How to pass string from one form to another form for Visual C#

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Hello. Here is the problem

Form 2

 private string data;

private void btnOK_Click(object sender, EventArgs e)
        {
            data=txtDB.Text; //set data
            this.Hide();
        }

        public string getData()
        {
            return data;
        }

Form 1

Form2 frm = new Form2();
string data = frm.getData(); //get data from Form2
 MessageBox.Show(data);

The messagebox is empty. How to make sure the data is passing

Posted 10-Oct-13 17:35pm

arave0521

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Comments

Ron Beyer 10-Oct-13 23:43pm

Where do you show the form to let the user enter the data?

arave0521 10-Oct-13 23:59pm

In form2.
FORM2(schemaName)

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace DynamicSimulator_v2
{
public partial class SchemaName : Form
{
private string data;

public SchemaName()
{
InitializeComponent();
}

private void btnCancel_Click(object sender, EventArgs e)
{
this.Hide();
}

private void btnOK_Click(object sender, EventArgs e)
{
data=txtDB.Text;
this.Hide();
}

public string getData()
{
return data;
}

}
}

FORM1(frmMain)

namespace DynamicSimulator_v2
{
public partial class frmMain : Form
{
public frmMain()
{
InitializeComponent();
}

private void btnExit_Click(object sender, EventArgs e)
{
Application.Exit();
}

private void btnNew_Click(object sender, EventArgs e)
{
string data = frm.getData(); //get data from Form2
SchemaName schemaForm = new SchemaName();
if (schemaForm.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
MessageBox.Show(data);
string connStr = "datasource=localhost;port=3306;username=root;password=root;";
MySqlConnection conn = new MySqlConnection(connStr);
try
{
conn.Open();
MySqlCommand cmdDatabase = new MySqlCommand("CREATE SCHEMA @schema; ", conn);
cmdDatabase.Parameters.AddWithValue("@schema",data);
MySqlDataReader myReader;
myReader = cmdDatabase.ExecuteReader();
myReader.Close();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
conn.Close();

}
}
}
}

ArunRajendra 10-Oct-13 23:44pm

Are you showing form2 inside form1? if so put that code.

arave0521 10-Oct-13 23:58pm

FORM2(schemaName)

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace DynamicSimulator_v2
{
public partial class SchemaName : Form
{
private string data;

public SchemaName()
{
InitializeComponent();
}

private void btnCancel_Click(object sender, EventArgs e)
{
this.Hide();
}

private void btnOK_Click(object sender, EventArgs e)
{
data=txtDB.Text;
this.Hide();
}

public string getData()
{
return data;
}

}
}

FORM1(frmMain)

namespace DynamicSimulator_v2
{
public partial class frmMain : Form
{
public frmMain()
{
InitializeComponent();
}

private void btnExit_Click(object sender, EventArgs e)
{
Application.Exit();
}

private void btnNew_Click(object sender, EventArgs e)
{
string data = frm.getData(); //get data from Form2
SchemaName schemaForm = new SchemaName();
if (schemaForm.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
MessageBox.Show(data);
string connStr = "datasource=localhost;port=3306;username=root;password=root;";
MySqlConnection conn = new MySqlConnection(connStr);
try
{
conn.Open();
MySqlCommand cmdDatabase = new MySqlCommand("CREATE SCHEMA @schema; ", conn);
cmdDatabase.Parameters.AddWithValue("@schema",data);
MySqlDataReader myReader;
myReader = cmdDatabase.ExecuteReader();
myReader.Close();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
conn.Close();

}
}
}
}

VICK 11-Oct-13 0:22am

Have you tried session or query string???

5 solutions

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Rakesh Meel · Answer 1 · 2013-10-10T18:13:00

Solution 4

visit here...

http://www.c-sharpcorner.com/forums/thread/154204/how-to-pass-a-string-from-one-form-to-another.aspx[^]

Posted 10-Oct-13 18:13pm

Rakesh Meel

Deepak Kr Choudhary · Answer 2 · 2013-10-10T18:56:00

C#

public static string str="";

       private void button1_Click(object sender, EventArgs e)
       {
           str = textBox1.Text;
           
           this.Hide();

       }
       public string getdata()
       {
           return str;
       }

form2

C#

Form1 f = new Form1();
           label1.Text =f.getdata();

Madhu Nair · Answer 3 · 2013-10-10T17:56:00

Solution 1

Create a Class with Static property getData and set the value. Then you will be able to access this value any where in the application

Posted 10-Oct-13 17:56pm

Madhu Nair

Comments

arave0521 11-Oct-13 0:00am

May I know how to set it as property. Quite new in c#.net

[no name] 11-Oct-13 0:06am

why do you hang out with property? just use internal access specifier before variable...simple..

Dinesh92 · Answer 4 · 2013-10-10T18:01:00

Solution 2

use C#

internal string
datatype associated with

C#

data

copy contents from data to another string.
You are getting error because data is private.

e.g

C#

private string data=user.txt;
internal string s=data;

internal datatype can be used anywhere within same namespace.

Posted 10-Oct-13 18:01pm

Dinesh92

Madhu Nair · Answer 5 · 2013-10-10T18:05:00

Solution 3

Example of class with Static Property -

C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Common
{
    public class Common
    {
        public static string getData
        { get; set; }
    }
}

After creating the class you can access or set value of the property any where in your application using -

C#

Common.getData="TEST";

Posted 10-Oct-13 18:05pm

Madhu Nair

Comments

ArunRajendra 11-Oct-13 0:31am

When you want to change the solution use "Improve solution" option. Don't post it as new solution.

Madhu Nair 11-Oct-13 0:53am

Whose solution you want me to improve?

How to pass string from one form to another form for Visual C#

5 solutions

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