Gridview行上下移动自己做的一个小例子（第一种方法）-白红宇

今天没有什么事做，就写了一个GridView行上下移动的小例子。

方法有好多种，我先写第一种。

没有什么技术含量

思路：

把要上移或下移的id 与它的临近行的id进行互换

效果：

前台页面：

1 <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="GridView2.aspx.cs" Inherits="WebApplication3.GridView2" %>  2  3   4  5   6   7       8   9  10     
     
       11     
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        13     
       
         14         
        
          15         
         
           16             
             17 
 21 
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             23 
 34 
 35 
                                  18 
              19 
              20            
                        24 
             
               25 
              
                26 
               
                 27 
                
                  28 
                  29 
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               32 
              33            
          
         
 36        
         37      
        38     
      
 39     
     
 40  41

后台代码：

1 using System;   2 using System.Collections.Generic;   3 using System.Linq;   4 using System.Web;   5 using System.Web.UI;   6 using System.Web.UI.WebControls;   7 using System.Data;   8 namespace WebApplication3   9 {
    10     public partial class GridView2 : System.Web.UI.Page  11     {
    12         #region  13         public int? index = null;  14         int? tep = null;  15         #endregion  16         protected void Page_Load(object sender, EventArgs e)  17         {
    18             if (!IsPostBack)  19             {
    20                 DataTable dt = CreateDataTable();  21                 GridView1.DataSource = dt; GridView1.DataBind();  22             }  23         }  24         public DataTable CreateDataTable()  25         {
    26             DataTable dt = new DataTable();       27             dt.Columns.Add("id", typeof(Int32));  28             dt.Columns.Add("name", typeof(String));  29             dt.Columns.Add("age", typeof(Int32));  30             for (int i = 0; i < 6; i++)  31             {
    32                 DataRow dr = dt.NewRow();  33                 dr["id"] = i;  34                 dr["name"] = "name" + i.ToString(); ;  35                 dr["age"] = 12 + i;  36                 dt.Rows.Add(dr);  37             }  38             ViewState["dataTable"] = dt;  39             return dt;  40         }  41         #region UP  42         public void btn_Up_Click(object sender, EventArgs e)  43         {
    44             try  45             {
    46                  47                 DataTable da = (DataTable)ViewState["dataTable"];  48                 for (int i = 0; i < GridView1.Rows.Count; i++)  49                 {
    50                     System.Web.UI.HtmlControls.HtmlInputCheckBox cb = (System.Web.UI.HtmlControls.HtmlInputCheckBox)GridView1.Rows[i].FindControl("cb");  51                     if (cb.Checked == true)  52                     {
    53                         index = Convert.ToInt32(cb.Value);  54                         break;  55                     }  56                 }  57                 if (index - 1 < 0)  58                 {
    59                     ScriptManager.RegisterClientScriptBlock(this.Page, this.Page.GetType(), "", "alert('TOP!');", true);  60  61                 }  62                 else if (index == null)  63                 {
    64                     ScriptManager.RegisterClientScriptBlock(this.updatePanel, this.updatePanel.GetType(), "", "alert('PLEASE CHECK ONE!');", true);  65                 }  66                 else  67                 {
    68                     DataRow[] dCurrent = da.Select(string.Format("id={0}", index));  69                     DataRow[] dUp = da.Select(string.Format("id={0}", index - 1));  70                     tep = Convert.ToInt32(dUp[0]["id"]);  71                     dUp[0]["id"] = dCurrent[0]["id"];  72                     dCurrent[0]["id"] = tep;  73                     DataView dv = ((DataTable)ViewState["dataTable"]).DefaultView;  74                     dv.Sort = "id";  75                     GridView1.DataSource = dv;  76                     GridView1.DataBind();  77                     updatePanel.Update();  78                     index = null;  79                 }  80                 ViewState["dataTable"] = da;  81             }  82             catch (Exception ex)  83             {
    84                 throw ex;  85             }  86         }  87         #endregion  88         #region DOWN  89         public void btn_Down_Click(object sender, EventArgs e)  90         {
    91             try  92             {
    93                 int? index = null;  94                 DataTable da = (DataTable)ViewState["dataTable"];  95                 for (int i = 0; i < GridView1.Rows.Count; i++)  96                 {
    97                     System.Web.UI.HtmlControls.HtmlInputCheckBox cb = (System.Web.UI.HtmlControls.HtmlInputCheckBox)GridView1.Rows[i].FindControl("cb");  98                     if (cb.Checked == true)  99                     {
   100                         index = Convert.ToInt32(cb.Value); 101                         break; 102                     } 103                 } 104                 if (index + 1 > GridView1.Rows.Count - 1) 105                 {
   106                     ScriptManager.RegisterClientScriptBlock(this.updatePanel, this.updatePanel.GetType(), "", "alert('END!');", true); 107                 } 108                 else if (index == null) 109                 {
   110                     ScriptManager.RegisterClientScriptBlock(this.updatePanel, this.updatePanel.GetType(), "", "alert('PLEASE CHECK ONE!');", true); 111                 } 112                 else 113                 {
   114                     DataRow[] dCurrent = da.Select(string.Format("id={0}", index)); 115                     DataRow[] dUp = da.Select(string.Format("id={0}", index + 1)); 116                     tep = Convert.ToInt32(dUp[0]["id"]); 117                     dUp[0]["id"] = dCurrent[0]["id"]; 118                     dCurrent[0]["id"] = tep; 119                     DataView dv = ((DataTable)ViewState["dataTable"]).DefaultView; 120                     dv.Sort = "id"; 121                     GridView1.DataSource = dv; 122                     GridView1.DataBind(); 123                     updatePanel.Update(); 124                     index = null; 125                     tep = null; 126                 } 127                 ViewState["dataTable"] = da; 128             } 129             catch (Exception ex) 130             {
   131                 throw ex; 132             } 133         } 134         #endregion 135 136         #region  GV RowBound 137         public void grid_RowBound(object sender, GridViewRowEventArgs e) 138         {
   139             try 140             {
   141                 if (e.Row.RowType == DataControlRowType.DataRow) 142                 {
   143                     if (tep != null) 144                     {
   145                         System.Web.UI.HtmlControls.HtmlInputCheckBox cb = (System.Web.UI.HtmlControls.HtmlInputCheckBox)e.Row.FindControl("cb"); 146                         if (tep == Convert.ToInt32(cb.Value)) 147                         {
   148                             cb.Checked = true; 149                         } 150                     } 151                 } 152             } 153             catch (Exception ex) 154             {
   155                 throw ex; 156             } 157         } 158         #endregion 159     } 160 }

本文转自lpxxn博客园博客，原文链接：http://www.cnblogs.com/li-peng/archive/2011/11/14/2248683.html，如需转载请自行联系原作者