GridView 中设置某列,截取字符串加"..." 和 鼠标放上去字符全部显示

前台HTML代码:

<asp:TemplateField>
                    <EditItemTemplate>
                        <asp:TextBox ID="TextBox4" runat="server" Text='<%# Bind("hire_date") %>'></asp:TextBox>
                    </EditItemTemplate>
                    <ItemTemplate>
                        <asp:Label ID="Label4" runat="server" Text='<%# PartSubString(DataBinder.Eval(Container.DataItem,"hire_date").ToString()) %>' ToolTip='<%# Bind("hire_date") %>'></asp:Label>
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField>
                    <ItemTemplate>
                        <asp:HyperLink id="HyperLink1" runat="server" Target="_blank" text='<%# PartSubString(DataBinder.Eval(Container.DataItem,"emp_id").ToString())%>'NavigateUrl='<%# DataBinder.Eval(Container.DataItem,"emp_id")%>' ToolTip='<%# DataBinder.Eval(Container.DataItem,"emp_id")%>'>
                        </asp:HyperLink>
                    </ItemTemplate>
                </asp:TemplateField>

ToolTip 指鼠标放上出时读取字段的全部信息...

后台代码:

 protected string PartSubString(string s)
    ...{
        if (s.Length > 5)
        ...{
            return s.Substring(0, 5) + "...";
        }
        return s;
    }