CheckBoxList 获取与设置选中的值

/// <summary>
///CheckBoxListHelper 的摘要说明
///CheckBoxList获取与设置选中的值
/// </summary>
public class CheckBoxListHelper
{
private CheckBoxListHelper()
{
//
//TODO: 在此处添加构造函数逻辑
//
}
/// <summary>
/// 值的分割符
/// </summary>
private const string SEPARATOR=",";
/// <summary>
/// 获取CheckBoxList被选中的值
/// </summary>
/// <param name="cblist"></param>
/// <returns></returns>
public static string GetCheckBoxListCheckValue(CheckBoxList cbList)
{
if (cbList == null) return "";

System.Text.StringBuilder builder = new System.Text.StringBuilder();

foreach (ListItem item in cbList.Items)
{

if (item.Selected)
{
builder.AppendFormat("{0}{1}", item.Value,SEPARATOR);
}
}
if (builder.Length > 0)
{
builder.Remove(builder.Length - 1, 1);
}
return builder.ToString();
}
/// <summary>
/// 设置CheckBoxList选中的值
/// </summary>
/// <param name="cbList"></param>
/// <returns></returns>
public static void SetCheckBoxListCheck(CheckBoxList cbList,string values)
{
//当没有选择值时,取消所有选择项
if (string.IsNullOrEmpty(values)) values=SEPARATOR;

if (cbList == null) return;
//例如1,2,3 变为 1,2,3,
values = values + SEPARATOR;
foreach (ListItem item in cbList.Items)
{
item.Selected = false;//取消被选择
string value = item.Value;
if (values.IndexOf(value + SEPARATOR) > -1)
{
item.Selected = true;
}
}

}
}