Get Multiple Selected checkboxes in MVC

Question

i have a ProductController which is consists of Create method.

My Model :

public class ProductEntry
{
    public Crescent.LinqModel.Product Products         


        

Answer 1

I use this extension:

public static MvcHtmlString CheckBoxListFor<TModel, TProperty>(
    this HtmlHelper<TModel> htmlHelper,
    Expression<Func<TModel, IEnumerable<TProperty>>> expression,
    IEnumerable<SelectListItem> multiSelectList,
    Object htmlAttributes = null)
{
    // Derive property name for checkbox name
    var body = expression.Body as MemberExpression;
    if (body == null)
        return null;

    String propertyName = body.Member.Name;

    // Get currently select values from the ViewData model
    IEnumerable<TProperty> list = expression.Compile().Invoke(htmlHelper.ViewData.Model);

    // Convert selected value list to a List<String> for easy manipulation
    var selectedValues = new List<String>();

    if (list != null)
        selectedValues = new List<TProperty>(list).ConvertAll(i => i.ToString());

    // Create div
    var ulTag = new TagBuilder("ul");
    ulTag.AddCssClass("checkBoxList");
    ulTag.MergeAttributes(new RouteValueDictionary(htmlAttributes), true);

    // Add checkboxes
    foreach (var item in multiSelectList)
    {
        ulTag.InnerHtml += String.Format(
            "<li><input type=\"checkbox\" name=\"{0}\" id=\"{0}_{1}\" value=\"{1}\" {2} /><label for=\"{0}_{1}\">{3}</label></li>",
            propertyName,
            item.Value,
            selectedValues.Contains(item.Value) ? "checked=\"checked\"" : "",
            item.Text);
    }

    return MvcHtmlString.Create(ulTag.ToString());
}

Answer 2

Me too was having a scenario like you and I implemented it using EditorFor by referring this link "ASP.NET MVC - Multiple checkboxes for row selection in HTML table"

For that you need create a EditorTemplate folder and need to add the view with a same name of model. View code like below

@model EditorForSample.Models.ProductViewModel


<tr>
  <td class="text-nowrap">@Html.CheckBoxFor(m => m.Selected, new {@class="chkSelect"})  </td>
<td colspan="3">
    @Model.Name
    @Html.HiddenFor(m => m.Name)
</td>
<td>
    @Model.Price
    @Html.HiddenFor(m => m.Price)
</td>

Model can be like below.

public class ProductPageViewModel
{
    public string Message { get; set; }

    public List<ProductViewModel> ProductsList { get; set; }
}

public class ProductViewModel
{
    public bool Selected{ get; set; }
    public string Name { get; set; }
    public int Price { get; set; }
}

And in parent view you can write html like below

 .......
  <div class="col-md-12">
        <table class="table table-bordered table-striped">
            <thead>
                <tr>
                    <th><input type="checkbox" id="chkSelectAll" /></th>
                    <th colspan="3">
                        Product Name
                    </th>
                    <th>
                        Cost
                    </th>

                </tr>
            </thead>
            <tbody>
                @Html.EditorFor(m => m.ProductsList)
            </tbody>
        </table>
    </div>
.........

Above link has sample project too. I know answer of this question is already accepted but just sharing this. It may help someone. Thanks :-)

Answer 3

<script>
   $("#btndownloading").click(function (e) {
                var ckebox_value = $("input[name=cmmdLabels]:checked").map(function () {
                    if ($(this).val() != 0) {
                        return $(this).val();
                    }
                }).get();
                var ckeck_box_length = ckebox_value.length;
                if (ckeck_box_length != 0) {
                    $.ajax({
                        url: '@Url.Action("dowloadingfile", "dowloading")',
                        type: "POST",
                        data: JSON.stringify({ selectionvalue_ck: ckebox_value }),
                        contentType: "application/json; charset=utf-8",
                        success: function (data) {

                        }, 
                        }
                    });
                }
                else {
                    alert("Please select at least one File");
                }
            });
</script>

