用parameter添加数据

我刚学.NET不久，终于知道怎么添加数据了，分享给那些刚学.NET的人。我用（C#.NET+SQL2005）

前台代码是：

 <table id="divlist">
            <tr>
            <td>标题新闻：</td>
            <td>
                <asp:TextBox ID="AddName" runat="server"></asp:TextBox>
             </td>
             <td>
                 <asp:RequiredFieldValidator ControlToValidate="AddName" ID="RequiredFieldValidator1" runat="server" ErrorMessage="RequiredFieldValidator">*</asp:RequiredFieldValidator>
             </td>  
            </tr>
            <tr>
            <td>
            新闻内容：
            </td>
            <td>
                <asp:TextBox ID="AddBody" runat="server"></asp:TextBox>
            </td>
            <td>
                <asp:RequiredFieldValidator ControlToValidate="AddBody" ID="RequiredFieldValidator2" runat="server" ErrorMessage="RequiredFieldValidator">*</asp:RequiredFieldValidator>
            </td>
            </tr>
            <tr>
            <td>
            新闻时间：
            </td>
            <td>
                <asp:TextBox ID="AddTime" runat="server"></asp:TextBox>
                <asp:CalendarExtender ID="CalendarExtender1" runat="server" Format="yyyy-MM-dd" TargetControlID="AddTime">
                </asp:CalendarExtender>
            </td>
            <td>
              
            </td>
            </tr>
            <tr>
            <td>
                <asp:Button ID="AddButton" runat="server" Text="添加" οnclick="AddButton_Click" />
            </td>
            </tr>
            </table>

后台代码是：

 protected void AddButton_Click(object sender, EventArgs e)
    {
        String StrConn = "Data Source=MARS-5AB441B1A1;Initial Catalog=ReleaseNews;Integrated Security=True;Pooling=False";
        SqlConnection conn = new SqlConnection(StrConn);
        String StrCmd = "Insert into News" + "(NewsName,NewsBody,NewsTime)" + "Values" + "(@NewsName,@NewsBody,@NewsTime)";
        SqlCommand cmd = new SqlCommand(StrCmd,conn);//此处需要使cmd和conn关联
        cmd.Parameters.Add("NewsName", SqlDbType.VarChar);
        cmd.Parameters.Add("NewsBody", SqlDbType.VarChar);
        cmd.Parameters.Add("NewsTime", SqlDbType.DateTime);
        cmd.Parameters["NewsName"].Value = AddName.Text.Trim();
        cmd.Parameters["NewsBody"].Value = AddBody.Text.Trim();
        cmd.Parameters["NewsTime"].Value = AddTime.Text.Trim();
        try
        {
            if (conn.State == ConnectionState.Closed)
            { conn.Open(); }
            cmd.ExecuteNonQuery();
        }
        catch (SqlException ex)
        {
            Response.Write("fause");
        }
        finally
        {
            if (conn.State == ConnectionState.Open)
            { conn.Close(); }
        }
        //Response.Write("OK");
        Response.Redirect("ReleaseNews.aspx");
    }

记得要加上using System.Data.SqlClient;