I am using UltraWebGrid in my project. The requirement is that I need to attach a function for onclick event to only those cells which have a value in it and this can be done only from code-behind. But I'm unable to find a solution for this. I tried finding "Attributes.Add" for a cell from code-behind to attach a function on "onclick" event of the cell but there's no "Attributes" property for a cell.
Please suggest how can I attach the "onclick" event to only the desired cell through code-behind in a WebGrid.
RegardsAnuj
Anuj,
I assume that you're using a grid column whose Type is set to Button.
You have two options here that I can see.
One option is to use a templated column with buttons, rather than using a column with its Type set to Button. You can then establish client-side event handlers to each button independently, or not establish them at all, as you choose. This approach gives you the most control, at the cost of a significant amount of work to code and a likely decrease in performance (compared to not using a templated column). If you're already using a templated column, then this is the approach I would recommend.
The other option is to add logic to the ClickCellButton client-side event handler to selectively take action based on conditions with respect to the cell whose button was clicked. For instance, you can choose to take action when another cell in the same row as the one whose button was clicked contains a value. In this manner, the ClickCellButton event is still raised for all buttons, yet your logic still occurs only when it needs to occur. If you're not using a templated column, then this is the approach I most recommend.
Private Sub UWGIndicatorCountryView_InitializeRow(ByVal sender As Object, ByVal e As Infragistics.WebUI.UltraWebGrid.RowEventArgs) Handles UWGIndicatorCountryView.InitializeRow For Index As Integer = 1 To Me.UWGIndicatorCountryView.Bands(0).Columns.Count - 1 If Index Mod 3 = 0 Then If Not String.IsNullOrEmpty(e.Row.Cells(Index).Text) Then Dim status As String = e.Row.Cells(Index).Text Dim color As String = GetLegendColor(status) Here's the condition based on which I'm setting the color of the cell and here I want to attach the "onclick" event on this particular cell e.Row.Cells(Index - 1).Style.BackColor = System.Drawing.ColorTranslator.FromHtml(color) Now if I would've been using ASP.Net Gridview then I would've been able to attach "onclick" event to the cell as follows: e.Row.Cells(Index-1).Attributes.Add("onclick","ShowDataValue('" & status & "');") But here I'm using Infragistics WebGrid and it doesn't expose Attributes property for a cell. Now can you please suggest some workaround which can help me in achieving the same functionality desired as explained above? End If End If Next If e.Row.Band.Index = 1 Then For Index As Integer = 4 To Me.UWGIndicatorCountryView.Bands(1).Columns.Count - 1 Step 3 If Not String.IsNullOrEmpty(e.Row.Cells(Index).Text) Then Dim status As String = e.Row.Cells(Index).Text Dim color As String = GetLegendColor(status) e.Row.Cells(Index - 1).Style.BackColor = System.Drawing.ColorTranslator.FromHtml(color) End If Next End If End Sub
techieanuj said:Now can you please suggest some workaround which can help me in achieving the same functionality desired as explained above?