kendo下拉列表cascadefrom

时间:2014-09-18 15:34:04

标签: asp.net-mvc kendo-ui kendo-asp.net-mvc cascade kendo-dropdown

我有三个剑道下拉列表,如下所示

1)

@(Html.Kendo().DropDownListFor(m => m.ProgrammeID)
.HtmlAttributes(new { data_value_primitive = "true" })
.Name("ProgrammeID") 
.DataTextField("DegreeName") 
.DataValueField("Id") 
.OptionLabel("Select Below...")
        .DataSource(source =>
        {
            source.Read(read =>
            {
                read.Action("GetProgramme", "AptitudeTset").Data("filterProgramme");
            })

            .ServerFiltering(true); 
        })
.SelectedIndex(0)
.CascadeFrom("FacultyID")
)

2)

@(Html.Kendo().DropDownListFor(m => m.SpecializationID)
    .HtmlAttributes(new { data_value_primitive = "true" })
.Name("SpecializationID") 
.DataTextField("SpecializationNameID") 
.DataValueField("SpecializationID") 
.OptionLabel("Select Below...")
        .DataSource(source =>
        {
            source.Read(read =>
            {
                read.Action("GetSpecialization", "Subject").Data("filterSpecialization"); 
            })

            .ServerFiltering(true);
        })
.SelectedIndex(0) 
.CascadeFrom("ProgrammeID")
)

3)

 @(Html.Kendo().DropDownListFor(m => m.SemesterID)

.HtmlAttributes(new { data_value_primitive = "true" })
.OptionLabel("Select Below...")
.Name("SemesterID") 
.DataTextField("SemesterName") 
.DataValueField("SemesterID")
        .DataSource(source =>
        {
            source.Read(read =>
            {
                read.Action("GetSemester", "StudentRSRegistration").Data("loadSemester");
            })  

            .ServerFiltering(true); 
        })
.SelectedIndex(0) 
.CascadeFrom("SpecializationID")    
.CascadeFrom("ProgrammeID"`enter code here`)        
)

在这里我的第3次DDL负载基于1st&第二个DDL。但有时候第二次DDL可能没有价值。它可以是空的.1d DDL总是有值。我的问题是,当第二个DDL为空值时,我的第三个DDL没有加载。但我想总是加载我的第三个DDL。因为SemesterID是需要的。 SemesterID取决于programmeID 或/和 SpecializationID。这就是为什么有些时候第二个DDl可能有空值。

1 个答案:

答案 0 :(得分:1)

我使用Ajax调用解决了这个问题。我使用了第二个DDL级联事件Handel,如下所示 的 .Events(M => m.Cascade(" cascadesp&#34))

现在是我的第二个DDL

@(Html.Kendo().DropDownListFor(m => m.SpecializationID)

    .HtmlAttributes(new { data_value_primitive = "true" })
    .Name("SpecializationID") 
    .DataTextField("SpecializationNameID") 
    .DataValueField("SpecializationID")
    .OptionLabel("Select Below...")
            .DataSource(source =>
            {

                source.Read(read =>
                {
                    read.Action("GetSpecialization", "Subject").Data("filterSpecialization"); 
                })

                .ServerFiltering(true); 
            })
    .Events(m=>m.Cascade("cascadesp"))
    .SelectedIndex(0)
    .CascadeFrom("ProgrammeID")
)

我的ajax电话是

function cascadesp()
{
    getSemesterID($("#ProgrammeID").data("kendoDropDownList").value(),$("#SpecializationID").data("kendoDropDownList").value(),$("#SpecializationLevelID").data("kendoDropDownList").value(),$("#IntakeID").data("kendoDropDownList").value(),$("#intakeYear").val());
}

function getSemesterID(ProgrammeID, SpecializationID, SpecializationLevelID, IntakeID, intakeYear)
{
    var ddl = $('#SemesterID').data("kendoDropDownList");
    var URL = "/StudentRSRegistration/GetSemester/";
    $.ajax({
        url: URL,
        data: JSON.stringify({ ProgrammeID: ProgrammeID, SpecializationID: SpecializationID, SpecializationLevelID: SpecializationLevelID, IntakeID: IntakeID, intakeYear: intakeYear }),
        async: false,
        cache: false,
        type: "POST",
        contentType: "application/json; charset=utf-8",
        dataType: "json",
        success: function (data) {
            ddl.setDataSource(data);
        }
    });
}

现在我的SemeterID DDL正在loding