CatalogPartCollection.Item Property (Int32)


Gets or sets a member of the collection, based on its position in the collection.

Namespace:   System.Web.UI.WebControls.WebParts
Assembly:  System.Web (in System.Web.dll)

public CatalogPart this[
	int index
] { get; }


Type: System.Int32

The index of a particular CatalogPart in the collection.

Property Value

Type: System.Web.UI.WebControls.WebParts.CatalogPart

A CatalogPart at the specified index in the collection.

The Item indexer allows you to access the underlying CatalogPart controls in a CatalogPartCollection object by index, and change their property values or call methods.

The following code example demonstrates how you can access a member of a CatalogPartCollection object using its index. For the full code required to run the example, see the Example section of the CatalogPartCollection class overview topic.

The code in the Button1_Click method creates a new CatalogPartCollection object named myParts. Note that the method uses the Item indexer to retrieve information from the first member of the collection.

protected void Button1_Click(object sender, EventArgs e)
  ArrayList list = new ArrayList(2);
  // Pass an ICollection object to the constructor.
  CatalogPartCollection myParts = new CatalogPartCollection(list);
  foreach (CatalogPart catalog in myParts)
    catalog.Description = "My " + catalog.DisplayTitle;

  // Use the IndexOf property to locate a CatalogPart control.
  int PageCatalogPartIndex = myParts.IndexOf(PageCatalogPart1);
  myParts[PageCatalogPartIndex].ChromeType = PartChromeType.TitleOnly;

  // Use the Contains method to see if a CatalogPart control exists.
  if (myParts.Contains(PageCatalogPart1))
    WebPart closedWebPart = null;
    WebPartDescriptionCollection descriptions = PageCatalogPart1.GetAvailableWebPartDescriptions();
    if (descriptions.Count > 0)
      closedWebPart = PageCatalogPart1.GetWebPart(descriptions[0]);
      closedWebPart.AllowClose = false;

  // Use indexers to display the details of the CatalogPart controls.
  Label1.Text = String.Empty;
  Label1.Text =
    "<h3>PageCatalogPart Details</h3>" +
    "ID: " + myParts[0].ID + "<br />" +
    "Count: " + myParts[0].GetAvailableWebPartDescriptions().Count;
  Label1.Text += 
    "<h3>DeclarativeCatalogPart Details</h3>" +
    "ID: " + myParts["DeclarativeCatalogPart1"].ID + "<br />" +
    "Count: " + myParts["DeclarativeCatalogPart1"].GetAvailableWebPartDescriptions().Count;

When you load the page in a browser, you can switch the page into catalog mode by selecting Catalog in the Display Mode drop-down list control. Clicking the Display CatalogPart Properties button accesses the CatalogPartCollection object and displays certain properties of the contained CatalogPart controls. The count of available server controls within the PageCatalogPart control is obtained by using the Item indexer in the Button1_Click method.

.NET Framework
Available since 2.0
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