access value of dynamically created textbox in grid

Question

Hello

 

I added columns dynamically to gridview at run time and have added textboxs to  every column using row data bound.

but now when i try to get this value in another button click i get null reference error.

I know that as pageload do not retains values ,i am not getting the required result.but what is solution on it?

here is my code..

protected void gv_RowDataBound(object sender, GridViewRowEventArgs e)

{

if (e.Row.RowType == DataControlRowType.DataRow)

{

for (int i = 0; i < 6; i++)

{

TextBox txt = new TextBox();

txt.CssClass = "SmallTextBoxDate";

txt.ID = "TextBox" + (i).ToString();

if (dt != null && dt.Rows.Count > 0)

{

{

         txt.Text = dt.Rows[e.Row.RowIndex][i - 1].ToString();

}

}

e.Row.Cells[i].Text = "";

e.Row.Cells[i].Controls.Add(txt);

}

}

}

}

protected void btnAdd_Click(object sender, EventArgs e)

{

 

    string A=(((TextBox)gvrItem.FindControl("txtE")).Text).tostring();//Here I m getting null value

} 

please help