WebDataSelection Class

Represents selection within the ASPxGridView.

Namespace: DevExpress.Web.Data

Assembly: DevExpress.Web.v24.2.dll

Declaration

C#

public class WebDataSelection :
    WebDataSelectionBase,
    IWebDataSelectAllOwner

VB.NET

Public Class WebDataSelection
    Inherits WebDataSelectionBase
    Implements IWebDataSelectAllOwner

Remarks

The WebDataSelection object is returned by the ASPxGridView.Selection property. It provides multiple methods that enable you to select or deselect individual data rows displayed within the ASPxGridView. To select all rows, use the WebDataSelection.SelectAll method. To clear a selection, use the WebDataSelection.UnselectAll method. To identify whether the specified row is selected, use the GridViewSelection.IsRowSelected method.

For more information, see Selection.

Example

This example illustrates how to dynamically display a focused employee’s photo and details outside the grid.

Follow the steps below:

1. Declare the OnGridFocusedRowChanged() function that queries the server to return the employee ID and Notes. This function handles the ASPxClientGridView.FocusedRowChanged event.

2. Pass the returned array to the OnGetRowValues(values) function that defines values for the corresponding HTML elements.

The image below shows the result:

ASPX

<dx:ASPxGridView ID="ASPxGridView1" ClientInstanceName="grid">
    <ClientSideEvents FocusedRowChanged="OnGridFocusedRowChanged" />
</dx:ASPxGridView>

JS

// The function is called when the focused row is changed.
function OnGridFocusedRowChanged() {
    // Query the server for the "EmployeeID" and "Notes" fields of the focused row. 
    // The values are returned to the OnGetRowValues() function.
    grid.GetRowValues(grid.GetFocusedRowIndex(), 'EmployeeID;Notes', OnGetRowValues);
}
//Value array contains "EmployeeID" and "Notes" field values returned from the server.
function OnGetRowValues(values) {
    var notes = document.getElementById("detailnotes");
    notes.value = values[1];
    var image = document.getElementById("detailimage");
    image.src = "FocusedRow.aspx?Photo=" + values[0];
}

Inheritance

Object

WebDataSelectionBase

WebDataSelection

CardViewSelection

GridViewSelection

VerticalGridSelection