I have an Access database with items from a collection stored in it. Each item is in one of four catagories and the datagrid shows the items in a specific catagory based on a drop down list selection. Sometimes there won't be anything in a specific catagory like "For Sale" and I don't want to show a datagrid header with nothing in the datagrid (this is what my page is doing now). I am coding everything by hand; I don't use VS.NET.
Here is my function which is part of a namespace that I have compiled:
Code:
Public Function GetBalisongList(strStatus as string, strSort as string) as Dataset
If strStatus = "complete" Then
strSQL = "SELECT BalisongID, make, model, status FROM balisong ORDER BY " & strSort
Else
strSQL = "SELECT BalisongID, make, model, status FROM balisong WHERE status = '" & strStatus & "' ORDER BY " & strSort
End If
Dim objConnection as New OLEDBConnection(m_DSN)
Dim objDataAdapter as New OLEDBDataAdapter(strSQL, objConnection)
Dim BalisongList as new Dataset()
objDataAdapter.Fill(BalisongList)
Return BalisongList
End Function
Here is the sub that handles the drop down list in my code behind page:
Code:
Public Sub balisongfilter(sender as object, e as eventargs)
ViewState("status") = ddl_balisong.SelectedItem.Value
If ViewState("status") = "description" Or ViewState("status") = "" Then
lblinstructions.visible = true
dgBalisongList.visible = false
rptBalisongDetails.visible = false
Else
strSort = "make, model"
Dim BalisongStatusList as new Balisong(strconnect)
dgBalisongList.DataSource = BalisongStatusList.GetBalisongList(ViewState("status"), strSort)
dgBalisongList.DataBind()
lblinstructions.visible = false
dgbalisonglist.visible = true
rptBalisongDetails.visible = false
End If
End Sub
I am trying to display an asp:label saying something like, "I do not currently have any balisongs for sale." instead of an empty datagrid. Thank you in advance for any help you can provide.
Handling an empty dataset
