Web Forms :: ListBox Save To Database?
Feb 2, 2010
What is the standard practice for updating your listbox or combobox selections to a database lookup table?
Suppose you have a list of groups that an employee can be a member of. The user selects one or more groups and hits the save button. What is the best practice for updating the database?
Should I first DELETE all groups assigned to that user, in case they exist, and then INSERT the selected ones?
Or should I go through each list item and if it's not selected, DELETE it. If it is selected, check to see if it exists first, if so do nothing, if it doesn't INSERT it?
Or is there a better way to reconcile selections with the database table?
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[Code] ...
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[URL]
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[Code]....
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[Code]....
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Controller:
public ActionResult Create(int id)
{
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[AcceptVerbs(HttpVerbs.Post)]
public ActionResult Create(OperationOrder operationOrder,OperationProduct operationProduct)
{
try
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catch
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View:
<%: Html.ListBox("ProductId")%>
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I am designing a program that will let me enter the name of an item to swap and adds the swap to an array list when a button Add is pressed. Once the item is added to the array list a Sub Procedure should be called which displays the contents of the array list in a list box.
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Partial Class _Default
Inherits System.Web.UI.Page
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End Sub
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End Sub
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Dim SwapN0 As Integer
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Next
End Sub
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lstSwapList.Items.Remove(lstSwapList.SelectedValue)
End Sub
Protected Sub btnUpdateSwap_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnUpdateSwap.Click
End Sub
End Class
=======================================
Sub UpdateSwap(ByVal valueA As String, ByVal ValueBAs String, ByVal ValueC As Integer, ByVal ValueD As Date)
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