How to bind data from textboxes to a datagridview?

Add this to your code behind

protected List<Control> listOfControls;

protected string GetTextValue()
{


TextBox textbox = (TextBox)Page.FindControl("textbox");
return textbox.Text;
}


protected void Button1_Click(object sender, EventArgs e)
{

// you can improve this but you can get the idea, this would change the cell on row three
// for row one do 1 etc, this should be re-factored
TextBox txt = (TextBox)FindControlRecursive(GridView1, "mygrdviewtext",3);

txt.DataBind();
}

public Control FindControlRecursive(Control Root, string Id, int row)
{


listOfControls = new List<Control>();

FindControlRecursive(Root, Id);

return listOfControls[row -1];
}


public Control FindControlRecursive(Control Root, string Id)
{
if (Root.ID == Id)
{
listOfControls.Add(Root);
}

foreach (Control Ctl in Root.Controls)
{
Control FoundCtl = FindControlRecursive(Ctl, Id);

if (FoundCtl != null)
{
listOfControls.Add(FoundCtl);

}
}

return null;
}


// in your aspx page add something like this to your gridview , where the cell is, again change as it applies to you.

<asp:TemplateField HeaderText="fromtextbox">
               <ItemTemplate>
                           <asp:TextBox ID="mygrdviewtext" runat="server" Text='<%# GetTextValue() %>' />
                </ItemTemplate>
               </asp:TemplateField>