C# 使用动态绑定到对象列表的ASP.NET Repeater创建HtmlTable
我正在以编程方式在中继器中创建一个表。我的问题是,项目模板部分中的单元格无法正确渲染。它们在表的标记后显示为文本节点。有人对如何正确渲染表格单元格有什么建议吗C# 使用动态绑定到对象列表的ASP.NET Repeater创建HtmlTable,c#,asp.net,webforms,C#,Asp.net,Webforms,我正在以编程方式在中继器中创建一个表。我的问题是,项目模板部分中的单元格无法正确渲染。它们在表的标记后显示为文本节点。有人对如何正确渲染表格单元格有什么建议吗 using System; using System.Collections.Generic; using System.Web.UI; using System.Web.UI.HtmlControls; using System.Web.UI.WebControls; namespace WebApplication1 { p
using System;
using System.Collections.Generic;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
namespace WebApplication1
{
public partial class WebForm2 : Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
var dogs = new List<Dog>
{
new Dog { Name = "Rex", Breed = "Russell Terrier" },
new Dog { Name = "Fido", Breed = "Poodle" },
new Dog { Name = "Fetcher", Breed = "Golden Retriever" },
};
var repeater = new Repeater { ID = "Repeater1" };
repeater.DataSource = dogs;
repeater.DataBind();
AddHeader(repeater);
AddItems(repeater, dogs);
PlaceHolder1.Controls.Add(repeater);
}
}
private void AddHeader(Repeater repeater)
{
var repeaterItem = new RepeaterItem(0, ListItemType.Header);
var table = new HtmlTable();
var row = new HtmlTableRow();
var cell1 = new HtmlTableCell("th") { InnerText = "Name" };
var cell2 = new HtmlTableCell("th") { InnerText = "Breed" };
row.Cells.Add(cell1);
row.Cells.Add(cell2);
table.Rows.Add(row);
repeaterItem.Controls.Add(table);
repeater.Controls.Add(repeaterItem);
}
private void AddItems(Repeater repeater, List<Dog> dogs)
{
for (var i = 0; i < repeater.Items.Count; i++)
{
var repeaterItem = new RepeaterItem(i + 1, ListItemType.Item);
var row = new HtmlTableRow();
var cell1 = new HtmlTableCell() { InnerText = dogs[i].Name };
var cell2 = new HtmlTableCell() { InnerText = dogs[i].Breed };
row.Cells.Add(cell1);
row.Cells.Add(cell2);
repeaterItem.Controls.Add(row);
repeater.Controls.Add(repeaterItem);
}
}
private sealed class Dog
{
public string Breed { get; set; }
public string Name { get; set; }
}
}
}
使用系统;
使用System.Collections.Generic;
使用System.Web.UI;
使用System.Web.UI.HTMLControl;
使用System.Web.UI.WebControl;
命名空间WebApplication1
{
公共部分类WebForm2:第页
{
受保护的无效页面加载(对象发送方、事件参数e)
{
如果(!IsPostBack)
{
var dogs=新列表
{
新狗{Name=“Rex”,Breed=“Russell Terrier”},
新狗{Name=“Fido”,Breed=“Poodle”},
新狗{Name=“Fetcher”,Breed=“Golden Retriever”},
};
var repeater=新的中继器{ID=“Repeater1”};
repeater.DataSource=狗;
repeater.DataBind();
AddHeader(中继器);
附加项(中继器、狗);
占位符1.控件.添加(中继器);
}
}
专用void AddHeader(中继器中继器)
{
var repeaterItem=新的repeaterItem(0,ListItemType.Header);
var table=新的HtmlTable();
var row=新的HtmlTableRow();
var cell1=新的HtmlTableCell(“th”){InnerText=“Name”};
var cell2=新的HtmlTableCell(“th”){InnerText=“Breed”};
row.Cells.Add(cell1);
行。单元格。添加(单元格2);
table.Rows.Add(行);
repeaterItem.Controls.Add(表);
repeater.Controls.Add(repeaterItem);
}
专用无效附加项(中继器中继器,列表狗)
{
对于(变量i=0;i
更新:多亏了Rob的帮助,我才能够让代码正常工作。现在,我有了一个功能齐全的中继器,它完全通过数据绑定加载到代码中。很好
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using ExtensionMethods.WebControls;
namespace WebApplication1
{
public partial class WebForm1 : Page
{
protected void Page_Load(object sender, EventArgs e)
{
var dogs = new List<Dog>
{
new Dog { Name = "Rex", Breed = "Russell Terrier" },
new Dog { Name = "Fido", Breed = "Poodle" },
new Dog { Name = "Fetcher", Breed = "Golden Retriever" },
};
var repeater = new Repeater
{
ID = "Repeater1",
HeaderTemplate = new CustomTemplate(ListItemType.Header),
ItemTemplate = new CustomTemplate(ListItemType.Item),
FooterTemplate = new CustomTemplate(ListItemType.Footer),
DataSource = dogs
};
repeater.DataBind();
PlaceHolder1.Controls.Add(repeater);
}
// Custom template class to add controls to the repeater's header, item and footer sections.
