bind list to dropdownlist, what to do with value?

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I am binding a List to a DropDownList. But I want to give other values to the value per list item.

I have following ddl and list:

List<string>

sport, volleyball, rugby

<select>
    <option selected="selected" value="0"> Alle soorten</option>
    <option value="sport">sport</option>
    <option value="volleyball">volleyball</option>
    <option value="rugby">rugby</option>
</select>

But I want following (ID in the value)

<select>
    <option selected="selected" value="0"> Alle soorten</option>
    <option value="1">sport</option>
    <option value="2">volleyball</option>
    <option value="3">rugby</option>
</select>

How do I need to create a List so I can get the above dropdownlist.

Thanks

If you are able to change the type of your source I would recommend to use a dictionary. You can do it this way:

var source = new Dictionary<int, string>();
source.Add(0, "Sports");
source.Add(1, "Football");
dropDown.DataSource = source;
dropDown.DataTextField = "Key";
dropDown.DataValueField = "Value";
dropDown.DataBind();

This would lead to this:

<select name="DdlCat2" id="DdlCat2" class="cats">
    <option selected="selected" value="Sports">0</option>
    <option value="Football">1</option>
</select>

Later you can access the ID or value like this:

dropDown.SelectedItem.Value
dropDown.SelectedItem.Text

How can I DataBind a List<> of objects to a DropDownList and set , List<Person> people = GetDataFromSomewhere(); DropDownList ddl I would do something like this after binding to the list. Value == id. Let's see how to use these properties to bind DropDownList. Binding DropDownList with List In this case, the DropDownList both 'Value' and 'Text' field are same. DropDownList ddl = new DropDownList(); List<string> countries = new List<string>(); countries.Add(" USA"); countries.Add(" India"); ddl.DataSource = countries; ddl.DataBind();

What you could do is to create the ListItems manually like this:

List<string> yourValues;
for(var i=0; i < yourValues.Count; i++)
    YourDropDown.Items.Add(new ListItem(yourValues[i], i.ToString());

Or you could create a temporary variable and bind your drop down list with a linq query, like this:

List<string yourValues;
var index = 0;
YourDropDown.DataSource = yourValues.Select(x => new { Text = x, Value = index++ });
YourDropDown.DataBind();

and combine that with the markup:

<asp:DropDownList ID="YourDropDown" DataValueField="Value" DataTextField="Text" runat="server" />

Binding DropDownList Using List Collection, Enum and DataSet in , In this case, the DropDownList both ' Value ' and ' Text ' field are same. I'm trying to get the value of the id in my dropdown list to post to an API and i'm not entirely sure how to do that.I Any help would be appreciated. I've tried using the onchange with a handleChange function but it doesn't do anything. The react files are below for the form and for posting of the form

Here is the one more way. Convert the DataSet Table to list and bind to dropdown.

var filter = from dr in ds.Tables[0].AsEnumerable()
            where (dr.Field<int>("FilterID") == 1)
            select new
            {
                FilterID = dr.Field<int>("FilterID"),
                FilterName = dr.Field<string>("FilterName")
            };

ddlSample.DataSource = filter;
ddlSample.DataTextField = "FilterName";
ddlSample.DataValueField = "FilterID";
ddlSample.DataBind();
filter = null; // null the var

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Ways to Bind Dropdown List in ASP.Net MVC, We will get the same output as we got in Method 1. 7. Displaying default values. We can use a third parameter to display the default value as in  We can bind the dropdown list using html.Dropdownlist (it is a HTML helper class). ListItems: <%= Html.DropDownList("ListItems")%>. Here we are passing "ListItems" that has been passed from the controller to the view. b. Another overloaded method of the html.DropdownList class for binding a dropdown list.

Different Ways Of Binding Razor DropdownList In ASP.NET MVC 5, We can have a DropDownList bound with some static values in View itself. Just add an Html helper for DropDownList and provide the static list  5 Answers 5. Try this: If you can't guarantee that there will always be at least one selected item, then you'll want to handle that separately by checking the return value from the list.Find() call to make sure it is not null. Also, DropDownList ddl = new DropDownList(); not needed if the webform has already declared:

Data binding in DropDownList | Syncfusion, In DropDownList, can bind either local array or OData, WebApi and other RESTful Corresponding field mapped has Boolean values to select the list items on  Select the cell that will be holding the drop-down list. From the Data menu click the ‘Data Validation’ button (see Figure 4). This will open the window shown in Figure 5. Change the ‘Allow:’ drop-down value to ‘List’ (Figure 6) Now a new field labelled ‘Source:’ has been added to the window. In the newly added field type

Comments
  • How are you filling up the list, maybe there you have the ids too, so a KeyValue pair should be what you should be looking at
  • @V4Vendetta aha, a Dictionary you mean? for each item also the value. KeyValuepair is only one item isn't it?
  • simple and clean.