Monday 15 March 2010

How to Bind Enum Types to a dropdown list or any other bindable Control in ASP.NET?

public enum Color
{
RED,
GREEN,
BLUE
}

Every Enum type derives from System.Enum. There are two static methods that help bind data to a drop-down list control (and retrieve the value). These are Enum.GetNames and Enum.Parse. Using GetNames, you are able to bind to your drop-down list control as follows:

protected System.Web.UI.WebControls.DropDownList ddColor;

private void Page_Load(object sender, System.EventArgs e)
{
if(!IsPostBack)
{
ddColor.DataSource = Enum.GetNames(typeof(Color));
ddColor.DataBind();
}
}

Now if you want the Enum value Back on Selection ...

private void ddColor_SelectedIndexChanged(object sender, System.EventArgs e)
{
Color selectedColor = (Color)Enum.Parse(ddColor.SelectedValue);
}

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