/// <summary>
/// Handles the data binding.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="T:System.EventArgs"/> instance containing the event data.</param>
private void HandleDataBinding( object sender, EventArgs e )
{
Control ctrl = (Control)sender;
object val = GetValue( ctrl.NamingContainer ) ?? string.Empty;
if ( data == null )
{
//Cache the data from the DataSourceControl, so that we only get the data once. If
//we just set the DataSourceID on the dropdown, the select command would get called
//once for each row.
DataSourceControl dsc = this.Control.NamingContainer.FindControl( this.DataSourceID ) as DataSourceControl;
DataSourceView dsv = ( (IDataSource)dsc ).GetView( "DefaultView" );
dsv.Select( DataSourceSelectArguments.Empty, new DataSourceViewSelectCallback( this.DataSourceCallback ) );
}
if ( ctrl is EntityDropDownList )
{
EntityDropDownList eddl = (EntityDropDownList)ctrl;
eddl.DataTextField = this.DataTextField;
eddl.DataValueField = this.DataValueField;
eddl.DataSource = this.data;
eddl.AppendNullItem = this.AppendNullItem;
}
else if ( ctrl is Label )
{
Label label = (Label)ctrl;
EntityDropDownList temp = new EntityDropDownList();
temp.DataTextField = this.DataTextField;
temp.DataValueField = this.DataValueField;
temp.DataSource = this.data;
temp.Visible = false;
temp.AppendNullItem = this.AppendNullItem;
label.Controls.Add( temp );
temp.DataBind();
label.Text = String.Empty;
foreach ( ListItem listItem in temp.Items )
{
if ( 0 == String.Compare( listItem.Value, val.ToString() ) )
{
label.Text = listItem.Text;
}
}
}
}
/// <summary>
/// Initializes the specified <see cref="T:System.Web.UI.WebControls.TableCell"></see> object to the specified row state.
/// </summary>
/// <param name="cell">The <see cref="T:System.Web.UI.WebControls.TableCell"></see> to initialize.</param>
/// <param name="rowState">One of the <see cref="T:System.Web.UI.WebControls.DataControlRowState"></see> values.</param>
protected override void InitializeDataCell(DataControlFieldCell cell, DataControlRowState rowState)
{
if((!this.ReadOnly && (0!= (rowState & DataControlRowState.Edit)))
|| 0 != (rowState & DataControlRowState.Insert))
{
EntityDropDownList eddl = new EntityDropDownList();
eddl.ToolTip = this.HeaderText;
eddl.AppendNullItem = this.AppendNullItem;
if (!String.IsNullOrEmpty(this.DataField) && 0 != (rowState & DataControlRowState.Edit))
{
eddl.DataBinding += new EventHandler(HandleDataBinding);
eddl.DataBound += new EventHandler(HandleDataBound);
}
cell.Controls.Add(eddl);
}
else if (!String.IsNullOrEmpty(this.DataField))
{
Label label = new Label();
label.DataBinding += new EventHandler(HandleDataBinding);
cell.Controls.Add(label);
}
}
