RadComboBox.SelectedItem无法被赋值--它是只读的。

Question

如果我的rad combobox在标记中设置了ReadOnly="false"属性，但我仍然收到错误消息，该如何设置它的值？

protected void Page_Init(object sender, EventArgs e)
{
    string dateArg = Request.QueryString["date"];

    if (dateArg != null)
    {
        rcbWeek.SelectedItem = rcbWeek.FindItemByText(dateArg);
    }
}

- Jean-François Beaulieu

Answer 1

以下是如何操作的步骤，您可以在Rad控件文档中找到它：

http://www.telerik.com/help/aspnet-ajax/combobox-items-server-side-code.html

//Use RadComboBoxItem.Selected
RadComboBoxItem item = RadComboBox1.FindItemByText("Item 2");
item.Selected = true;

//Use RadComboBox.SelectedIndex
int index = RadComboBox1.FindItemIndexByValue("2");
RadComboBox1.SelectedIndex = index;

//You can also use the SelectedValue property.
RadComboBox1.SelectedValue = value;

- Stefan H