asp.net - 如何将下拉列表的值从 .aspx 传递到 .asmx.cs？

Question

我的 p1.aspx 上有这个下拉列表：

<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>

我需要在 p2.asmx.cs 上获得它的价值：

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 + "\")";
                            }

Answer 1

只需添加runat="server"到您的选择元素：

<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>

要获得所选值，您可以使用：

this.ListBoxViewType.SelectedIndex

---

此外，您应该考虑改用DropDownList控件：

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

并访问所选项目：

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