July 21, 2011 05:33 by
ScottThis post requires to create a Silverlight Business Application in Visual Studio 2010.
1. Open the Mainpage.xaml , Add the following XAML code to see the Save changes and Reject changes button
1: <Button Content="Save Changes" Click="SaveButton_Click"
Margin="5"
2: x:Name="SaveButton"></Button>
3: <Button Content="Reject Changes" Click="RejectButton_Click"
Margin="5"
4: x:Name="RejectButton"></Button>
5: <TextBlock x:Name="ChangeText" VerticalAlignment="Center"
Width="Auto"></TextBlock>
2. Add the code for button click event handlers as shown below
1: private void SaveButton_Click(object sender, RoutedEventArgs e)
2: {
3: awDept.SubmitChanges(OnSubmitCompleted, null);
4: }
5:
6: private void RejectButton_Click(object sender, RoutedEventArgs e)
7: {
8: awDept.RejectChanges();
9: CheckChanges();
10: }
11: private void CheckChanges()
12: {
13: EntityChangeSet changeSet = awDept.EntityContainer.GetChanges();
14: ChangeText.Text = changeSet.ToString();
15: bool hasChanges = awDept.HasChanges;
16: SaveButton.IsEnabled = hasChanges;
17: RejectButton.IsEnabled = hasChanges;
18: }
19:
20: private void OnSubmitCompleted(SubmitOperation so)
21: {
22: if (so.HasError)
23: {
24: MessageBox.Show(string.Format("Submit Failed: {0}", so.Error.Message));
25: so.MarkErrorAsHandled();
26: }
27: CheckChanges();
28: }
29: private void departmentDataGrid_RowEditEnded(object sender,
DataGridRowEditEndedEventArgs e)
30: {
31: CheckChanges();
32: }
3. Open the Metadata file in server project and add the editable attribute to the Id and modified date as shown below
1: internal sealed class DepartmentMetadata
2: {
3:
4: // Metadata classes are not meant to be instantiated.
5: private DepartmentMetadata()
6: {
7: }
8:
9: [Editable(false)]
10: public short DepartmentID { get; set; }
11:
12: public string GroupName { get; set; }
13: [Editable(false)]
14: public DateTime ModifiedDate { get; set; }
15:
16: public string Name { get; set; }
17: }
4. When you run the application you should be able to see the below screen
