Radiobutton list select an Item on page Load

I have a radiobuttonlist that i am populating on 开发者_开发百科runtime with a datasource. Now what I want is to select the item that has text "Daily At" by default when page is loaded. How to achieve this?

foreach (ListItem item in RadioButtonList1.Items)
            {
                if (item.Text.Contains("Daily At"))
                {
                    item.Selected = true;
                    break;
                }
            }

Set SelectedValue property.

if(!IsPostBack)
{
 ....
 RadioButtonList1.DataBind();
 RadioButtonList1.SelectedValue="Daily At";
}

You can use SelectedIndex property.

if(!IsPostBack)
    {
     ....
     RadioButtonList1.DataBind();
     RadioButtonList1.SelectedIndex=1;
    }

Here is sample for your reference:

public class Data
    {
        public int No { get; set; }
        public string Name { get; set; }
    }

Code in Page_Load event

   if (!IsPostBack)
        {
            List<Data> list = new List<Data>()
            {
                 new Data() { Name="Test1", No=10},
                 new Data() { Name="Test2", No=20},
                 new Data() { Name="Test3", No=30}
            };

            RadioButtonList1.DataSource = list;
            RadioButtonList1.DataTextField = "Name";
            RadioButtonList1.DataValueField = "No";
            RadioButtonList1.DataBind();

            RadioButtonList1.SelectedValue = "30";
        }

Try this

 protected void Page_Load(object sender, EventArgs e)
 {   
    if (!Page.IsPostBack)
    {    
      RadioButtonList.DataBind();
      RadioButtonList.Items.FindByText("Daily At").Selected=true;
    }
 }