"Steve Harclerode" wrote:

> On my first attempt at this newsgroup post, I cut & pasted some code in the
> wrong order. The corrected code is below.
> ----------------------
>
> This is a standard .Net question, although my starting point is a Commerce
> Server 2007 application that I need to modify.
>
> I have a page that includes 2 user controls: a LoginView and a custom
> control that is generated dynamically which shows the line items in a
> shopping cart. The client does not need to be logged in to see the shopping
> cart.
>
> My client has asked me to put a trash can button next to each line item that
> can be used to delete that line item. I have everything hooked up and
> working, *except* that the postback from the trash button causes validation
> for the login form. This means that the validation controls
> (RequiredFieldValidator controls) display their error messages after I click
> the trash button.
>
> Is there some way to "abort" processing of the validation? It looks as
> though the validation is happening on the server side, since I am able to
> use the debugger to step into my handler function after hitting the trash
> button.
>
> Here's the code for a text field plus the associate validator:
>                 <asp:TextBox ID="UserName"  Width="155" runat="server"
> CssClass="estoretextbox" ValidationGroup="Login" />
>                 <asp:RequiredFieldValidator ID="reqPassword"
> ControlToValidate="Password" ErrorMessage="Please enter Password"
>                     runat="server" Display="Dynamic"
> ValidationGroup="Login"></asp:RequiredFieldValidator>
>
> And here's C# code that I use to create the trash button:
>
>     ImageButton btnTrash = new ImageButton();
>     btnTrash.ID =
> this.GetUniqueImageControlName(lineItem.LineItemId.ToString());
>     btnTrash.ImageUrl = "images/trashcan.jpg";
>     btnTrash.Height = new Unit(15);
>     btnTrash.Width = new Unit(10);
>     // Some things I have tried:
>     //btnTrash.ValidationGroup = "dummy";
>     //btnTrash.Attributes.Add("onclick", "Page_ValidationActive=false");
>     //btnTrash.CausesValidation = false;
>     btnTrash.Attributes.Add("OnServerClick", "TrashButton_Click");
>
>     btnTrash.RenderControl(writer);
>
>
> --
> Steve
>
>
>
>

"Joy" wrote:

> Hi Steve,
>
> Looking at your code it seems that you did try setting "CausesValidation"
> Property (of trash button) to false (though i must say it is not a good idea
> if the button in question is not a "Reset" or "Clear" button), so was curious
> to know did it not work for you?
>
> Can you also paste the code that is executed when a PostBack is triggered?
>
> regards,
> Joy
>
>
> "Steve Harclerode" wrote:
>
> > On my first attempt at this newsgroup post, I cut & pasted some code in the
> > wrong order. The corrected code is below.
> > ----------------------
> >
> > This is a standard .Net question, although my starting point is a Commerce
> > Server 2007 application that I need to modify.
> >
> > I have a page that includes 2 user controls: a LoginView and a custom
> > control that is generated dynamically which shows the line items in a
> > shopping cart. The client does not need to be logged in to see the shopping
> > cart.
> >
> > My client has asked me to put a trash can button next to each line item that
> > can be used to delete that line item. I have everything hooked up and
> > working, *except* that the postback from the trash button causes validation
> > for the login form. This means that the validation controls
> > (RequiredFieldValidator controls) display their error messages after I click
> > the trash button.
> >
> > Is there some way to "abort" processing of the validation? It looks as
> > though the validation is happening on the server side, since I am able to
> > use the debugger to step into my handler function after hitting the trash
> > button.
> >
> > Here's the code for a text field plus the associate validator:
> >                 <asp:TextBox ID="UserName"  Width="155" runat="server"
> > CssClass="estoretextbox" ValidationGroup="Login" />
> >                 <asp:RequiredFieldValidator ID="reqPassword"
> > ControlToValidate="Password" ErrorMessage="Please enter Password"
> >                     runat="server" Display="Dynamic"
> > ValidationGroup="Login"></asp:RequiredFieldValidator>
> >
> > And here's C# code that I use to create the trash button:
> >
> >     ImageButton btnTrash = new ImageButton();
> >     btnTrash.ID =
> > this.GetUniqueImageControlName(lineItem.LineItemId.ToString());
> >     btnTrash.ImageUrl = "images/trashcan.jpg";
> >     btnTrash.Height = new Unit(15);
> >     btnTrash.Width = new Unit(10);
> >     // Some things I have tried:
> >     //btnTrash.ValidationGroup = "dummy";
> >     //btnTrash.Attributes.Add("onclick", "Page_ValidationActive=false");
> >     //btnTrash.CausesValidation = false;
> >     btnTrash.Attributes.Add("OnServerClick", "TrashButton_Click");
> >
> >     btnTrash.RenderControl(writer);
> >
> >
> > --
> > Steve
> >
> >
> >
> >

"Joy" <J**@discussions.microsoft.com> wrote in message
news:7BC2CCD3-FE26-4E29-890C-AA105778865A@microsoft.com...
> Hi Steve,
>
> Looking at your code it seems that you did try setting "CausesValidation"
> Property (of trash button) to false (though i must say it is not a good
> idea
> if the button in question is not a "Reset" or "Clear" button), so was
> curious
> to know did it not work for you?
>
> Can you also paste the code that is executed when a PostBack is triggered?
>
> regards,
> Joy
>
>
> "Steve Harclerode" wrote:
>

"Steve Harclerode" wrote:

> Hi Joy,
>
> Thanks. Here's the method signature of the callback function (plus a few
> lines of code). I'm not 100% sure how LoadPostData gets wired up, but
> setting breakpoints here in the debugger makes it clear that it is in fact
> being called:
>         public bool LoadPostData(string postDataKey, NameValueCollection
> postCollection)
>         {
>             if (postCollection == null)
>             {
>                 throw new ArgumentNullException("postCollection");
>             }
>
>             IEnumerable<LineItem> lineItems = this.Helper.GetAllLineItems();
>             // first check to see if trash icon was clicked, and if so set
> the quantity to 0 for the item
>             foreach (LineItem lineItem in lineItems)
>             {
>                 string value =
> postCollection[this.GetUniqueImageControlName(lineItem.LineItemId.ToString())
> + ".x"];
>                 if (!String.IsNullOrEmpty(value))
>                 {
>                             lineItem.Quantity = 0;
>                 }
>             }
> ....
>
> Here's the method that I'm overriding in order to create the WebControl
> contents. It occurs to me the rendering might be happening after the
> validation is done for the control that contains the LoginView. Not sure
> what I can do about that, without re-writing the entire WebControl to be a
> bit less dynamic:
> protected override void RenderContents(HtmlTextWriter writer)
> {
>             // rendering stuff here
> }
>
> Here's the class signature for the WebControl:
>     public class BasketDetail : WebControl, IPostBackDataHandler,
> IPostBackEventHandler
>
> "Joy" <J**@discussions.microsoft.com> wrote in message
> news:7BC2CCD3-FE26-4E29-890C-AA105778865A@microsoft.com...
> > Hi Steve,
> >
> > Looking at your code it seems that you did try setting "CausesValidation"
> > Property (of trash button) to false (though i must say it is not a good
> > idea
> > if the button in question is not a "Reset" or "Clear" button), so was
> > curious
> > to know did it not work for you?
> >
> > Can you also paste the code that is executed when a PostBack is triggered?
> >
> > regards,
> > Joy
> >
> >
> > "Steve Harclerode" wrote:
> >
>
>