Asp.net 如何将下拉列表的值从.aspx传递到.asmx.cs？

我的p1.aspx上有一个下拉列表：

<select id="ListBoxViewType" style="width:160px;font-family:Tahoma;visibility:hidden;">
                        <option value="Amendment">Amendment</option>
                        <option value="Agreement">Full Terms Amendment</option>
                        <option value="Both">Both</option>
                    </select>

修正案
完整条款修订
二者都

我需要得到p2.asmx.cs上的值：

if ( <insert something like this: ListBoxViewType.Value=="Amendment">)
                            {
                                fileName = chReadData.ContractNumber +"_Amendment" +"-" + chReadData.DisplaySupplementNumber;
                                description = "Amendment for " + chReadData.ContractNumber + "-" + chReadData.DisplaySupplementNumber + " (\"" + chReadData.ContractDescription + "\")";
                            }
                            else 
                            {
                                fileName = chReadData.ContractNumber +"_Full_Amendment" +"-" + chReadData.DisplaySupplementNumber;
                                description = "Amendment for " + chReadData.ContractNumber + "-" + chReadData.DisplaySupplementNumber + " (\"" + chReadData.ContractDescription + "\")";
                            }

if（）
{
fileName=chReadData.ContractNumber+“_-Amendment”+“-”+chReadData.DisplayAddmentNumber；
description=“对“+chReadData.ContractNumber+”—“+chReadData.DisplaySupplementNumber+”（\“”+chReadData.ContractDescription+“\”）的修改”；
}
其他的
{
fileName=chReadData.ContractNumber+“\u Full\u modification”+“-”+chReadData.DisplaySupplementNumber；
description=“对“+chReadData.ContractNumber+”—“+chReadData.DisplaySupplementNumber+”（\“”+chReadData.ContractDescription+“\”）的修改”；
}

只需将

runat=“server”

添加到所选元素：

<select id="ListBoxViewType" runat="server" style="width:160px;font-family:Tahoma;visibility:hidden;">
                    <option value="Amendment">Amendment</option>
                    <option value="Agreement">Full Terms Amendment</option>
                    <option value="Both">Both</option>
                </select>

---

另外，您应该考虑使用<代码> DROPPDROUNDUCT控件来代替：

<asp:DropDownList ID="ListBoxViewType" runat="server"....

<asp:DropDownList ID="ListBoxViewType" runat="server"....

this.ListBoxViewType.SelectedValue
this.ListBoxViewType.SelectedItem.Text
this.ListBoxViewType.SelectedItem.Value