这就是我所拥有的。有用。但是,有更简单或更好的方法吗?
ASPX Page ...
<asp:Repeater ID="RepeaterBooks" runat="server">
<HeaderTemplate>
<table class="report">
<tr>
<th>Published</th>
<th>Title</th>
<th>Author</th>
<th>Price</th>
</tr>
</HeaderTemplate>
<ItemTemplate>
<tr>
<td><asp:Literal ID="LiteralPublished" runat="server" /></td>
<td><asp:Literal ID="LiteralTitle" runat="server" /></td>
<td><asp:Literal ID="LiteralAuthor" runat="server" /></td>
<td><asp:Literal ID="LiteralPrice" runat="server" /></td>
</tr>
</ItemTemplate>
<FooterTemplate>
</table>
</FooterTemplate>
</asp:Repeater>
ASPX.VB代码背后......
Protected Sub Page_Load( ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim db As New BookstoreDataContext
RepeaterBooks.DataSource = From b In db.Books _
Order By b.Published _
Select b
RepeaterBooks.DataBind()
End Sub
Sub RepeaterBooks_ItemDataBound( ByVal sender As Object, ByVal e As System.Web.UI.WebControls.RepeaterItemEventArgs) Handles RepeaterBooks.ItemDataBound
If e.Item.ItemType = ListItemType.Item Or e.Item.ItemType = ListItemType.AlternatingItem Then
Dim b As Book = DirectCast(e.Item.DataItem, Book)
DirectCast(e.Item.FindControl("LiteralPublished"), Literal).Text = "<nobr>" + b.Published.ToShortDateString + "</nobr>"
DirectCast(e.Item.FindControl("LiteralTitle"), Literal).Text = "<nobr>" + TryNbsp(HttpContext.Current.Server.HtmlEncode(b.Title)) + "</nobr>"
DirectCast(e.Item.FindControl("LiteralAuthor"), Literal).Text = "<nobr>" + TryNbsp(HttpContext.Current.Server.HtmlEncode(b.Author)) + "</nobr>"
DirectCast(e.Item.FindControl("LiteralPrice"), Literal).Text = "<nobr>" + Format(b.Price, "c") + "</nobr>"
End If
End Sub
Function TryNbsp(ByVal s As String) As String
If s = "" Then
Return " "
Else
Return s
End If
End Function
答案 0 :(得分:4)
@Geoff
这种Eval语句实际上是在2.0中添加的,但是如果性能很重要,应避免使用Eval,因为它使用了Reflection。
转发器是一种非常好的方法,尽管在代码中生成表可能会更快:
ASPX页面:
<table class="report" id="bookTable" runat="server">
<tr>
<th>Published</th>
<th>Title</th>
<th>Author</th>
<th>Price</th>
</tr>
</table>
代码背后:
Protected Sub Page_Load( ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not Page.IsPostback Then
BuildTable()
End If
End Sub
Private Sub BuildTable()
Dim db As New BookstoreDataContext
Dim bookCollection = from b in db.Books _
Order By b.Published _
Select b
Dim row As HtmlTableRow
Dim cell As HtmlTableCell
For Each book As Books In bookCollection
row = New HtmlTableRow()
cell = New HtmlTableCell With { .InnerText = b.Published.ToShortDateString }
row.Controls.Add(cell)
cell = New HtmlTableCell With { .InnerText = TryNbsp(HttpContext.Current.Server.HtmlEncode(b.Title)) }
row.Controls.Add(cell)
cell = New HtmlTableCell With { .InnerText = TryNbsp(HttpContext.Current.Server.HtmlEncode(b.Author))
row.Controls.Add(cell)
cell = New HtmlTableCell With { .InnerText = Format(b.Price, "c") }
row.Controls.Add(cell)
bookTable.Controls.Add(row)
Next
我想这取决于速度对你的重要程度。为了简单起见,我想我会选择Repeater。
答案 1 :(得分:3)
框架3.5引入的ListView控件可能是一个更好的解决方案。你的标记看起来像这样:
<asp:ListView runat="server" ID="ListView1"
DataSourceID="SqlDataSource1">
<LayoutTemplate>
<table runat="server" id="table1" runat="server" >
<tr runat="server" id="itemPlaceholder" ></tr>
</table>
</LayoutTemplate>
<ItemTemplate>
<tr runat="server>
<td runat="server">
<asp:Label ID="NameLabel" runat="server"
Text='<%#Eval("Name") %>' />
</td>
</tr>
</ItemTemplate>
</asp:ListView>
答案 2 :(得分:2)
在.Net 3.0+中,您可以通过执行以下操作将ItemDataBound替换为asp:Literal:
<ItemTemplate>
<tr>
<td><%# Eval("published") %></td>
...
其中“已发布”是您绑定到转发器的数据中字段的名称
编辑: @ Alassek:我认为反思的表现经常被过分强调。显然,您需要对应用程序的性能进行基准测试,但Eval的命中率可能以毫秒为单位。除非您的应用程序提供多个并发命中,否则这可能不是问题,使用Eval的代码的简单性,以及它是一个很好的表示分离,使它成为一个很好的解决方案。
答案 3 :(得分:1)
我同意Geoff的观点,我们唯一一次使用Literals
是我们想要对数据执行不同的事情。
例如,我们可能希望DueDate
字段说“今天”或“昨天”而不是实际日期。
答案 4 :(得分:1)
这就是GridView的用途。
<asp:GridView runat="server" DataSourceID="SqlDataSource1">
<Columns>
<asp:BoundField HeaderText="Published" DataField="Published" />
<asp:BoundField HeaderText="Author" DataField="Author" />
</Columns>
</asp:GridView>
答案 5 :(得分:1)
我会使用GridView(或DataGrid,如果您使用的是旧版本的ASP.NET)。
<asp:GridView ID="gvBooks" runat="server" AutoGenerateColumns="False">
<Columns>
<asp:BoundField HeaderText="Published" DataField="Published" />
<asp:BoundField HeaderText="Title" DataField="Title" />
<asp:BoundField HeaderText="Author" DataField="Author" />
<asp:BoundField HeaderText="Price" DataField="Price" />
</Columns>
</asp:GridView>
使用一些代码隐藏:
Private Sub gvBooksRowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles gvBooks.RowDataBound
Select Case e.Row.RowType
Case DataControlRowType.DataRow
''' Your code here '''
End Select
End Sub
您可以以类似的方式绑定它。 RowDataBound事件就是您所需要的。
答案 6 :(得分:0)
ALassek 写道:
...在代码中生成表格......
我喜欢那个样子!由于拼写错误或字段名称更改,似乎不太可能产生运行时异常。
答案 7 :(得分:0)
如果你不需要ASP.NET处理编辑功能,我会远离DataGrid和GridView ...它们提供不必要的膨胀。