CODEWITHSUNDEEP
c#forms
Jacob W.
Jacob W.

Reputation: 3

How do I pass more than one variable to a form in C#

I am able to pass one variable to a second form from a first main form using the code below: Form 1:

public void PJRating_Click(object sender, RoutedEventArgs e)
{

    //This block reads in user text box submissions
    mys = Convert.ToDouble(MYS.Text);
    tubeOD = Convert.ToDouble(TubeOD.Text);
    tubeID = Convert.ToDouble(TubeID.Text);
    tjOD = Convert.ToDouble(TJOD.Text);
    adjTens = ((Math.Pow(((((tubeOD - tubeID) * 0.95) + tubeID)), 2) - Math.Pow(tubeID, 2)) * (Math.PI / 4)) * (mys * Math.Pow(10, 3));

    //Diplay the new window
    PupJointRating newTensileRating = new PupJointRating(adjTens);
    newTensileRating.Show();
}

Form 2:

public PupJointRating(double adjTens)
{

    InitializeComponent();
    Convert.ToString(adjTens);
    string tensCap = String.Format("{0:N0}", adjTens);
    DisplayTensCap.Text = tensCap;
}

This code works for displaying the "adjTens" variable from the first form on the second form. However, there are other variables from this first form that I want to display on the second form and I cannot figure out how to do this. Any help would be much appreciated.

Upvotes: 0

Views: 69

Answers (3)

Andrii Tsok
Andrii Tsok

Reputation: 1446

Better way is to declare some data transfer class, for instance:

public class SecondFormParams
{
    public string ArgumentOne {get;set;}
    public string ArgumentTwo {get;set;}
}

Add this as argument for second forms:

public PupJointRating(SecondFormParams secondFormParams)
{
    InitializeComponent();
    string tensCap = String.Format("{0:N0}", secondFormParams.ArgumentOne);
    DisplayTensCap.Text = tensCap;
    //Do something with other params, like: secondFormParams.ArgumentTwo
}

And populate this object with params and then show the second form:

public void PJRating_Click(object sender, RoutedEventArgs e)
{
    // Init your transfer object
    var sfp = new SecondFormParams();

    //This block reads in user text box submissions
    mys = Convert.ToDouble(MYS.Text);
    tubeOD = Convert.ToDouble(TubeOD.Text);
    tubeID = Convert.ToDouble(TubeID.Text);
    tjOD = Convert.ToDouble(TJOD.Text);
    sfp.ArgumentOne = ((Math.Pow(((((tubeOD - tubeID) * 0.95) + tubeID)), 2) - Math.Pow(tubeID, 2)) * (Math.PI / 4)) * (mys * Math.Pow(10, 3));
    sfp.ArgumentTwo = "Yo man, do something with me on the next form";
    //Diplay the new window
    PupJointRating newTensileRating = new PupJointRating(sfp);
    newTensileRating.Show();
}

Using this approach you can easily define some additional properties for transfer object and pass this without changing arguments for second form.

Upvotes: 0

sab669
sab669

Reputation: 4104

You have two options. You could expand your current Form2 constructor like so:

public PupJointRating(double adjTens, double secondParam)
{
    InitializeComponent();
    Convert.ToString(adjTens);
    string tensCap = String.Format("{0:N0}", adjTens);
    DisplayTensCap.Text = tensCap;
    //do something with secondParam
}

And then in your first form you'd do something like this:

PupJointRating pjr = new PupJointRating(myDoubleVar, myOtherDoubleVar);

Or you can simply just add a second constructor with additional arguments as described above. Doing this gives you the option of creating a PupJointRating object with either just one single argument passed to it, or two:

var pjr1 = new PupJointRating(myDoubleVar);
var pjr2 = new PupJointRating(myDoubleVar, myOtherDoubleVar);

Both of those would then be valid lines of code and give you an object.

This is called member overloading and is both very common, and very useful.

Upvotes: 1

user0727
user0727

Reputation: 66

You can add more arguments to the constructor of Form2. For example:

public PupJointRating(double adjTens, int arg1, string arg2)
{
    InitializeComponent();
    Convert.ToString(adjTens);
    string tensCap = String.Format("{0:N0}", adjTens);
    DisplayTensCap.Text = tensCap;
    //Do something with arg1, arg2
}

Then call it by passing additional arguments:

int myInt= 0;
string myString = string.Empty;

//...

//Diplay the new window
PupJointRating newTensileRating = new PupJointRating(adjTens, myInt, myString);
newTensileRating.Show();

Upvotes: 3

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