# ListView\.SelectedListViewItemCollection

Namespace: **Wisej.Web**

Assembly: **Wisej.Framework** (4.0.0.0)

Represents the collection that contains the selected items in a [ListView](/api/wisej.web/lists-and-grids/listview.md) control.

{% tabs %}
{% tab title="C#" %}

```csharp
public class SelectedListViewItemCollection : IList<ListViewItem>, ICollection<ListViewItem>, IEnumerable<ListViewItem>, IEnumerable, IList, ICollection
```

{% endtab %}

{% tab title="VB.NET" %}

```visual-basic
Public Class SelectedListViewItemCollection
    Inherits IList(Of ListViewItem)
    Implements ICollection(Of ListViewItem), IEnumerable(Of ListViewItem), IEnumerable, IList, ICollection
```

{% endtab %}
{% endtabs %}

## Constructors

### ![](/files/hsR4ok3152WyAf8J2C1u) SelectedListViewItemCollection(owner)

Initializes a new instance of the [SelectedListViewItemCollection](/api/wisej.web/lists-and-grids/listview/wisej.web.listview.selectedlistviewitemcollection.md) class.

| Name      | Type                                                   | Description                                                                                |
| --------- | ------------------------------------------------------ | ------------------------------------------------------------------------------------------ |
| **owner** | [ListView](/api/wisej.web/lists-and-grids/listview.md) | A [ListView](/api/wisej.web/lists-and-grids/listview.md) control that owns the collection. |

## Properties

### ![](/files/hsR4ok3152WyAf8J2C1u) Count

[Int32](https://docs.microsoft.com/dotnet/api/system.int32): Returns the number of items in the collection.

### ![](/files/hsR4ok3152WyAf8J2C1u) IsReadOnly

[Boolean](https://docs.microsoft.com/dotnet/api/system.boolean): Returns whether the collection is read-only.

### ![](/files/hsR4ok3152WyAf8J2C1u) Item(index)

[ListViewItem](/api/wisej.web/lists-and-grids/listview/wisej.web.listviewitem.md): Returns the item value at the specified index within the collection.

**Throws:**

* [ArgumentOutOfRangeException](https://docs.microsoft.com/dotnet/api/system.argumentoutofrangeexception) The *index* parameter is less than 0 or greater than or equal to the value of the [Count](#count) property of [SelectedListViewItemCollection](/api/wisej.web/lists-and-grids/listview/wisej.web.listview.selectedlistviewitemcollection.md).

### ![](/files/hsR4ok3152WyAf8J2C1u) Item(key)

[ListViewItem](/api/wisej.web/lists-and-grids/listview/wisej.web.listviewitem.md): Returns the item with the specified key within the collection.

## Methods

### ![](/files/hsR4ok3152WyAf8J2C1u) Add(item)

Adds the specified *item* in the [Items](/api/wisej.web/lists-and-grids/listview.md#items) collection to the [SelectedItems](/api/wisej.web/lists-and-grids/listview.md#selecteditems) collection.

| Parameter | Type                                                                              | Description                                                                                                                                                                              |
| --------- | --------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **item**  | [ListViewItem](/api/wisej.web/lists-and-grids/listview/wisej.web.listviewitem.md) | The item in the [Items](/api/wisej.web/lists-and-grids/listview.md#items) collection to add to the [SelectedItems](/api/wisej.web/lists-and-grids/listview.md#selecteditems) collection. |

**Returns:** [Int32](https://docs.microsoft.com/dotnet/api/system.int32). The new count of selected items.

**Throws:**

* [ArgumentNullException](https://docs.microsoft.com/dotnet/api/system.argumentnullexception) *item* is null.
* [ArgumentException](https://docs.microsoft.com/dotnet/api/system.argumentexception) *item* doesn't belongs to a different [ListView](/api/wisej.web/lists-and-grids/listview.md).

### ![](/files/hsR4ok3152WyAf8J2C1u) Clear()

Clears the selection.