 [HttpPost]
        public ActionResult dowloadingfile(string[] selectionvalue_ck)
        {
			string fileName = "";
			for (int j = 0; j < selectionvalue.Length; j++)
                {
					fileName = selectionvalue_ck[j];
				}
		}

<input class="cb-element" name="cmmdLabels" value="1.txt" type="checkbox">
<input class="cb-element" name="cmmdLabels" value="2.txt" type="checkbox">
<input class="cb-element" name="cmmdLabels" value="3.txt" type="checkbox">
<input class="cb-element" name="cmmdLabels" value="4.txt" type="checkbox">
<input class="cb-element" name="cmmdLabels" value="5.txt" type="checkbox">

<button id="btndownloading">Download file</button>

Answer 4

Try this:

@Html.HiddenFor(m => Model.pColors[i].Value);
@Html.HiddenFor(m => Model.pColors[i].Text);
@Html.CheckBoxFor(m => Model.pColors[i].Selected);

Answer 5

I normally use below approach when dealing with checkboxes check whether it helps you.

Model:

namespace GateApplication.Models
{
    public class Gate
    {
        public string PreprationRequired { get; set; }
        public List<CheckBoxes>  lstPreprationRequired{ get; set; }
        public string[] CategoryIds { get; set; }
    }

    public class CheckBoxes
    {
        public int ID { get; set; }
        public string Value { get; set; }
        public string Text { get; set; }
        public bool Checked { get; set; }
    }
}

Controller:

Load CheckBox Value:

public ActionResult Create()
   {
      List<CheckBoxes> lstchk = new List<CheckBoxes>()
            {
                new CheckBoxes {Text="coduit", Value="coduit" },
                new CheckBoxes {Text="safety", Value="safety" },
                new CheckBoxes {Text="power", Value="power" },
                new CheckBoxes {Text="access", Value="access" }
            };

          var model = new Gate
            {
               lstPreprationRequired=lstchk
            };

            return View(model);
   }

View:

@foreach (var item in Model.lstPreprationRequired)
    {
        <input type="checkbox" id="@item.Value" name="CategoryIds" value="@item.Text"/>
                  <label for="optionId">@item.Text</label>
       <br />
    }

Now your view shold have list of checkboxes. Now saving CheckBox values to the database.

    [HttpPost]
    public ActionResult Create(FormCollection collection)
    {
        try
        {

            Gate gate = new Gate();
            TryUpdateModel(gate);

            if (ModelState.IsValid)
            {
                gate.PreprationRequired = Request.Form["CategoryIds"];// here you'll get a string containing a list of checked values of the checkbox list separated by commas

                if (string.IsNullOrEmpty(gate.PreprationRequired))//this is used when no checkbox is checked
                    gate.PreprationRequired = "None,None";

                Save();//Save to database
                return RedirectToAction("Index");
            }
            else
            {
                return View();
            }

        }
        catch
        {
            return View();
        }
    }

Now you have below kind of string in your database

safety,power,access

Now fetch the selected values and display the view.

public ActionResult Edit(int id)
        {
           List<CheckBoxes> lstchk = new List<CheckBoxes>()
            {
                new CheckBoxes {Text="coduit", Value="coduit" },
                new CheckBoxes {Text="safety", Value="safety" },
                new CheckBoxes {Text="power", Value="power" },
                new CheckBoxes {Text="access", Value="access" }
             };

            var model = new Gate
            {
                lstPreprationRequired =lstchk,
                CategoryIds = "safety,power,access".Split(',')//here get your comma separated list from database and assign it to the CategoryIds string array, i have used sample text for the values
            };

            return View(model);
        }

View:

  @foreach (var item in Model.lstPreprationRequired)
        {
             <input type="checkbox" id="@item.Value" name="CategoryIds" value="@item.Text" 
             @foreach (var c in Model.CategoryIds)
             {
               if(c == item.Value)
               {
                  <text> checked="checked"</text>
               }
             }/>
             <label for="optionId">@item.Text></label>
        }

Let me know if this does not help you.