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  • 动态生成GridView列

      • 动态生成GridView列（每次需要绑定的列的数目不同），即动态绑定数据源时列数目不固定的绑定方式

        版权声明：转载时请以超链接形式标明文章原始出处和作者信息及本声明
        http://www.blogbus.com/flbh-logs/233317059.html

        想实现这样的功能吗？在程序运行中使GridView动态生成列，而并不是将列固定写死在GridView上

        写个绑定GrideView的方法

         1  /// <summary>
 2  /// 绑定生成GridView
 3  /// </summary>
 4  /// <param name="gdv">要绑定的GridView</param>
 5  /// <param name="dtblDataSource">GridView的数据源</param>
 6  /// <param name="strDataKey">GridView的DataKeyNames</param>
 7  public static void GridViewBind(GridView gdv, DataTable dtblDataSource, string strDataKey)
 8  {
 9  gdv.Columns.Clear();
10 
11  gdv.AutoGenerateColumns = false;
12  gdv.DataSource = dtblDataSource;
13  gdv.DataKeyNames = new string[] { strDataKey };
14 
15  for (int i = 0; i < dtblDataSource.Columns.Count; i++) //绑定普通数据列
16  {
17  BoundField bfColumn = new BoundField();
18  bfColumn.DataField = dtblDataSource.Columns[i].ColumnName;
19  bfColumn.HeaderText = dtblDataSource.Columns[i].Caption;
20  gdv.Columns.Add(bfColumn);
21  }
22 
23  gdv.Columns[1].Visible = false;
24 
25  CommandField cfModify = new CommandField(); //绑定命令列
26  cfModify.ButtonType = ButtonType.Button;
27  cfModify.SelectText = "修改";
28  cfModify.ShowSelectButton = true;
29  gdv.Columns.Add(cfModify);
30 
31  gdv.DataBind();
32  }



        只要调用这个方法就可以啦！试试吧！

        ************************************************************************************************
        转帖:http://hi.baidu.com/nirvanan/blog/item/4c9ba84a998d7ef883025c1b

        .html

        文件名：list.aspx

        前台代码：

        <%@ Page Language="C#" AutoEventWireup="true" CodeFile="List.aspx.cs" Inherits="manager_general_List" %>

<!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></title>
</head>
<body style="font-size: 12px;">
    <form id="form1" runat="server">
    <img src="../images/arrow03.gif" /><span style="font-weight: bold">
        <asp:Literal ID="ltl_listName" runat="server"></asp:Literal></span><br />
    <div style="clear: both; height: 20px;  100%;">
    </div>
    </form>
</body>
</html>

        =======================================================================

        后台代码：

        

        

