LinqDataSource.Update Method (IDictionary, IDictionary, IDictionary)

.NET Framework (current version)

Performs an update operation.

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

Syntax

member Update : 
        keys:IDictionary *
        values:IDictionary *
        oldValues:IDictionary -> int

Parameters

keys: Type: System.Collections.IDictionary
The row key values for the records to be updated.

values: Type: System.Collections.IDictionary
The row values to be updated in the data source.

oldValues: Type: System.Collections.IDictionary
The row values that are evaluated to detect data conflicts.

Return Value

Type: System.Int32

The number of records affected by the update operation.

Typically, you do not have to call the Update method from your code. The data-bound control will automatically call the Update method when the user takes action to update a record. You explicitly call the Update method when you want to create your own process for updating data.

Examples

The following example shows how to programmatically update a record in the data source after the user clicks a button. The code passes a ListDictionary object that contains the key value, a ListDictionary object that contains the original values, and a ListDictionary object that contains the new values to the Update method.

No code example is currently available or this language may not be supported.

The following example shows the markup for the previous example.

No code example is currently available or this language may not be supported.

Version Information

.NET Framework
Available since 3.5