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Two dimensional array of textboxes

Hi,

I want to have a 2dimensional array of textboxes ...
I wrote this code..( learning C# so pls be patient)

for (int x = 0; x<8; x++)
                  for (int i = 0; i<8; i++)
                  {

                        System.Windows.Forms.TextBox[][]tb ;
----------------->            tb[x][i]= new System.Windows.Forms.TextBox();
                        tb[x][i].Text = "";
                        tb[x][i].TabIndex = i;
                        tb[x][i].Size = new System.Drawing.Size(20,20);
                        tb[x][i].Location = new System.Drawing.Point(x*70, i*25);
                        tb[x][i].Text = i.ToString();
                        this.Controls.Add(tb[x][i]);
                  }

ERROR: Use of unassigned local variable 'tb'

How do i solve this

devsolns

System.Windows.Forms.TextBox[][]tb ; <---just a reference to nothing.

need to make,
int size = 50;
System.Windows.Forms.TextBox[][]tb = new System.Windows.Forms.TextBox[size][];

devsolns

Alternatives as well,

//Framework 1.1
ArrayList list = new ArrayList();
list.Add(new System.Windows.Forms.TextBox());

//Framework 2.0
System.Collections.Generic.List<System.Windows.Forms.TextBox> = new List<System.Windows.Forms.TextBox>();
list.Add(new System.Windows.Forms.TextBox());

I would still learn to use arrays though. They are a critical element in comptuer science.

pai_prasad

ASKER

i tried that ...
System.Windows.Forms.TextBox[][]tb = new TextBox[8][];

it gives error: Object reference not set to an instance of an object. on

tb[x][i].Text = "";

devsolns

see your not using a 2 dimensional array, your using an array of an array

int size = 50;
System.Windows.Forms.TextBox[][]tb = new System.Windows.Forms.TextBox[size][];

int size2 = 2;
tb[0] = new System.Windows.Forms.TextBox[size2];

2d array looks like System.Windows.Forms.TextBox[,] tb = new System.Windows.Forms.TextBox[,] {{new System.Windows.Forms.TextBox(), new System.Windows.Forms.TextBox()}, {new System.Windows.Forms.TextBox(), new System.Windows.Forms.TextBox()}}

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pai_prasad

ASKER

thanks for the answer,,

but how do i add a text_changed event listener and retrieve the value
any links for that?

devsolns

are you kidding me, he took my answer and pasted it in code. wonderful.