HtmlElementCollection Class

 

Defines a collection of HtmlElement objects.

Namespace:   System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

System.Object
  System.Windows.Forms.HtmlElementCollection

public sealed class HtmlElementCollection : ICollection, IEnumerable

NameDescription
System_CAPS_pubpropertyCount

Gets the number of elements in the collection.

System_CAPS_pubpropertyItem[Int32]

Gets an item from the collection by specifying its numerical index.

System_CAPS_pubpropertyItem[String]

Gets an item from the collection by specifying its name.

NameDescription
System_CAPS_pubmethodEquals(Object)

Determines whether the specified object is equal to the current object.(Inherited from Object.)

System_CAPS_pubmethodGetElementsByName(String)

Gets a collection of elements by their name.

System_CAPS_pubmethodGetEnumerator()

Returns an enumerator that iterates through a collection.

System_CAPS_pubmethodGetHashCode()

Serves as the default hash function. (Inherited from Object.)

System_CAPS_pubmethodGetType()

Gets the Type of the current instance.(Inherited from Object.)

System_CAPS_pubmethodToString()

Returns a string that represents the current object.(Inherited from Object.)

NameDescription
System_CAPS_pubinterfaceSystem_CAPS_privmethodICollection.CopyTo(Array, Int32)

This API supports the product infrastructure and is not intended to be used directly from your code. Copies the elements of the collection to an Array, starting at a particular Array index.

System_CAPS_pubinterfaceSystem_CAPS_privpropertyICollection.IsSynchronized

Gets a value indicating whether access to the HtmlElementCollection is synchronized (thread safe).

System_CAPS_pubinterfaceSystem_CAPS_privpropertyICollection.SyncRoot

This API supports the product infrastructure and is not intended to be used directly from your code. Gets an object that can be used to synchronize access to the collection.

NameDescription
System_CAPS_pubmethodAsParallel()

Overloaded. Enables parallelization of a query.(Defined by ParallelEnumerable.)

System_CAPS_pubmethodAsQueryable()

Overloaded. Converts an IEnumerable to an IQueryable.(Defined by Queryable.)

System_CAPS_pubmethodCast<TResult>()

Casts the elements of an IEnumerable to the specified type.(Defined by Enumerable.)

System_CAPS_pubmethodOfType<TResult>()

Filters the elements of an IEnumerable based on a specified type.(Defined by Enumerable.)

The following code example uses HtmlElementCollection objects to print out a textual representation of the Document Object Model (DOM) of a page.

private void PrintDomBegin()
{
	if (webBrowser1.Document != null)
	{
		HtmlElementCollection elemColl = null;
		HtmlDocument doc = webBrowser1.Document;
		if (doc != null)
		{
			elemColl = doc.GetElementsByTagName("HTML");
			String str = PrintDom(elemColl, new System.Text.StringBuilder(), 0);
			webBrowser1.DocumentText = str;
		}
	}
}

private string PrintDom(HtmlElementCollection elemColl, System.Text.StringBuilder returnStr, Int32 depth)
{
	System.Text.StringBuilder str = new System.Text.StringBuilder();

	foreach (HtmlElement elem in elemColl)
	{
		string elemName;

		elemName = elem.GetAttribute("ID");
		if (elemName == null || elemName.Length == 0)
		{
			elemName = elem.GetAttribute("name");
			if (elemName == null || elemName.Length == 0)
			{
				elemName = "<no name>";
			}
		}

		str.Append(' ', depth * 4);
		str.Append(elemName + ": " + elem.TagName + "(Level " + depth + ")");
		returnStr.AppendLine(str.ToString());

		if (elem.CanHaveChildren)
		{
			PrintDom(elem.Children, returnStr, depth + 1);
		}

		str.Remove(0, str.Length);
	}

	return(returnStr.ToString());
}

.NET Framework
Available since 2.0

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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