GridViewSelection.UnselectRowByKey(Object) Method

Deselects the row specified by the key value.

Namespace: DevExpress.Web.Data

Assembly: DevExpress.Web.v24.2.dll

Declaration

C#

public void UnselectRowByKey(
    object keyValue
)

VB.NET

Public Sub UnselectRowByKey(
    keyValue As Object
)

Parameters

Name	Type	Description
keyValue	Object	The row’s key value.

Remarks

Use the SelectRowByKey(Object) and UnselectRowByKey methods to select and deselect the row specified by the key value.

When the row selection changes, the control raises the client-side ASPxClientGridView.SelectionChanged or the server-side ASPxGridBase.SelectionChanged event (based on the ProcessSelectionChangedOnServer property value).

For more information on row selection in the grid, refer to the following topic: Selection.

The code sample below gets the current selection state of the row with the specified key value and changes it.

ASPX

<dx:ASPxGridView ID="gridview" ClientInstanceName="grid" runat="server" AutoGenerateColumns="False"
    KeyFieldName="ProductID" OnCustomCallback="gridview_CustomCallback">
    <Columns>
        <dx:GridViewCommandColumn ShowSelectCheckbox="true" VisibleIndex="0" />
        <%--...--%>
    </Columns>
</dx:ASPxGridView>
<br />
<dx:ASPxButton ID="ASPxButton1" runat="server" Text="Change selection state" AutoPostBack="false">
    <ClientSideEvents Click="onButtonClick" />
</dx:ASPxButton>

JS

function onButtonClick(s, e) {
    grid.PerformCallback();
}

C#

protected void gridview_CustomCallback(object sender, ASPxGridViewCustomCallbackEventArgs e) {
    var grid = sender as ASPxGridView;
    var rowKey = 6;
    if(grid.Selection.IsRowSelectedByKey(rowKey)) {
        grid.Selection.UnselectRowByKey(rowKey);
    } else {
        grid.Selection.SelectRowByKey(rowKey);
    }
}

VB.NET

Protected Sub gridview_CustomCallback(ByVal sender As Object, ByVal e As ASPxGridViewCustomCallbackEventArgs)
    Dim grid = TryCast(sender, ASPxGridView)
    Dim rowKey = 6

    If grid.Selection.IsRowSelectedByKey(rowKey) Then
        grid.Selection.UnselectRowByKey(rowKey)
    Else
        grid.Selection.SelectRowByKey(rowKey)
    End If
End Sub

Deselect the Row Specified by the Composite Key Value

ASPX

<dx:ASPxGridView ID="grid" ClientInstanceName="grid" runat="server" KeyFieldName="ProductID;ProductName">
</dxASPxGridView>

C#

grid.Selection.UnselectRowByKey("2|Chang");

VB.NET

grid.Selection.UnselectRowByKey("2|Chang")