          1 using System;
  2 using System.Collections.Generic;
  3 using System.Web;
  4 using System.Web.UI;
  5 using System.Web.UI.WebControls;
  6 
  7 using System.Data;
  8 using System.Data.OleDb;
  9 using System.Collections;
 10 using System.Drawing;
 11 
 12 public partial class manager_general_List : System.Web.UI.Page
 13 {
 14 
 15     GridView gvshow = null;//定义全局变量
 16     public static bool sign; 
 17 
 18     protected void Page_Load(object sender, EventArgs e)
 19     {
 20         string tbName = ""; //是要在gridview中显示的数据表名
 21         if (Request.QueryString["t"]!=null&&Request.QueryString["t"]!="")
 22         {
 23             tbName=Request.QueryString["t"].ToString();
 24         }
 25         else
 26         {
 27             common.MsgBox("没有相应的内容!");//此为自定的弹出消息框函数。使用者可自定义。或者去掉。
 28             Response.End();
 29         }
 30 
 31         if (sign != null) //根据标记符号来判断，重新绑定那个控件
 32         {
 33             if (sign ==false)
 34             {
 35 
 36                 string sql = getListSql(tbName);//获取要在gridview中显示的字段
 37                 if (sql=="")
 38                 {
 39                     common.MsgBox("没有相应的内容!");//此为自定的弹出消息框函数。使用者可自选定义。或者去掉。
 40                     Response.End();
 41                 }
 42                 try
 43                 {
 44                     setBind(sql,tbName);
 45                     //ltl_listName.Text = common.getFieldValueFromTab("tb_showname", "ctbname", tbName, 0, "cshowname")+"列表";
 46                 }
 47                 catch (System.Exception errr)
 48                 {
 49                     common.MsgBox("没有相应的内容!");//此为自定的弹出消息框函数。使用者可自选定义。或者去掉。
 50                     Response.End();
 51                 }
 52                 
 53              }
 54 
 55         }
 56 
 57     }
 58 
 59     //获取要在gridview中显示的字段的sql
 60     public string getListSql(string tbName)
 61     {
 62         string sqlStr = "";
 63         string temp = "";
 64 
 65         //以下tb_listfield 为数据库中保存gridview要列表的其他表的字段名，包含两字段，cname,cfield,
 66         //其中cname为要显示的表的表名，cfield为该表要显示的字段名。
 67         DataSet ds = common.RunQuery("select * from tb_listfield where cname='" + tbName + "' order by cindex");
 68         if (ds.Tables.Count>0)
 69         {
 70             foreach (DataRow row in ds.Tables[0].Rows)
 71             {
 72                 temp += row["cfield"].ToString()+",";
 73             }
 74         }
 75         if (temp!="")
 76         {
 77             temp = temp.Substring(0, temp.Length - 1);//去掉最后一个逗号
 78             sqlStr = "select " + temp + " from " + tbName;
 79         }
 80         return sqlStr;
 81     }
 82 
 83     public void setBind(string sql,string tbName)
 84     {
 85         
 86         DataTable dt = getDataTable(sql); //获得数据源
 87         string headerText = "";
 88 
 89         gvshow = new GridView();//new一个grideview
 90         gvshow.Width = Unit.Pixel(700);//宽度
 91         gvshow.AlternatingRowStyle.BackColor =Color.FromArgb(0xF2,0xF2,0xF2);//偶数行的颜色
 92         gvshow.HeaderStyle.BackColor = Color.FromArgb(0xF2, 0xF2, 0xF2);//表头的颜色
 93         gvshow.HeaderStyle.Font.Bold = true;
 94 
 95         gvshow.AutoGenerateColumns = false;//设置自动产生列为false
 96         gvshow.RowEditing += new GridViewEditEventHandler(gvshow_RowEditing); //添加编辑事件
 97         gvshow.RowDeleting += new GridViewDeleteEventHandler(gvshow_RowDeleting);//添加删除事件
 98         gvshow.DataSource = dt;//设置数据源
 99 
100         //遍历数据源所有的列，并绑定到gridview
101         for (int i = 0; i < dt.Columns.Count; i++)
102         {
103             BoundField bc = new BoundField();
104             bc.DataField = dt.Columns[i].ColumnName.ToString();
105             
106             headerText = dt.Columns[i].Caption.ToString();
107 
108             //替换表头文字
109             DataSet hDs=common.RunQuery("select top 1 * from tb_listfield where cname='"+tbName+"' and cfield='"+headerText+"'");
110             if (hDs.Tables.Count>0)
111             {
112                 if (hDs.Tables[0].Rows.Count>0)
113                 {
114                     headerText = hDs.Tables[0].Rows[0]["cheadertext"].ToString();
115                 }
116             }
117             bc.HeaderText = headerText;
118 
119             bc.ItemStyle.HorizontalAlign =HorizontalAlign.Center;//居中对齐
120             gvshow.Columns.Add(bc);
121         }
122 
123         //添加编辑列
124         CommandField cf = new CommandField();//命令字段
125         cf.ButtonType = ButtonType.Link;//超链接样式的按钮
126         cf.ShowEditButton = true;//显示编辑按钮
127         cf.CausesValidation = false;//引发数据验证为false
128         cf.HeaderText = "编辑";
129         cf.ItemStyle.HorizontalAlign = HorizontalAlign.Center;
130         gvshow.Columns.Add(cf);//添加编辑按钮到gridview
131 
132 
133         //添加删除列
134         CommandField cf2 = new CommandField();
135         cf2.ButtonType = ButtonType.Link;
136         cf2.ShowDeleteButton = true;//显示删除按钮
137         cf2.CausesValidation = false;
138         cf2.HeaderText = "删除";
139         cf2.ItemStyle.HorizontalAlign = HorizontalAlign.Center;
140         gvshow.Columns.Add(cf2);
141 
142         //添加包复选框的模板列
143         TemplateField tf = new TemplateField();
144         tf.ItemTemplate = new MyTemplate("", DataControlRowType.DataRow);
145         //tf.HeaderText = "选择";
146         tf.HeaderTemplate = new MyTemplate("", DataControlRowType.Header);
147         tf.ItemStyle.HorizontalAlign = HorizontalAlign.Center;
148         gvshow.Columns.Add(tf);
149 
150 
151        
152 
153         gvshow.DataBind();
154 
155         form1.Controls.Add(gvshow);
156     }
157     
158     //删除gridview的行
159     void gvshow_RowDeleting(object sender, GridViewDeleteEventArgs e)
160     {
161         int i = e.RowIndex;
162         Response.Write("delete:" + gvshow.Rows[i].Cells[0].Text.ToString());
163     }
164 
165 
166     //编辑行
167     public void gvshow_RowEditing(object sender, GridViewEditEventArgs e)
168     {
169         int i = e.NewEditIndex;
170         string id = gvshow.Rows[i].Cells[0].Text.ToString();
171 
172         Response.Write("you want to edit" + id);
173     }
174 
175 
176     //获得数据表
177     public DataTable getDataTable(string sql)
178     {
179         DataTable dt = common.RunQuery(sql).Tables[0];
180         return dt;
181     }
182 
183 }
        

