how to get value from dynamically created textbox in asp.net - asp.net

Question

hi i'm Cannot get value dynamically created textbox and save into database. plz help
his is code which I have created in this code text box are created but when I will input the value in the text and retrieve the value from dynamically created text box it give error
protected void btnAtt_Click(object sender, EventArgs e)
{
int DPLID = int.Parse(DPLCategory.Text);
var query = (from p in database.tbl_Attributes
where p.ProductTypeId_FK == DPLID
select new
{
p.Attribute_Id,
p.AttributeName,
p.ProductTypeId_FK,
}).ToArray();
for (int i = 0; i < query.Count(); i++)
{
Label lblatt = new Label();
lblatt.ID = query[i].AttributeName;
lblatt.Text = query[i].AttributeName + " : ";
lblatt.CssClass = "control-label";
TextBox txtatt = new TextBox();
txtatt.ID = "txtatt"+i;
txtatt.Attributes.Add("runat", "server");
txtatt.Text = String.Empty;
txtatt.CssClass = "form-control input-sm";
HtmlTextWriterTag.Br.ToString();
Place1.Controls.Add(lblatt);
HtmlTextWriterTag.Br.ToString();
Place1.Controls.Add(txtatt);
HtmlTextWriterTag.Br.ToString();
}
}
protected void lbtnSave_Click(object sender, EventArgs e)
{
int DPLID = int.Parse(DPLCategory.Text);
var query = (from p in database.tbl_Attributes
where p.ProductTypeId_FK == DPLID
select new
{
p.Attribute_Id,
p.AttributeName,
p.ProductTypeId_FK,
}).ToArray();
int LastId = database.tbl_Products.Max(p => p.ProductId);
for (int i = 0; i < query.Count(); i++)
{
database.tbl_ProductValue.Add(new Models.tbl_ProductValue()
{
ProductId_FK = LastId,
AttributeID_FK = query[i].Attribute_Id,
ProductValue = ??,
});
database.SaveChanges();
}
}
plz help me for how to get textbox?

Answer 1

I haven't worked with WebForms in a while but you can access the controls by their IDs like this:
ProductValue = ((TextBox)FindControl("txtatt" + i)).Text;