C#中GridView的排序用法

 

 

此方法摘录于：

http://topic.csdn.net/u/20071109/20/C598BB6E-4CA8-4CD0-8204-E42A315FD5D0.html

1、利用DataView来进行排序。 

使用Seesion把排序的状态值保存，再利用DataView的Sort方法进行排序，再次帮带到GridView的数据源上。

具体代码如下：

 

using  System;
using  System.Collections;
using  System.Configuration;
using  System.Data;
using  System.Web;
using  System.Web.Security;
using  System.Web.UI;
using  System.Web.UI.HtmlControls;
using  System.Web.UI.WebControls;
using  System.Web.UI.WebControls.WebParts;

namespace  Orid.BPO.ResultAnalysis.Analysis
... {
    public partial class WebForm3 : System.Web.UI.Page
    ...{
        DataTable dataTable;
        protected void Page_Load(object sender, EventArgs e)
        ...{
            dataTable = this.MakeCustomerTable();
            gridViewPublishers.DataSource = dataTable;
            gridViewPublishers.DataBind();
        }

        //记录排序方向（升序/降序）
        private string GridViewSortDirection
        ...{
            get ...{ return ViewState["SortDirection"] as string ?? "ASC"; }
            set ...{ ViewState["SortDirection"] = value; }
        }
        //记录排序字段
        private string GridViewSortExpression
        ...{
            get ...{ return ViewState["SortExpression"] as string ?? string.Empty; }
            set ...{ ViewState["SortExpression"] = value; }
        }
        //取得排序方向（原本升序点了列头后降序排列）
        private string GetSortDirection()
        ...{
            switch (GridViewSortDirection)
            ...{
                case "ASC":
                    GridViewSortDirection = "DESC";
                    break;
                case "DESC":
                    GridViewSortDirection = "ASC";
                    break;
            }
            return GridViewSortDirection;
        }
        //排序表
        protected DataView SortDataTable(DataTable dataTable)
        ...{
            if (dataTable != null)
            ...{
                DataView dataView = new DataView(dataTable);
                if (GridViewSortExpression != string.Empty)
                ...{
                    dataView.Sort = string.Format("{0} {1}", GridViewSortExpression, GetSortDirection());
                }
                return dataView;
            }
            else
            ...{
                return new DataView();
            }
        }
        //GridView的Sorting事件代理给的方法
        protected void gridViewPublishers_Sorting(object sender, GridViewSortEventArgs e)
        ...{
            GridViewSortExpression = e.SortExpression;
            int pageIndex = gridViewPublishers.PageIndex;
            gridViewPublishers.DataSource = SortDataTable(dataTable);
            gridViewPublishers.DataBind();
            gridViewPublishers.PageIndex = pageIndex;
        }

        private DataTable MakeCustomerTable()
        ...{
            // Create a new DataTable.
            System.Data.DataTable table = new DataTable("ParentTable");
            // Declare variables for DataColumn and DataRow objects.
            DataColumn column;
            DataRow row;

            // Create new DataColumn, set DataType, 
            // ColumnName and add to DataTable.    
            column = new DataColumn();
            column.DataType = System.Type.GetType("System.Int32");
            column.ColumnName = "ID";
            column.ReadOnly = true;
            column.Unique = true;
            // Add the Column to the DataColumnCollection.
            table.Columns.Add(column);

            // Create second column.
            column = new DataColumn();
            column.DataType = System.Type.GetType("System.String");
            column.ColumnName = "Name";
            column.AutoIncrement = false;
            column.ReadOnly = false;
            column.Unique = false;
            // Add the column to the table.
            table.Columns.Add(column);

            // Make the ID column the primary key column.
            //DataColumn[] PrimaryKeyColumns = new DataColumn[1];
            //PrimaryKeyColumns[0] = table.Columns["CustomerId"];
            //table.PrimaryKey = PrimaryKeyColumns;
            
            //Create three new DataRow objects and add 
            //them to the DataTable
            for (int i = 0; i <= 2; i++)
            ...{
                row = table.NewRow();
                row["ID"] = i;
                row["Name"] = "CustomerName " + i;
                table.Rows.Add(row);
            }
            //table.Rows.Add(table.NewRow()); 
            return table;
        }

    }
}

 

在Html的定义GridView标签如下：

 

<% ... @ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm3.aspx.cs" Inherits="Orid.BPO.ResultAnalysis.Analysis.WebForm3"  %>

<! DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" >
< html  xmlns ="http://www.w3.org/1999/xhtml" >
< head  runat ="server" >
     < title > 无标题页 </ title >
</ head >
< body >
     < form  id ="form1"  runat ="server" >
     < div >
     </ div >
     < asp:GridView  ID ="gridViewPublishers"  AllowSorting ="true"  OnSorting ="gridViewPublishers_Sorting"
        runat ="server" >
         < Columns >
             < asp:BoundField  DataField ="ID"  HeaderText ="ID"  SortExpression ="ID"   />
             < asp:BoundField  DataField ="Name"  HeaderText ="Name"  SortExpression ="Name"   />
         </ Columns >
     </ asp:GridView >
     </ form >
</ body >
</ html >

 

上面就可以实现GridView的排序功能。可能各位都已经了解和用过此方法了，小弟献丑了，见笑见笑！

（但还是希望blog中收集的资料能对初学者有帮助）

希望那位能提供GridView本身内置的排序方法。。。期待。。。