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Member

tspring-allegra - 10/3/2012 5:50:07 AM

Form Controls & Page_Load

Hi,

I'm trying to update some custom bizform code from Kentico4.1 to Kentico6 and have run into a problem I cant seam to fix.

Previously the 4.1 code wrote some data to a bizform textbox control during the Page_Load.

Which was simply:


protected void Page_Load(object sender, EventArgs e)
{
    viewBiz.SiteName = "MySiteName";
    viewBiz.FormName = "MyFormName";
    this.viewBiz.BasicForm.DataRow["FormTextField"] = "My text";
}

But in 6, the function DataRow doesn't exist anymore.

I've tried using:


protected void Page_Load(object sender, EventArgs e)
{
    viewBiz.SiteName = "MySiteName";
    viewBiz.FormName = "MyFormName";
    this.viewBiz.BasicForm.Data["FormTextField"] = "My text";
}

and


protected void Page_Load(object sender, EventArgs e)
{
    viewBiz.SiteName = "MySiteName";
    viewBiz.FormName = "MyFormName";
    EditingFormControl TextField_ID = viewBiz.BasicForm.FieldEditingControls["FormTextField"] as EditingFormControl;
    TextField_ID.Value = "My text";
}

But both produce a "System.NullReferenceException" error. Which I guess is because i'm not referencing the form properly.

How do I correctly access the form fields during Page_Load in Kentico6??

Thanks,
Tim


Kentico Customer Success	kentico_martind2 - 10/4/2012 4:13:26 AM RE:Form Controls & Page_Load Hello Tim, this is caused because several changes were made to the Kentico v6 API. Now you are supposed to use it in the following way: ((CMS.FormControls.EditingFormControl)viewBiz.BasicForm.FieldEditingControls["CustomField"]).Value = "your_text" I hope this will help you. Best regards, Martin Danko

Member

tspring-allegra - 10/4/2012 4:56:07 AM

RE:Form Controls & Page_Load

Hi Martin,

Thanks for the help, but I still get the same error.

Basically I have a custom form webpart that automatically populates form fields with data from an external source. I've tried to write a test webpart with most of the custom code stripped so only the basic function of writing data into a form field remains.

My test code is:
BizformTest.ascx


<%@ Control Language="C#" AutoEventWireup="true" CodeFile="~/CMSWebParts/Custom/BizformTest.ascx.cs" Inherits="CMSWebParts_Custom_BizformTest" %>

<cms:BizForm ID="viewBiz" runat="server" IsLiveSite="true" />

BizformTest.ascx.cs


using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

using CMS.PortalControls;
using CMS.FormEngine;
using CMS.CMSHelper;
using CMS.GlobalHelper;

using CMS.SettingsProvider;
using CMS.DataEngine;
using CMS.EmailEngine;
using CMS.FormControls;

using CMS.PortalEngine;
using CMS.SiteProvider;
using CMS.EventLog;

using System.Data.SqlClient;


public partial class CMSWebParts_Custom_BizformTest: CMSAbstractWebPart
{
    /// <summary>
    /// Content loaded event handler
    /// </summary>
    public override void OnContentLoaded()
    {
        base.OnContentLoaded();
        SetupControl();
    }

    /// <summary>
    /// Reloads data for partial caching
    /// </summary>
    public override void ReloadData()
    {
        base.ReloadData();
        SetupControl();
    }

    /// <summary>
    /// Initializes the control properties
    /// </summary>
    protected void SetupControl()
    {
        if (this.StopProcessing)
        {
            // Do nothing
        }
        else
        {
            // Set BizForm properties
            viewBiz.SiteName = "MySite";
            viewBiz.FormName = "MyTestForm";
            viewBiz.AlternativeFormFullName = "BizForm.MyTestForm.Test";
            ((CMS.FormControls.EditingFormControl)viewBiz.BasicForm.FieldEditingControls["TestFormTextField"]).Value = "My text";
        }
    }
}

Removing the line...

((CMS.FormControls.EditingFormControl)viewBiz.BasicForm.FieldEditingControls["CustomField"]).Value = "your_text";

...displays the alternative form and empty text field correctly, but as soon as I add the line I get a "System.NullReferenceException: Object reference not set to an instance of an object." error.

Is there a problem that the code is trying to write to the field before it is loaded?

I never had this problem in KenticoCMS4.1 though, with the exact same code but using the DataRow function.

Thanks,
Tim

Kentico Customer Success

kentico_martind2 - 10/4/2012 7:54:33 AM

RE:Form Controls & Page_Load

Hi Tim,

I finally realize that there is the difference in method calls in v6. In the SetupControl() method the BizForm isn't initialized so add your modification after the SetupControl() method, here is a little example of method which I've tried:

protected void SetupControl()
{
...
}

protected override void OnPreRender(EventArgs e)
{

var myForm = viewBiz.BasicForm.FieldEditingControls;
if (myForm != null)
{
myForm["message"].Value = "test";
}

base.OnPreRender(e);
}

Please, don't forget to test your Form to the null value.

Best regards,
Martin Danko

Member

tspring-allegra - 10/4/2012 8:58:01 AM

RE:Form Controls & Page_Load

Hi Martin,

That did the trick!

Though I did have to reference "CMS.FormControls.EditingFormControl" as in your original solution, otherwise it gave me a "no definition for 'Value'" error.

So I ended up with the combined version:

protected override void OnPreRender(EventArgs e)
{
if (viewBiz.BasicForm.FieldEditingControls != null)
{
((CMS.FormControls.EditingFormControl)viewBiz.BasicForm.FieldEditingControls["TestTextbox"]).Value = "Testing";
}

base.OnPreRender(e);
}

...which works perfectly.

Thanks again!!

Tim


Kentico Customer Success	kentico_martind2 - 10/4/2012 3:29:58 PM RE:Form Controls & Page_Load Hi Tim, I'm very proud of you! It's great that you finally realize to combine previous examples into one functional method. This solution is also your work :) Best regards, Martin Danko