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Example E4283
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Grid View for ASP.NET Web Forms - How to specify a custom button action for particular grid rows

This example demonstrates how to create a custom Edit button and specify its action based on the row's visible index.

customEditButton

Overview

Follow the steps below:

  1. Create the Grid View control and bind it to a data source. Add a GridViewCommandColumn and use the CustomButtons property to create a custom Edit button.
    ASPx
    <asp:AccessDataSource ID="ads" runat="server" DataFile="~/App_Data/NorthWind.mdb"  
    SelectCommand="SELECT [CategoryID], [CategoryName], [Description] FROM [Categories]">  
</asp:AccessDataSource>  
<dx:ASPxGridView ID="gv" ClientInstanceName="gv" runat="server" AutoGenerateColumns="False"  
    KeyFieldName="CategoryID" DataSourceID="ads" ...>  
    <ClientSideEvents CustomButtonClick="gv_OnCustomButtonClick" />  
    <Columns>  
        <dx:GridViewCommandColumn VisibleIndex="0">  
            <CustomButtons>  
                <dx:GridViewCommandColumnCustomButton ID="EditBnt" Text="Edit" />  
            </CustomButtons>  
        </dx:GridViewCommandColumn>  
        <!-- ... -->  
    </Columns>  
    <!-- ... -->  
</dx:ASPxGridView>
  2. Handle the grid's client-side CustomButtonClick event. Use the row's visible index to indicate whether the row is odd or even. Call the grid's StartEditRow method to start editing even rows. For odd rows, specify an alert message.
    JavaScript
    function gv_OnCustomButtonClick(s, e) {  
    if (e.visibleIndex % 2 === 0)  
        alert("You cannot edit this row!");  
    else  
        s.StartEditRow(e.visibleIndex);  
}

Files to Review

Documentation

Example Code

WebSite/Default.aspx 
ASPx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<%@ Register Assembly="DevExpress.Web.v13.1, Version=13.1.14.0, Culture=neutral, PublicKeyToken=b88d1754d700e49a"
    Namespace="DevExpress.Web" TagPrefix="dx" %>









<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>How to disable the "Edit" button action in some rows of ASPxGridView</title>
    <script type="text/javascript">
        function gv_OnCustomButtonClick(s, e) {
            if (e.visibleIndex % 2 === 0)
                alert("You cannot edit this row!");
            else
                s.StartEditRow(e.visibleIndex);
        }
    </script>
</head>
<body>
    <form id="form1" runat="server">
        <asp:AccessDataSource ID="ads" runat="server" DataFile="~/App_Data/NorthWind.mdb"
            SelectCommand="SELECT [CategoryID], [CategoryName], [Description] FROM [Categories]">
        </asp:AccessDataSource>
        <dx:ASPxGridView ID="gv" ClientInstanceName="gv" runat="server" AutoGenerateColumns="False"
            KeyFieldName="CategoryID" DataSourceID="ads" OnRowUpdating="gv_RowUpdating">
            <ClientSideEvents CustomButtonClick="gv_OnCustomButtonClick" />
            <Columns>
                <dx:GridViewCommandColumn VisibleIndex="0">
                    <CustomButtons>
                        <dx:GridViewCommandColumnCustomButton ID="EditBnt" Text="Edit">
                        </dx:GridViewCommandColumnCustomButton>
                    </CustomButtons>
                </dx:GridViewCommandColumn>
                <dx:GridViewDataTextColumn FieldName="CategoryID" VisibleIndex="1" ReadOnly="True">
                    <EditFormSettings Visible="False" />
                </dx:GridViewDataTextColumn>
                <dx:GridViewDataTextColumn FieldName="CategoryName" VisibleIndex="2">
                </dx:GridViewDataTextColumn>
                <dx:GridViewDataTextColumn FieldName="Description" VisibleIndex="3">
                </dx:GridViewDataTextColumn>
            </Columns>
            <SettingsLoadingPanel Mode="Disabled" />
        </dx:ASPxGridView>
    </form>
</body>
</html>

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