可以将数据保存在一个动态绑定GridView的看不见的领域？ [英] Can data be kept in a dynamically bound GridView's invisible fields?

问题描述

我有一个查询前pression这我绑定在Page_Load中的GridView。我想在SelectedIndexChaned事件来捕获的数据是这样定义一个BoundField：

I have a query expression which I am binding to a GridView in Page_Load. The data I want to capture in the SelectedIndexChaned event is in a BoundField defined thus:

<asp:BoundField DataField="ID" HeaderText="ID" ReadOnly="True" 
                            SortExpression="ID" Visible="False"  />

如果我设置可见=真，我没有麻烦此数据。有没有一种方法来隐藏ID字段，仍然可以得到的数据？

If I set Visible="True", I have no trouble getting this data. Is there a way to hide the ID field and still get the data?

推荐答案

取决于你如何试图获取数据。如果这是一个ID字段，为每个行唯一的数据源，使用的DataKeyNames =ID在GridView声明。然后，在code的后面，当你需要的ID，可以使用以下行：

Depends on how you are trying to get the data. If this is an ID field that is unique for each row in the datasource, use DataKeyNames = "ID" in the GridView declaration. Then, in the code behind, whenever you need the ID, you can use the following line:

string ID = GridView1.Rows[GridRowIndex].DataKeys[0].Value.ToString();

您也可以转换的绑定列到一个TemplateField之一，并放置一个HiddenField在它来存储的ID。像这样：

You could also convert one of your BoundFields to a TemplateField, and place a HiddenField in it to store the ID. Like so:

<asp:TemplateField>
    <ItemTemplate>
        <asp:Label ID="someOtherDataLabel" runat="server" />
        <asp:HiddenField ID="IDHiddenField" runat=server />
    </ItemTemplate>
</asp:TemplateField>

然后就可以使用的FindControl（）在GridView的的RowDataBound 事件存储的ID值。

Then you could use FindControl() in the RowDataBound event of the GridView to store the ID value.

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