如果gridview为空，如何在gridview内显示标签 [英] how to display labels inside gridview if gridview is empty

问题描述

在gridview里面我添加了以下标签，如果它们在数据库中没有值我想显示以下标签，那么我可以编辑那些字段并更新gridview中的数据，如果你对它有所了解，对我来说非常有用。

< asp：TemplateField> 
< itemtemplate> 
< asp：Label runat =serverID =lblnameclass =form-controlText =Name> 
< asp：Label runat =serverID =lblphoneclass =form-controlText =Phone> 
< asp：Label runat =serverID =lblemailclass =form-controlText =Email> 
< asp：Label runat =serverID =lblcurentaddclass =form-controlText =Current Address> 
< asp：Label runat =serverID =lblperaddclass =form-controlText =Permanent Address> 
< / itemtemplate> 
< asp：TemplateField> 
< itemtemplate> 
< asp：Label ID =lblnameaclass =form-controlrunat =serverText ='<％＃Eval（user_name）％>'> 
< asp：Label ID =lblphoneaclass =form-controlrunat =serverText ='<％＃Eval（phone）％>'> 
< asp：Label ID =lblemailaclass =form-controlrunat =serverText ='<％＃Eval（email_id）％>'> 
< asp：Label ID =lblcurentaddaclass =form-controlrunat =serverText ='<％＃Eval（current_address）％>'> 
< asp：Label ID =lblperaddaclass =form-controlrunat =serverText ='<％＃Eval（permanent_address）％>'> < / ItemTemplate中> 

解决方案

您可以通过三元运算符和Eval轻松完成此工作。



参考 - 用默认值替换空值数据绑定项 [ ^ ]。

inside gridview i have added following labels , if their is no values inside database i want to display following labels, so i can edit that fields and update data inside gridview, guys if you know something about it will very helpful for me.

<asp:TemplateField >
  <itemtemplate>
  <asp:Label runat="server" ID="lblname" class="form-control" Text="Name">
  <asp:Label runat="server" ID="lblphone" class="form-control" Text="Phone">  
  <asp:Label runat="server" ID="lblemail" class="form-control" Text="Email">
  <asp:Label runat="server" ID="lblcurentadd" class="form-control" Text="Current Address">
  <asp:Label runat="server" ID="lblperadd" class="form-control" Text="Permanent Address">
 </itemtemplate>
<asp:TemplateField  >
 <itemtemplate>
     <asp:Label ID="lblnamea" class="form-control" runat="server" Text='<%# Eval("user_name")%>'>
     <asp:Label ID="lblphonea" class="form-control" runat="server" Text='<%# Eval("phone")%>' >  
     <asp:Label ID="lblemaila" class="form-control" runat="server" Text='<%# Eval("email_id")%>'>
     <asp:Label ID="lblcurentadda" class="form-control" runat="server" Text='<%# Eval("current_address")%>'>
     <asp:Label ID="lblperadda"  class="form-control" runat="server" Text='<%# Eval("permanent_address")%>'>                                                                                                                                          </itemtemplate> 

解决方案

You can easily do this by ternary operator along with Eval.

Refer - Replace null value databind item with default value[^].

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