jquery ajax提交表单数据的两种实现方法

</tr>
<tr>
<td width="30%" class="tableBg1">客户名称：</td>
<td class="tableBg2">
<asp:TextBox ID="txtF_CorpName" runat="server"></asp:TextBox>
</td>
</tr>
<tr>
<td width="30%" class="tableBg1">回访主题：</td>
<td class="tableBg2">
<asp:TextBox ID="txtF_ReturnVisitTitle" runat="server"></asp:TextBox>
</td>
</tr>
<tr>
<td width="30%" class="tableBg1">联系人：</td>
<td class="tableBg2">
<asp:TextBox ID="txtF_ContractPerson" runat="server"></asp:TextBox>
</td>
</tr>
<tr>
<td width="30%" class="tableBg1">联系人职务：</td>
<td class="tableBg2">
<asp:TextBox ID="txtF_ContractPersonPosition" runat="server"></asp:TextBox>
</td>
</tr>
<tr>
<td width="30%" class="tableBg1">联系电话：</td>
<td class="tableBg2">
<asp:TextBox ID="txtF_ContractPhone" runat="server"></asp:TextBox>
</td>
</tr>
<tr>
<td width="30%" class="tableBg1">回访时间：</td>
<td class="tableBg2">
<asp:TextBox ID="txtF_ReturnVisitDate" runat="server"></asp:TextBox>
</td>
</tr>
<tr>
<td width="30%" class="tableBg1">回访内容：</td>
<td class="tableBg2">
<asp:TextBox ID="txtF_ReturnVisitContent" runat="server"></asp:TextBox>
</td>
</tr>
<tr>
<td width="30%" class="tableBg1">回访相关文档：</td>
<td class="tableBg2">
<asp:TextBox ID="txtF_ReturnVisitFile" runat="server"></asp:TextBox>
</td>
</tr>
<tr>
<td width="30%" class="tableBg1"> </td>
<td class="tableBg2">
<asp:Button ID="Submit_BT" runat="server" Text="确定" CssClass="button" />
<input type="reset" class="button" value="还原" />
</td>
</tr>
</table>
<span id="Tip"></span>
</div>
</form>
</body>

后台代码：

protected void Page_Load(object sender, EventArgs e)
{
{
if (Request.QueryString["flag"] != null && Request.QueryString["flag"].ToString() == "do")
{
Pxt.Logic.DBRec.ReturnVisit bll = new Pxt.Logic.DBRec.ReturnVisit();
if (bll.Add(model(0)) > 0)
{
Response.Write("操作成功！");
Response.End();
}
}
}
}
/**//// <summary>
/// 根据不同需要，设定模型->获取模型
/// </summary>
/// <param name="id">ID值</param>
/// <returns></returns>
private Pxt.Model.DBRec.ReturnVisit model(int id)
{
//获取表单值
string F_CorpName = Request.Form["txtF_CorpName"].ToString();
string F_ReturnVisitTitle = Request.Form["txtF_ReturnVisitTitle"].ToString();