How to bind data to gridview from List - asp.net

Question

I have a Dto for phone numbers:
namespace Dto
{
public class PhoneNumberDto
{
public Int16 PhoneTypeId { get; set; }
public string PhoneNumber { get; set; }
}
}
and a list of this Dto:
List<PhoneNumberDto> phonenum = new List<PhoneNumberDto>();
also I have a gridview:
<table style="width: 100%">
<tr>
<td style="direction: rtl;"align="center" class="auto-style8">
<asp:UpdatePanel ID="UpdatePanelSpect1" runat="server">
<ContentTemplate>
<asp:GridView ID="GridViewCertificateType" runat="server" AutoGenerateColumns="False" CellPadding="3" OnRowCommand="GridViewCertificateType_RowCommand" OnRowDataBound="GridView1_RowDataBound" ShowFooter="True" Width="100%" Font-Names="Tahoma" Font-Size="9pt" BackColor="White" BorderColor="#CCCCCC" BorderStyle="None" BorderWidth="1px">
<Columns>
<asp:TemplateField>
<HeaderTemplate>
Phone Type
</HeaderTemplate>
<ItemTemplate>
<asp:DropDownList ID="DDLSpecialty" runat="server" Height="24px" Width="500px">
</asp:DropDownList>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField>
<ItemTemplate>
<asp:Label ID="LabelC1" runat="server" Text="Label" Visible="False"></asp:Label>
<asp:TextBox ID="TextBox_Phone" runat="server"></asp:TextBox> </ItemTemplate>
</asp:TemplateField>
<asp:TemplateField>
<FooterTemplate>
<asp:ImageButton ID="ImageButtonAddSpec" runat="server" ImageUrl="~/ImageWebForm/add.png" Width="18px" OnClick="ImageButtonAddSpec_Click" />
</FooterTemplate>
<ItemTemplate>
<asp:ImageButton ID="ImageButtonDel0" runat="server" ImageUrl="~/ImageWebForm/Delete.png" Width="18px" CommandName="Del" CommandArgument="<%# Container.DataItemIndex %>" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
<FooterStyle BackColor="White" ForeColor="#000066" />
<HeaderStyle BackColor="#006699" Font-Bold="True" ForeColor="White" />
<PagerStyle BackColor="White" ForeColor="#000066" HorizontalAlign="Left" />
<RowStyle ForeColor="#000066" />
<SelectedRowStyle BackColor="#669999" Font-Bold="True" ForeColor="White" />
<SortedAscendingCellStyle BackColor="#F1F1F1" />
<SortedAscendingHeaderStyle BackColor="#007DBB" />
<SortedDescendingCellStyle BackColor="#CAC9C9" />
<SortedDescendingHeaderStyle BackColor="#00547E" />
</asp:GridView>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="GridViewCertificateType" EventName="RowCommand" />
</Triggers>
</asp:UpdatePanel>
</td>
</tr>
</table>
Now I want to set data to my dropdown list and text box in Gridview from my list of Dot "phonenum",e.g "PhoneTypeId" set to dropdownlist and phoneNumber set to text box

Answer 1

You can direct bind List to your GridView and then either in the OnRowDataBound event or direct in the template you can do something like this.
First in the template.
<asp:TemplateField>
<HeaderTemplate>
Phone Type
</HeaderTemplate>
<ItemTemplate>
<asp:DropDownList ID="DDLSpecialty" Selectedvalue='<%#((PhoneNumberDto)Container.DataItem).PhoneTypeId%>' runat="server" Height="24px" Width="500px">
</asp:DropDownList>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField>
<ItemTemplate>
<asp:Label ID="LabelC1" runat="server" Text="Label"
Visible="False"></asp:Label>
<asp:TextBox ID="TextBox_Phone"
Text='<%#((PhoneNumberDto)Container.DataItem).phoneNumber %>' runat="server"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
Or in the OnRowDataBound event using FindControl() method you can assign value to your control.
protected void GridView_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
PhoneNumberDto dtoPhone = (PhoneNumberDto)e.Row.DataItem;
((TextBox)(e.Row.FindControl("txtPhoneNo"))).Text = dtoPhone.PhoneNumber;
((DropDownList)(e.Row.FindControl("DDLSpecialty"))).SelectedValue = dtoPhone.PhoneTypeId;
}
}
I hope from above 2 option you might get your solution...