MVC3 On Razor使用(3)：封装一个FlexiGrid控件

用户控件，封装一个FlexiGrid的控件，效果图如下：

实现部分：创建一个用户控件View为FlexGridCtl.cshtml,目录结构如下：

FlexGridCtl代码如下：

@model CommonLib.SL.IFlexGridModel
@{
    var count = 0;    
}
<script src="@Url.Content("~/Content/flexgrid/flexigrid.pack.js")" type="text/javascript"></script>
<link href="@Url.Content("~/Content/flexgrid/css/flexigrid/flexigrid.css")" rel="stylesheet"  type="text/css" />

<script type="text/javascript">

function test(){}

$(function(){
         $("#@Model.RenderElement").flexigrid
	   (
		  {
			url: '@Model.Action',
			dataType: 'json',
			colModel : [
                     @foreach (var item in Model.FlexGridAttr)
                     {
                        <text>
                        {display:'@(item.Value.DisplayName == null ? item.Key : item.Value.DisplayName)',
                         name:'@item.Key', 
                         '@(item.Value.Width <= 0 ? "50" : item.Value.Width.ToString())', 
                         sortable:@item.Value.Sortable.ToString().ToLower(), 
                         align:'@(item.Value.Align == null ? "left" : item.Value.Align)'}
                        @if (count + 1 != Model.FlexGridAttr.Count)
                         {
                           <text>,</text>
                         }
                        </text>   
                  count++;
               }
	        ],
		  buttons : [
				{name: '新?增?', bclass: 'add', onpress : test},
				{name: '删¦?除y', bclass: 'delete', onpress : test},
				{separator: true}
				],
            @{if (0 < Model.FlexGridAttr.Where(p => p.Value.IsSearch == true).Count())
              {
                  Write(" searchitems : [");

                  foreach (var item in Model.FlexGridAttr)
                  {
                      if (item.Value.IsSearch)
                      {
              <text>
				{display: '@(item.Value.DisplayName == null ? item.Key : item.Value.DisplayName)', name : '@item.Key'},

              </text>
                      }
                  }

                  Write("	],");
              }
            }
			sortname: "@Model.FlexGridAttr.Keys.First()",
			sortorder: "asc",
			usepager: true,
			title: '@Model.Title',
			useRp: true,
			rp: 15,
			showTableToggleBtn: true,
			 700,
			height: 200
			}
			);   
});
</script>

 

注：这里接收实现CommonLib.SL.IFlexGridModel的实现参数，通过循环嵌套动态生成FlexiGrid的代码部分；

该控件页面最终输出一段FlexiGrid的初始js代码并在调用页加载时执行。 

这行代码：url: '@Model.Action',指出了加载文档时去异步调用的url，通过该url返回json数据填充FlexiGrid。

再来看下调用页部分：

@using Mvc3Test.Models 
@using CommonLib.SL
@model IList<Mvc3Test.Models.Person>
@{
    View.Title = "主页";     
}
<h2>@View.Message</h2>

@section headinfo{
@Html.Partial("Controls/FlexGridCtl", 
new FlexGridModel<Person>() {
 Action = "Home/PersonData", 
RenderElement = "fgrd",
 Title = "人员信息表" })
}
<table id="fgrd" style="display:none"></table>

上述代码就是View页的代码，只需要调用@Html.Partial(“Controls/FlexGridCtl”,…)这一句则可动态输出FlexiGrid的整个js代码；

其中FlexGridModel<Person>对象则是传递我们定义的参数:

Action：FlexiGrid异步调用的Action的Url ，这个是需要我们在Controller实现的部分

RenderElement：则是FlexiGrid呈现数据的元素Id

Title：FlexiGrid表格的标题

这里我为了方便只定义了这3个参数，当然还可以定义一些其他的参数如：要添加的按钮、回传js函数等等。

后台所用到的cs代码：

类库公用部分，主要是通过反射获取显示列的属性及动态绑定数据：

namespace CommonLib.SL
{
public class CustomAttribute:Attribute
    {

}
/// <summary>
    /// 定义FleGrid的特性类，可以根据需要扩充
    /// </summary>
    public class FlexGridAttribute : CustomAttribute
    {
        public string DisplayName { get; set; }
        public int Width { get; set; }
        public bool Sortable { get; set; }
        public string Align { get; set; }
        public bool IsSearch { get; set; }
        public int No { get; set; }
    }
/// <summary>
    /// 定义FleGridModel的接口类，定义实现成员，可以根据需要扩充
    /// </summary>

    public interface IFlexGridModel
    {
         string Title { get; set; }
         string RenderElement { get; set; }
         string Action { get; set; }
         Dictionary<string, FlexGridAttribute> FlexGridAttr{get;set;}
    }
    public class FlexGridModel<T> : IFlexGridModel
    {
        public string Title { get; set; }
        public string RenderElement { get; set; }
        public string Action { get; set; }
        private Dictionary<string, FlexGridAttribute> _flexGridAttr;

        public Dictionary<string, FlexGridAttribute> FlexGridAttr
        {
            get {
                if (_flexGridAttr == null)
                {
                    _flexGridAttr = AttributeUtil.GetAttributeList(typeof(T));
                }
                return _flexGridAttr;
            }
            set { _flexGridAttr = value; }
        }

        
    }
    public class AttributeUtil
    {
 /// <summary>
    /// 根据Model类型，生成该类型的FlexGridAttribute字典表，根据定义的NO排序
    /// </summary>
        public static Dictionary<string, FlexGridAttribute> GetAttributeList(Type type)
        {
            Dictionary<string, FlexGridAttribute> dict = new Dictionary<string, FlexGridAttribute>();
            var props = type.GetProperties(BindingFlags.Public | BindingFlags.Instance);
            foreach (var item in props)
            {
                var customAttrs = (FlexGridAttribute[])item.GetCustomAttributes(typeof(FlexGridAttribute), false);
                if (0 < customAttrs.Length)
                {
                    dict.Add(item.Name, customAttrs[0]);
                }
            }
            var result = dict.OrderBy(p => p.Value.No);
            Dictionary<string, FlexGridAttribute> dictResult = new Dictionary<string, FlexGridAttribute>();
            foreach (var _item in result)
            {
                dictResult.Add(_item.Key, _item.Value);
            }
            return dictResult;
        }
/// <summary>
    /// 按照Model显示列的顺序反射生成FlexGrid的行数据
    /// </summary>

       public static List<string> GetFieldData<T>(T data)
        {
            var attributes = GetAttributeList(typeof(T));
            List<string> list = new List<string>();

            foreach (var item in attributes)
            {
                var value = typeof(T).GetProperty(item.Key).GetValue(data, null);
                list.Add(value == null ? string.Empty : value.ToString());
            }
            return list;
        }
    }
}

Model部分：

/// <summary>
    /// 定义Model类，并在需要显示的字段上加FlexGrid标记
    /// </summary>

public class Person : Entity
        {
            [FlexGrid(DisplayName="用户名",No=0)] 
            public string Login { get; set; }
            [FlexGrid(DisplayName = "名?",No=1)] 
            public string FirstName { get; set; }
            [FlexGrid(DisplayName = "姓",No=2)] 
            public string LastName { get; set; }
            [FlexGrid(DisplayName = "出生日期",No=3)] 
            public DateTime DateOfBirth { get; set; }
            public Country Country { get; set; }
            public Country Home { get; set; }
            public Hobby Hobby { get; set; }
            public Hobby Habby { get; set; }
        }

Contrler部分：

/// <summary>
    /// FlexiGrid异步调用的方法，返回JSON数据
    /// </summary>

public ActionResult PersonData()
        {
            JsonFlexiGridData data = new JsonFlexiGridData();
            data.rows = new List<FlexiGridRow>();
            int count = 0;
            foreach (var item in Db.Table<Person>())
            {
                data.rows.Add(new FlexiGridRow()
                {
                     id= count.ToString(),
                     cell =AttributeUtil.GetFieldData<Person>(item)
                });
                count++;
            }
            data.total = data.rows.Count;
            data.page = 1;
            return Json(data);
        }