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How to: Delete Selected Rows

aspnet-3751-components-grid-view-examples-how-to-delete-selected-rows.md

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How to: Delete Selected Rows

  • Sep 30, 2021
  • 2 minutes to read

The example illustrates how to delete selected rows of the ASPxGridView bound to an in-memory data source.

See Also:

View Example

csharp
protected void gridView_CustomCallback(object sender, ASPxGridViewCustomCallbackEventArgs e) {
    if(e.Parameters == "Delete") {
        table = GetTable();
        List<Object> selectItems = grid.GetSelectedFieldValues("ID");
        foreach(object selectItemId in selectItems) {
            table.Rows.Remove(table.Rows.Find(selectItemId));
        }
        grid.DataBind();
        grid.Selection.UnselectAll();
    }
}
aspx
<head runat="server">
    <script type="text/javascript">
        function OnClickButtonDel(s, e) {
            grid.PerformCallback('Delete');
        }
    </script>
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    <dx:ASPxGridView ID="grid" KeyFieldName="ID" runat="server" AutoGenerateColumns="False"
        OnCellEditorInitialize="gridView_CellEditorInitialize" OnRowInserting="gridView_RowInserting"
        OnRowUpdating="gridView_RowUpdating" ClientInstanceName="grid" 
        OnCustomCallback="gridView_CustomCallback" 
        ondatabinding="grid_DataBinding" >
        <Columns>
            <dx:GridViewCommandColumn VisibleIndex="0" ShowSelectCheckbox="True" ShowEditButton="True" ShowNewButton="True" ShowUpdateButton="True">
                <FooterTemplate>
                    <dx:ASPxButton ID="buttonDel" AutoPostBack="false" runat="server" Text="Delete">
                        <ClientSideEvents Click="OnClickButtonDel"/>
                    </dx:ASPxButton>
                </FooterTemplate>
            </dx:GridViewCommandColumn>
            <dx:GridViewDataTextColumn FieldName="ID" ReadOnly="True" VisibleIndex="1">
            </dx:GridViewDataTextColumn>
            <dx:GridViewDataTextColumn FieldName="Data" VisibleIndex="2">
            </dx:GridViewDataTextColumn>
        </Columns>
        <Settings ShowFooter="True" />
    </dx:ASPxGridView>
    </div>
    </form>
</body>
aspx
<head runat="server">
    <script type="text/javascript">
        function OnClickButtonDel(s, e) {
            grid.PerformCallback('Delete');
        }
    </script>
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    <dx:ASPxGridView ID="grid" KeyFieldName="ID" runat="server" AutoGenerateColumns="False"
        OnCellEditorInitialize="gridView_CellEditorInitialize" OnRowInserting="gridView_RowInserting"
        OnRowUpdating="gridView_RowUpdating" ClientInstanceName="grid" 
        OnCustomCallback="gridView_CustomCallback" 
        ondatabinding="grid_DataBinding" >
        <Columns>
            <dx:GridViewCommandColumn VisibleIndex="0" ShowSelectCheckbox="True" ShowEditButton="True" ShowNewButton="True" ShowUpdateButton="True">
                <FooterTemplate>
                    <dx:ASPxButton ID="buttonDel" AutoPostBack="false" runat="server" Text="Delete">
                        <ClientSideEvents Click="OnClickButtonDel"/>
                    </dx:ASPxButton>
                </FooterTemplate>
            </dx:GridViewCommandColumn>
            <dx:GridViewDataTextColumn FieldName="ID" ReadOnly="True" VisibleIndex="1">
            </dx:GridViewDataTextColumn>
            <dx:GridViewDataTextColumn FieldName="Data" VisibleIndex="2">
            </dx:GridViewDataTextColumn>
        </Columns>
        <Settings ShowFooter="True" />
    </dx:ASPxGridView>
    </div>
    </form>
</body>
vb
Protected Sub gridView_CustomCallback(ByVal sender As Object, ByVal e As ASPxGridViewCustomCallbackEventArgs)
    If e.Parameters = "Delete" Then
        table = DirectCast(Session("table"), DataTable)
        Dim selectItems As List(Of Object) = grid.GetSelectedFieldValues("ID")
        For Each selectItemId As Object In selectItems
            table.Rows.Remove(table.Rows.Find(selectItemId))
        Next selectItemId
        grid.DataBind()
        grid.Selection.UnselectAll()
    End If
End Sub