# BindingContext

Namespace: **Wisej.Web**

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

Manages the collection of [BindingManagerBase](/api/wisej.web/data-binding/wisej.web.bindingmanagerbase.md) objects for any object that inherits from the [Control](/api/wisej.web/general/control.md) class.

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

```csharp
public class BindingContext : BindingContext
```

{% endtab %}

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

```visual-basic
Public Class BindingContext
    Inherits BindingContext
```

{% endtab %}
{% endtabs %}

## Constructors

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

Creates a new instance of [BindingContext](/api/wisej.web/data-binding/wisej.web.bindingcontext.md).

## Properties

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

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

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

[BindingManagerBase](/api/wisej.web/data-binding/wisej.web.bindingmanagerbase.md): Returns the [BindingManagerBase](/api/wisej.web/data-binding/wisej.web.bindingmanagerbase.md) that is associated with the data source.

### ![](/files/hsR4ok3152WyAf8J2C1u) Item(dataSource, dataMember)

[BindingManagerBase](/api/wisej.web/data-binding/wisej.web.bindingmanagerbase.md): Returns a [BindingManagerBase](/api/wisej.web/data-binding/wisej.web.bindingmanagerbase.md) that is associated with the data source and data member.

**Throws:**

* [Exception](https://docs.microsoft.com/dotnet/api/system.exception) The specified *dataMember* does not exist in the specified data source.

## Methods

### ![](/files/hsR4ok3152WyAf8J2C1u) Add(dataSource, listManager)

Adds the [BindingManagerBase](/api/wisej.web/data-binding/wisej.web.bindingmanagerbase.md) associated with a specific data source to the collection.

| Parameter       | Type                                                                              | Description                                                                                                       |
| --------------- | --------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------- |
| **dataSource**  | [Object](https://docs.microsoft.com/dotnet/api/system.object)                     | The object associated with the [BindingManagerBase](/api/wisej.web/data-binding/wisej.web.bindingmanagerbase.md). |
| **listManager** | [BindingManagerBase](/api/wisej.web/data-binding/wisej.web.bindingmanagerbase.md) | The [BindingManagerBase](/api/wisej.web/data-binding/wisej.web.bindingmanagerbase.md) to add.                     |

**Throws:**

* [ArgumentNullException](https://docs.microsoft.com/dotnet/api/system.argumentnullexception) *dataSource* is null, or *listManager* is null.

### ![](/files/lzopMboA31bVq8UIcbT3) AddCore(dataSource, listManager)

Adds the [BindingManagerBase](/api/wisej.web/data-binding/wisej.web.bindingmanagerbase.md) associated with a specific data source to the collection.

| Parameter       | Type                                                                              | Description                                                                                                       |
| --------------- | --------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------- |
| **dataSource**  | [Object](https://docs.microsoft.com/dotnet/api/system.object)                     | The object associated with the [BindingManagerBase](/api/wisej.web/data-binding/wisej.web.bindingmanagerbase.md). |
| **listManager** | [BindingManagerBase](/api/wisej.web/data-binding/wisej.web.bindingmanagerbase.md) | The [BindingManagerBase](/api/wisej.web/data-binding/wisej.web.bindingmanagerbase.md) to add.                     |

**Throws:**

* [ArgumentNullException](https://docs.microsoft.com/dotnet/api/system.argumentnullexception) *dataSource* is null, or *listManager* is null.

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

Clears the collection of any [BindingManagerBase](/api/wisej.web/data-binding/wisej.web.bindingmanagerbase.md) objects.

### ![](/files/lzopMboA31bVq8UIcbT3) ClearCore()

Clears the collection of any [BindingManagerBase](/api/wisej.web/data-binding/wisej.web.bindingmanagerbase.md) objects.

