Bind data to Dropdownlist inside gridview

 <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false" ShowFooter="true"
        DataKeyNames="Slno" OnRowDataBound="GridView1_RowDataBound" Height="202px" Width="347px">
        <Columns>
            <asp:TemplateField HeaderText="Item Name">
                <ItemTemplate>
                    <table width="100%">
                        <tr>
                            <td width="20%">
                                <asp:Label ID="lblname" runat="server" Text='<%#Eval("Slno") %>' />
                            </td>
                            <td width="20%">
                                <asp:Label ID="lblprice" runat="server" Text='<%#Eval("Price") %>' />
                            </td>
                            <td width="20%">
                                <asp:Label ID="lbltotitems" runat="server" Text='<%#Eval("TotItems") %>' />
                            </td>
                            <td width="20%">
                                <asp:Label ID="lbltprice" runat="server" Text='<%#Eval("TotPrice") %>' />
                            </td>
                            <td width="20%">
                               <asp:DropDownList ID="ddlgender" runat="server" AppendDataBoundItems="true"  
            DataTextField="Gender" DataValueField="Slno" AutoPostBack="True"
            SelectedValue='<%# DataBinder.Eval(Container.DataItem,"Gender")%>'>
        <asp:ListItem>m</asp:ListItem>
        <asp:ListItem>f</asp:ListItem>
    </asp:DropDownList>
                            </td>
                        </tr>
                    </table>
                </ItemTemplate>
                <HeaderTemplate>
                    <table width="100%">
                        <tr>
                            <td>
                                Item name
                            </td>
                            <td>
                                Price
                            </td>
                            <td>
                                Total items
                            </td>
                            <td>
                                Total price
                            </td>
                            <td>
                                Gender
                            </td>
                        </tr>
                    </table>
                </HeaderTemplate>
                <%-- <asp:TemplateField HeaderText="Item Price">
            <ItemTemplate>
           
            </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="Total Items">
            <ItemTemplate>
            
            </ItemTemplate>
            </asp:TemplateField>
             <asp:TemplateField HeaderText="Total Price">
            <ItemTemplate>
            
            </ItemTemplate>
            </asp:TemplateField>--%>
                <%--    <EditItemTemplate>
                <table>
                <tr>
                <td> <asp:Label ID="lblsno" Text="Slno" runat="server"/><asp:TextBox ID="txtsno" runat="server" Text='<%#Eval("Slno") %>' /></td>
                <td> <asp:Label ID="Label1" Text="Name" runat="server"/><asp:TextBox ID="txtname" runat="server" Text='<%#Eval("Name") %>' /></td>
                </tr>
                <tr>
                <td><asp:Label ID="Label2" Text="Item" runat="server"/><asp:TextBox ID="txtitem" runat="server" Text='<%#Eval("Item") %>' /></td>
                <td><asp:Label ID="Label3" Text="Price" runat="server"/><asp:TextBox ID="txtprice" runat="server" Text='<%#Eval("Price") %>' /></td>
                </tr>
                <tr>
                <td> <asp:Label ID="Label4" Text="Total Items" runat="server"/><asp:TextBox ID="txttotitems" runat="server" Text='<%#Eval("TotItems") %>' /></td>
                <td> <asp:Label ID="Label5" Text="Total Price" runat="server"/><asp:TextBox ID="txttotprice" runat="server" Text='<%#Eval("TotPrice") %>' /></td>
                </tr>
                <tr>
                <td> <asp:Label ID="Label6" Text="Discount" runat="server"/><asp:TextBox ID="txtdisc" runat="server" Text='<%#Eval("Discount") %>' /></td>
                <td> <asp:Label ID="Label7" Text="Grand Total" runat="server"/><asp:TextBox ID="txtgrandtotal" runat="server" Text='<%#Eval("GrandTotal") %>' /></td>
                </tr>
                </table>
                </EditItemTemplate>--%>
            </asp:TemplateField>
            <%--      <asp:TemplateField>
                    <EditItemTemplate>
                    <asp:Button ID="Updatebtn" CommandName="Update" runat="server" Width="50px" Text="Update"/>
                    <asp:Button ID="Cancelbtn" CommandName="Cancel" runat="server" Width="50px" Text="Cancel"/>
                      
                    </EditItemTemplate>
                    <ItemTemplate>
                        <asp:Button ID="Editbtn" CommandName="Edit" runat="server" Width="50px" Text="Edit"/>
                        <asp:Button ID="Delbtn" CommandName="Delete" runat="server" Width="50px" Text="Delete"/>
                      
                    </ItemTemplate>
                    <FooterTemplate>
                     <asp:Button ID="Addbtn" CommandName="AddNew" runat="server" Width="50px" Text="New"/>
                        </FooterTemplate>
                </asp:TemplateField>--%>
        </Columns>
    </asp:GridView>

code behind code
 protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            BindEmployeeDetails();
        }
    }

    private void BindEmployeeDetails()
    {
        con.Open();
        SqlCommand cmd = new SqlCommand("Select * from Catogery", con);
        SqlDataAdapter da = new SqlDataAdapter(cmd);
        DataSet ds = new DataSet();
        da.Fill(ds);
        con.Close();
        if (ds.Tables[0].Rows.Count > 0)
        {
            GridView1.DataSource = ds;
            GridView1.DataBind();

        }
        //foreach (GridViewRow row in GridView1.Rows)
        //{
        //    DropDownList ddlcity = (DropDownList)(GridView1.Rows[row.RowIndex].FindControl("ddlgender"));
        //    ddlcity.DataSource = ds;
        //    ddlcity.DataValueField = "Slno";
        //    ddlcity.DataTextField = "Gender";
        //    ddlcity.DataBind();
        //} 
    }