Hi
i create dynamically 2 textbox, a label and a button. The purpose is to show the sum of the 2 textbox in the label when clicking on the first button (created from Toolbox).
It works, but i get an error in line foreach (TextBox t in txt) (the name 'txt' doesn't exist in this context).
Another question is: why gives Form1.Controls.Add(..) the error "an object reference is required") (must be Controls.Add(..) ) while panel1.Controls.Add(..) doesn't?
Thanks a lot.
private void button1_Click(object sender, EventArgs e)
{
int pointX = 30;
int pointY = 40;
panel1.Controls.Clear();
TextBox[] txt = new TextBox[2];
for (int i = 0; i < 2; i++)
{
txt[i] = new TextBox();
txt[i].Name = "txt" + i.ToString();
txt[i].Location = new Point(pointX, pointY);
panel2.Controls.Add(txt[i]);
pointY += 30;
}
Button bt = new Button();
bt.Name = "button2";
bt.Click += button2_Click;
panel1.Controls.Add(bt);
bt.Location = new Point(30, 30 * (aantal + 1) + 20);
bt.Text = "sum";
lbl.Location = new Point(120, 30 * (aantal + 1) + 25);
panel1.Controls.Add(lbl);
}
private void button2_Click(object sender, EventArgs e)
{
int sum = 0;
foreach (TextBox t in txt)
{
sum += Convert.ToInt32(t.Text);
}
lbl.Text = sum.ToString();
}