How to SELECT a dropdown list item by value programmatically

Question

How to SELECT a drop down list item by value programatically in C#.NET?

Answer 1

This is a simple way to select an option from a dropdownlist based on a string val

private void SetDDLs(DropDownList d,string val)
    {
        ListItem li;
        for (int i = 0; i < d.Items.Count; i++)
        {
            li = d.Items[i];
            if (li.Value == val)
            {
                d.SelectedIndex = i;
                break;
            }
        }
    }

Answer 2

For those who come here by search (because this thread is over 3 years old):

string entry // replace with search value

if (comboBox.Items.Contains(entry))
   comboBox.SelectedIndex = comboBox.Items.IndexOf(entry);
else
   comboBox.SelectedIndex = 0;

Answer 3

Please try below:

myDropDown.SelectedIndex = 
myDropDown.Items.IndexOf(myDropDown.Items.FindByValue("myValue"))

Answer 4

If anyone else is trying this and facing problem then let me point one possible problem: If you are using Web Application then inside Page_Load if you are loading drop-down from DB and at the sametime you want to load data, then first load your drop-down lists and then load your data with selected drop-down conditions.

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        LoadDropdown(); //drop-downs generated first
        LoadData(); // other data loading and drop-down value selection logic here
    }
}

And for successfully selecting drop-down from code follow the approved answer above which is

ddl.SelectedValue = "2";.

Hope it solves the problem