GridCheckBoxColumn validation

[Rizwan Ansari]

Hello Sir,

How can i make validation for GridCheckBoxColumn.
I have a dropdownlist depending upon the value the checkbox is visible/hide.
but i want when checkbox is visible it should validate..if checkbox is disabled then no need for validation..

Please Help.

Thanks

 

[Shinu]

Hello,


I guess you want to hide/show the DropDownList based on checkbox status and from client side.

If so one suggestion is:
In the ItemCreated event, access the CheckBox control and DropDownList control and get the ClientIDs.
Now attach "onclick" event from to checkbox  and pass the client objects of checkbox and DropDownList ClientID.
In the client side event handler, access the DrodDownList from the ClientID passed, and set the property as required.


Hope this suggestion helps.

-Shinu.

[Rizwan Ansari]

Hi Shinu.
Thanks for reply.

i am able to show/hide checkbox according to dropdown value.
suppose i select value and check box is visible then i want validation from client..means checkbox should be checked before insert.
if checkbox is not visible then i dont want validation should be done.

i hope understand.
Thanks

[Princy]

Hello Rizwan,

In order to achieve your requirement, store the GridCheckBoxColumn ID in a HiddenField when it is insert mode. Then in grid 'OnCommand' client event access the CheckBox using the HiddenField value and perform validation. Sample code is given below for your reference.

ASPX:

<asp:HiddenField ID="HiddenField1" runat="server" />

C#:

protected void RadGrid1_ItemCreated(object sender, GridItemEventArgs e)
   {
       if (e.Item is GridEditFormInsertItem && e.Item.OwnerTableView.IsItemInserted)
       {
           GridEditFormInsertItem insertItem = (GridEditFormInsertItem)e.Item;
           CheckBox chkbox = (CheckBox)insertItem["GridCheckBoxColumn"].Controls[0];
           HiddenField1.Value = chkbox.ClientID;
       }
   }

ASPX:

<ClientSettings>
    <ClientEvents OnCommand="OnCommand"></ClientEvents>
</ClientSettings>

Java Script:

function OnCommand(sender, args) {
      args.get_commandName() == "PerformInsert"
       {
           var checkbox = $get(document.getElementById('HiddenField1').value);
           if (checkbox != null) {// checkbox will be null if it is not visible
               if (!checkbox.checked) {
                   alert("checkbox should be checked before insert");
                   args.set_cancel(true);
               }
           }
       }
   }

Thanks,
Princy.

[Rizwan Ansari]

Hi shinu.

Thnaks for reply..but unfortunately when i click add new/edit record..throws an error "object required"..i am showing you the code.please take a look and guide me.i thik error in javascript on line

var

 

checkbox = $get(document.getElementById('HiddenField1').value);

if (e.Item is GridEditFormInsertItem && e.Item.OwnerTableView.IsItemInserted)
{
    GridEditFormInsertItem insertItem = (GridEditFormInsertItem)e.Item;
    CheckBox chkbox1 = (CheckBox)insertItem["approved"].Controls[0];
    HiddenField1.Value = chkbox1.ClientID;
    chkbox1.ID = "CheckValidate";
    RequiredFieldValidator reqValidator2 = new RequiredFieldValidator();
    reqValidator2.ID = "RequiredFieldValidator2";
    reqValidator2.ErrorMessage = "Approved Required";
    reqValidator2.ControlToValidate = "CheckValidate";
    insertItem["approved"].Controls.Add(reqValidator2);
    TextBox txtbx = (TextBox)insertItem["Amount"].Controls[0];
    txtbx.ID = "TextValidate";
    RequiredFieldValidator reqValidator = new RequiredFieldValidator();
    reqValidator.ID = "RequiredFieldValidator1";
    reqValidator.ErrorMessage = "Amount Required";
    reqValidator.ControlToValidate = "TextValidate";
    insertItem["Amount"].Controls.Add(reqValidator);
}

[Princy]

Hello Rizwan,

Check whether you have added a HiddenField with ID 'HiddenField1' in your page. And try the following way to access the CheckBox.
 var checkbox = document.getElementById(document.getElementById('HiddenField1').value);

Then in code behind try the following approach instead of giving an explicit ID to CheckBox.

C#:

if (e.Item is GridEditFormInsertItem && e.Item.OwnerTableView.IsItemInserted)
 {
    GridEditFormInsertItem insertItem = (GridEditFormInsertItem)e.Item;
    CheckBox chkbox1 = (CheckBox)insertItem["approved"].Controls[0];
    HiddenField1.Value = chkbox1.ClientID;
    RequiredFieldValidator reqValidator2 = new RequiredFieldValidator();
    reqValidator2.ID = "RequiredFieldValidator2";
    reqValidator2.ErrorMessage = "Approved Required";
    reqValidator2.ControlToValidate = chkbox.ID;
    . . . . . . .
 }

Thanks,
Princy.