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Add Custom Fields in the General Tab in Add/Edit Dialog in ASP.NET MVC Gantt control

Generally in Gantt, Custom fields are displayed in the Custom Tab of the Add/Edit dialogs. However, they can be included in the General Tab of Add/Edit Dialog Box using actionBegin and actionComplete events. These events are used to append the custom field to the dialog box. The following code snippets demonstrate the solution.

razor
customfield.cs
@Html.EJS().Gantt("Gantt").DataSource((IEnumerable<object>)ViewBag.DataSource).Height("450px").TaskFields(ts => ts.Id("TaskId").Name(
    "TaskName").StartDate("StartDate").EndDate("EndDate").Duration("Duration").Progress("Progress").Child("SubTasks")).EditDialogFields(edf =>
    {
        edf.Type(Syncfusion.EJ2.Gantt.DialogFieldType.General).HeaderText("General").Add();
        edf.Type(Syncfusion.EJ2.Gantt.DialogFieldType.Dependency).Add();
        edf.Type(Syncfusion.EJ2.Gantt.DialogFieldType.Resources).Add();
        edf.Type(Syncfusion.EJ2.Gantt.DialogFieldType.Notes).Add();
    }).AddDialogFields(adf=> {
        adf.Type(Syncfusion.EJ2.Gantt.DialogFieldType.General).HeaderText("General Tab").Add();
        adf.Type(Syncfusion.EJ2.Gantt.DialogFieldType.Dependency).Add();
        adf.Type(Syncfusion.EJ2.Gantt.DialogFieldType.Resources).Add();
        adf.Type(Syncfusion.EJ2.Gantt.DialogFieldType.Notes).Add();
    }).Columns(col =>
                {
                    col.Field("TaskId").Width(150).Add();
                    col.Field("TaskName").HeaderText("Job Name").Width(250).Add();
                    col.Field("StartDate").Width(250).Add();
                    col.Field("EndDate").Width(250).Add();
                    col.Field("Duration").Width(250).Add();
                    col.Field("Progress").Width(250).Add();
                    col.Field("CustomField").Width(250).Add();
                }).Toolbar(new List<string>() 
  { "Add", "Cancel", "CollapseAll", "Delete", "Edit", "ExpandAll", "NextTimeSpan", "PrevTimeSpan", "Search", "Update" }).EditSettings(es=>
                    es.AllowAdding(true).AllowEditing(true).Mode(Syncfusion.EJ2.Gantt.EditMode.Dialog)).ActionBegin(
            "actionBegin").ActionComplete("actionComplete").Render()
<script>
    var divElement;
    var inputs = {
        booleanedit: ej.buttons.CheckBox,
        dropdownedit: ej.dropdowns.DropDownList,
        datepickeredit: ej.calendars.DatePicker,
        datetimepickeredit: ej.calendars.DateTimePicker,
        maskededit: ej.inputs.MaskedTextBox,
        numericedit: ej.inputs.NumericTextBox,
        stringedit: ej.inputs.TextBox
    };
    function actionBegin(args) {
        var ganttObj = document.getElementById("Gantt").ej2_instances[0];
        if (args.requestType === "beforeOpenEditDialog" || args.requestType === "beforeOpenAddDialog") {
            var column = ganttObj.columnByField["CustomField"];
            divElement = ganttObj.createElement("div", {
                className: "e-edit-form-column"
            });
            var inputElement;
            inputElement = ganttObj.createElement("input", {
                attrs: {
                    type: "text",
                    id: this.controlId + "" + column.field,
                    name: column.field,
                    title: column.field
                }
            });
            divElement.appendChild(inputElement);
            var input = {
                enabled: true,
                floatLabelType: "Auto",
                placeholder: "CustomField",
                value: args.rowData.CustomField
            };
            var inputObj = new inputs[column.editType](input);
            inputObj.appendTo(inputElement);
        }
    }
    function actionComplete(args) {
        var ganttObj = document.getElementById("Gantt").ej2_instances[0];
        if (args.requestType === "openEditDialog" || args.requestType === "openAddDialog") {
            var generalTab = document.getElementById(
                ganttObj.controlId + "GeneralTabContainer"
            );
            generalTab.appendChild(divElement);
        }
    }
</script>
public ActionResult Index()
{
    ViewBag.DataSource = ProjectNewData();
    return View();
}