How I Used Multiple Checkboxes In If Condition In Another Form In C#

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i have form 1 that have eight Checkboxes and one text box and one button that when i write number in this text he print its details in crystal report when i checked 2 or 3 or 4 or 8 checked in this checkbox. and i need create select for each checked box

code in the form one is :-

C#

public partial class FRM_RPT_CAR_Details : Form
{

    public FRM_RPT_CAR_Details()
    {
        InitializeComponent();
    }


    private void button1_Click(object sender, EventArgs e)
    {
        RPT.FRM_RPT_CAR_ID frm = new RPT.FRM_RPT_CAR_ID(txt_Car_id.Text);
        frm.Show();
    }
}

in form 2 :- that have a crystalReportViewr

C#

public partial class FRM_RPT_CAR_ID : Form
    {
        int x;

        SqlConnection con = new SqlConnection("Server= .; Database= WhiteWhaleDB; Integrated Security = true");
        SqlCommand sd;
        SqlDataReader sda;
        string s;

        public FRM_RPT_CAR_ID()
        {
            InitializeComponent();
        }

        public FRM_RPT_CAR_ID(string x)
        {
            InitializeComponent();

            this.x = int.Parse(x);
        }

        private void FRM_RPT_CAR_ID_Load(object sender, EventArgs e)
        {
            FL.FRM_RPT_CAR_Details frm = new FL.FRM_RPT_CAR_Details();
            if (frm.checkBox_Tashhem.Checked)
            {
                s = "select s1.Car_id,  convert(varchar,s1.Change_date,101) as Change_date, Service_Type.Servce_desc,s1.Current_dist, s1.Prev_distance as Prev_dist, (s1.Current_dist - s1.Prev_distance) as Change_dist ,s1.value_Tashhem as Value from Tashhem s1 INNER JOIN Service_Type ON s1.Servce_id = Service_Type.Servce_id where s1.Car_id =" + x;
                DataSet_Car_id ds = new DataSet_Car_id();
                SqlDataAdapter dataAdapter = new SqlDataAdapter(s, con);
                dataAdapter.Fill(ds.Tables["Car_Details"]);
                CrystalReport_Car_id report = new CrystalReport_Car_id();
                report.SetDataSource(ds.Tables["Car_Details"]);
                crystalReportViewer_Car_id.ReportSource = report;
                crystalReportViewer_Car_id.Refresh();
            }
}

Posted 25-Jan-16 3:42am

Member 12244977

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Comments

ZurdoDev 25-Jan-16 10:13am

I don't understand your question.

Kevin Marois 25-Jan-16 10:22am

Are you asking how to get the values from the checkboxes in one form into another form?

Member 12244977 25-Jan-16 11:10am

yes :)

Kevin Marois 25-Jan-16 11:13am

Simple. Create a class that holds the checkbox values, then pass that class to the other form

Member 12244977 25-Jan-16 12:11pm

tell me how i do this please ?

Philippe Mori 25-Jan-16 21:26pm

Very bad design. Don't couple forms together in both directions. It will make the code hard to reuse in a different context.

The "easy" solution is to add parameter to the constructor of the second form and pass the information to the second form when creating it. Alternatively, you could uses properties instead of constructors arguments.

In fact, you already pass the id to the constructor. It would not be hard to pass more information.

Better solution is to use a third class for data particularly if you have more than 2 or 3 fields.

Member 12244977 26-Jan-16 2:51am

i'm beginner and i try do that but i can't, please tell me how i do this and thank you for help

Philippe Mori 26-Jan-16 8:53am

One way is to add a new class to your project...

Think of it this way: how can I use the second form is the first one is not created...

Member 12244977 26-Jan-16 9:30am

i'm try but i can't so please write the code , explain it and thank you for help

Philippe Mori 26-Jan-16 10:33am

This is trivial stuff. If you cannot even understant that, the read some beginner book on C#...

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

BillWoodruff · Answer 1 · 2016-01-25T12:22:00

In the Form with the CheckBoxes:

0. define as Public a Dictionary<string,CheckState> named 'ChkBoxToChkState:

public Dictionary<string,> ChkBoxToChkState;

0.a. initialize that Dictionary in the Form Load Event

C#

private void Form2_Load(object sender, EventArgs e)
{
   ChkBoxToChkState = new Dictionary<string, CheckState>
   {
       {checkBox1.Name, checkBox1.CheckState},
       {checkBox2.Name, checkBox2.CheckState},
       {checkBox3.Name, checkBox3.CheckState},
       // continue for all CheckBoxes
   };
}

1. in the Form Design view: select all the CheckBoxes

1.a. use F4 to open the Property Browser, click the Events tab

1.b. click on the 'CheckStateChanged entry to automatically generate an Event Handler in your code that will look like this:

C#

private CheckBox currentCheckBox;
private void checkBox1_CheckStateChanged(object sender, EventArgs e)
{
    currentCheckBox = sender as CheckBox;
    ChkBoxToChkState[currentCheckBox.Name] = currentCheckBox.CheckState;
}

In the Form that will need to evaluate the state of the CheckBoxes:

0. assume you have created an instance of the Form with the CheckBoxes named 'CBForm, and that it has been shown ... i.e., you can be sure the Dictionary on that Form is properly instantiated.

1. write the method that evaluates the CheckBoxes:

C#

private void EvaluateForm2CheckBoxState()
{
    var cBoxState = CBForm.ChkBoxToChkState;

    if (cBoxState == null) return;

    if(
        cBoxState["checkBox1"] == CheckState.Checked
        && cBoxState["checkBox2"] == CheckState.Checked
    )
    {
        // rule #1 ....
        // do something
        Console.WriteLine("rule 1");
    }
    else if(false) // if(?) ... another test
    {
        Console.WriteLine("rule ?");
    }
    else // final test
    {
        Console.WriteLine("final rule ?");
    }
}

Note the choice made here: to use Type 'string as the Key in the Dictionary: that means the user (you) cannot change the CheckBoxes CheckState from outside the CheckBox Form.

If you need the ability to change the CheckState, from the Main Form, then you could use the CheckBoxes as the Key in the Dictionary.

Note also the assumption here that accessing the values of the CheckBoxes is done "on demand," rather than being triggered by some user-action (like changing the CheckState Value in a CheckBox in the Form with the CheckBoxes).

How I Used Multiple Checkboxes In If Condition In Another Form In C#

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