asp文本框控件上必需的字段验证和当前日期验证 [英] Required Field Validation and Current Date Validation on asp textbox Control

问题描述

我有一个控件，如：

I have a control like:

<asp:TextBox ID="_txtLeadDate" runat="server"></asp:TextBox>
   <AjaxControl:CalendarExtender ID="_txtLeadDate_CalendarExtender" Format="dd/MMM/yyyy" runat="server" Enabled="True" TargetControlID="_txtLeadDate"></AjaxControl:CalendarExtender><br />
   <asp:RequiredFieldValidator ID="RequirePreDate" runat="server" ControlToValidate="_txtLeadDate" ErrorMessage="Please select a Date" ForeColor="Red" Font-Size="10px" SetFocusOnError="True"></asp:RequiredFieldValidator>

现在我正在尝试添加另一个验证，选择的日期不应该是过去的日期（仅当前和未来的日期）。我怎样才能做到这一点。请帮助。

Now I am trying to add another validation that date selected should't be a past date (only current and future date). How can I achieve that. Kindly help.

推荐答案

您可以简单地将开始日期设置为昨天，然后用户无法选择旧时代。在页面加载中执行如下

you can simply set start date as yesterday then user can't select old days. in page load do as below

protected void Page_Load(object sender, EventArgs e)
{
   _txtLeadDate_CalendarExtender.StartDate = DateTime.Now.AddDays(-1);   //to dissable past Date
}

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