how to assign a dynamic textbox on edit click button in gridview using overide viewstate The Problem is that the textbox appears at a different location

protected override object SaveViewState()
{
    var viewState = new object[2];
    //Saving the dropdownlist value to the View State
    viewState[0] = txtmonday.Text;
    return viewState;
}

protected override void LoadViewState(object savedState)
{
    //Getting the dropdown list value from view state.
    if (savedState is object[] && ((object[])savedState).Length == 2)
    {
        var viewState = (object[])savedState;
        //var count = int.Parse(viewState[0].ToString());
        CreateDynamicControl();
        base.LoadViewState(viewState[1]);//cheged from 1 to 0
    }
    else
    {
        base.LoadViewState(savedState);
    }
}


public void CreateDynamicControl()
{
    var txtmonday1 = new TextBox();
    var textboxCell = new TableCell();
    var tableRow = new TableRow();
    tableRow.Cells.Add(textboxCell);
    textboxCell.Controls.Add(txtmonday1);
    tbl.Rows.Add(tableRow);
   // txtmonday1 = (TextBox)txtmonday1;
   // int count = GridView1
   // GridView1.Controls.Add(txtmonday1);



}

protected void btnupdate_Click(object sender, EventArgs e)
{




    foreach (TableRow row in tbl.Rows)
    {
        var textbox = row.Cells[0].Controls[0] as TextBox;
    }





}



protected void btnedit_Click(object sender, EventArgs e)
{

   // txtmonday.ID = "txtmonday1";
    int index = GridView1.EditIndex;

    Button btn = (Button)sender;


    GridViewRow gvr = (GridViewRow)btn.NamingContainer;

    int getindex = gvr.RowIndex;


    string id = GridView1.Rows[getindex].Cells[4].Text;



        TextBox txtmonday = new TextBox();
        txtmonday.ID = "Textbox1";
        string get = GridView1.HeaderRow.Cells[3].Text.ToString();


        txtmonday.Text = GridView1.Rows[getindex].Cells[3].Text;
        Page.Form.Controls.Add(txtmonday);
        GridView1.Rows[getindex].Cells[3].Controls.Add(txtmonday);

}