[Solved] Object reference not set to an instance of an object.

[L]

hi

I am having this error:
Object reference not set to an instance of an object.

This is my aspx code:

  <asp:DataList ID="DataList1" runat="server"
                        DataSourceID="sdsRoomSelect" RepeatColumns="7"
                        RepeatDirection="Horizontal">
                        <ItemTemplate>
                           <br />
                            <p/>
                            &nbsp;<asp:Button ID="Button1" CommandName="select" runat="server"  Text='<%# Eval("Room_No") %>' Width="50px" Height="50px" /> &nbsp;
                            <br />
                            <br />
                        </ItemTemplate>
                    </asp:DataList>

 This is my Code-Behind:

Protected Sub DataList1_ItemCommand(ByVal source As Object, ByVal e As System.Web.UI.WebControls.DataListCommandEventArgs) Handles DataList1.ItemCommand
        If e.CommandName = "select" Then
            Dim ddl As Button = TryCast(DataList1.FindControl("Button1"), Button)
            Dim strValue As String = ddl.Text
            Response.Cookies("roomno").Value = strValue
          End If
    End Sub

 Room No is not a primary key. How do I get the value of the room no when click?. Thanks

[Shinu]

Hello,

Give a try with following code in order to retrieve the text of clicked button in DataList.

VB:

Protected Sub DataList1_ItemCommand(ByVal source As Object, ByVal e As DataListCommandEventArgs)
    Dim item As DataListItem = DirectCast(e.Item, DataListItem)
    If e.CommandName = "select" Then
        Dim ddl As Button = TryCast(item.FindControl("Button1"), Button)
        Dim strValue As String = ddl.Text
        Response.Cookies("roomno").Value = strValue;
    End If
End Sub

-Shinu.