/// <summary>
/// Fills the specified <see cref="T:System.Collections.IDictionary"></see> object with the values from the specified <see cref="T:System.Web.UI.WebControls.TableCell"></see> object.
/// </summary>
/// <param name="dictionary">A <see cref="T:System.Collections.IDictionary"></see> used to store the values of the specified cell.</param>
/// <param name="cell">The <see cref="T:System.Web.UI.WebControls.TableCell"></see> that contains the values to retrieve.</param>
/// <param name="rowState">One of the <see cref="T:System.Web.UI.WebControls.DataControlRowState"></see> values.</param>
/// <param name="includeReadOnly">true to include the values of read-only fields; otherwise, false.</param>
public override void ExtractValuesFromCell(System.Collections.Specialized.IOrderedDictionary dictionary, DataControlFieldCell cell, DataControlRowState rowState, bool includeReadOnly)
{
if (cell.HasControls() &&
cell.Controls[0] is EntityDropDownList)
{
EntityDropDownList eddl = (EntityDropDownList)cell.Controls[0];
dictionary[this.DataField] = String.IsNullOrEmpty(eddl.SelectedValue) ? null : eddl.SelectedValue;
}
}
/// <summary>
/// Handles the data bound.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="T:System.EventArgs"/> instance containing the event data.</param>
private void HandleDataBound(object sender, EventArgs e)
{
Control ctrl = (Control)sender;
object val = GetValue(ctrl.NamingContainer) ?? string.Empty;
EntityDropDownList eddl = ctrl as EntityDropDownList;
if (null != eddl)
{
//make sure the appropriate value is selected
ListItem listItem = eddl.Items.FindByValue(val.ToString());
if (null != listItem)
{
listItem.Selected = true;
}
}
}
/// <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);
}
}