GridView中的字符串格式化

 <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" CellPadding="4"
            ForeColor="#333333" GridLines="None" AllowSorting="True" OnRowCancelingEdit="GridView1_RowCancelingEdit"
            OnRowDeleting="GridView1_RowDeleting" OnRowUpdating="GridView1_RowUpdating" PageSize="6"
            OnRowEditing="GridView1_RowEditing" OnRowDataBound="GridView1_RowDataBound1" Height="158px">
            <FooterStyle BackColor="#990000" Font-Bold="True" ForeColor="White" />
            <Columns>
                <asp:BoundField DataField="UserID" HeaderText="用户ID" ReadOnly="True" />
                <asp:BoundField DataField="User_Nm" HeaderText="用户姓名" />
                <asp:BoundField DataField="User_Sex" HeaderText="性别" />
                <asp:BoundField DataField="User_Address" HeaderText="家庭住址" />
                <asp:TemplateField HeaderText="出生日期">
                    <EditItemTemplate>
                        <asp:Label ID="Label1" runat="server" Text='<%# Eval("User_Birthday","{0:M-dd-yyyy}") %>'></asp:Label>
                    </EditItemTemplate>
                    <ItemTemplate>
                        <asp:Label ID="Label1" runat="server" Text='<%# Eval("User_Birthday","{0:M-dd-yyyy}") %>'></asp:Label>
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:CommandField HeaderText="选择" ShowSelectButton="True" />
                <asp:CommandField HeaderText="编辑" ShowEditButton="True" />
                <asp:CommandField HeaderText="删除" ShowDeleteButton="True" />
            </Columns>
            <RowStyle ForeColor="#008066" />
            <SelectedRowStyle BackColor="#669999" Font-Bold="True" ForeColor="White" />
            <PagerStyle BackColor="#006699" Font-Bold="True" ForeColor="White" />
            <HeaderStyle BackColor="#006699" Font-Bold="True" ForeColor="White" />
        </asp:GridView>

页面后台代码同以前的代码。只是把前台的出生日期作为模板列来操作。

根据CSDN的清清月儿的写法，还可以<asp:BoundField DataField="User_Birthday" HeaderText ="出生日期" HtmlEncode="false" />

只需要增加HtmlEncode设置为False。