Hello there.

I would like to add a MultiPageControl to a Custom Property next to other properties that make up the control. I'm having trouble in the CreateEditControls() override. I think a SetupControl() or some other method of the MultiPageControl needs to be called up. All I get is a "Object reference not set to an instance of an object".

There is little documentation on this. Does any one have a better idea of how to do this?

 

Thanks

Here's the code:

CustomPageListControl *************************************** 

public class CustomPageListControl : EPiServer.Web.PropertyControls.PropertyStringControl
{
#region Controls
protected System.Web.UI.WebControls.DropDownList listFormat;
protected EPiServer.Web.WebControls.InputPageReference link;
protected MultiPageControl multiPageCollection;
protected HtmlGenericControl divListControl = new HtmlGenericControl("div");
protected HtmlGenericControl divListFormat = new HtmlGenericControl("div");
protected HtmlGenericControl divLink = new HtmlGenericControl("div");
protected HtmlGenericControl divMulti = new HtmlGenericControl("div");
protected HtmlGenericControl brControl = new HtmlGenericControl("br");
#endregion

///
/// Gets a value indicating whether [supports on page edit].
///
/// true if [supports on page edit]; otherwise, false.
public override bool SupportsOnPageEdit
{
get
{
return false;
}
}

///
/// Inherited. Initialize the value of the TextBox control.
///
protected override void SetupEditControls()
{
var customPageList = SerializeUtils.DeserializeObject(this.ToString());

if (this.listFormat != null && customPageList.ListFormat != null)
{
this.listFormat.SelectedValue = customPageList.ListFormat.ToString();
}
if (this.link.PageLink != null && customPageList.Link != null)
{
this.link.PageLink = customPageList.Link;
}
if (this.multiPageCollection != null && customPageList.MultiPageCollection != null)
{
this.multiPageCollection.PropertyMultiPage.SelectedLinkItems = customPageList.MultiPageCollection;
}
}

///
/// Inherited. Applies changes for the posted data to the page's properties when the RenderType property
/// is set to Edit.
///
public override void ApplyEditChanges()
{
CustomPageListDetails customPageList = new CustomPageListDetails();

customPageList.ListFormat = (this.listFormat.SelectedValue != null) ? this.listFormat.SelectedValue : null;
customPageList.Link = (this.link.PageLink != null) ? this.link.PageLink : null;
customPageList.MultiPageCollection = (this.multiPageCollection.PropertyMultiPage != null) ? this.multiPageCollection.PropertyMultiPage.SelectedLinkItems : null;
//customPageList.MultiPageCollection = (this.multiPageCollection.PropertyMultiPage.SelectedLinkItems != null) ? this.multiPageCollection.PropertyMultiPage.SelectedLinkItems : null;

string obj = SerializeUtils.SerializeObject(customPageList);
base.SetValue(obj);
}

///
/// Creates the edit controls.
///
public override void CreateEditControls()
{
// create the table
Panel panel = new Panel();
panel.BorderStyle = BorderStyle.Solid;
panel.BorderWidth = 1;
this.Controls.Add(panel);
divListControl.Attributes.Add("style","padding:5px");
divListControl.Attributes.Add("id", "divListFormat");
panel.Controls.Add(divListControl);
divListControl.Controls.Add(divListFormat);

// create a cells
listFormat = new DropDownList() { ID = "listFormat"};
listFormat.Attributes.Add("onchange", "javascript:OnChange(this);");
HtmlGenericControl js = new HtmlGenericControl("script");
js.Attributes["type"] = "text/javascript";
js.Attributes["src"] = "/javascript/listformat.js";
this.Page.Header.Controls.Add(js);

string rawValues = System.Configuration.ConfigurationManager.AppSettings.Get("ListFormats");
string[] appSettingsValues = rawValues.Split(Convert.ToChar("|"));

for (int i = 0; i < appSettingsValues.Length; i++)
{
string[] appValues = appSettingsValues[i].Split(Convert.ToChar(";"));
listFormat.Items.Add(new ListItem(appValues[0], appValues[1]));
}

var labellistFormat = new System.Web.UI.WebControls.Label() { Text = "List Format" };
divListFormat.Controls.Add(labellistFormat);
divListFormat.Controls.Add(brControl);
divListFormat.Controls.Add(listFormat);

labellistFormat.AssociatedControlID = listFormat.ID;

