Asp.Net VB – Listview – ItemCommand – DataKeys – CommandName – SQL

Asp.Net VB - Listview - ItemCommand - DataKeys - CommandName - SQL

Here is a basic Listview that has an ItemCommand and ItemDataBound:

Frontend Code:

<asp:ListView ID="lvAddresses" runat="server" DataKeyNames="AddressID,BillingAddressID,ShippingAddressID">
        <LayoutTemplate>
            <asp:PlaceHolder ID="itemPlaceholder" runat="server"></asp:PlaceHolder>
        </LayoutTemplate>
        <ItemTemplate>
            <table class="noborder address_book" cellpadding="0" cellspacing="0"><tbody>
                <tr>
                    <td colspan="2">
                        <%#DataBinder.Eval(Container.DataItem, "FirstName")%> <%#DataBinder.Eval(Container.DataItem, "LastName")%><br>
                        <%#DataBinder.Eval(Container.DataItem, "Address1")%><br>
                        <%#DataBinder.Eval(Container.DataItem, "City")%>, <%#DataBinder.Eval(Container.DataItem, "State")%>, <%#DataBinder.Eval(Container.DataItem, "Zip")%><br>
                        <%#DataBinder.Eval(Container.DataItem, "Phone")%><br>
                        <span class="caption"><asp:LinkButton ID="lnkMakeDefault_Billing" CommandName="MakeDefault_Billing" runat="server">Click to make Default Billing Address</asp:LinkButton></span>
                        <span class="caption"><asp:Literal ID="litMakeDefault_Billing" runat="server" Text="Default Billing Address"></asp:Literal></span>
                        <br />
                        <span class="caption"><asp:LinkButton ID="lnkMakeDefault_Shipping" CommandName="MakeDefault_Shipping" runat="server">Click to make Default Shipping Address</asp:LinkButton></span>
                        <span class="caption"><asp:Literal ID="litMakeDefault_Shipping" runat="server" Text="Default Shipping Address"></asp:Literal></span>
                    </td>
                </tr>
                <tr>
                    <td>
                        <asp:Button ID="Button1" runat="server" Text="EDIT" CommandName="EDITAddress"/>
                    </td>
                    <td>
                        <asp:Button ID="btnREMOVE" runat="server" Text="REMOVE" CommandName="REMOVEAddress"/>
                    </td>
                </tr>
            </tbody></table>
 
        </ItemTemplate>
    </asp:ListView>

Backend Code:

Protected Sub Page_PreRender(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.PreRender
 
        FindIt()
 
    End Sub
    Private Sub FindIt()
 
        lblAddresses.Text = ""
 
        Dim sqlDataConnection As System.Data.SqlClient.SqlConnection = CDataAccess.OpenDatabase
        Dim conStr As String = sqlDataConnection.ConnectionString
        sqlDataConnection.Close()
 
        Dim selectCommand As String = "SELECT Address.*, Customer.BillingAddressID, Customer.ShippingAddressID"
        selectCommand &= " FROM Address INNER JOIN Customer ON Address.CustomerID = Customer.CustomerID"
        selectCommand &= " WHERE Address.CustomerID = @CustomerID AND Address.Deleted = 0"
 
        Dim sds As New SqlDataSource()
        sds.ConnectionString = conStr
        sds.SelectParameters.Clear()
 
        sds.SelectParameters.Add("CustomerID", 12345)
        sds.SelectCommand = selectCommand
 
        lvAddresses.DataSource = sds
        lvAddresses.DataBind()
    End Sub
 
    Protected Sub lvAddresses_ItemCommand(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.ListViewCommandEventArgs) Handles lvAddresses.ItemCommand
        Dim dataItem As ListViewDataItem = e.Item
        Dim currentDataKey As DataKey = lvAddresses.DataKeys(dataItem.DataItemIndex)
        Dim AddressID As Integer = currentDataKey("AddressID")
        Dim BillingAddressID As Integer = currentDataKey("BillingAddressID")
        Dim ShippingAddressID As Integer = currentDataKey("ShippingAddressID")
 
        'MakeDefault_Billing
        'MakeDefault_Shipping
        'EDITAddress
        'REMOVEAddress
        If String.Equals(e.CommandName, "MakeDefault_Billing") Then
            MakeDefault(AddressID, True)
        ElseIf String.Equals(e.CommandName, "MakeDefault_Shipping") Then
            MakeDefault(AddressID, False)
        ElseIf String.Equals(e.CommandName, "EDITAddress") Then
            EditAddress(AddressID)
        ElseIf String.Equals(e.CommandName, "REMOVEAddress") Then
            RemoveAddress(AddressID)
        End If
    End Sub
 
    Protected Sub lvAddresses_ItemDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.ListViewItemEventArgs) Handles lvAddresses.ItemDataBound
        Dim dataItem As ListViewDataItem = e.Item
 
        If e.Item.ItemType = ListViewItemType.DataItem Then
            Dim currentDataKey As DataKey = lvAddresses.DataKeys(dataItem.DataItemIndex)
            Dim AddressID As Integer = currentDataKey("AddressID")
            Dim BillingAddressID As Integer = currentDataKey("BillingAddressID")
            Dim ShippingAddressID As Integer = currentDataKey("ShippingAddressID")
            lit = e.Item.FindControl("litMakeDefault_Billing")
            Dim lit2 As Literal = e.Item.FindControl("litMakeDefault_Shipping")
            lnk = e.Item.FindControl("lnkMakeDefault_Billing")
            Dim lnk2 As LinkButton = e.Item.FindControl("lnkMakeDefault_Shipping")
 
            lit.Visible = Not lnk.Visible
        End If
 
    End Sub