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Syncfusion Feedback

How to show selected value in DropdownList through Viewbag and how to validate it

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140938 Nov 15,2018 07:52 AM UTC Nov 15,2018 10:13 AM UTC ASP.NET MVC - EJ 2 1
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Tags: DropDownList
Rajesh
Asked On November 15, 2018 07:52 AM UTC

Here is my code of View : 

@Html.LabelFor(model => model.OperationId, "Operation Name ", new { @class = "control-label" })<b class="mandatory"> * </b><b>:</b>
@Html.EJS().DropDownList("OperationId").Placeholder("Select a Operation").FilterBarPlaceholder("Search Operation").AllowFiltering(true).DataSource((List<OperationModel>)ViewBag.OperationId).Filtering("onfiltering").Fields(new DropDownListFieldSettings { Text = "OperationName", Value = "OperationId" }).Render()        
@Html.ValidationMessageFor(model => model.OperationId, "", new { @class = "text-danger" })

Christopher Issac Sunder K [Syncfusion]
Replied On November 15, 2018 10:13 AM UTC

Hi Rajesh, 
 
Thank you for contacting Syncfusion Support. 
 
We have prepared a sample similar to your requirement by passing pre-selected value from ViewBag and added validation for DropDownList control.  
 
@model Uploader.Controllers.OperationModel 
 
@using (Html.BeginForm("Register", "Home", FormMethod.Post, null)) 
{ 
    @Html.LabelFor(model => model.OperationId, "Operation Name ", new { @class = "control-label" })<b class="mandatory"> * </b><b>:</b> 
    @Html.EJS().DropDownList("OperationId").Width("300").ShowClearButton(true).Placeholder("Select a Operation").FilterBarPlaceholder("Search Operation").AllowFiltering(true).DataSource((List<OperationModel>)ViewBag.OperationId).Fields(new DropDownListFieldSettings { Text = "OperationName", Value = "OperationId" }).Value(ViewBag.Value).Render() 
    @Html.ValidationMessageFor(model => model.OperationId, "", new { @class = "text-danger" }) 
    <br /> 
    <input type="submit" value="Save" class="btn btn-default" /> 
} 
 
 
Controller: 
public class HomeController : Controller 
    { 
        OperationModel model = new OperationModel(); 
        public ActionResult Index() 
        {             
            ViewBag.OperationId= OperationModel.GetAllRecords(); 
            ViewBag.Value = "1006"; 
            return View(); 
        } 
 
        public ActionResult Register(OperationModel model) 
        { 
            ViewBag.OperationId = OperationModel.GetAllRecords(); 
            if (ModelState.IsValid) 
            { 
               //perform required action after validation. 
            }           
            return View("Index"); 
        } 
    } 
     
    public class OperationModel 
    { 
        [Required(ErrorMessage ="Please Select an Item")] 
        public string OperationId { get; set; } 
       
        public string OperationName { get; set; } 
 
        public OperationModel() 
        { 
        } 
        public OperationModel(string OperationId, string OperationName) 
        { 
            this.OperationId = OperationId; 
            this.OperationName = OperationName; 
        } 
        public static List<OperationModel> GetAllRecords() 
        { 
            List<OperationModel> order = new List<OperationModel>(); 
                order.Add(new OperationModel("1001", "ALFKI")); 
                order.Add(new OperationModel("1002", "ANATR")); 
                order.Add(new OperationModel("1003", "ANTON")); 
                order.Add(new OperationModel("1004", "BLONP")); 
                order.Add(new OperationModel("1005", "BOLID")); 
                order.Add(new OperationModel("1006", "MARTIN")); 
                order.Add(new OperationModel("1007", "CACTU")); 
                order.Add(new OperationModel("1008", "VINCET")); 
                order.Add(new OperationModel("1009", "JOHN")); 
                order.Add(new OperationModel("1010", "MATHEW")); 
          
            return order; 
        }       
    } 
 

Please let us know if you need any further assistance. 

Thanks,
Christo


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