radinputmanager, webservice and textchanged

[Chris]

I have what on the surface looks like a fairly simple scenario. I have a textbox validated by a radinputmanager via a webservice. This allows the user to enter a produce code. If the code is valid then I want to populate some values with the textboxes textchanged event.

Heres what I have:

<asp:TextBox ID="ProductReferenceTextBox" runat="server" Text='<%#Bind("ProductReference") %>' MaxLength="8"
                            AutoPostBack="true" OnTextChanged="ProductReferenceTextBox_TextChanged" />

<t:RadInputManager ID="MainInputManager" runat="server">
        <t:TextBoxSetting BehaviorID="ProductReferenceBehavior" Validation-Method="ValidateProductCode"
            Validation-Location="ValidationServices/ProductService.asmx" Validation-ValidateOnEvent="All" Validation-IsRequired="true" />

protected void ProductReferenceTextBox_TextChanged(object Sender, EventArgs E)
{
TextBox oSender = (TextBox)Sender;

if (IocContainer.ProductDao.Exists(oSender.Text))
{
  Product eProduct = IocContainer.ProductDao.GetProduct(oSender.Text);

    GridDataInsertItem oContainer = (GridDataInsertItem)oSender.NamingContainer;

  Label oLabel = (Label)oContainer.Controls[5].Controls[0];

  oLabel.Text = eProduct.StockUnit;
  }
  }

This is fine if the code entered is valid, but if the code is invalid (i.e. the webservice validation fails) I don't want to postback to the textchanged event.

Is there any way to do this?

Thanks

[Martin]

Hello Chris,

I am afraid that when the text box AutoPostBack property is set to true, it is impossible to prevent the post back even when validation fails. Instead you should use a separate control which would submit the form. This is the exact approach used in this online example (form is submitted when update button is clicked).

I hope this helps.

All the best,
Martin
the Telerik team