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How to fire server event when clicking checkbox

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Al
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Al asked on 01 Aug 2015, 09:21 AM

Hi,

I have listview that works well with the definition below:

<telerik:RadListView ID="lvwUserGroups" runat="server" ItemPlaceholderID="groupsPlaceholder" OnNeedDataSource="lvwUserGroups_NeedDataSource"
    DataKeyNames="GroupID" >
    <LayoutTemplate>
        <div class="RadListView RadListView_<%# Master.SkinManager.Skin %>" >
            <table class="mainTable">
                <thead>
                    <tr class="rlvHeader">
                        <th class="thcenter">Enabled</th>
                        <th>Group</th>
                    </tr>
                </thead>
                <tbody>
                    <asp:PlaceHolder id="groupsPlaceholder" runat="server">
                    </asp:PlaceHolder>
                </tbody>
            </table>
        </div>
    </LayoutTemplate>
</telerik:RadListView>

 

protected class userGRPTemplate : ITemplate
{
    private ADScrubWeb.HTMLHelper helper = new ADScrubWeb.HTMLHelper();
 
    public userGRPTemplate()
    {
    }
 
    public void InstantiateIn(Control container)
    {
        TableRow tr = new TableRow();
        container.Controls.Add(tr);
 
        helper.AddControlToParent(container, helper.AddBoundHiddenField("GroupID"));
 
        helper.AddControlToParent(tr, helper.AddBoundCheckBox("Enabled"), true, HorizontalAlign.Center);
        helper.AddControlToParent(tr, helper.AddBoundTextBox("GroupName", BorderStyle.None, true), true, HorizontalAlign.Left);               
    }
}

 

public CheckBox AddBoundCheckBox(string controlID)
{
    CheckBox tmp = new CheckBox();
    tmp.ID = controlID;
    tmp.DataBinding += delegate(object sender, EventArgs args)
    {
        CheckBox control = ((CheckBox)sender);
        RadListViewDataItem listViewDataItem = ((RadListViewDataItem)control.NamingContainer);
        control.Checked = lsuGeneral.IsTrue(DataBinder.Eval(listViewDataItem.DataItem, controlID).ToString());
    };
    return tmp;
}

 

I would like to react to the user clicking the bound checkbox so I can do auto-updates without the user clicking an update button. I tried wiring up the checkbox CheckedChange event in the ITemplate but that didn't fire, anyway I would still need to know which row's checkbox was clicked.

Any ideas?

 

 

 

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Maria Ilieva
Telerik team
answered on 04 Aug 2015, 02:47 PM
Hello,

Please try setting the AutoPostback property of the CheckBox control to "true" and see how it goes.


Regards,
Maria Ilieva
Telerik
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Al
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answered on 08 Aug 2015, 08:35 AM

Thanks Maria, I missed that. For anyone else interested, I used something like this in my listview template:

 

    public void InstantiateIn(Control container)
    {
        CheckBox chkIsKey = helper.AddBoundCheckBox("IsKey");
        chkIsKey.AutoPostBack = true;
        chkIsKey.CheckedChanged += chkIsKey_CheckedChanged;
 
        helper.AddControlToParent(chkIsKey);
 
    }
 
    void chkIsKey_CheckedChanged(object sender, EventArgs e)
    {               
        CheckBox chk = ((CheckBox)sender);
        if (chk.Checked)
        {
            RadListViewDataItem listViewDataItem = ((RadListViewDataItem)chk.NamingContainer);
             
            //Do something with other controls on this row
            CheckBox someOtherCheckbox = ((CheckBox)listViewDataItem.FindControl("someOtherCheckbox"));
            someOtherCheckbox.Checked = true;
 
 
            //Do something with other controls in this list
            RadListView listView = listViewDataItem.OwnerListView;
            foreach (RadListViewDataItem dataItem in listView.Items)
            {
                CheckBox xx = ((CheckBox)dataItem.FindControl("xx"));
                xx.Checked = false;
            }
        }
    }
}

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Maria Ilieva
Telerik team
answered on 12 Aug 2015, 10:35 AM
Hi Al,

Thank you for sharing your solution. I'm sure it will help other users to implement such functionality.

Regards,
Maria Ilieva
Telerik
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Maria Ilieva
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