        

        


         
        

        

        =======================================================================
        

        创建模板列的类文件名：MyTemplate.cs
        

        类代码：
        

        

         1 using System;
 2 using System.Collections.Generic;
 3 using System.Web;
 4 
 5 
 6 using System.Web.UI;
 7 using System.Web.UI.WebControls;
 8 
 9 /// <summary>
10 /////添加包复选框的模板列的类
11 /// </summary>
12 public class MyTemplate : ITemplate
13 {
14     private string strColumnName;
15     private DataControlRowType dcrtColumnType;
16 
17     public MyTemplate()
18     {
19         //
20         // TODO: 在此处添加构造函数逻辑
21         //
22     }
23 
24     /**//// <summary>
25     /// 动态添加模版列
26     /// </summary>
27     /// <param name="strColumnName">列名</param>
28     /// <param name="dcrtColumnType">列的类型</param>
29     public MyTemplate(string strColumnName, DataControlRowType dcrtColumnType)
30     {
31         this.strColumnName = strColumnName;
32         this.dcrtColumnType = dcrtColumnType;
33     }
34 
35     public void InstantiateIn(Control ctlContainer)
36     {
37         switch (dcrtColumnType)
38         {
39             case DataControlRowType.Header: //列标题
40 
41                 //如果头部使用标题则使用以下代码
42                 //Literal ltr = new Literal();
43                 //ltr.Text = strColumnName;
44                 //ctlContainer.Controls.Add(ltr);
45                 
46                 //头部也创建一个checkbox，则使用如下代码
47                 CheckBox cbh = new CheckBox();
48                 cbh.ID = "CheckBox1";
49                 cbh.Checked = false;
50                 ctlContainer.Controls.Add(cbh);
51                 break;
52             case DataControlRowType.DataRow: //模版列内容——加载CheckBox 
53                 CheckBox cb = new CheckBox();
54                 cb.ID = "CheckBox1";
55                 cb.Checked = false;
56                 ctlContainer.Controls.Add(cb);
57                 break;
58         }
59     }
60 
61 }
        

        


        ==================================================================
        

        common.cs类代码
        

        

         1 using System;
 2 using System.Collections.Generic;
 3 
 4 using System.Web;
 5 
 6 using System.Data;
 7 using System.Data.OleDb;
 8 using System.Collections;
 9 using System.Drawing;
10 
11 using System.Security.Cryptography;//使用md5
12 using System.Text.RegularExpressions;//正则表达式命名空间
13 
14 /// <summary>
15 ///common 的摘要说明
16 /// </summary>
17 public class common
18 {
19 
20     public common()
21 {
22    //
23    //TODO: 在此处添加构造函数逻辑
24    //
25 }
26 
27 
28     //获取数据库链接
29     public static OleDbConnection getConn()
30     {
31         string myPath=System.Web.HttpContext.Current.Server.MapPath( "~/ ");
32         myPath+="App_Data\xxxx.mdb";
33         return new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + myPath + ";Persist Security Info=True");
34     
35     }
36 
37     //运行查询
38     public static DataSet RunQuery(String QueryString)
39     {
40 
41         // 声明连接字符串。本示例使用oledb 
42         //连接到xxxx.mdb数据库
43 
44         OleDbConnection DBConnection = common.getConn();
45         OleDbDataAdapter DBAdapter;
46         DataSet ResultsDataSet = new DataSet();
47 
48         try
49         {
50 
51             //运行查询并建立一个数据集
52             DBAdapter = new OleDbDataAdapter(QueryString, DBConnection);
53             DBAdapter.Fill(ResultsDataSet);
54 
55             //关闭数据库连接
56             DBConnection.Close();
57 
58         }
59         catch (Exception ex)
60         {
61 
62             //如果数据库连接仍然打开则关闭它
63             if (DBConnection.State == ConnectionState.Open)
64             {
65                 DBConnection.Close();
66             }
67             MsgBox("无法连接到数据库!");
68             System.Web.HttpContext.Current.Response.Write("<script>history.back(1);</script>");
69 
70         }
71 
72         return ResultsDataSet;
73 
74     }
75 
76     //弹出消息框
77     public static void MsgBox(string msg)
78     {
79         System.Web.HttpContext.Current.Response.Write("<script>alert('" + msg + "')</script>");
80     }
        

        



        


        


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                原文地址：https://www.cnblogs.com/managersi/p/4072087.html
              
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