How to pass variable to another form

Question

0.00/5 (No votes)

See more:

Hi Sir/Madam,

I am uday
In csharp winform application,how i to pass login id to another form,after successfull login?.

My code for login button is like this

C#

if (rowsCount > 0)          // IF USER IS VALID
                      {
                          string userName = txtUserNm.Text;
                          int loggeduserId=Convert.ToInt32(ds.Tables["UserLogin"].Rows[0][0]);

    

                          
                          this.Hide();
                          MDIParent menu = new MDIParent();

                          this.DialogResult = DialogResult.OK;


                      }
                      else
                      {
                          MessageBox.Show("You are not valid user", "alert", MessageBoxButtons.OK, MessageBoxIcon.Error);

                      }

in above code loggeduserId i have to pass other all forms.

how it can achieved? Is their session like concept in c sharp winform?

Thanks in advance.............

Posted 8-Sep-11 1:47am

udusat13

Add a Solution

5 solutions

Solution 1

No there is no concept like Session.
You can make a class with public access modifier and in this class use properties to access in other forms...

Posted 8-Sep-11 1:49am

Suresh Suthar

Solution 2

No there is no session avaiable in C# but you can use properties to pass information from one form to another.
Also, untidy method is to use static variable.

Posted 8-Sep-11 1:50am

nagendrathecoder

v2

Solution 3

simple steps for you::

1.create a property where you want to access the login name
2.create object for the form where you create the property
3.assign value to your property after successfull login
4.there in that page access the property

its simple

Posted 8-Sep-11 1:59am

hitech_s

Comments

udusat13 8-Sep-11 8:04am

Thanks..
But i have use setter getter.

After Successfull login i have set login id.then close the login form.when i try to access that variable again.it shows null value.

Solution 5

Simply, you can create a public/protect static property on to your MDIParent form and then access from any form. Thanks

Posted 2-Oct-11 21:56pm

Elias.net

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)

Md. Rashim Uddin · Accepted Answer · 2011-09-08T06:48:00

This is Pretty Easy enough.

Create a Singleton class like this

C#

public class LoggedInfo
    {
        static LoggedInfo instance = null;

        public string UserId { get; set; }

        public string UserName { get; set; }

        static readonly object padlock = new object();

        LoggedInfo()
        {
        }

        public static LoggedInfo Instance
        {
            get
            {
                lock (padlock)
                {
                    if (instance == null)
                    {
                        instance = new LoggedInfo();
                    }
                    return instance;
                }
            }
        }
    }

You might set this property from your login form like this

C#

LoggedInfo li = LoggedInfo.Instance;
li.UserId = this.textBox1.Text;

And from any form in your project you might get the value of this property like this,

C#

string userId=LoggedInfo.Instance.UserId;