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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=\"\" />";
}
}
}
}
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