How to bind drop down list with string array in ASP.NET?

Question

I am able to bind drop down list with a string array by doing so (not sure whether this is the correct way to implement):

string[] items = { "111", "222", "333" };
ddlSearch.DataSource = items;
ddlSearch.DataBind();

However, what I actually wanted is: When I click the drop down list, the first item showing in the list shall be 111 followed by 222 and 333.

How am I able to add the strings of text to show in the drop down list when I click the drop down list button?

Java has an easy way to add items to be displayed in the list, but how do we do it in C#? (I am very new to C# by the way.)

By this way. In what order the items are showing in the dropdown? — Shaharyar
– Shaharyar, Commented Jan 15, 2015 at 16:53
Are you looking to reorder your list? Or are you looking to add additional strings to the list? If you want to add items, it's probably easier to use List<string> or Dictionary<string> — wahwahwah
– wahwahwah, Commented Jan 15, 2015 at 16:54
I seen several examples of using list, is it possible to populate the drop down list with string array? The order does not matter. For example, I just want "111", "222", "333" in the drop down list. — user3437460
– user3437460, Commented Jan 15, 2015 at 16:56
The question is "how to fill up the drop down list with strings" - preferably array of strings — user3437460
– user3437460, Commented Jan 15, 2015 at 16:59

Izzy · Accepted Answer · 2015-01-15 16:57:03Z

11

It would be easier to use List<string>

Markup can be

<asp:DropDownList ID="DropDownList1" runat="server"></asp:DropDownList>

The backend code would look like

var items = new List<string> {
"111",
"222",
"333"
};
items.Sort(); 

DropDownList1.DataSource = items;
DropDownList1.DataBind();

answered Jan 15, 2015 at 16:57

Izzy

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Thierry_S · Accepted Answer · 2017-06-21 16:36:10Z

0

Source: https://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.linqdatasource.contexttypename(v=vs.110).aspx

public class MovieLibrary
{
    string[] _availableGenres = { "Comedy", "Drama", "Romance" };

    public MovieLibrary()
    {
    }

    public string[] AvailableGenres
    {
        get
        {
            return _availableGenres;
        }
    }
}


<asp:LinqDataSource 
    ContextTypeName="MovieLibrary" 
    TableName="AvailableGenres" 
    ID="LinqDataSource1" 
    runat="server">
</asp:LinqDataSource>
<asp:DropDownList 
    DataSourceID="LinqDataSource1"
    runat="server" 
    ID="DropDownList1">
</asp:DropDownList>

answered Jun 21, 2017 at 16:36

Thierry_S

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