How to programmatically set selected value of Dropdownlist aspx during loading of data:
We can select programmatically a value on dropdownlist by it’s index.
If we need to select by text then we need FindByText method as described in following line.
DropDownList1.Items.IndexOf(DropDownList1.Items.FindByText(“your default selected text”));
Complete example is described in following code, it’s very simple and easy.
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protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
LoadUserDropDownList();
}
}
private void LoadUserDropDownList()
{
DropDownList1.DataTextField = "user_name";
DropDownList1.DataValueField = "user_id";
DropDownList1.DataSource = getUserData();// get the data
DropDownList1.DataBind();
// Default selected value
DropDownList1.SelectedIndex = DropDownList1.Items.IndexOf(DropDownList1.Items.FindByText("your default selected text"));
}
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