<script type="text/javascript">
    $(function ()
    {
        $("#dg").datagrid(
            {
                toolbar:
                [
                    {
                        text: 'Add',
                        iconCls: 'icon-add',
                        handler: function ()
                        {
                            $.messager.alert("Action", "Add");

                        }
                    }, '-',
                    {
                        text: 'Edit',
                        iconCls: 'icon-edit',
                        handler: function ()
                        {
                            $.messager.alert("Action", "Edit");
                        }
                    }, '-',
                    {
                        text: 'Search',
                        iconCls: 'icon-search',
                        handler: function ()
                        {
                            $.messager.alert("Action", "Search");
                        }
                    }, '-',
                    {
                        text: 'Help',
                        iconCls: 'icon-help',
                        handler: function ()
                        {
                            $.messager.alert("Action", "Help");
                        }
                    }],

                onSelectPage: function (pageNumber, pageSize)
                {
                    $(this).pagination('loading');
                    alert('pageNumber:' + pageNumber + ',pageSize:' + pageSize);
                    $(this).pagination('loaded');
                },
                url: "/Home/QueryStudents",
                pagination: true,
                rownumbers: true,
                loadMsg: '数据加载中请稍后……',
                //fit: true,
                fitColumns: true,
                width: 900,
                height: 430,
                pageNumber: 1,
                pageSize: 12,
                pageList: [12, 18, 24, 32, 40],
                columns:
                [[{ title: "编号", field: "AutoKey", align: 'center' },
                    { title: "姓名", field: "Name", align: 'center' },
                    { title: "性别", field: "Sex", align: 'center' },
                    { title: "学校", field: "School", align: 'center' },
                    { title: "年龄", field: "Age", align: 'center' },
                    { title: "学科", field: "Major", align: 'center' },
                    { title: "邮箱", field: "Email", align: 'center' },
                    { title: "省份", field: "Province", align: 'center' },
                    { title: "市", field: "City", align: 'center'}]]
            }
        );
    });

    function show()
    {
        var province = $("#pro").val();
        var sex = $("#sex").val();
        $("#dg").datagrid({
            queryParams: {
                pro: province,
                sex: sex
            }
        });
    }
</script>
<div id="dg">
</div>
省：<input type="text" id="pro" />
性别：<input type="text" id="sex" />
<a onclick="show()" href="#" class="easyui-linkbutton">查询</a> 

  public JsonResult QueryStudents()
        {

            string pro = Request["pro"];
            string sex = Request["sex"];
            int rows = Convert.ToInt32(Request["rows"]);
            int page = Convert.ToInt32(Request["page"]);

            List<SqlParameter> parameters = new List<SqlParameter>();
            parameters.Add(new SqlParameter("@cureentPage", page));
            parameters.Add(new SqlParameter("@pageSize", rows));

            StringBuilder stringBuilder = new StringBuilder();
            stringBuilder.Append(@" WITH students AS (SELECT *,  ROW_NUMBER() OVER (order by AutoKey) as RowNumber FROM Student where 1=1 ");
            if (pro != null && pro != "")
            {
                stringBuilder.Append(" and Province=@province");
                parameters.Add(new SqlParameter("@province", pro));
            }
            if (sex != null && sex != "")
            {
                stringBuilder.Append(" and Sex=@sex");
                parameters.Add(new SqlParameter("@sex", sex));
            }
            stringBuilder.Append(" )  ");

            stringBuilder.Append(@"SELECT * FROM students
                                        WHERE RowNumber between @cureentPage*@pageSize-@pageSize+1 and @cureentPage*@pageSize");
            string sql = stringBuilder.ToString();
            List<Student> stus = SelectMethod.SelectStudent(sql, parameters);

            int total;
            using (SqlConnection conn = new SqlConnection("Data Source=.;Initial Catalog=BBS;uid=sa;pwd=sa"))
            {
                conn.Open();
                List<SqlParameter> param=new List<SqlParameter>();

                StringBuilder sb = new StringBuilder();

                sb.Append("select count(*) from Student where 1=1");
                if (pro != null && pro != "")
                {
                    sb.Append(" and Province=@province");
                    param.Add(new SqlParameter("@province", pro));
                }
                if (sex != null && sex != "")
                {
                    sb.Append(" and Sex=@sex");
                    param.Add(new SqlParameter("@sex", sex));
                }
                string selectedCountsql = sb.ToString();
                using (SqlCommand sqlcmd = new SqlCommand(selectedCountsql, conn))
                {
                    if (param!=null)
                    {
                        foreach (SqlParameter sp in param)
                        {
                            sqlcmd.Parameters.Add(sp);
                        }
                    }
                    total = Convert.ToInt32(sqlcmd.ExecuteScalar());
                }
            }

            return Json(new { total = total, rows = stus }, "text/html", Encoding.UTF8,
                JsonRequestBehavior.AllowGet);

        }