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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 MvcHtmlString 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 MvcHtmlString 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 MvcHtmlString 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 MvcHtmlString 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 MvcHtmlString 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 MvcHtmlString 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 MvcHtmlString CalendarDisplayFor<TModel, TProperty>(this HtmlHelper<TModel> helper, Expression<Func<TModel, TProperty>> expression, string format)
{
string name = ExpressionHelper.GetExpressionText(expression);
DateTime value;
string Htmlstr = "";
object data = ModelMetadata.FromLambdaExpression<TModel, TProperty>(expression, helper.ViewData).Model;
if (data != null && DateTime.TryParse(data.ToString(), out value))
{
Htmlstr = value.ToString(format);
}
else
{
Htmlstr = string.Empty;
}
return MvcHtmlString.Create(Htmlstr);
}
/// <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 MvcHtmlString 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 MvcHtmlString GenerateHtml(string name, DateTime? date, string format)
{
string Htmlstr = "";
if (date != null)
{
Htmlstr = "<input type=\"text\" id=\"" + name + "\" name=\"" + name + "\" onfocus=\"WdatePicker({dateFmt:'" + format + "'})\" class=\"Wdate\" value=\"" + date.Value.ToString(format) + "\" />";
}
else
{
Htmlstr = "<input type=\"text\" id=\"" + name + "\" name=\"" + name + "\" onfocus=\"WdatePicker({dateFmt:'" + format + "'})\" class=\"Wdate\" value=\"\" />";
}
return MvcHtmlString.Create(Htmlstr);
}
}
}使用方法
<td class="ms-ri">出生日期:</td>
<td style="vertical-align: middle">
@Html.CalendarFor(m => m.Birthday)
</td>
