如何在EditItemTemplate中获得控件？

Question

我有一个DetailsView约束,EntityDataSource并试图从我的TextBoxes中获取值EditItemTemplates.

这是我的代码:

 <asp:DetailsView ID="DetailsView1" DataKeyNames="Name" runat="server" AutoGenerateRows="False"
OnDataBound="DetailsView_DataBound" DataSourceID="eds2" BorderWidth="0"
OnModeChanging="OnModeChanging" AutoGenerateEditButton="true"
OnItemUpdated="DetailsView_OnItemUpdated" OnItemUpdating="DetailsView_OnItemUpdating"
EmptyDataText="N/A" OnDataBinding="DetailsView_OnDataBinding" CellPadding="0"
CellSpacing="7" GridLines="None" CssClass="Center">
<Fields>
<asp:TemplateField HeaderText="Name">
    <EditItemTemplate>
    <asp:TextBox ID="txtName" runat="server" Text='<%# Bind("Name") %>'></asp:TextBox>
    </EditItemTemplate>
    <ItemTemplate>
    <asp:Label ID="lblName" runat="server" Text='<%# Bind("Name") %>'></asp:Label>
    </ItemTemplate>
</asp:TemplateField>
 <Fields>
</asp:DetailsView>

而背后的代码:

protected void OnModeChanging(object sender, DetailsViewModeEventArgs e)
{ 
    foreach (DetailsViewRow row in DetailsView1.Rows)
    {
        if (row.RowType != DataControlRowType.DataRow) continue;
        foreach (DataControlFieldCell cell in row.Cells)
        {
            var textbox = cell.FindControl("txtName");
            var textbox2 = row.FindControl("txtName");
        }
    }
}

textbox并且textbox2始终为null.我究竟做错了什么？如何获取文本框或其中的值？

Answer 1

您在编辑模板中声明了这些文本框.这些只会在您的模式设置为编辑时显示.我猜测当ModeChanging事件被触发时尚未发生这种情况.

将您的代码放入ModeChanged事件中,然后检查您是否正在编辑.

void DetailsView1_ModeChanged(object sender, EventArgs e)
{
    if (DetailsView1.CurrentMode != DetailsViewMode.Edit)
        return;

    foreach (DetailsViewRow row in DetailsView1.Rows)
    {
       var textbox = row.FindControl("txtName");
    }
}