/green_alert.gif" 
        
                        ElseIf iNumberOfDays = 2 Then  
        
                            CType(dataItem("BtnTTImg").Controls(0), ImageButton).ImageUrl = "~/CMSC-Images/Icons/helpdesk/yellow_alert.png" 
        
                        ElseIf iNumberOfDays >= 3 Then  
        
                            CType(dataItem("BtnTTImg").Controls(0), ImageButton).ImageUrl = "~/CMSC-Images/Icons/helpdesk/red_alert.gif" 
        
                        Else  
        
                        End If  
        
                    End If