private void SaveWebpartPropertyButton_Click(object sender, RoutedEventArgs e)
{
string key = PropertiesLabel.Content.ToString();
string value = ValueTextBox.Text;
SPWebpart webpart = ((TreeViewItem)WebpartsTreeView.SelectedItem).Tag as SPWebpart;
SharePointService sharePointService = new SharePointService();
sharePointService.SaveWebpartProperty(this.SiteSetting, this.FileLeafRef, webpart.ID, key, value);
DataRowView selectedRow = (DataRowView)ResultGrid.SelectedItem;
selectedRow["Value"] = value;
webpart.Properties[key] = value;
}