一，ligerGrid是如何工作的。
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在没有开始做之前，需要先了解一下ligerGrid是如何工作的。简单来说，liger grid 就是提交准备好的数据到指定的目标请求数据，拿到数据以后，显示出来。
所以问题在于发送什么数据，拿到什么数据。先来看看ligerGrid的参数：
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url: null, pageSize: 10, sortName : null, sortOrder:null, root :'Rows', //数据源字段名 record:'Total', //数据源记录数字段名 pageParmName :'page', //页索引参数名，(提交给服务器) pagesizeParmName:'pagesize', //页记录数参数名，(提交给服务器) sortnameParmName:'sortname', //页排序列名(提交给服务器) sortorderParmName:'sortorder', //页排序方向(提交给服务器)?
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发送什么数据
page、pagesize、sortname、sortorder 这几个是默认发送到服务器的参数，可用于正确返回分页、排序后的数据。? 如果需要查询，可能需要配置一下parms，格式如 parms:[{name:'wherestr',value:'status="active"'}] ，这样后台就可以收到这个参数了
比如我在页面上这样配置：
pageSize:?30,url:?"service/BillListData.ashx?gridviewname=authors",?sortName:?'au_id'
后台收到的数据，将会是：
拿到什么数据
Rows、Total这两个是返回数据的默认字段名，Rows是数据的json格式，Total是记录的总数，需要的数据类似这样的：
?效果如下：
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二，存储过程
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CREATE PROCEDURE [dbo].[P_GridViewPager] (
@recordTotal INT OUTPUT, --输出记录总数
@viewName VARCHAR(800), --表名
@fieldName VARCHAR(800) = '*', --查询字段
@keyName VARCHAR(200) = 'Id', --索引字段
@pageSize INT = 20, --每页记录数
@pageNo INT =1, --当前页
@orderString VARCHAR(200), --排序条件
@whereString VARCHAR(800) = '1=1' --WHERE条件
)
AS
BEGIN
DECLARE @beginRow INT
DECLARE @endRow INT
DECLARE @tempLimit VARCHAR(200)
DECLARE @tempCount NVARCHAR(1000)
DECLARE @tempMain VARCHAR(1000)
SET @beginRow = (@pageNo - 1) * @pageSize + 1
SET @endRow = @pageNo * @pageSize
SET @tempLimit = 'rows BETWEEN ' + CAST(@beginRow AS VARCHAR) +' AND '+CAST(@endRow AS VARCHAR)
--输出参数为总记录数
SET @tempCount = 'SELECT @recordTotal = COUNT(*) FROM (SELECT '+@keyName+' FROM '+@viewName+' WHERE '+@whereString+') AS my_temp'
EXECUTE sp_executesql @tempCount,N'@recordTotal INT OUTPUT',@recordTotal OUTPUT
--主查询返回结果集
SET @tempMain = 'SELECT * FROM (SELECT ROW_NUMBER() OVER ('+@orderString+') AS rows ,'+@fieldName+' FROM '+@viewName+' WHERE '+@whereString+') AS main_temp WHERE '+@tempLimit
--PRINT @tempMain
EXECUTE (@tempMain)
END
GO
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三，准备一个通用的ashx页面
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<%@ WebHandler Language="C#" Class="BillListData" %>
using System;
using System.Web;
using ligerUI.Utility.Common;
using ligerUI.Utility.LigerGrid;
public class BillListData : IHttpHandler {
public void ProcessRequest (HttpContext context) {
context.Response.ContentType = "text/plain";
try
{
TryGetGridViewData();
}
catch (Exception err)
{
context.Response.Write("null");
}
context.Response.End();
}
public void TryGetGridViewData()
{
System.Web.HttpContext context = System.Web.HttpContext.Current;
GridViewPager pager = new GridViewPager();
string datajson = pager.GetDataJSON();
context.Response.Write(datajson);
}
public bool IsReusable {
get {
return false;
}
}
}
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四，实现处理方法（接收分页排序信息，并返回正确的数据）
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public DataTable GetGridView(string gridViewName, string fieldName, string gridKeyName, int pageNo, int pageSize, string orderStr, string whereStr, ref int recordTotal)
{
string sqlCommad = "P_GridViewPager";
SqlParameter[] parms = new SqlParameter[]{
new SqlParameter("viewName",SqlDbType.VarChar,50),
new SqlParameter("fieldName",SqlDbType.VarChar,50),
new SqlParameter("keyName",SqlDbType.VarChar,50),
new SqlParameter("pageNo",SqlDbType.Int),
new SqlParameter("pageSize",SqlDbType.Int),
new SqlParameter("orderString",SqlDbType.VarChar,50),
new SqlParameter("whereString",SqlDbType.VarChar,50),
new SqlParameter("recordTotal",SqlDbType.VarChar,50)
};
parms[0].Value = gridViewName;
parms[1].Value = fieldName;
parms[2].Value = gridKeyName;
parms[3].Value = pageNo;
parms[4].Value = pageSize;
parms[5].Value = orderStr;
parms[6].Value = whereStr;
parms[7].Direction = ParameterDirection.Output;
DataTable dt = SqlHelper.ExecuteDataset(DataBaseHelper.connectionstring, CommandType.StoredProcedure, sqlCommad, parms).Tables[0];
recordTotal = CommonHelper.ObjToInt(parms[7].Value);
return dt;
}
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public string GetDataJSON()
{
System.Web.HttpContext ctx = System.Web.HttpContext.Current;
int pageno = CommonHelper.ObjToInt(ctx.Request.Params["page"]);
int pagesize = CommonHelper.ObjToInt(ctx.Request.Params["pagesize"]);
string sortname = CommonHelper.ObjToStr(ctx.Request.Params["sortname"]);
string sortorder = CommonHelper.ObjToStr(ctx.Request.Params["sortorder"]);
string gridviewname = CommonHelper.ObjToStr(ctx.Request.Params["gridviewname"]);
string gridsearch = CommonHelper.ObjToStr(ctx.Request.Params["gridsearch"]);
if (string.IsNullOrEmpty(gridviewname))
throw new ArgumentNullException("Grid视图名[gridsearch]不能为空");
if (pageno == 0 || pagesize == 0)
{
if (string.IsNullOrEmpty(sortorder) && string.IsNullOrEmpty(gridsearch))
{
return GetDataJSON(gridviewname);
}
if(string.IsNullOrEmpty(sortorder))
return GetDataJSON(gridviewname, gridsearch);
if (string.IsNullOrEmpty(gridsearch))
return GetDataJSONUseSQL(string.Format("select * from {0} order by {1} {2}", gridviewname, sortname, sortorder.ToLower() == "asc" ? "asc" : "desc"));
return GetDataJSON(gridviewname, gridsearch, string.Format("order by {0} {1}", sortname, sortorder));
}
if (string.IsNullOrEmpty(gridsearch) && string.IsNullOrEmpty(sortname))
{
return GetDataJSON(gridviewname, pageno, pagesize);
}
if (string.IsNullOrEmpty(gridsearch) && !string.IsNullOrEmpty(sortname))
{
return GetDataJSON(gridviewname, pageno, pagesize, sortname, sortorder);
}
if (!string.IsNullOrEmpty(gridsearch) && string.IsNullOrEmpty(sortname))
{
return GetDataJSON(gridviewname, pageno, pagesize, gridsearch);
}
if (!string.IsNullOrEmpty(gridsearch) && !string.IsNullOrEmpty(sortname))
{
return GetDataJSON(gridviewname, pageno, pagesize, sortname, sortorder, gridsearch);
}
return @"{""Rows"":[],""Total"":""0""}";
}
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