ADO opdatering af record

Vi kan bruge SQL's UPDATE til at opdatere en record i en database tabel.

Opdater database tabel record

Vi ønsker at opdatere en record i Northwind databasens Customers tabel. Først skal vi oprette en tabel, der viser alle records i Customers.

<html>
<body>
<%
set conn = Server.CreateObject("ADODB.Connection")
conn.Provider = "Microsoft.Jet.OLEDB.4.0"
conn.Open "c:/webdata/northwind.mdb"
set rs = Server.CreateObject("ADODB.Recordset")
rs.open "SELECT * FROM customers",conn
%>
<h2>List Database</h2>
<table border="1" width="100%">
<tr>
<%
for each x in rs.Fields
  response.write("<th>" & ucase(x.name) & "</th>")
next
%>
</tr>
<% do until rs.EOF %>
<tr>
<form method="post" action="demo_update.asp">
<%
for each x in rs.Fields
  if lcase(x.name)="customerid" then>
    <td>
    <input type="submit" name="customerID" value="<%=x.value%>">
    </td>
  <%else%>
    <td><%Response.Write(x.value)%></td>
  <%end if>
next
%>
</form>
<%rs.MoveNext%>
</tr>
<%
loop
conn.close
%>
</table>
</body>
</html>

Hvis brugeren klikker på knappen i "customerID"-kolonnen, åbnes en ny fil "demo_update.asp". Denne fil indeholder kildekoden til at oprette input-felter, der er baseret på felterne i databasen, og indeholder også en "Opdater"-knap til at gemme ændringer:

<html>
<body>
<h2>Opdater post</h2>
<%
set conn = Server.CreateObject("ADODB.Connection")
conn.Provider = "Microsoft.Jet.OLEDB.4.0"
conn.Open "c:/webdata/northwind.mdb"
cid = Request.Form("customerID")
if Request.form("companyname")="" then
  set rs = Server.CreateObject("ADODB.Recordset")
  rs.open "SELECT * FROM customers WHERE customerID='" & cid & "'", conn
  %>
  <form method="post" action="demo_update.asp">
  <table>
  <%for each x in rs.Fields%>
  <tr>
  <td><%=x.name%></td>
  <td><input name="<%=x.name%>" value="<%=x.value%>"></td>
  <%next%>
  </tr>
  </table>
  <br /><br />
  <input type="submit" value="Opdater post" />
  </form>
<%
else
  
  
  
  sql = sql & \
  sql=sql & "city='" & Request.Form("city") & "',"
  sql=sql & "postalcode='" & Request.Form("postalcode") & "',"
  sql=sql & "country='" & Request.Form("country") & "'"
  sql=sql & " WHERE customerID='" & cid & "'"
  on error resume next
  conn.Execute sql
  if err<>0 then
    response.write("Ingen opdateringsrettigheder!")
  else 
    response.write("Record " & cid & " blev opdateret!")
  end if 
end if
conn.close
%>
</body>
</html>