如何在MVC 4中通过Javascript选择ddl Id [英] How to get selected ddl Id through Javascript in MVC 4

问题描述

亲爱的所有，



我想相应地设置联系信息的值我有一个ddl，一旦我从ddl选择了特定的项目，那么我想要设置其余的全部使用javascript的联系信息领域。



我无法找到ddl的选定项目值如何使用javascript找到它我的代码如下。



即使有任何很好的方式来实现这种情况然后请告诉我。



我的ddl在这里..

Dear All,

I want to set value of contact information accordingly I have a ddl, once I select perticular item from ddl then I want set rest of all the field of contact information using javascript.

I am not able to find ddl's selected items value how I can find it using javascript my code is below.

even is there any great way to achieve this kind of scenario then plz let me know.

my ddl is here..

@Html.DropDownListFor(model => model.leadDetailModels.Id, new SelectList(Model.contactNames, "Id", "Name"), "-Select ContactName-", new {id = "ddlContactNames", @style = "width: 310px;height : 30px" })

现在这个模型=> model.leadDetailModel.Id正在设置但是我无法在intl javascript中找到这个值。



我的javascript代码就像这里...

now this model=>model.leadDetailModel.Id is being set but I am not able to find this value intl javascript.

my javascript code is like here...

@section Scripts {
    @Scripts.Render("~/bundles/jqueryval")

    <script type="text/javascript">
        $(function () {
           
            $("select#ddlContactNames").change(function () {
                $("#txtContactName").val(@Html.Raw(Json.Encode(@Model.contactNames[model.leadDetailModels.Id].Name)));
                $("#txtContactPhone").val(@Html.Raw(Json.Encode(@Model.contactNames[model.leadDetailModels.Id].Name)));
                $("#txtContactOtherPhone").val(@Html.Raw(Json.Encode(@Model.contactNames[model.leadDetailModels.Id].Name)));
                $("#txtContactEmail").val(@Html.Raw(Json.Encode(@Model.contactNames[model.leadDetailModels.Id].Name)));
                $("#txtContactArea").val(@Html.Raw(Json.Encode(@Model.contactNames[model.leadDetailModels.Id].Name)));
                $("#txtContactComments").val(@Html.Raw(Json.Encode(@Model.contactNames[model.leadDetailModels.Id].Name)));
            });
        });
</script>
}

以上mode.leadDetailModels.Id的粗体值设置为null所以我在这里得到例外...



我怎么解决这个问题..？



谢谢..

above bold value of "mode.leadDetailModels.Id" is set null so I am getting exception here...

how I can resolve this..?

thank you..

推荐答案

（function（）{

(function () {

（ select＃ddlContactNames）。change（function（）{

("select#ddlContactNames").change(function () {

（ < span class =code-string> #txtContactName）。val（@ Html.Raw（Json.Encode（@ Model.contactNames [model.leadDetailModels.Id] .Name）））;

("#txtContactName").val(@Html.Raw(Json.Encode(@Model.contactNames[model.leadDetailModels.Id].Name)));

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