How to retain value between postbacks

timer Asked: Jul 14th, 2013

Question description

I am dynamically creating textboxes and adding it to the gridview.When i edit the textbox and update it the value is lost.Please help me out This is what i have done so far.

 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 headertext = this.GridView1.Columns[1].HeaderText;
        string id = GridView1.Rows[getindex].Cells[4].Text;
        //DataTable dtfrweekend = new DataTable();
        //SqlCommand cmdfrgetweekend = new SqlCommand("select s001_Weekending as Weekend from dbo.s001_Timesheets where s001_TimesheetsID ='" +id+ "' ", connfordata);
        //SqlDataAdapter dafrweekend = new SqlDataAdapter(cmdfrgetweekend);
            TextBox txtmonday = new TextBox();
            string get = GridView1.HeaderRow.Cells[3].Text.ToString();
            BoundField bf = new BoundField();
            bf.DataField = "Monday";
            txtmonday.Text = GridView1.Rows[getindex].Cells[3].Text;
When i click on update it postbacks and value is lost.below is snippet of update.Please help now anyone 

   protected void btnupdate_Click(object sender, EventArgs e)
            int index = GridView1.EditIndex=-1;
            TextBox txtmonday = new TextBox();
            //string get = txtmonday.Text;
            //TextBox tbfrreplace = new TextBox();
            Button btn = (Button)sender;
            GridViewRow gvr = (GridViewRow)btn.NamingContainer;
            int getindex = gvr.RowIndex;
            BoundField bf2 = new BoundField();
            bf2.DataField = "Monday";
            string monday =   txtmonday.Text;
        //tbfrreplace.Text = GridView1.Rows[getindex].Cells[3].Text;
         //TextBox tbfrreplace1 = GridView1.FindControl("txtmonday") as TextBox;
        // GridView1.Rows[getindex].Cells[3].Controls.Add(tbfrreplace1);

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