DataGrid动态添加模板列并合并头
测试库
1
CREATE TABLE [T_NanshouyongTest] (2
[ProvName] [nvarchar] (50) COLLATE Chinese_PRC_CI_AS NULL ,3
[AnserOne] [nvarchar] (50) COLLATE Chinese_PRC_CI_AS NULL ,4
[AnserOnePoint] [int] NULL ,5
[AnserTwo] [nvarchar] (50) COLLATE Chinese_PRC_CI_AS NULL ,6
[AnserTwoPoint] [int] NULL 7
) ON [PRIMARY]8
GO
CTemplateCol.cs
1
using System;2
using System.Web.UI;3
using System.Web.UI.WebControls;4
using System.Data;5
6
namespace Test1.ItemplateTest7
{8
public class CTemplateCol:ITemplate9
{10
private string colname;11
TextBox l;12
public CTemplateCol(string cname)13
{14
colname=cname;15
}16
17
//must implement following method18
public void InstantiateIn(Control container)19
{20
l = new TextBox();21
l.ID=colname;22
l.DataBinding +=23
new EventHandler(this.OnDataBinding);24
container.Controls.Add(l);25
}26
public void OnDataBinding(object sender, EventArgs e)27
{28
TextBox l = (TextBox) sender;29
DataGridItem container =30
(DataGridItem) l.NamingContainer;31
l.Text =32
((DataRowView)33
container.DataItem)[colname].ToString();34
}35
}36
37
}38
CTemplateColLabel.cs
1
using System;2
using System.Web.UI;3
using System.Web.UI.WebControls;4
using System.Data;5
6
namespace Test1.ItemplateTest7
{8
/**//// <summary>9
/// CTemplateColLabel 的摘要说明。10
/// </summary>11
public class CTemplateColLabel:ITemplate12
{13
private string colname;14
Label l;15
public CTemplateColLabel(string cname)16
{17
colname=cname;18
}19
20
public void InstantiateIn(Control container)21
{22
l = new Label();23
l.ID=colname;24
l.DataBinding +=25
new EventHandler(this.OnDataBinding);26
container.Controls.Add(l); 27
}28
29
public void OnDataBinding(object sender, EventArgs e)30
{31
Label l = (Label) sender;32
DataGridItem container =33
(DataGridItem) l.NamingContainer;34
l.Text =35
((DataRowView)36
container.DataItem)[colname].ToString();37
}38
}39
}40
asp.net Html
1
<%@Page language="c#" Codebehind="WebForm1.aspx.cs" AutoEventWireup="false" Inherits="Test1.WebForm1" %>2
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >3
<HTML>4
<HEAD>5
<title>WebForm1</title>6
<meta content="Microsoft Visual Studio .NET 7.1" name="GENERATOR">7
<meta content="C#" name="CODE_LANGUAGE">8
<meta content="JavaScript" name="vs_defaultClientScript">9
<meta content="http://schemas.microsoft.com/intellisense/ie5" name="vs_targetSchema">10
</HEAD>11
<body>12
<form id="Form1" method="post" runat="server">13
<asp:DataGrid id="grdMytest" runat="server" AutoGenerateColumns="False">14
<Columns>15
<asp:BoundColumn DataField="ProvName" HeaderText="投标人"></asp:BoundColumn>16
</Columns>17
</asp:DataGrid>18
<asp:Button id="Button1" runat="server" Text="Button"></asp:Button>19
</form>20
</body>21
</HTML>22
后台代码
1
using System;2
using System.Collections;3
using System.ComponentModel;4
using System.Data;5
using System.Drawing;6
using System.Web;7
using System.Web.SessionState;8
using System.Web.UI;9
using System.Web.UI.WebControls;10
using System.Web.UI.HtmlControls;11
12
using System.Data.SqlClient;13
using Test1.ItemplateTest;14
15
namespace Test116
{17
/**//// <summary>18
/// WebForm1 的摘要说明。19
/// </summary>20
