Issue with Kendo dropdown's optionLabel functionality malfunctioning

Check out the Kendo code snippet below for a dropdown control.

I'm currently facing an issue where I am trying to display a "Please select" option in the dropdown. This code works perfectly fine for all other dropdowns except for this specific one. The option displays as part of the dropdown list, but not when the dropdown loads initially. I have even tried closing and reopening Visual Studio, and clearing browser history, but nothing seems to fix the problem.

function getRC(rcid) {
    for (var i = 0; i < ddRCpicklist.length; i++) {
        if (ddRCpicklist[i].rcID === rcid) {
            return ddRCpicklist[i].RootCause;
        }
    }
    return 'No value matched';
}

function RootCauseDropDownEditor(container, options) {
    if (options.model.Name !== null) {
      var ddRC=  $('<input id="ddRootCause" required data-text-field="RootCause" data-value-field="rcID"  data-change="ddRootCauseSelect" data-bind="value:' + options.field + '"/>')
                        .appendTo(container)
                        .kendoDropDownList({
                            index:0,
                            autoBind: false,
                            dataSource: { data: ddRCpicklist },
                            optionLabel: "--Please Select--"
                        }).data("kendoDropDownList");
                    }
     }

function ddRootCauseSelect(e) {
    ddValRootCause = $("#ddRootCause").val();
    alert(ddValRootCause);
}

Answer №1

It is essential that the json data for optionLabel matches the format of your other data that populates the drop-down menu. To ensure compatibility, it should look like this:

optionLabel: { Category: '-- Choose Category --', catID: '' }

Answer №2

This specific behavior is related to the use of custom editors. Is there a possibility that your dropdown is within a grid? Essentially, the code you're examining is inserting a dropdown control into a container within a grid, for example using .appendTo(container), which adds the optionValue to the dropdown while also selecting the value displayed on the grid. For instance, if your dropdown options are A,B,C and -select-, and the grid displays B in the column, the dropdown will show B as well. If you're not on the grid, the selected value is passed through the option.

Try removing the following attribute to observe the outcome:

data-bind="value:' + options.field + '"

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