Programmatically Items adding to SP list

  <table class="style1">
    <tr>
        <td colspan="2">
            &nbsp;</td>
    </tr>
    <tr>
        <td>
            <asp:Label ID="Lbl4" runat="server" Text="name1"></asp:Label>
            </td>
        <td>
            <asp:TextBox ID="Txt1" runat="server" Visible="true"></asp:TextBox>
        </td>
    </tr>
    <tr>
        <td colspan="2">
            &nbsp;</td>
    </tr>
    <tr>
        <td>
            <br />
            name2</td>
        <td>
            <br />
            <asp:TextBox ID="Txt2" runat="server" Visible="true"></asp:TextBox>
        </td>
    </tr>
    <tr>
        <td colspan="2">
            <asp:Button ID="Subbtn1" runat="server" onclick="Subbtn1_Click" Text="Submit" />
        </td>
    </tr>
</table>

protected void Subbtn1_Click(object sender, EventArgs e)
        {
            SPSite site = SPContext.Current.Site;
            SPWeb web = site.OpenWeb();
            web.AllowUnsafeUpdates = true;
            SPList list = web.Lists["mylist"];
            SPListItemCollection itemcoll = list.Items;
            SPListItem item = itemcoll.Add();
            item["employenames"] = Txt1.Text;
            item["eno"] = Txt2.Text;
           

            item.Update();

             }



Get items from list


protected void Subbtn1_Click(object sender, EventArgs e)
        {
            SPSite site = SPContext.Current.Site;
            SPWeb web = site.OpenWeb();
            web.AllowUnsafeUpdates = true;
            SPList list = web.Lists["mylist"];
            SPQuery myquery = new SPQuery();

            myquery.Query = "insert your query here";

 

           

 

            SPListItemCollection items = list.GetItems(myquery);

 

            foreach (SPListItem item in items)

            {

                

                if (item != null)

                {

                    

                }

            }

             }