如何向使用 HTML 幫助程序創建的下拉列表添加其他屬性？

Question

我有兩個使用 HTML 助手創建的下拉菜單，但是我不完全確定我可以在哪里向這兩個助手添加其他屬性？ 更具體地說，我想添加一個調用 javascript 函數的“onblur”屬性，如下所示：

@onblur = "validate3(1)"

我希望能夠為以下 HTML Helper 下拉菜單提供上述屬性：

@Html.DropDownList("ExpMonth", new List<SelectListItem>
                                {
                                    new SelectListItem { Text = "01", Value = "1"},
                                    new SelectListItem { Text = "02", Value = "2"},
                                    new SelectListItem { Text = "03", Value = "3"},
                                    new SelectListItem { Text = "04", Value = "4"},
                                    new SelectListItem { Text = "05", Value = "5"},
                                    new SelectListItem { Text = "06", Value = "6"},
                                    new SelectListItem { Text = "07", Value = "7"},
                                    new SelectListItem { Text = "08", Value = "8"},
                                    new SelectListItem { Text = "09", Value = "9"},
                                    new SelectListItem { Text = "10", Value = "10"},
                                    new SelectListItem { Text = "11", Value = "11"},
                                    new SelectListItem { Text = "12", Value = "12"}
                                }, "MM")

                                @Html.DropDownList("ExpYear", new List<SelectListItem>
                                {
                                    new SelectListItem { Text = "2020", Value = "1"},
                                    new SelectListItem { Text = "2021", Value = "2"},
                                    new SelectListItem { Text = "2022", Value = "3"},
                                    new SelectListItem { Text = "2023", Value = "4"},
                                    new SelectListItem { Text = "2024", Value = "5"},
                                    new SelectListItem { Text = "2025", Value = "6"},
                                    new SelectListItem { Text = "2026", Value = "7"},
                                    new SelectListItem { Text = "2027", Value = "8"},
                                    new SelectListItem { Text = "2028", Value = "9"},
                                    new SelectListItem { Text = "2029", Value = "10"},
                                    new SelectListItem { Text = "2030", Value = "11"},
                                }, "YY")

任何幫助表示贊賞。

Answer 1

嘗試

@Html.DropDownList("ExpMonth", new List<SelectListItem>{
    new SelectListItem { Text = "01", Value = "1"},
    new SelectListItem { Text = "02", Value = "2"},
    new SelectListItem { Text = "03", Value = "3"},
    new SelectListItem { Text = "04", Value = "4"},
    new SelectListItem { Text = "05", Value = "5"},
    new SelectListItem { Text = "06", Value = "6"},
    new SelectListItem { Text = "07", Value = "7"},
    new SelectListItem { Text = "08", Value = "8"},
    new SelectListItem { Text = "09", Value = "9"},
    new SelectListItem { Text = "10", Value = "10"},
    new SelectListItem { Text = "11", Value = "11"},
    new SelectListItem { Text = "12", Value = "12"}
}, "MM", new{@onblur = "validate3(1)"})