Problem with ShowDialog() method in C#.

Question

0.00/5 (No votes)

See more:

I want to call a form to another form, but I want the calling form shows like dialog box(not resizing). I passing parameter to my new_customer form's constructor.
so My code is :-

new_customer NC = new new_customer(null);
            NC.ShowDialog();

My new_customer form constructor :-

C#

public new_customer(string formType="save")
       {
           InitializeComponent();
           DC = new Data_Conn(Application.StartupPath);
           DC1 = new Data_Conn(Application.StartupPath);
           paraModi = formType;
       }

Problem is when I call new_customer form from another form, its constructor doesn't execute,that's why I get an error when I use that variable :

Object reference not set to an instance of an object.

thanks In advanced ..

Posted 11-Jul-13 3:13am

JayantaChatterjee

Add a Solution

Comments

[no name] 11-Jul-13 9:42am

How is it that you know that your constructor is not called? Did you run your code in the debugger? What line of code is giving you the "Object reference not set to an instance of an object" error? Are you getting any other exceptions that is causing your form constructor to fail?

JayantaChatterjee 11-Jul-13 9:52am

thanks for quick reply..
I passing null value to my parameter that's why I'm getting error(as said @jokler.007)....

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

User 8696850 · Accepted Answer · 2013-07-11T03:41:00

hello,

You are sending null to the second form try:

C#

new_customer NC = new new_customer("save");//the string that you need to sent
            NC.ShowDialog();

on the new_customer form :

C#

  public partial class new_customer: Form
    {
string formType;

public new_customer(string formType)//formType=save that you have sent
       {
           this.formType=formType;
           InitializeComponent();
           DC = new Data_Conn(Application.StartupPath);
           DC1 = new Data_Conn(Application.StartupPath);
           paraModi = formType;
       };
    }