ObjectDataSource.Selected Event

ObjectDataSource .Selected Event
Occurs when a Select operation has completed.

Code
 1<form id="Form1" method="post" runat="server">
 2
 3    <asp:objectdatasource
 4      ID="ObjectDataSource1"
 5      runat="server"
 6      SelectMethod="GetFullNamesAndIDs"
 7      TypeName="Samples.AspNet.CS.EmployeeLogic" />
 8
 9    <p>
10    <asp:dropdownlist
11      ID="DropDownList1"
12      runat="server" 
13      DataSourceID="ObjectDataSource1"
14      DataTextField="FullName"
15      DataValueField="EmployeeID" 
16      AutoPostBack="True" 
17      AppendDataBoundItems="true">
18        <asp:ListItem Text="Select One" Value=""></asp:ListItem>
19    </asp:dropdownlist>
20    </p>
21
22    <asp:objectdatasource
23      ID="ObjectDataSource2"
24      runat="server"
25      SelectMethod="GetEmployee"
26      UpdateMethod="UpdateEmployeeAddress"
27      OnUpdating="EmployeeUpdating"
28      OnSelected="EmployeeSelected"
29      TypeName="Samples.AspNet.CS.EmployeeLogic" >
30      <SelectParameters>
31        <asp:ControlParameter ControlID="DropDownList1" DefaultValue="-1" Name="empID" />
32      </SelectParameters>
33    </asp:objectdatasource>
34
35    <asp:DetailsView
36        ID="DetailsView1"
37        runat="server"
38        DataSourceID="ObjectDataSource2" 
39        AutoGenerateRows="false"
40        AutoGenerateEditButton="true">  
41        <Fields>
42            <asp:BoundField HeaderText="Address" DataField="Address" />
43            <asp:BoundField HeaderText="City" DataField="City" />
44            <asp:BoundField HeaderText="Postal Code" DataField="PostalCode" />
45        </Fields>  
46    </asp:DetailsView>
47
48</form>

Code
 1public void EmployeeUpdating(object source, ObjectDataSourceMethodEventArgs e)
 2{
 3    DataContractSerializer dcs = new DataContractSerializer(typeof(Employee));
 4
 5    String xmlData = ViewState["OriginalEmployee"].ToString();
 6    XmlReader reader = XmlReader.Create(new StringReader(xmlData));
 7    Employee originalEmployee = (Employee)dcs.ReadObject(reader);
 8    reader.Close();
 9
10    e.InputParameters.Add("originalEmployee", originalEmployee);
11}
12
13public void EmployeeSelected(object source, ObjectDataSourceStatusEventArgs e)
14{
15    if (e.ReturnValue != null)
16    {
17        DataContractSerializer dcs = new DataContractSerializer(typeof(Employee));
18        StringBuilder sb = new StringBuilder();
19        XmlWriter writer = XmlWriter.Create(sb);
20        dcs.WriteObject(writer, e.ReturnValue);
21        writer.Close();
22
23        ViewState["OriginalEmployee"] = sb.ToString();
24    }
25}