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

Returns whether the [BindingContext](/api/wisej.web/data-binding/wisej.web.bindingcontext.md) contains the [BindingManagerBase](/api/wisej.web/data-binding/wisej.web.bindingmanagerbase.md) associated with the data source.

| Parameter      | Type                                                          | Description                                                                                       |
| -------------- | ------------------------------------------------------------- | ------------------------------------------------------------------------------------------------- |
| **dataSource** | [Object](https://docs.microsoft.com/dotnet/api/system.object) | An [Object](https://docs.microsoft.com/dotnet/api/system.object) that represents the data source. |

**Returns:** [Boolean](https://docs.microsoft.com/dotnet/api/system.boolean). true if the [BindingContext](/api/wisej.web/data-binding/wisej.web.bindingcontext.md) contains the [BindingManagerBase](/api/wisej.web/data-binding/wisej.web.bindingmanagerbase.md); otherwise, false.

### ![](/files/hsR4ok3152WyAf8J2C1u) Contains(dataSource, dataMember)

Returns whether the [BindingContext](/api/wisej.web/data-binding/wisej.web.bindingcontext.md) contains the [BindingManagerBase](/api/wisej.web/data-binding/wisej.web.bindingmanagerbase.md) associated with the data source and data member.

| Parameter      | Type                                                          | Description                                                                                                                        |
| -------------- | ------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------- |
| **dataSource** | [Object](https://docs.microsoft.com/dotnet/api/system.object) | An [Object](https://docs.microsoft.com/dotnet/api/system.object) that represents the data source.                                  |
| **dataMember** | [String](https://docs.microsoft.com/dotnet/api/system.string) | The information needed to resolve to a specific [BindingManagerBase](/api/wisej.web/data-binding/wisej.web.bindingmanagerbase.md). |

**Returns:** [Boolean](https://docs.microsoft.com/dotnet/api/system.boolean). true if the [BindingContext](/api/wisej.web/data-binding/wisej.web.bindingcontext.md) contains the [BindingManagerBase](/api/wisej.web/data-binding/wisej.web.bindingmanagerbase.md); otherwise, false.

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

Removes the [BindingManagerBase](/api/wisej.web/data-binding/wisej.web.bindingmanagerbase.md) associated with the specified *dataSource* .

| Parameter      | Type                                                          | Description                                |
| -------------- | ------------------------------------------------------------- | ------------------------------------------ |
| **dataSource** | [Object](https://docs.microsoft.com/dotnet/api/system.object) | An object that represents the data source. |

### ![](/files/lzopMboA31bVq8UIcbT3) RemoveCore(dataSource)

Removes the [BindingManagerBase](/api/wisej.web/data-binding/wisej.web.bindingmanagerbase.md) associated with the specified *dataSource* .

| Parameter      | Type                                                          | Description                                |
| -------------- | ------------------------------------------------------------- | ------------------------------------------ |
| **dataSource** | [Object](https://docs.microsoft.com/dotnet/api/system.object) | An object that represents the data source. |

### ![](/files/lIX317sDtMTZJBi9oSIx) UpdateBinding(newBindingContext, binding)

Associates a [Binding](/api/wisej.web/data-binding/wisej.web.binding.md) with a new [BindingContext](/api/wisej.web/data-binding/wisej.web.bindingcontext.md).

| Parameter             | Type                                                                      | Description                                                                                                                                                          |
| --------------------- | ------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **newBindingContext** | [BindingContext](/api/wisej.web/data-binding/wisej.web.bindingcontext.md) | The new [BindingContext](/api/wisej.web/data-binding/wisej.web.bindingcontext.md) to associate with the [Binding](/api/wisej.web/data-binding/wisej.web.binding.md). |
| **binding**           | [Binding](/api/wisej.web/data-binding/wisej.web.binding.md)               | The [Binding](/api/wisej.web/data-binding/wisej.web.binding.md) to associate with the new [BindingContext](/api/wisej.web/data-binding/wisej.web.bindingcontext.md). |

## Events

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

[CollectionChangeEventHandler](https://docs.microsoft.com/dotnet/api/system.componentmodel.collectionchangeeventhandler) Fired when the collection of data sources changes.


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