Question

我有一个数据网格，其中包含带有标签的项目模板：

       <asp:datagrid id="ID" runat="server" Width="641px" CellPadding="2" PageSize="2"  DataKeyField="IDs"
                            AutoGenerateColumns="False" ShowFooter="True" BorderColor="AliceBlue" OnItemDataBound="ID_ItemDataBound" >
      <SelectedItemStyle ForeColor="HighlightText" BackColor="Highlight">   </SelectedItemStyle>
           <AlternatingItemStyle BackColor="WhiteSmoke">
        </AlternatingItemStyle>
                            <HeaderStyle Font-Bold="True" BackColor="AliceBlue">
        </HeaderStyle>
                            <FooterStyle Font-Bold="True" BackColor="AliceBlue">
        </FooterStyle>
                            <Columns>
            <ItemTemplate>
<asp:label BorderStyle=None Visible='<%# ReverseBool(Convert.ToBoolean(DataBinder.Eval(Container, "DataItem.IsCompleteOrNot"))) %>'   runat="server" ID="dataScore" Text='<%# DataBinder.Eval(Container, "DataItem.dataScore" ) %>'>
     </asp:label>
    <asp:label BorderStyle=None Text='<%# GetCompleteIncomplete(Convert.ToInt32(DataBinder.Eval(Container, "DataItem.dataScore")!=null)) %>' Visible='<%# DataBinder.Eval(Container, "DataItem.IsCompleteOrNot") %>' id="txtIsComplete" runat="server">
        </asp:label>
            </ItemTemplate>
            </columns>

我试图将0设置为空白而不是在DataGrid中显示0，所以在ItemData绑定我得到像这样的标签并尝试将值设置为null：

if ((e.Item.ItemType == ListItemType.Item) ||
          (e.Item.ItemType == ListItemType.AlternatingItem))
        {

            Label dataScore = (Label)e.Item.FindControl("dataScore"); // Gets that Label
            Label txtIsComplete = (Label)e.Item.FindControl("txtIsComplete");



 if(dataScore .Text == "0")
            {
                dataScore.Text = string.Empty; // Tried 
            }

Answer 1

您可以编写一个函数来分析DataBinder.Eval的值

Private String MyFunction(String value)
{
    Return value == "0" ? String.Empty : value;
}

<asp:label BorderStyle=None Visible='<%# ReverseBool(Convert.ToBoolean(DataBinder.Eval(Container, "DataItem.IsCompleteOrNot"))) %>'   runat="server" ID="dataScore" Text='<%# MyFunction(DataBinder.Eval(Container, "DataItem.dataScore" )) %>'>

如果数据网格asp.net上的值为0，则将值设置为Null

1 个答案: