Question

hello all
i really need your help its my final project in university
i have to make matrix of text boxs that the user chosse the size of it
but i dont know after i create it how do i refer to the textbox so i can do the calculation
and how do i change the type .
thats the code i made to get textbox at run time
i hope you help me
C# code

private void button1_Click(object sender, EventArgs e)
    {

        //TextBox tb = new TextBox();

        int y = 10;
         row = Convert.ToInt32(textBox1.Text);
        int col = row;
        //string []a = new string[row];
        int count = 0;
        int sum;
        for (int i = 0; i < row; i++)
        {
            int x = 10;

            for (int j = 0; j < col; j++)
            {
                 t = new TextBox();
                t.Size = new Size(50, 20);
                t.Name = "tb" + count;
                count++;
                t.Location = new Point(x, y);
                t.Visible = true;


                //t.GetType();
                //a[row] = t.Text;

                Controls.Add(t);
                x = x + 70;
                //t.Text =Convert.ToDecimal(t.Text);
                //Convert.ToDecimal(t.Text);
                if (t.Name == "tb1")
                    t.Text = "10";
            }
            y = y + 25;
        } 

Answer 1

Keep a reference to each TextBox (you can store it in a two-dimension array, for example):

// Defined at the Form level
private TextBox[,] textBoxes = new TextBox[10, 10];

...

// When creating the TextBox
t = new TextBox();

...

// Store the reference
textBoxes[i, j] = t;

...

Later you can get the value:

var text = textBoxes[row, col].Text;