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How do I store two dimensional array using session in ASP.NET?

Petr Jaroš asked:

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I need to store two dimensional array in Session that is in int originaly and then I need to retrieve from the Session. Is some way? I can not solve that for so long. It does not work and it says:
System.InvalidCastException: Unable to cast object of type 'System.Web.UI.WebControls.Label' to type 'System.Int32[,]'.

What I have tried:

I have tried everything but I can not figure that out.

Random rnd = new Random();
      int r = Convert.ToInt32(pocetR.Text);
      int s = Convert.ToInt32(pocetS.Text);
      int[,] MaticeA = new int[r, s];

      int[,] MaticeB = new int[r, s];

      for (int j = 0; j < s; j++)
          for (int i = 0; i < r; i++)
              int ko = rnd.Next(-50, 50);

              MaticeA[i, j] = ko;

              maticeA.Text = maticeA.Text + MaticeA[i ,j].ToString();
              maticeA.Text = maticeA.Text + " ";
              Session["MA"] = Session["MA"] + ' '.ToString();
          maticeA.Text = maticeA.Text + "<br />";
          Session["MyArray"] = maticeA;

      for (int j = 0; j < s; j++)
          for (int i = 0; i < r; i++)
              MaticeB[i, j] = rnd.Next(-50, 50);
              maticeB.Text = maticeB.Text + MaticeB[i, j].ToString();
              maticeB.Text = maticeB.Text + " ";
          maticeB.Text = maticeB.Text + "<br />";


  protected void vypocitat_Click(object sender, EventArgs e)

      int[,] fromSession = (int[,])Session["MyArray"];

      lblV.Text = fromSession[0, 1].ToString();

Tags: C#, ASP.NET


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