CardViewColumn.ReadOnly Property

Gets or sets whether end-users are allowed to edit the column’s cell values.

Assembly: DevExpress.Web.v18.2.dll

Declaration

C#
VB.NET

[DefaultValue(false)]
public virtual bool ReadOnly { get; set; }

<DefaultValue(False)>
Public Overridable Property ReadOnly As Boolean

Property Value

Type	Default	Description
Boolean	false	true if end-users are not allowed to modify the column’s cell values; otherwise, false.

Remarks

If the ReadOnly property is set to true, the column’s cell values cannot be changed by end-users.

Example

This example illustrates how to handle the ASPxCardView.AfterPerformCallback event to perform simple actions depending on the callback type.

Note

A complete sample project is available at https://github.com/DevExpress-Examples/aspxcardview-how-to-handle-the-aspxcardviewafterperformcallback-event-t281534

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

<%@ Register Assembly="DevExpress.Web.v15.1, Version=15.1.5.0, Culture=neutral, PublicKeyToken=b88d1754d700e49a" Namespace="DevExpress.Web" TagPrefix="dx" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    <dx:ASPxCardView ID="ASPxCardView1" runat="server" ClientInstanceName="cardview" DataSourceID="AccessDataSource1" OnAfterPerformCallback="ASPxCardView1_AfterPerformCallback" KeyFieldName="CustomerID" AutoGenerateColumns="False">
        <Columns>
            <dx:CardViewTextColumn FieldName="CompanyName" VisibleIndex="1">
            </dx:CardViewTextColumn>
            <dx:CardViewTextColumn FieldName="ContactName" VisibleIndex="2">
            </dx:CardViewTextColumn>
            <dx:CardViewTextColumn FieldName="City" VisibleIndex="5">
            </dx:CardViewTextColumn>
            <dx:CardViewTextColumn FieldName="Region" VisibleIndex="6">
            </dx:CardViewTextColumn>
            <dx:CardViewTextColumn FieldName="Country" VisibleIndex="8">
            </dx:CardViewTextColumn>
        </Columns>
        <CardLayoutProperties>
            <Items>
                <dx:CardViewCommandLayoutItem HorizontalAlign="Right" ShowSelectCheckbox="True" ShowEditButton="True">
                </dx:CardViewCommandLayoutItem>
                <dx:CardViewColumnLayoutItem ColumnName="Company Name">
                </dx:CardViewColumnLayoutItem>
                <dx:CardViewColumnLayoutItem ColumnName="Contact Name">
                </dx:CardViewColumnLayoutItem>
                <dx:CardViewColumnLayoutItem ColumnName="City">
                </dx:CardViewColumnLayoutItem>
                <dx:CardViewColumnLayoutItem ColumnName="Region">
                </dx:CardViewColumnLayoutItem>
                <dx:CardViewColumnLayoutItem ColumnName="Country">
                </dx:CardViewColumnLayoutItem>
                <dx:EditModeCommandLayoutItem HorizontalAlign="Right">
                </dx:EditModeCommandLayoutItem>
            </Items>
        </CardLayoutProperties>
        </dx:ASPxCardView>       
        <br />
        <dx:ASPxButton ID="ASPxButton1" AutoPostBack="False" runat="server" Text="Custom Callback">
            <ClientSideEvents Click="function(s, e) {
               cardview.PerformCallback(); 
            }" />
        </dx:ASPxButton>
    <asp:AccessDataSource ID="AccessDataSource1" runat="server" DataFile="~/App_Data/nwind.mdb"
        SelectCommand="SELECT * FROM [Customers]" />
    </div>
    </form>
</body>
</html>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using DevExpress.Web;


public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void ASPxCardView1_AfterPerformCallback(object sender, ASPxCardViewAfterPerformCallbackEventArgs e)
    {
        if (e.CallbackName == "STARTEDIT")
        {
            ASPxCardView1.Columns[0].ReadOnly = true;            
        }

        if (e.CallbackName == "CUSTOMCALLBACK")
        {
            ASPxCardView1.Selection.UnselectAll();
        }
    }
}