// create a row Link ************************************
divLink.Attributes.Add("id", "divLink");
link = new EPiServer.Web.WebControls.InputPageReference() { ID = "link" };
var labellink = new System.Web.UI.WebControls.Label() { Text = "Link" };
divLink.Controls.Add(labellink);
divLink.Controls.Add(link);
divListControl.Controls.Add(divLink);
labellink.AssociatedControlID = link.ID;

// create a row Multi ************************************
divMulti.Attributes.Add("id", "divMulti");
multiPageCollection = new MultiPageControl() { ID = "multi" };

// Is something missing here like?
// multiPageCollection.SetupControl();

var labelMulti = new System.Web.UI.WebControls.Label() { Text = "Multi Page Collection" };
divMulti.Controls.Add(labelMulti);
divMulti.Controls.Add(brControl);
divMulti.Controls.Add(multiPageCollection);
divListControl.Controls.Add(divMulti);
labelMulti.AssociatedControlID = multiPageCollection.ID;

SetupEditControls();
}

///
/// Gets the CustomPageList instance for this IPropertyControl.
///
/// The property that is to be displayed or edited.
public CustomPageList CustomPageList
{
get
{
return PropertyData as CustomPageList;
}
}
}

CustomPageList *******************************************

[Serializable]
[PageDefinitionTypePlugIn(DisplayName = "Custom Page List", Description = "Allows editing of a complex element.")]
public class CustomPageList : EPiServer.Core.PropertyData
{
public override EPiServer.Core.PropertyData ParseToObject(string str)
{
// TODO: Write code that converts the string passed to the method into an instance of this type.
CustomPageList customPageList = new CustomPageList();
customPageList.ParseToSelf(str);
return customPageList;
}

public override void ParseToSelf(string str)
{
// TODO: Write code that converts the string passed to the method into property data and populate the current instance with this data.
this.String = str;
}

public override Type PropertyValueType
{
get
{
// TODO: Write code that returns the underlying type
return this.GetType();
}
}

protected override void SetDefaultValue()
{
// TODO: Write code that resets the value of this property to its default.
this.String = "";
}

public override EPiServer.Core.PropertyDataType Type
{
get
{
// TODO: Write code that returns the PropertyDataType this property is based on.
return PropertyDataType.LongString;
}
}

string _string;
///
/// Gets or sets the string value of this property.
///
[System.Xml.Serialization.XmlIgnore]
protected virtual string String
{
get
{
return this._string;
}
set
{
base.ThrowIfReadOnly();
if (PropertyData.QualifyAsNullString(value))
{
base.Clear();
}
else if ((this._string != value) || this.IsNull)
{
this._string = value;
base.Modified();
}
}
}

public override object Value
{
get
{
if (this.IsNull)
{
return null;
}
return this.String;
}
set
{
base.ThrowIfReadOnly();
base.SetPropertyValue(value,
delegate
{
this.String = value.ToString();
});
}
}

public override EPiServer.Core.IPropertyControl CreatePropertyControl()
{
return new CustomPageListControl();
}

}

CustomPageListDetails ***************************************

public class CustomPageListDetails
{
public string ListFormat { get; set; }
public PageReference Link { get; set; }
public MultipageLinkItemCollection MultiPageCollection { get; set; }

#region Helper Methods

///
/// Gets the promo from string.
///
///

The XML.
///
public static CustomPageListDetails GetSummaryFromString(string xml)
{
return SerializeUtils.DeserializeObject(xml);
}
///
/// Gets the promo from the CurrentPage.
///
/// Name of the property.
///
public static CustomPageListDetails GetSummaryFromPage(string PropertyName)
{
return GetSummaryFromPage(PropertyName, PageDateHelper.CurrentPage);
}
///
/// Gets the promo from page.
///
/// Name of the property.
/// The page.
///
public static CustomPageListDetails GetSummaryFromPage(string PropertyName, PageData page)
{
//Add Some caching functionality by placing in the
if ((page[PropertyName] != null) && !string.IsNullOrEmpty(page[PropertyName].ToString()))
{
string XMLstr = string.Empty;
var propname = page.PageLink.ID.ToString() + ":" + PropertyName;
if (System.Web.HttpContext.Current.Items[PropertyName] != null)
{
XMLstr = (string)System.Web.HttpContext.Current.Items[propname];
}
else
{
XMLstr = (string)page[PropertyName];
System.Web.HttpContext.Current.Items[propname] = XMLstr;
}
return GetSummaryFromString(XMLstr);

 

}
return new CustomPageListDetails();
}
#endregion
}