[转]ASP.NET MVC HtmlHelper扩展之Calendar日期时间选择
时间:2014-05-16 19:56:37
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本文转自:http://blog.bossma.cn/asp_net_mvc/asp-net-mvc-htmlhelper-calendar-datetime-select/
这里我们扩展HtmlHelper,就像它包含在ASP.NET MVC中一样,扩展方法使我们能为已有的类添加方法。这里使用了一个日期时间选择控件:My97DatePicker,需要添加到网站中,并在页面中引用。
先看看是怎么扩展的:
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using
System; using
System.Collections.Generic; using
System.Runtime.CompilerServices; using
System.Linq.Expressions; namespace
System.Web.Mvc { /// <summary> /// Extended the HtmlHelper for Calendar /// </summary> public
static class CalendarExtensions { private
static string defaultFormat = "yyyy-MM-dd" ; /// <summary> /// 使用特定的名称生成控件 /// </summary> /// <param name="helper">HtmlHelper对象</param> /// <param name="name">控件名称</param> /// <returns>Html文本</returns> public
static string Calendar( this
HtmlHelper helper, string
name) { return
Calendar(helper, name, defaultFormat); } /// <summary> /// 使用特定的名称生成控件 /// </summary> /// <param name="helper">HtmlHelper对象</param> /// <param name="name">控件名称</param> /// <param name="format">显示格式</param> /// <returns>Html文本</returns> public
static string Calendar( this
HtmlHelper helper, string
name, string
format) { return
GenerateHtml(name, null , format); } /// <summary> /// 使用特定的名称和初始值生成控件 /// </summary> /// <param name="helper">HtmlHelper对象</param> /// <param name="name">控件名称</param> /// <param name="date">要显示的日期时间</param> /// <returns>Html文本</returns> public
static string Calendar( this
HtmlHelper helper, string
name, DateTime date) { return
Calendar(helper, name, date, defaultFormat); } /// <summary> /// 使用特定的名称和初始值生成控件 /// </summary> /// <param name="helper">HtmlHelper对象</param> /// <param name="name">控件名称</param> /// <param name="date">要显示的日期时间</param> /// <param name="format">显示格式</param> /// <returns>Html文本</returns> public
static string Calendar( this
HtmlHelper helper, string
name, DateTime date, string
format) { return
GenerateHtml(name, date, format); } /// <summary> /// 通过lambda表达式生成控件 /// </summary> /// <param name="helper">HtmlHelper对象</param> /// <param name="expression">lambda表达式,指定要显示的属性及其所属对象</param> /// <returns>Html文本</returns> public
static string CalendarFor<TModel, TProperty>( this
HtmlHelper<TModel> helper, Expression<Func<TModel, TProperty>> expression) { return
CalendarFor(helper, expression, defaultFormat); } /// <summary> /// 通过lambda表达式生成控件 /// </summary> /// <param name="helper">HtmlHelper对象</param> /// <param name="expression">lambda表达式,指定要显示的属性及其所属对象</param> /// <param name="format">显示格式</param> /// <returns>Html文本</returns> public
static string CalendarFor<TModel, TProperty>( this
HtmlHelper<TModel> helper, Expression<Func<TModel, TProperty>> expression, string
format) { string
name = ExpressionHelper.GetExpressionText(expression); DateTime value; object
data = ModelMetadata.FromLambdaExpression<TModel, TProperty>(expression, helper.ViewData).Model; if
(data != null
&& DateTime.TryParse(data.ToString(), out
value)) { return
GenerateHtml(name, value, format); } else { return
GenerateHtml(name, null , format); } } /// <summary> /// 通过lambda表达式获取要显示的日期时间 /// </summary> /// <param name="helper">HtmlHelper对象</param> /// <param name="expression">lambda表达式,指定要显示的属性及其所属对象</param> /// <param name="format">显示格式</param> /// <returns>Html文本</returns> public
static string CalendarDisplayFor<TModel, TProperty>( this
HtmlHelper<TModel> helper, Expression<Func<TModel, TProperty>> expression, string
format) { string
name = ExpressionHelper.GetExpressionText(expression); DateTime value; object
data = ModelMetadata.FromLambdaExpression<TModel, TProperty>(expression, helper.ViewData).Model; if
(data != null
&& DateTime.TryParse(data.ToString(), out
value)) { return
value.ToString(format); } else { return
string .Empty; } } /// <summary> /// 通过lambda表达式获取要显示的日期时间 /// </summary> /// <param name="helper">HtmlHelper对象</param> /// <param name="expression">lambda表达式,指定要显示的属性及其所属对象</param> /// <returns>Html文本</returns> public
static string CalendarDisplayFor<TModel, TProperty>( this
HtmlHelper<TModel> helper, Expression<Func<TModel, TProperty>> expression) { return
CalendarDisplayFor(helper, expression, defaultFormat); } /// <summary> /// 生成输入框的Html /// </summary> /// <param name="name">calendar的名称</param> /// <param name="date">calendar的值</param> /// <returns>html文本</returns> private
static string GenerateHtml( string
name, DateTime? date, string
format) { if
(date != null ) { return
"<input type=\"text\" id=\"" + name + "\" name=\""
+ name + "\" onfocus=\"WdatePicker({dateFmt:‘"
+ format + "‘})\" class=\"Wdate\" value=\""
+ date.Value.ToString(format) + "\" />" ; } else { return
"<input type=\"text\" id=\"" + name + "\" name=\""
+ name + "\" onfocus=\"WdatePicker({dateFmt:‘"
+ format + "‘})\" class=\"Wdate\" value=\"\" />" ; } } } } |
使用办法:
日期选择输入框: <%= Html.CalendarFor(model => model.PlanStartTime)%>
显示日期:<%= Html.CalendarDisplayFor(model => model.PlanStartTime)%>
日期时间选择输入框:<%= Html.CalendarFor(model => model.PlanStartTime, “yyyy-MM-dd HH:mm”)%>
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