public static MvcHtmlString ValueBoxForEnum <TEnum>(this HtmlHelper htmlHelper, string name, IEnumerable <TEnum> values, string optionLabel, object htmlAttributes = null)
where TEnum : struct
{
var list = values.Select(e => new SelectListItem {
Value = (e as Enum).ToString("d"), Text = e.ToString()
});
return(SelectExtensions.DropDownList(htmlHelper, name, list, optionLabel, htmlAttributes));
}
/// <summary>
/// 适用于Value和Text是一个数字值的下拉选单（Text值和value值一致）
/// </summary>
/// <typeparam name="TEnum"></typeparam>
/// <param name="htmlHelper"></param>
/// <param name="name"></param>
/// <param name="optionLabel"></param>
/// <param name="htmlAttributes"></param>
/// <returns></returns>
public static MvcHtmlString ValueBoxForEnumYearsAdd <TEnum>(this HtmlHelper htmlHelper,
string name, string optionLabel, object htmlAttributes = null)
where TEnum : struct
{
var values = Enum.GetValues(typeof(TEnum)).Cast <TEnum>();
var list = values.Select(e => new SelectListItem {
Value = e.ToString(), Text = (e as Enum).ToString("d")
});
return(SelectExtensions.DropDownList(htmlHelper, name, list, optionLabel, htmlAttributes));
}
public static MvcHtmlString ValueBoxForEnum <T, TEnum>(this HtmlHelper <T> htmlHelper,
Expression <Func <T, TEnum> > expression, TEnum?defaultValue, string optionlable, object htmlAttributes = null)
where TEnum : struct
{
var values = Enum.GetValues(typeof(TEnum)).Cast <TEnum>();
var list = values.Select(e => new SelectListItem {
Value = e.ToString(), Text = (e as Enum).ToString("d"),
Selected = defaultValue.HasValue && e.Equals(defaultValue.Value)
});
return(SelectExtensions.DropDownListFor(htmlHelper, expression, list, optionlable, htmlAttributes));
}
/// <summary>
/// 在EditorFor中的DropDownListFor採用此方法，否則不會加載model數據
/// </summary>
/// <typeparam name="TModel"></typeparam>
/// <typeparam name="TProperty"></typeparam>
/// <param name="htmlHelper"></param>
/// <param name="expression"></param>
/// <param name="selectList"></param>
/// <param name="htmlAttributes"></param>
/// <returns></returns>
public static MvcHtmlString EditorDropDownListFor <TModel, TProperty>(this HtmlHelper <TModel> htmlHelper, Expression <Func <TModel, TProperty> > expression, IEnumerable <SelectListItem> selectList, object htmlAttributes)
{
var dropDown = SelectExtensions.DropDownListFor(htmlHelper, expression, selectList, htmlAttributes);
var model = ModelMetadata.FromLambdaExpression(expression, htmlHelper.ViewData).Model;
if (model == null)
{
return(dropDown);
}
var dropDownWithSelect = dropDown.ToString().Replace("value=\"" + model.ToString() + "\"", "value=\"" + model.ToString() + "\" selected");
return(MvcHtmlString.Create(dropDownWithSelect));
}
private static string BooleanTemplateDropDownList(bool?value)
{
StringBuilder builder = new StringBuilder();
TagBuilder selectTag = new TagBuilder("select");
selectTag.AddCssClass("list-box");
selectTag.AddCssClass("tri-state");
selectTag.Attributes["disabled"] = "disabled";
builder.Append(selectTag.ToString(TagRenderMode.StartTag));
foreach (SelectListItem item in DefaultEditorTemplates.TriStateValues(value))
{
builder.Append(SelectExtensions.ListItemToOption(item));
}
builder.Append(selectTag.ToString(TagRenderMode.EndTag));
return(builder.ToString());
}
public static MvcHtmlString MyDropDownListFor <TModel, TProperty>(this HtmlHelper <TModel> htmlHelper, Expression <Func <TModel, TProperty> > expression, IEnumerable <SelectListItem> selectList, string optionLabel, IDictionary <string, object> htmlAttributes)
{
if (expression == null)
{
throw new ArgumentNullException("expression");
}
ModelMetadata metadata = ModelMetadata.FromLambdaExpression(expression, htmlHelper.ViewData);
IDictionary <string, object> validationAttributes = htmlHelper.GetUnobtrusiveValidationAttributes(ExpressionHelper.GetExpressionText(expression), metadata);
if (htmlAttributes == null)
{
htmlAttributes = validationAttributes;
}
else
{
htmlAttributes = htmlAttributes.Concat(validationAttributes).ToDictionary(k => k.Key, v => v.Value);
}
return(SelectExtensions.DropDownListFor(htmlHelper, expression, selectList, optionLabel, htmlAttributes));
}
