CODEWITHSUNDEEP
c#winformsdatagridview
JEricaM
JEricaM

Reputation: 824

How to write in a DataGridView from a different class

I have a Form1, with a DataGridView2 in it.

I want to use this DataGridView in a different class (Class1), that will insert in my DataGridView some data that I take from a database. (In this Class1 I have the connection to this database). The code of my Class1, for the extraction of the data from the DB is:

var context = new dbGAPEntities();
BindingSource bi = new BindingSource();
bi.DataSource = context.clienti.ToList();
dataGridView2.DataSource = bi;
dataGridView2.Refresh();

But I can't do this because, in this class, I don't have dataGridView2. How can I do to reference in my class1, the DataGridView from Form1?

I hope that my problem is clear.

I tried other questions related to this problem, but I have not been of any help.

Upvotes: 2

Views: 4885

Answers (3)

M. A. Cordeiro
M. A. Cordeiro

Reputation: 479

An option would be to pass you DataGridView as a ref parameter. However I recommend to pay close attention to your architecture, User interface (DataGridView) shouldn't be referenced in your data access layer.

Private void GridBind(ref DataGridView dgv){
  var context = new dbGAPEntities();
  BindingSource bi = new BindingSource();
  bi.DataSource = context.clienti.ToList();
  dgv.DataSource = bi;
  dgv.Refresh();

}

You can perform GridBind method doing something like that:

GridBind(ref DataGridView1);
GridBind(ref DataGridView2);

Upvotes: 1

ivayle
ivayle

Reputation: 1070

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();

        Class1.BindGridDataSource(this.dataGridView2);
    }
}

public static class Class1
{
    public static void BindGridDataSource(DataGridView grid)
    {
        // Bind grid to data source
    }
}

Upvotes: 1

Wudge
Wudge

Reputation: 357

You could add a function to your class that fills the DataGridView like this:

public void FillDataGridView(DataGridView dgv)
{
    var context = new dbGAPEntities();
    BindingSource bi = new BindingSource();
    bi.DataSource = context.clienti.ToList();
    dgv.DataSource = bi;
    dgv.Refresh();
}

and call it like this:

class1.FillDataGridView(this.DataGridView2);

Or you can add a property to your class like this:

public BindingSource BindSrc
{
    get
    {
        var context = new dbGAPEntities();
        BindingSource bi = new BindingSource();
        bi.DataSource = context.clienti.ToList();
        return bi;
    }
}

And in your Form:

dataGridView2.DataSource = class1.BindSrc;
dataGridView2.Refresh();

Upvotes: 0

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