/// <summary>
/// RadioButtonList for 資料集
/// </summary>
/// <typeparam name="T"></typeparam>
/// <typeparam name="TProperty"></typeparam>
/// <param name="helper"></param>
/// <param name="items">資料集</param>
/// <param name="dataValueField">值欄位</param>
/// <param name="dataTextField">顯示欄位</param>
/// <param name="expression"></param>
/// <param name="htmlAttributes"></param>
/// <param name="appendOptionLabel">是否增加預設選項 例:請選擇</param>
/// <param name="optionLabel">預設選項文字</param>
/// <param name="direction">顯示方向:垂直、水平</param>
/// <returns></returns>
public static MvcHtmlString RadioButtonListForList <T, TProperty>(this HtmlHelper <T> helper
, IEnumerable items, string dataValueField, string dataTextField, Expression <Func <T, TProperty> > expression
, object htmlAttributes = null, bool appendOptionLabel = false, string optionLabel = null
, RepeatDirections direction = RepeatDirections.Horizontal)
{
string name = BuildColumnNameFromModel(expression);
var optionData = from object o in items
select new KeyValuePair <string, string>(Eval(o, dataTextField), Eval(o, dataValueField));
string defaultSelectValue = helper.ViewData.Eval(name).ToString();
return(BuildRadioButtonList(helper, expression, name, defaultSelectValue, optionData, htmlAttributes, appendOptionLabel, optionLabel, direction));
}
/// <summary>
/// RadioButtonList for 列舉
/// </summary>
/// <typeparam name="T"></typeparam>
/// <typeparam name="TProperty"></typeparam>
/// <param name="helper"></param>
/// <param name="expression"></param>
/// <param name="htmlAttributes"></param>
/// <param name="appendOptionLabel">是否增加預設選項 例:請選擇</param>
/// <param name="optionLabel">預設選項文字</param>
/// <param name="direction">顯示方向:垂直、水平</param>
/// <returns></returns>
public static MvcHtmlString RadioButtonListForEnum <T, TProperty>(this HtmlHelper <T> helper
, Expression <Func <T, TProperty> > expression
, object htmlAttributes = null, bool appendOptionLabel = false, string optionLabel = null
, RepeatDirections direction = RepeatDirections.Horizontal)
{
string name = BuildColumnNameFromModel(expression);
Enum defaultSelectValue = helper.ViewData.Eval(name) as Enum;
IList <SelectListItem> selectList = EnumHelper.GetSelectList(typeof(TProperty), defaultSelectValue);
List <KeyValuePair <string, string> > optionData = new List <KeyValuePair <string, string> >();
foreach (var item in selectList)
{
optionData.Add(new KeyValuePair <string, string>(item.Text, item.Value));
}
return(BuildRadioButtonList(helper, expression, name, Convert.ToInt32(defaultSelectValue).ToString(), optionData, htmlAttributes, appendOptionLabel, optionLabel, direction));
}
private static MvcHtmlString BuildRadioButtonList <T, TProperty>(HtmlHelper <T> helper, Expression <Func <T, TProperty> > expression, string name, string defaultSelectValue, IEnumerable <KeyValuePair <string, string> > optionData
, object htmlAttributes, bool appendOptionLabel, string optionLabel, RepeatDirections direction = RepeatDirections.Horizontal)
{
StringBuilder renderHtmlTag = new StringBuilder();
IDictionary <string, string> newOptionData = new Dictionary <string, string>();
if (appendOptionLabel)
{
newOptionData.Add(new KeyValuePair <string, string>(optionLabel ?? "請選擇", ""));
}
foreach (var item in optionData)
{
newOptionData.Add(item);
}
int i = 0;
foreach (var option in newOptionData)
{
string id = string.Format("{0}_{1}", name.Replace(".", "_"), i++);
TagBuilder optionTag = new TagBuilder("input");
optionTag.Attributes.Add("type", "radio");
optionTag.Attributes.Add("name", name);
optionTag.Attributes.Add("id", id);
optionTag.Attributes.Add("value", option.Value);
if (option.Value == defaultSelectValue)
{
optionTag.Attributes.Add("checked", "checked");
}
RouteValueDictionary attribute = null;
if (htmlAttributes != null)
{
attribute = new RouteValueDictionary(htmlAttributes);
}
else
{
attribute = new RouteValueDictionary();
}
optionTag.MergeAttributes(attribute);
ModelMetadata metadata = ModelMetadata.FromLambdaExpression(expression, helper.ViewData);
var unobtrusive = helper.GetUnobtrusiveValidationAttributes(name, metadata);
optionTag.MergeAttributes(unobtrusive);
var radio = optionTag.ToString();
renderHtmlTag.AppendFormat("<div class='{2}'><label>{0}{1}</label></div>", radio, option.Key, (direction == RepeatDirections.Horizontal ? "radio-inline" : "radio"));
}
return(new MvcHtmlString(renderHtmlTag.ToString()));
}
