Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

I am getting this error -

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

On this line of code -

lblFirstName.Text = txtboxFirstName.Text.ToString();

Open in new window


Any idea on what is wrong or how I should resolve this?
thinklingsAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

thinklingsAuthor Commented:
This is the entire function, if needed -

 protected void Wizard1_ActiveStepChanged(object sender, EventArgs e)
        {

			//Pass on name from Section A to Section B
            if (Wizard1.ActiveStep.ID == "Step2")
            {
                lblFirstName.Text = txtboxFirstName.Text.ToString();
                lblLastName.Text = txtboxLastName.Text.ToString();
            }

            //Check Proof of Eligibility
            if (Wizard1.ActiveStep.ID == "Step3")   
            {
                if ((rbOption.SelectedValue="Option1") || (rbOption.SelectedValue="Option2"))
                {
                    if (txtboxRefereeName.Text == "" || txtboxROrg.Text == "" || txtboxRRole.Text == "" || txtboxREmail.Text == "" || txtboxRPhone.Text == "")
                    {
                        Wizard1.ActiveStepIndex = 1;
                        Page.ClientScript.RegisterClientScriptBlock(Page.GetType(), "Script", "alert('If you selected Option 1 OR 2, You must provide Referee Details. All fields are MANDATORY in REFEREE DETAILS section.');", true);
                    }
                    else
                    {
                        Wizard1.ActiveStepIndex = 2;
                    }
                }


                else
                    if ((rbOption.SelectedValue="Option1") || (rbOption.SelectedValue="Option2") || (rbOption.SelectedValue="Option3")))
                    {
                        Wizard1.ActiveStepIndex = 2;
                    }
                    else
                    {
                        Wizard1.ActiveStepIndex = 1;
                        Page.ClientScript.RegisterClientScriptBlock(Page.GetType(), "Script", "alert('You must provide Proof of Eligibility by selecting one option.');", true);
                    }
            }

            //Check option for Product Selection
            if (Wizard1.ActiveStep.ID == "Step4")
            {
                if (rbSelectedProduct.SelectedItem != null)
                {
                    Wizard1.ActiveStepIndex = 3;
                }
                else
                {
                    Wizard1.ActiveStepIndex = 2;
                    Page.ClientScript.RegisterClientScriptBlock(Page.GetType(), "Script", "alert('Please select your Smoke Alarm');", true);
                }
            }


            // Condition to Check one Radio button to for Payment Option
            if (Wizard1.ActiveStep.ID == "Step4")   
            {
                if (creditcard.Checked)
                {
                    if (lblAuthCode.Text.ToString() == "")
                    {
                        Wizard1.ActiveStepIndex = 2;
                        Page.ClientScript.RegisterClientScriptBlock(Page.GetType(), "Script", "alert('Your CreditCard Payment has not been done. Please process payment and complete the transaction OR select other payment option.');", true);
                    }
                    else
                    {
                        Wizard1.ActiveStepIndex = 3;
                    }
                
                
                }


                else
                    if ((cash.Checked) || (chequeMO.Checked) || (eft.Checked) || (creditcard.Checked) || (WithEvidence.Checked) || (WithoutEvidence.Checked))
                    {
                        Wizard1.ActiveStepIndex = 3;
                    }
                    else
                    {
                        Wizard1.ActiveStepIndex = 2;
                        Page.ClientScript.RegisterClientScriptBlock(Page.GetType(), "Script", "alert('Please select one option.');", true);
                    }
            }

           
        }

Open in new window

0
anarki_jimbelSenior DeveloperCommented:
Looks like one of your controls is declared but does not exist (not initialised?).
0
thinklingsAuthor Commented:
It looks like I am having this problem with the whole file and different functions within the same aspx.cs file. I don't believe it is regarding a specific control - could something else be broken or missing?
0
Cloud Class® Course: Microsoft Windows 7 Basic

This introductory course to Windows 7 environment will teach you about working with the Windows operating system. You will learn about basic functions including start menu; the desktop; managing files, folders, and libraries.

thinklingsAuthor Commented:
I am also getting the error "The name '<control name>' does not exist in the current context" on all of the controls but the application still compiles. Not sure if this helps?
0
anarki_jimbelSenior DeveloperCommented:
Strange, no idea...
0
thinklingsAuthor Commented:
Do you know how I am able to force the generation of the designer file?
0
thinklingsAuthor Commented:
Never mind, I found how.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
anarki_jimbelSenior DeveloperCommented:
No objections, of course.

But it might be useful for some people what was the problem.

Could you please share what was the problem and how did you solve it?
0
thinklingsAuthor Commented:
All sorted.
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
C#

From novice to tech pro — start learning today.