private sealed class CustomTemplate : ITemplate
{
private ListItemType ListItemType { get; set; }
public CustomTemplate(ListItemType type)
{
ListItemType = type;
}
public void InstantiateIn(Control container)
{
if (ListItemType == ListItemType.Header)
{
var table = new LiteralControl();
var head = new HtmlGenericControl("thead");
var row = new HtmlTableRow();
row.Cells.Add(new HtmlTableCell("th") { InnerText = "Breed" });
row.Cells.Add(new HtmlTableCell("th") { InnerText = "Name" });
head.Controls.Add(row);
table.Text = string.Format("<table>{0}<tbody>", head.RenderHtml());
container.Controls.Add(table);
}
else if (ListItemType == ListItemType.Item)
{
var row = new HtmlTableRow();
var cell1 = new HtmlTableCell();
cell1.Controls.Add(new Literal { ID = "LiteralBreed" });
row.Cells.Add(cell1);
var cell2 = new HtmlTableCell();
cell2.Controls.Add(new Literal { ID = "LiteralName" });
row.Cells.Add(cell2);
container.Controls.Add(row);
container.DataBinding += new EventHandler(Container_DataBinding);
}
else if (ListItemType == ListItemType.Footer)
{
var footer = new LiteralControl("</tbody></table>");
container.Controls.Add(footer);
}
}
// Event handler to populate the dog's breed and name in the table when data-binding occurs.
private void Container_DataBinding(object sender, EventArgs e)
{
var item = sender as RepeaterItem;
if (item != null)
{
var dog = ((Dog)item.DataItem);
var breed = item.FindDescendantsByType<Literal>().Single(x => x.ID == "LiteralBreed");
breed.Text = dog.Breed;
var name = item.FindDescendantsByType<Literal>().Single(x => x.ID == "LiteralName");
name.Text = dog.Name;
}
}
}
private sealed class Dog
{
public string Breed { get; set; }
public string Name { get; set; }
}
}
}
使用系统;
使用System.Collections.Generic;
使用System.Linq;
使用System.Web.UI;
使用System.Web.UI.HTMLControl;
使用System.Web.UI.WebControl;
使用ExtensionMethods.WebControls;
命名空间WebApplication1
{
公共部分类WebForm1:第页
{
受保护的无效页面加载(对象发送方、事件参数e)
{
var dogs=新列表
{
新狗{Name=“Rex”,Breed=“Russell Terrier”},
新狗{Name=“Fido”,Breed=“Poodle”},
新狗{Name=“Fetcher”,Breed=“Golden Retriever”},
};
var中继器=新中继器
{
ID=“Repeater1”,
HeaderTemplate=新的CustomTemplate(ListItemType.Header),
ItemTemplate=新的CustomTemplate(ListItemType.Item),
FooterTemplate=新的CustomTemplate(ListItemType.Footer),
数据源=狗
};
repeater.DataBind();
占位符1.控件.添加(中继器);
}
//自定义模板类,用于将控件添加到转发器的页眉、项目和页脚部分。
私有密封类CustomTemplate:ITemplate
{
私有ListItemType ListItemType{get;set;}
公共自定义模板(ListItemType类型)
{
ListItemType=类型;
}
公共容器(控制容器)
{
if(ListItemType==ListItemType.Header)
{
var table=新的LiteralControl();
var head=新的HtmlGenericControl(“THAD”);
var row=新的HtmlTableRow();
添加(新的HtmlTableCell(“th”){InnerText=“Breed”});
添加(新的HtmlTableCell(“th”){InnerText=“Name”});
head.Controls.Add(行);
table.Text=string.Format(“{0}”,head.RenderHtml());
container.Controls.Add(表);
}
else if(ListItemType==ListItemType.Item)
{
var row=新的HtmlTableRow();
var cell1=新的HtmlTableCell();
cell1.Controls.Add(新文本{ID=“LiteralBreed”});
row.Cells.Add(cell1);
var cell2=新的HtmlTableCell();
cell2.Controls.Add(新文本{ID=“LiteralName”});
行。单元格。添加(单元格2);
container.Controls.Add(行);
container.DataBinding+=新事件处理程序(container\u DataBinding);
}
else if(ListItemType==ListItemType.Footer)
{
var footer=新的LiteralControl(“”);
container.Controls.Add(页脚);
}
}
//事件处理程序,用于在数据绑定发生时在表中填充狗的品种和名称。
私有无效容器\u数据绑定(对象发送方、事件参数e)
{
var item=发送方作为RepeaterItem;
<table>
<tbody><tr>
<th>Name</th>
<th>Breed</th>
</tr></tbody>
</table>
<table>
<tbody>
<asp:Repeater ID="fooRepeater" runat="server" ></asp:Repeater>
</tbody>
</table>
private void AddItems(Repeater repeater, List<Dog> dogs)
{
var repeaterItem = new RepeaterItem(0, ListItemType.Header);
var table = new HtmlTable();
var row = new HtmlTableRow();
var cell1 = new HtmlTableCell("th") { InnerText = "Name" };
var cell2 = new HtmlTableCell("th") { InnerText = "Breed" };
row.Cells.Add(cell1);
row.Cells.Add(cell2);
table.Rows.Add(row);
for (var i = 0; i < repeater.Items.Count; i++)
{
repeaterItem = new RepeaterItem(i + 1, ListItemType.Item);
row = new HtmlTableRow();
cell1 = new HtmlTableCell() { InnerText = dogs[i].Name };
cell2 = new HtmlTableCell() { InnerText = dogs[i].Breed };
row.Cells.Add(cell1);
row.Cells.Add(cell2);
table.Rows.Add(row);
}
repeaterItem.Controls.Add(table);
repeater.Controls.Add(repeaterItem);
}