当用户为DropDownList选择值时强制提交,除非该值为Custom

时间:2012-04-13 20:01:28

标签: javascript jquery asp.net-mvc-3

我希望一旦用户为DropDownList选择一个值,只要它不是'Custom'就强制提交。如果是“自定义”,我不希望提交表单。相反,我想让startingDate和endingDate显示。但是,除非选择了Custom,否则我不希望显示startingDate或endingDate。我想这必须用jQuery或JavaScript来完成。有谁能告诉我如何实现这个目标?

以下是控制器中的代码,用于将下拉菜单的开始日期,结束日期和列表传递给视图:

List<SelectListItem> rangeList = new List<SelectListItem>();
rangeList.Add(new SelectListItem { Text = "Today", Value = "Today" });
rangeList.Add(new SelectListItem { Text = "Yesterday", Value = "Yesterday" });
rangeList.Add(new SelectListItem { Text = "Past 7 Days", Value = "Past 7 Days" });
rangeList.Add(new SelectListItem { Text = "Past 30 Days", Value = "Past 30 Days" });
rangeList.Add(new SelectListItem { Text = "Last Month", Value = "Last Month" });
rangeList.Add(new SelectListItem { Text = "Custom", Value = "Custom" });

ViewBag.rangeList = rangeList;
ViewBag.startingDate = startingDate;
ViewBag.endingDate = endingDate;
ViewBag.specifiedRange = specifiedRange;

修改

我修改了我的代码以显示添加脚本的尝试。下面是我现在在视图中的代码。它没有做任何事情。

<script type="text/javascript">
    $("#range").change(function () 
    {
        if ($(this).val() == "Custom") 
        {
            $("p.down").toggle();
        }
        else 
        {
            $("form").submit();
        }
    });
</script>

@using (Html.BeginForm())
{
    <p>
        @Html.DropDownList("specifiedRange", new SelectList(
                    ViewBag.rangeList as System.Collections.IEnumerable, 
                    "Text", 
                    "Value", 
                    new { @Id = "range" }))
    </p>
    <p class = "down">
        Starting Date: @(Html.Telerik().DateTimePicker().Name("startingDate")) 
        Ending Date: @(Html.Telerik().DateTimePicker().Name("endingDate"))
        <input type="submit" value="GO" />
    </p>
}

2 个答案:

答案 0 :(得分:1)

是的,需要使用jquery完成。像这样:

$(document).ready(function(){
    $("#idofyourdropdown").change(function(){
       if($(this).val() == "Custom")
       {
        $("p.down").toggle();
       }
        else{
       $("form").submit();
    }

    });
});

将“向下”分类到您想要展示的<p>

答案 1 :(得分:0)

这是你在找什么?

$('#specifiedRange').change(function() {
    if($(this).val() !== 'Custom') $(this).closest('form').submit();
})