Imports System
Imports System.Collections.Generic
Imports System.Linq
Imports System.Web
Imports System.Web.UI
Imports System.Web.UI.WebControls
Imports DevExpress.Web


Partial Public Class _Default
    Inherits System.Web.UI.Page

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)

    End Sub
    Protected Sub ASPxCardView1_AfterPerformCallback(ByVal sender As Object, ByVal e As ASPxCardViewAfterPerformCallbackEventArgs)
        If e.CallbackName = "STARTEDIT" Then
            ASPxCardView1.Columns(0).ReadOnly = True
        End If

        If e.CallbackName = "CUSTOMCALLBACK" Then
            ASPxCardView1.Selection.UnselectAll()
        End If
    End Sub
End Class

<%@ Page Language="vb" AutoEventWireup="true" CodeFile="Default.aspx.vb" Inherits="_Default" %>

<%@ Register Assembly="DevExpress.Web.v15.1, Version=15.1.5.0, Culture=neutral, PublicKeyToken=b88d1754d700e49a" Namespace="DevExpress.Web" TagPrefix="dx" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    <dx:ASPxCardView ID="ASPxCardView1" runat="server" ClientInstanceName="cardview" DataSourceID="AccessDataSource1" OnAfterPerformCallback="ASPxCardView1_AfterPerformCallback" KeyFieldName="CustomerID" AutoGenerateColumns="False">
        <Columns>
            <dx:CardViewTextColumn FieldName="CompanyName" VisibleIndex="1">
            </dx:CardViewTextColumn>
            <dx:CardViewTextColumn FieldName="ContactName" VisibleIndex="2">
            </dx:CardViewTextColumn>
            <dx:CardViewTextColumn FieldName="City" VisibleIndex="5">
            </dx:CardViewTextColumn>
            <dx:CardViewTextColumn FieldName="Region" VisibleIndex="6">
            </dx:CardViewTextColumn>
            <dx:CardViewTextColumn FieldName="Country" VisibleIndex="8">
            </dx:CardViewTextColumn>
        </Columns>
        <CardLayoutProperties>
            <Items>
                <dx:CardViewCommandLayoutItem HorizontalAlign="Right" ShowSelectCheckbox="True" ShowEditButton="True">
                </dx:CardViewCommandLayoutItem>
                <dx:CardViewColumnLayoutItem ColumnName="Company Name">
                </dx:CardViewColumnLayoutItem>
                <dx:CardViewColumnLayoutItem ColumnName="Contact Name">
                </dx:CardViewColumnLayoutItem>
                <dx:CardViewColumnLayoutItem ColumnName="City">
                </dx:CardViewColumnLayoutItem>
                <dx:CardViewColumnLayoutItem ColumnName="Region">
                </dx:CardViewColumnLayoutItem>
                <dx:CardViewColumnLayoutItem ColumnName="Country">
                </dx:CardViewColumnLayoutItem>
                <dx:EditModeCommandLayoutItem HorizontalAlign="Right">
                </dx:EditModeCommandLayoutItem>
            </Items>
        </CardLayoutProperties>
        </dx:ASPxCardView>       
        <br />
        <dx:ASPxButton ID="ASPxButton1" AutoPostBack="False" runat="server" Text="Custom Callback">
            <ClientSideEvents Click="function(s, e) {
               cardview.PerformCallback(); 
            }" />
        </dx:ASPxButton>
    <asp:AccessDataSource ID="AccessDataSource1" runat="server" DataFile="~/App_Data/nwind.mdb"
        SelectCommand="SELECT * FROM [Customers]" />
    </div>
    </form>
</body>
</html>

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CardViewColumn.ReadOnly Property

Declaration

Property Value

Remarks

Example