### ![](/files/hsR4ok3152WyAf8J2C1u) Contains(item)

Determines whether the specified item is located in the collection.

| Parameter | Type                                                                              | Description                                                                                                        |
| --------- | --------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------ |
| **item**  | [ListViewItem](/api/wisej.web/lists-and-grids/listview/wisej.web.listviewitem.md) | The [ListViewItem](/api/wisej.web/lists-and-grids/listview/wisej.web.listviewitem.md) to locate in the collection. |

**Returns:** [Boolean](https://docs.microsoft.com/dotnet/api/system.boolean). true if the specified index from the [ListViewItemCollection](/api/wisej.web/lists-and-grids/listview/wisej.web.listview.listviewitemcollection.md) for the [ListView](/api/wisej.web/lists-and-grids/listview.md) is an item in the collection; otherwise, false.

### ![](/files/hsR4ok3152WyAf8J2C1u) ContainsKey(key)

Determines if an item with the specified key is contained in the collection.

| Parameter | Type                                                          | Description                         |
| --------- | ------------------------------------------------------------- | ----------------------------------- |
| **key**   | [String](https://docs.microsoft.com/dotnet/api/system.string) | The name of the item to search for. |

**Returns:** [Boolean](https://docs.microsoft.com/dotnet/api/system.boolean). true if an item with the specified key is contained in the collection; otherwise, false.

### ![](/files/hsR4ok3152WyAf8J2C1u) GetEnumerator()

Returns an enumerator that can be used to iterate through the checked index collection.

**Returns:** [IEnumerator\<ListViewItem>](https://docs.microsoft.com/dotnet/api/system.collections.generic.ienumerator-1). An [IEnumerator](https://docs.microsoft.com/dotnet/api/system.collections.ienumerator) that represents the checked index collection.

### ![](/files/hsR4ok3152WyAf8J2C1u) IndexOf(item)

Returns the index within the [SelectedListViewItemCollection](/api/wisej.web/lists-and-grids/listview/wisej.web.listview.selectedlistviewitemcollection.md) of the specified item.

| Parameter | Type                                                                              | Description                                                                                                        |
| --------- | --------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------ |
| **item**  | [ListViewItem](/api/wisej.web/lists-and-grids/listview/wisej.web.listviewitem.md) | The [ListViewItem](/api/wisej.web/lists-and-grids/listview/wisej.web.listviewitem.md) to locate in the collection. |

**Returns:** [Int32](https://docs.microsoft.com/dotnet/api/system.int32). The zero-based index in the collection; otherwise, -1 if the item is not located in the collection.

### ![](/files/hsR4ok3152WyAf8J2C1u) IndexOfKey(key)

Determines the index of an item with the specified key.

| Parameter | Type                                                          | Description                                     |
| --------- | ------------------------------------------------------------- | ----------------------------------------------- |
| **key**   | [String](https://docs.microsoft.com/dotnet/api/system.string) | The name of the item to retrieve the index for. |

**Returns:** [Int32](https://docs.microsoft.com/dotnet/api/system.int32). The zero-based index for the [ListViewItem](/api/wisej.web/lists-and-grids/listview/wisej.web.listviewitem.md) with the specified name, if found; otherwise, -1.

### ![](/files/hsR4ok3152WyAf8J2C1u) Remove(item)

Removes the *item* in the [Items](/api/wisej.web/lists-and-grids/listview.md#items) collection from the [SelectedItems](/api/wisej.web/lists-and-grids/listview.md#selecteditems) collection.

| Parameter | Type                                                                              | Description                                                                                                                                                                                   |
| --------- | --------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **item**  | [ListViewItem](/api/wisej.web/lists-and-grids/listview/wisej.web.listviewitem.md) | The item in the [Items](/api/wisej.web/lists-and-grids/listview.md#items) collection to remove from the [SelectedItems](/api/wisej.web/lists-and-grids/listview.md#selecteditems) collection. |


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