public class WebForm1 : System.Web.UI.Page21
{22
protected System.Web.UI.WebControls.Button Button1;23
protected System.Web.UI.WebControls.DataGrid grdMytest;24
25
26
private void Page_Load(object sender, System.EventArgs e)27
{28
//添加应答列29
TemplateColumn tc1 = new TemplateColumn();30
tc1.ItemTemplate = new CTemplateColLabel("AnserOne");31
grdMytest.Columns.Add(tc1);32
33
//添加分数列34
TemplateColumn tc2=new TemplateColumn();35
tc2.ItemTemplate=new CTemplateCol("AnserOnePoint"); 36
grdMytest.Columns.Add(tc2);37
38
//添加应答列39
TemplateColumn tc3 = new TemplateColumn();40
tc3.ItemTemplate = new CTemplateColLabel("AnserTwo");41
grdMytest.Columns.Add(tc3);42
43
//添加分数列44
TemplateColumn tc4=new TemplateColumn();45
tc4.ItemTemplate=new CTemplateCol("AnserTwoPoint"); 46
grdMytest.Columns.Add(tc4);47
48
SqlConnection con = new SqlConnection("Persist Security Info=false;Data Source=192.168.0.9;Initial Catalog=TjgpE;User ID=sa;Password=;");49
SqlDataAdapter da = new SqlDataAdapter("select * from T_NanshouyongTest",con);50
DataTable dt = new DataTable();51
da.Fill(dt);52
grdMytest.DataSource = dt;53
grdMytest.DataBind();54
}55
56
Web 窗体设计器生成的代码#region Web 窗体设计器生成的代码57
override protected void OnInit(EventArgs e)58
{59
//60
// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。61
//62
InitializeComponent();63
base.OnInit(e);64
}65
66
/**//// <summary>67
/// 设计器支持所需的方法 - 不要使用代码编辑器修改68
/// 此方法的内容。69
/// </summary>70
private void InitializeComponent()71
{ 72
this.grdMytest.ItemCreated += new System.Web.UI.WebControls.DataGridItemEventHandler(this.grdMytest_ItemCreated);73
this.Button1.Click += new System.EventHandler(this.Button1_Click);74
this.Load += new System.EventHandler(this.Page_Load);75
76
}77
#endregion78
79
private void grdMytest_ItemCreated(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)80
{81
if(e.Item.ItemType == ListItemType.Header)82
{83
e.Item.SetRenderMethodDelegate(new RenderMethod(NewRenderMothodItem));//输出流重定向(按项目)84
}85
}86
87
private void NewRenderMothodItem(HtmlTextWriter writer,Control ctl)88
{89
//输出第一行第一列（投标人名称）90
TableCell cell0 = new TableCell();91
cell0.RowSpan = 2;92
cell0.Text = "投标人名称";93
cell0.RenderControl(writer);94
95
//输出要合并的第一行96
TableCell cell = new TableCell();97
cell.Text = "资信要求";98
cell.ColumnSpan = 4;99
cell.HorizontalAlign = HorizontalAlign.Center;100
cell.RenderControl(writer);101
102
//添加一行103
writer.RenderBeginTag(HtmlTextWriterTag.Tr);104
//添加合并的第二行第一列105
cell = null;106
cell = new TableCell();107
cell.ColumnSpan = 2;108
cell.Text = "问：质保";109
cell.HorizontalAlign = HorizontalAlign.Center;110
cell.RenderControl(writer);111
112
//添加合并的第二行第二列113
cell = null;114
cell = new TableCell();115
cell.ColumnSpan = 2;116
cell.Text = "问：售后";117
cell.HorizontalAlign = HorizontalAlign.Center;118
cell.RenderControl(writer);119
120
writer.RenderEndTag();//</tr>121
122
}123
124
private void Button1_Click(object sender, System.EventArgs e)125
{126
foreach(DataGridItem item in grdMytest.Items)127
{128
TextBox txtPoint = (TextBox)item.FindControl("AnserOnePoint");129
Response.Write(txtPoint.Text.Trim()+"<br>");130
}131
}132
}133
}
其实这种动态生成的页面，最大的难点还是在生成的算法上。明天好好想想。