方法一：

 <asp :GridView ID="GridView1" runat="server">

 <columns>

 <asp :BoundField DataField="CreationDate"

 DataFormatString="{0:M-dd-yyyy}"

 HtmlEncode="false"

 HeaderText="CreationDate" />

 </columns>

 </asp>

 将htmlencode设置为false即可

 方法二：

 使用模板列

 <asp :GridView ID="GridView3" runat="server" >

 <columns>

 <asp :TemplateField HeaderText="CreationDate" >

 <edititemtemplate>

 <asp :Label ID="Label1" runat="server"

 Text='<%# Eval("CreationDate", "{0:M-dd-yyyy}") %>'>

 </asp>

 </edititemtemplate>

 <itemtemplate>

 <asp :Label ID="Label1" runat="server"

 Text=’<%# Bind("CreationDate", "{0:M-dd-yyyy}") %>'>

 </asp>

 </itemtemplate>

 </asp>

 </columns>

 </asp>