How to save valid and invalid email id using Stored Procedure.

Hi
I have post the sample for save valid and invalid email id using Stored Procedure.

DbConnection

 SqlConnection sqlcon = new SqlConnection(ConfigurationManager.ConnectionStrings["DbConnect"].ConnectionString);

Client Side Code

  <asp:UpdatePanel ID="UpdatePanel1" runat="server" >
    <ContentTemplate>
    <table>
    <tr>
    <td>
        Name</td>
        <td>
            <asp:TextBox ID="TxtName" runat="server"></asp:TextBox>
        </td>
    <td>
        &nbsp;</td>
    </tr>
        <tr>
            <td>
                EmailId</td>
            <td>
                <asp:TextBox ID="TxtEmailId" runat="server"></asp:TextBox>
            </td>
            <td>
                <asp:Button ID="BtEmailId" runat="server" onclick="BtEmailId_Click" 
                    Text="Check" />
            </td>
        </tr>
    </table>

    </ContentTemplate>
    </asp:UpdatePanel>

Server Side c#

  protected void BtEmailId_Click(object sender, EventArgs e)
    {
        DataTable dt = new DataTable();
        sqlcon.Open();
        dt = FetData();
        SqlCommand cmd = new SqlCommand();
        if (Convert.ToInt32(dt.DefaultView[0][0])== 0)
        {
            cmd = new SqlCommand("sp_validEmailIdInsert", sqlcon);
            cmd.Parameters.Add(new SqlParameter("@Name", TxtName.Text));
            cmd.Parameters.Add(new SqlParameter("@Emaild", TxtEmailId.Text));
            cmd.CommandType = CommandType.StoredProcedure;
            cmd.ExecuteNonQuery();
            ScriptManager.RegisterStartupScript(this, GetType(), "alert", "alert('Save Sucessfully.');", true); 
        }
        else { ScriptManager.RegisterStartupScript(this, GetType(), "alert", "alert('Invalid Email Id.');", true);  }
    }



    public DataTable FetData()
    {

        DataTable dtt = new DataTable();
        SqlCommand cmd = new SqlCommand();
        SqlDataAdapter da = new SqlDataAdapter();
        DataTable dt = new DataTable();
        try
        {
            cmd = new SqlCommand("sp_validEmailId", sqlcon);
            cmd.Parameters.Add(new SqlParameter("@Emaild", TxtEmailId.Text));
            cmd.CommandType = CommandType.StoredProcedure;
            da.SelectCommand = cmd;
            da.Fill(dt);
        }
        catch (Exception x)
        {
            ScriptManager.RegisterStartupScript(this, GetType(), "alert", "alert('Invalid Email Id.');", true);
        }
        return dt;
    }

Sql Server Procedure - for Select Record

Create Proc sp_validEmailId
@Emaild varchar(50)
as
Select COUNT(*) from dbo.Tbl_EmailId where EmailID=@Emaild

Sql Server Procedure - for Insert Record

Create Proc sp_validEmailIdInsert
@Name varchar(50),
@Emaild varchar(50)
as
Insert into Tbl_EmailId(name,emailID) values(@Name,@Emaild)