vb.net 如何计算asp中继器中的项目数？
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How to count the number of items in an asp repeater?
提问by DreamTeK
How to count the number of items in a repeater using ASP.NET?
如何使用 ASP.NET 计算中继器中的项目数？
I would like to display something along the lines of:
我想显示以下内容：
MARKUP
标记
Page 1 of 5
第 1 页，共 5 页
ASPX
ASPX
Get Item Index: (working)
获取项目索引：（工作）
<%# DataBinder.Eval(Container, "ItemIndex", "") + 1%>
Count total items: (failing)
计算总项目数：（失败）
<%# DataBinder.Eval(Container.ItemIndex, rpt.Items.Count)%>
I would prefer to do this on page however am open to suggestions and code behind.
我更愿意在页面上执行此操作，但我愿意接受建议和背后的代码。
采纳答案by Ahmad Joumah
This is the best solution I get it
这是我得到的最好的解决方案
<asp:Repeater ID="rptGallery" runat="server" >
<ItemTemplate>
<div>
<div>
<asp:Label ID="Number_of_element_in_repeater" runat="server"
Text='<%#Convert.ToString(((IList((Repeater)Container.Parent).DataSource).Count) %>'>
</asp:Label>
</div>
</div>
</ItemTemplate>
</asp:Repeater>
The number of items in repeater is:
中继器中的项目数为：
Convert.ToString(((IList)((Repeater)Container.Parent).DataSource).Count)
回答by ewitkows
I believe a SqlDataSource uses a "SQLdatareader", which is one by one row access. So if it has rows, it returns one row at a time, not knowing how much more it has to go.
我相信 SqlDataSource 使用“SQLdatareader”，它是逐行访问的。所以如果它有行，它一次只返回一行，不知道还有多少行。
You could include in your rowset the total amount of rows (something like count(*)), and return that as a field in each row. It's not ideal, but it's one way to return it to your current code.
您可以在行集中包含总行数（类似于 count(*)），并将其作为每行中的一个字段返回。这并不理想，但这是将其返回到当前代码的一种方法。
If you're not opposed to using the codebehind instead\as well, you could call out and fetch the records to get a rowcount that way, and then use that value in your markup (setting it as a hidden field, for example). Either way, you'll need to iterate through all rows before you know how many rows you have.
如果您也不反对使用代码隐藏，那么您可以调用并获取记录以通过这种方式获取行数，然后在标记中使用该值（例如，将其设置为隐藏字段）。无论哪种方式，您都需要遍历所有行才能知道有多少行。
回答by Duned
It looks like you need to cast to a data type that supports the properties you are using, try this:
看起来您需要转换为支持您正在使用的属性的数据类型，试试这个：
((Container.Parent as Repeater).DataSource as IList).Count
