在表格之间传递参数的C＃错误

Question

let me explain the context, I have a form called "Menu" to call another form called "Bill", I'm using the Bill form to call SearchClient form. In Bill form I have a datagridview to receive "passing rows" by SearchClient form.

I call Bill by Menu button:

private void button2_Click(object sender, EventArgs e)
    {  Bill bill = new Bill();
       bill.Show();}

However, I have parameters in Bill class.

public Bill(string code, string name, string email)
    {
        InitializeComponent();
        grid.Rows.Add();
        grid.Rows[0].Cells[0].Value = code;
        grid.Rows[0].Cells[1].Value = name;
        grid.Rows[0].Cells[2].Value = email;

    }

I call the "SearchClient" form using Bill button:

private void button1_Click(object sender, EventArgs e)
    { SearchClient searchcli = new SearchClient();
        searchcli.ShowDialog();}

In SearchClient I have a button to passing rows by a datagridview to another datagridview (found in Bill)

Bill bill = new Bill(grid.SelectedRows[0].Cells[0].Value.ToString(), 
            grid.SelectedRows[0].Cells[1].Value.ToString(),
            grid.SelectedRows[0].Cells[8].Value.ToString());
            bill.Show();

When I run the programm the message error is : Error 'SisStore.Bill' does not contain a constructor that takes 0 arguments.

I know the error is here, because is missing parameters:

 private void button2_Click(object sender, EventArgs e)
    {  Bill bill = new Bill();
       bill.Show();}

But I just need pass information between Bill and SearchClient. The Menu is just a way to summon the Bill form and later SearchClient. Somebody can help me? Thanks.

Answer 1

Your Bill form should have a zero argument constructor. I suggest the following

protected Bill()
{
    InitializeComponent();
}

public Bill(string code, string name, string email): this()
{
    grid.Rows.Add();
    grid.Rows[0].Cells[0].Value = code;
    grid.Rows[0].Cells[1].Value = name;
    grid.Rows[0].Cells[2].Value = email;

}

Or you can just keep a zero argument constructor and use object initialisation instead for creating Bill

Bill bill = new Bill 
{ 
    code = grid.SelectedRows[0].Cells[0].Value.ToString(), 
    name = grid.SelectedRows[0].Cells[1].Value.ToString(),
    email = grid.SelectedRows[0].Cells[8].Value.ToString()
};

Answer 2

It doesn't look like you are using the framework quite right, but in your case, couldn't you just set the properties of Bill after you constructed it, like so:

public Bill()
{
    InitializeComponent();
}

public void init(string code, string name, string email)
{
    grid.Rows.Add();
    grid.Rows[0].Cells[0].Value = code;
    grid.Rows[0].Cells[1].Value = name;
    grid.Rows[0].Cells[2].Value = email;
}

In SearchClient:

private Bill bill;
public void setBill(Bill bill)
{
    this.bill = bill;
}

And then in Menu:

private Bill bill;
private void button2_Click(object sender, EventArgs e)
{  
    this.bill = new Bill();
    bill.Show();
}
private void button1_Click(object sender, EventArgs e)
{ 
    SearchClient searchcli = new SearchClient();
    searchcli.setBill(this.bill);
    searchcli.ShowDialog();
}

Again, in SearchClient:

... your button click function ...
{
     this.bill.init(grid.SelectedRows[0].Cells[0].Value.ToString(), 
        grid.SelectedRows[0].Cells[1].Value.ToString(),
        grid.SelectedRows[0].Cells[8].Value.ToString())
}