I have multiple dropdown list for same select list in look and want to set dropdown item selected as per loop.
How can I set specific one item of dropdown list selected in mvc dropdownlist.
Please help.
asked Mar 21, 2012 at 16:43
Briskstar Technologies
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4 Answers
The Html.DropDownList method takes multiple parameters, one of them being a List<SelectListItem>. The individual instance of the SelectListItem is where you set the Selected property:
var item = new SelectListItem() {
Selected = /* condition */,
Value = "Some Value",
Text = "Some Text"
};
Alternatively:
Create a SelectList collection that exposes the SelectedValue property:
Model.YourSelectList = new SelectList(items /* List<SelectListItem> */,
"Value",
"Text",
37 /* selected value */);
4 Comments
Briskstar Technologies
@{ ViewData["Sectors"] = new SelectList(Model.SectorList, "MainCategoryId", "CatName", "37"); } @Html.DropDownList("SectorId" + i, (IEnumerable<SelectListItem>)ViewData["Sectors"], "-- Select --", new { @class = "inputbox-small" })
Alex
And?! I hope you didn't set them all to
true. That would defeat the purpose of setting the Selected property ...Briskstar Technologies
No, my value for each dropdown will be different which is "37" so Select List will be same but selected will be different in loop. Please correct me if I am wrong in my code.
Briskstar Technologies
Yes, I am constructing it. Any other way where I can easily set selected like optional label parameter?
When building the SelectList, you can set the selected item on construction using http://msdn.microsoft.com/en-us/library/dd460123.aspx
Or you can set it on an individual SelectListItem via it's Selected property ( http://msdn.microsoft.com/en-us/library/system.web.mvc.selectlistitem.selected.aspx ) and use the single-parameter constructor of the select list, or pass it straight to the DropDownList method.
Comments
Use the HTML helper ListBoxFor.
@Html.ListBoxFor(m => m.MyPropertyId, Model.MySelectList)
To build the list of items, you can use the MultiSelectList. For example, in your controller:
public ActionResult Index()
{
// Get a collection of all product id's that should be selected.
int[] productIds = _service.GetSomeProductIds();
// Make a new select list with multiple selected items.
ViewBag.List = new MultiSelectList(
_service.Products,
"Id", // Name of the value field
"Name", // Name of the display text field
productIds ); // list of selected product ids
return View();
}
Then in your view:
@Html.ListBoxFor(m => m.ProductIds, (IEnumerable<SelectListItem>)ViewBag.List)
Comments
MVC method to bind custom list to dropdownlist and select item dynamically if you need more details ,comment below
Create Section
@{
List<SelectListItem> list = new List<SelectListItem>();
list.Add(new SelectListItem { Text = "SALE", Value = "SAL" });
list.Add(new SelectListItem { Text = "PURCHASE", Value = "PUR" });
}
<div class="form-group">
@Html.LabelFor(model => model.SaleOrPurchase, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.DropDownListFor(model => model.SaleOrPurchase, list, "-- Select Status --", new {@class= "form-control" })
@Html.ValidationMessageFor(model => model.SaleOrPurchase, "", new { @class = "text-danger" })
</div>
</div>
EDIT Section
List<SelectListItem> list = new List<SelectListItem>();
list.Add(new SelectListItem { Text = "SALE", Value = "SAL" });
list.Add(new SelectListItem { Text = "PURCHASE", Value = "PUR" });
IEnumerable<SelectListItem> myCollection = list.AsEnumerable();
ViewBag.SaleOrPurchase = new SelectList(myCollection, "Value", "Text", transactionTbl.SaleOrPurchase.ToString().Trim());
Comments
